Lithium battery carbonization device with staged temperature control

Abstract

The lithium battery carbonization device comprises a carbonization furnace, a carbonization furnace rotating mechanism and a temperature control mechanism, and the temperature control mechanism comprises a temperature control support, a temperature control cover and a temperature adjusting structure; a heat exchange cavity is formed between the inner wall of the temperature control cover and the outer wall of the carbonization furnace, and the heat exchange cavity is provided with a first heat exchange sub-cavity, a second heat exchange sub-cavity and a third heat exchange sub-cavity in the conveying direction of materials in the carbonization furnace; the first heat exchange sub-cavity is close to a feeding hole of the carbonization furnace; the third heat exchange sub-cavity is close to a discharge hole of the carbonization furnace; according to the utility model, the temperature of different areas of the carbonization furnace is controlled by stages, so that the temperature in the carbonization furnace is gradually reduced from low to high, the crushed battery materials are combusted at different temperatures in the conveying process of one carbonization furnace, and the combustion efficiency is improved. A large amount of organic matters in the crushed battery materials are removed, VOC emission pollutants are reduced, the oxidation rate of metal materials is reduced, and the recoverable rate of the metal materials is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery recycling technical field, concretely relates to a lithium battery carbonization device of stage temperature control. BACKGROUND

[0002] Lithium battery is a kind of disposable battery with lithium metal or lithium alloy as negative electrode material, uses non-aqueous electrolyte solution. Under the drive of the high-speed growth of electric vehicle production, China's lithium battery industry continues to maintain the rapid growth trend, and the recycling research of the obsolete lithium battery brought by this becomes an urgent problem to be solved. The obsolete lithium ion battery pack is in the recycling process, due to the diversity of the structure and the shape size of the recycled lithium battery, the artificial participation is higher. Now the conventional processing mode has two kinds: one is to take out the pole roll from the shell of electric core, and the black powder is obtained by crushing and separating after the positive and negative pole pieces are separated by artificial disassembly, but the mode makes the electrolyte on the positive and negative pole pieces easy to volatilize to the air, and it will cause harm to human body and environment;Another mode is to directly crush and separate the pole roll to obtain black powder, but the black powder obtained by the mode has high impurity content, increases the impurity removal cost of subsequent hydrometallurgy, and is not very friendly to the environment. SUMMARY

[0003] The utility model provides a lithium battery carbonization device of stage temperature control for solving the deficiency described in the prior art.

[0004] The technical scheme adopted by the utility model is:

[0005] The utility model provides a kind of staged temperature control's lithium battery carbonization device, including carbonization furnace and carbonization furnace rotating mechanism, carbonization furnace is obliquely arranged on carbonization furnace rotating mechanism and rotates in situ under the driving of carbonization furnace rotating mechanism, the carbonization furnace is provided with temperature control mechanism, and the temperature control mechanism includes temperature control support, temperature control cover and temperature adjusting structure;Temperature control cover is arranged on temperature control support, and carbonization furnace is arranged through temperature control cover and rotates relative to temperature control cover;Carbonization furnace and temperature control cover are sealed contact;The heat exchange cavity is formed between the inner wall of temperature control cover and the outer wall of carbonization furnace, and along the material conveying direction in carbonization furnace, the heat exchange cavity has sequentially through first heat exchange sub-cavity, second heat exchange sub-cavity and third heat exchange sub-cavity;First heat exchange sub-cavity is close to the feed inlet of carbonization furnace;Third heat exchange sub-cavity is close to the discharge port of carbonization furnace;Temperature adjusting structure is arranged at first heat exchange sub-cavity, second heat exchange sub-cavity and third heat exchange sub-cavity, and the temperature of carbonization furnace corresponding to second heat exchange sub-cavity is highest.Carbonization furnace rotating mechanism drives carbonization furnace to rotate in situ, and battery scrap in carbonization furnace is combusted and is spirally conveyed, by adjusting temperature adjusting structure at heat exchange cavity, the temperature of carbonization furnace in temperature control cover is changed, so that the temperature in carbonization furnace from feed end to discharge end is low temperature first, then high temperature and finally low temperature, that is, the temperature in carbonization furnace corresponding to first heat exchange sub-cavity is lower, the temperature in carbonization furnace corresponding to second heat exchange sub-cavity is highest, and the temperature in carbonization furnace corresponding to third heat exchange sub-cavity is reduced, the staged control of different regions of carbonization furnace is realized by temperature adjusting structure, and then the metal material in broken material is not oxidized, but the black powder on the surface of metal material falls off, and the recyclability of metal material is improved.

[0006] As a preferred scheme of the utility model, the carbonization furnace rotating mechanism includes rotating bearing frame, rotating motor and rotating gear ring, the rotating bearing frame is arranged at both ends of the carbonization furnace, and the temperature control cover is located between the rotating bearing frames;A rotating gear ring is arranged on the outer wall of the carbonization furnace, the rotating gear ring is engaged with the driving gear on the output shaft of the rotating motor, and the rotating motor is installed on the corresponding rotating bearing frame.

[0007] As a preferred scheme of the utility model, a feeding mechanism is arranged at the feed inlet of the carbonization furnace, the feeding mechanism includes a feeding support, a feeding hopper and a feeding cover, the feed inlet of the carbonization furnace extends into the feeding cover, and the carbonization furnace rotates relative to the feeding cover;The feeding cover is arranged on the feeding support, the discharge port of the feeding hopper is fixed on the feeding cover and communicates with the feed inlet of the carbonization furnace;An anti-fire overflow structure is arranged in the feeding hopper.

[0008] As a preferred scheme of the utility model, a burner is further arranged at the feed inlet of the carbonization furnace, and the combustion outlet of the burner extends into the feed inlet of the carbonization furnace through the feeding cover.

[0009] As a preferred scheme of the utility model, the temperature adjusting structure comprises a wind cooling structure and a water cooling structure. The cold air amount and the cold water amount of the wind cooling structure corresponding to the first heat exchange sub-cavity are more than those of the second heat exchange sub-cavity, and the cold air amount and the cold water amount of the wind cooling structure corresponding to the third heat exchange sub-cavity are the most. Because the battery scrap in the first heat exchange sub-cavity is in the initial combustion stage, the temperature is not particularly high, and the temperature in the carbonization furnace is increased through sufficient combustion in the conveying process, the amount of heat exchange of the cold air and the cold water entering the second heat exchange sub-cavity is controlled, and the temperature needs to be reduced before the discharge of the carbonization furnace, so the cold air and the cold water need to be adjusted. The temperature difference with the carbonization furnace is adjusted by controlling the amount of the cold air and the cold water, and then the temperature of different regions of the carbonization furnace is controlled.

[0010] As a preferred scheme of the utility model, the wind cooling structure comprises a fan, an air inlet channel, an air inlet and an air outlet. The air outlet of the fan is communicated with the air inlet channel, and the air inlet channel is provided with a wind cooling electromagnetic valve. The air inlet channel is communicated with the air inlet, and the air inlet is arranged at the lower part of the temperature control cover. The air outlet is arranged at the top of the temperature control cover. The air inlet channel, the air inlet, the heat exchange cavity and the air outlet form a wind cooling and temperature reducing channel. The fan sends the cold air from the air inlet channel into the temperature control cover, the cold air exchanges heat with the carbonization furnace from the bottom to the top, the temperature of the carbonization furnace is reduced, and the air after heat exchange is discharged from the air outlet.

[0011] As a preferred scheme of the utility model, a spoiler is arranged in the air inlet channel. The air inlet channel is a triangular channel, the closer to the air inlet, the wider the channel, and the spoiler is arranged to divide the cold air entering the channel, so that the cold air enters the corresponding heat exchange sub-cavity uniformly, and the cold air between adjacent heat exchange sub-cavities can have an overlapping area.

[0012] As a preferred scheme of the utility model, the water cooling structure comprises a main water pipe, a branch water pipe, a spray head, an electromagnetic valve, a water tank and a water pump. A main water pipe is arranged on each side of the temperature control cover corresponding to the heat exchange cavity, a plurality of branch water pipes are communicated with the main water pipe, a spray head is arranged on each branch water pipe, the spray head is inserted into the temperature control cover, an electromagnetic valve is arranged between the branch water pipe and the spray head, a collecting and draining port is arranged at the bottom of the temperature control cover, a drainage pipeline is communicated with the collecting and draining port, the drainage pipeline is connected to the water inlet of the water tank, the water outlet of the water tank is communicated with the water inlet of the water pump, and the water outlet of the water pump is communicated with the main water pipe through a three-way pipe. Cold water is introduced into the main water pipe and enters each branch water pipe, the amount of water sprayed by the spray head is controlled through the electromagnetic valve, the water is sprayed from multiple angles in a ring shape to exchange heat with the carbonization furnace, the water after heat exchange is discharged from the collecting and draining port, flows into the water tank, and is pumped into the spray head of each heat exchange sub-cavity for spray atomization cooling after pressure filtration. In order to utilize a small amount of water to reduce high temperature and achieve energy saving and temperature control, the water cooling structures on the same side of the heat exchange cavity share a main water pipe.

[0013] As a preferred scheme of the utility model, a plurality of temperature sensors are installed in the carbonization furnace corresponding to the temperature control cover. At least one temperature sensor is arranged in the carbonization furnace part corresponding to each heat exchange sub-cavity. The temperature sensor adopts an infrared temperature sensor. The cold air valve and the cold water valve are automatically adjusted according to the detected temperature to change the amount of cold air and cold water flowing into each heat exchange sub-cavity, so as to regulate and control the different temperatures of different regions of the carbonization furnace, and make the temperature of the carbonization furnace gradually reach the controllable range of the required temperature along the material conveying direction. Each temperature sensor is connected with a controller, the controller is connected with electromagnetic valves of each water cooling structure, and the controller is connected with each fan and each air cooling electromagnetic valve. The controller controls the corresponding electromagnetic valve and air cooling electromagnetic valve according to the detected temperature, so as to control the water spraying amount of each spray head and the cold air input amount of each fan.

[0014] As a preferred scheme of the utility model, the carbonization furnace has a main conveying cavity, a neck conveying cavity and a discharge cavity, the diameter of the discharge cavity is smaller than that of the main conveying cavity, the axes of the main conveying cavity, the neck conveying cavity and the discharge cavity coincide, the inner wall of the main conveying cavity is provided with a plurality of first spiral belts, the first spiral belts are distributed in an annular array with the central axis of the main conveying cavity as the center, the inner wall of the neck conveying cavity is provided with a plurality of second spiral belts, the second spiral belts are distributed in an annular array with the axis of the neck conveying cavity as the center, and the inner wall of the discharge cavity is provided with a plurality of third spiral belts, the third spiral belts are distributed in an annular array with the axis of the discharge cavity as the center. During the rotation of the carbonization furnace, the battery scraps are conveyed forward under the spiral guidance of the first spiral belts, the second spiral belts and the third spiral belts, which can increase the friction degree of the battery scraps after combustion, play a good low-altitude stirring role, quickly combust the electrolyte, avoid metal oxidation, improve the probability of the black particles formed after the organic matter on the metal material is carbonized from falling off the metal material, and avoid the adhesion of the black particles affecting the conveying.

[0015] As a preferred scheme of the utility model, the second spiral belt and the corresponding first spiral belt are arranged in a staggered manner, and the third spiral belt and the corresponding second spiral belt are arranged in a staggered manner.

[0016] The utility model discloses a wind -cooled structure and water -cooled structure and corresponding carbonization furnace part's heat exchange amount's control realize the phased control of carbonization furnace different area temperature, make carbonization furnace temperature from low to high again to the trapezoidal change of bottom, make the battery scrap in a carbonization furnace conveying process to burn at different temperature, remove the large amount of organic matter in battery scrap, reduce VOC emission pollutant, and reduce the oxidation rate of metal material, make metal material not oxidize, promote the recyclability of metal material. Moreover, the spiral belt is arranged on the inner wall of the carbonization furnace, which can increase the friction degree of the battery scrap after combustion, play a good low-altitude stirring role, quickly burn the electrolyte, avoid metal oxidation, improve the probability of black particles formed after the carbonization of organic matter on the metal material falling off from the metal material, and avoid the adhesion of black particles affecting the conveying. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Figure 1 Structure diagram of the utility model Figure 1 .

[0019] Figure 2 Structure diagram of the utility model Figure 2 .

[0020] Figure 3 Structure diagram of the carbonization furnace of the utility model.

[0021] Figure 4 Assembly schematic view of the first spiral belt, the second spiral belt and the third spiral belt of the utility model.

[0022] Figure 5 Assembly schematic view of the carbonization furnace and the feeding mechanism of the utility model. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] Embodiment:

[0025] A staged temperature-controlled lithium battery carbonization device, as shown in Figure 1 and 2 The carbonization furnace 1 is obliquely arranged on the carbonization furnace rotating mechanism 2 and rotates in situ under the driving of the carbonization furnace rotating mechanism 2.

[0026] As shown in Figure 3 and 4 The carbonization furnace has a main conveying cavity 1-1, a necked conveying cavity 1-2 and an exhaust cavity 1-3, the diameter of the exhaust cavity 1-3 is smaller than that of the main conveying cavity 1-1; the axes of the main conveying cavity 1-1, the necked conveying cavity 1-2 and the exhaust cavity 1-3 coincide; the inner wall of the main conveying cavity 1-1 is provided with a plurality of first spiral belts 1-4, five first spiral belts 1-4 are arranged in the embodiment, and each first spiral belt 1-4 is arranged in a ring array with the central axis of the main conveying cavity 1-1 as the center; the inner wall of the necked conveying cavity 1-2 is provided with a plurality of second spiral belts 1-5, each second spiral belt 1-5 is arranged in a ring array with the axis of the necked conveying cavity 1-2 as the center; the second spiral belt 1-5 and the corresponding first spiral belt 1-4 are arranged in a staggered manner.

[0027] The inner wall of the exhaust cavity 1-3 is provided with a plurality of third spiral belts 1-6, each third spiral belt 1-6 is arranged in a ring array with the axis of the exhaust cavity 1-3 as the center, and the third spiral belt 1-6 and the corresponding second spiral belt 1-5 are arranged in a staggered manner.

[0028] During the rotation of the carbonization furnace, the battery scraps are conveyed forward under the spiral guidance of the first spiral belt, the second spiral belt and the third spiral belt, which can increase the friction degree of the battery scraps after combustion, play a good low-altitude stirring role, quickly combust the electrolyte, avoid metal oxidation, improve the probability of the black particles formed by the carbonization of the organic matter on the metal material falling off from the metal material, and avoid the adhesion of the black particles affecting the conveying.

[0029] The carbonization furnace rotating mechanism 2 includes a rotating bearing frame 21, a rotating motor and a rotating gear ring, the rotating bearing frame 21 is arranged at both ends of the carbonization furnace 1, supports the carbonization furnace and can rotate, a rotating gear ring is arranged on the outer wall of the carbonization furnace, the rotating gear ring is engaged with a driving gear on the output shaft of the rotating motor, and the rotating motor is installed on the corresponding rotating bearing frame.

[0030] A feeding mechanism is arranged at the feeding port of the carbonization furnace 1, as shown in Figure 5As shown, the feeding mechanism includes a feeding support 41, a feeding hopper 42 and a feeding cover 43, the feeding port of the carbonization furnace 1 extends into the feeding cover 43, and the carbonization furnace 1 rotates relative to the feeding cover; the feeding cover 43 is arranged on the feeding support 41, and the discharging port of the feeding hopper 42 is fixed on the feeding cover 43 and communicates with the feeding port of the carbonization furnace; the feeding hopper 42 is provided with an anti-fire overflow structure, and the present embodiment adopts staggered baffles. After the battery scraps enter the feeding hopper, they fall into the carbonization furnace from the discharging port.

[0031] A burner 16 is further arranged at the feeding port of the carbonization furnace, and the combustion outlet of the burner extends into the feeding port of the carbonization furnace through the feeding cover 43. The burner ignites the battery scraps at the feeding port of the carbonization furnace, and helps the battery scraps to burn quickly. Not shown in the figure.

[0032] The part of the carbonization furnace 1 between the rotating bearing frames 21 is provided with a temperature control mechanism 3, and the temperature control mechanism 3 includes a temperature control support 31, a temperature control cover 32 and a temperature adjusting structure; the temperature control cover 32 is arranged on the temperature control support 31, and the temperature control cover 32 is located between the rotating bearing frames 21; the carbonization furnace 1 extends through the temperature control cover 32 and rotates relative to the temperature control cover 32; the carbonization furnace is in sealing contact with the temperature control cover.

[0033] The inner wall of the temperature control cover 32 and the outer wall of the carbonization furnace 1 form a heat exchange cavity, and along the material conveying direction in the carbonization furnace 1, the heat exchange cavity has a first heat exchange sub-cavity, a second heat exchange sub-cavity and a third heat exchange sub-cavity; the first heat exchange sub-cavity is close to the feeding port of the carbonization furnace; the third heat exchange sub-cavity is close to the discharging port of the carbonization furnace; the first heat exchange sub-cavity, the second heat exchange sub-cavity and the third heat exchange sub-cavity are sequentially through and are an integral structure, and are only distinguished due to different temperatures.

[0034] The first heat exchange sub-cavity, the second heat exchange sub-cavity and the third heat exchange sub-cavity are each provided with a temperature adjusting structure, and the temperature adjusting structure includes an air cooling structure and a water cooling structure.

[0035] The air cooling structure includes a fan 4, an air inlet channel 5, an air inlet and an air outlet 7; the air outlet of the fan 4 communicates with the air inlet channel 5, and the air inlet channel 5 is provided with an air cooling electromagnetic valve; the air inlet channel 5 communicates with the air inlet, and the air inlet is arranged at the lower part of the temperature control cover 31; the air outlet 7 is arranged at the top of the temperature control cover 31; the air inlet channel 5, the air inlet, the heat exchange cavity and the air outlet form an air cooling and temperature reducing channel. A spoiler is arranged in the air inlet channel, and the air inlet channel uses a triangular channel, and the closer to the air inlet, the wider the channel; the spoiler divides the incoming cold air and makes it enter the heat exchange sub-cavities uniformly, and the cold air between adjacent heat exchange sub-cavities can have an overlapping area. The fan sends the cold air from the air inlet channel into the temperature control cover, and the cold air exchanges heat with the carbonization furnace from bottom to top, thereby reducing the temperature of the carbonization furnace, and the air after heat exchange is discharged from the air outlet.

[0036] The water cooling structure comprises a main water pipe 9, a branch water pipe 10, a spray head, an electromagnetic valve, a water tank 13 and a water pump 14; a main water pipe 9 is arranged on each side of the temperature control cover 31 corresponding to the heat exchange cavity; the main water pipe 9 is communicated with a plurality of branch water pipes 10; the upper side and the lower side of the main water pipe are both provided with branch water pipes.

[0037] A spray head is arranged on each branch water pipe 10 and inserted into the temperature control cover; an electromagnetic valve is arranged between the branch water pipe 10 and the spray head; a collecting drain port is arranged at the bottom of the temperature control cover; the collecting drain port is communicated with a drain pipe 12; the drain pipe 12 is connected to the water inlet of the water tank 13; the water outlet of the water tank 13 is communicated with the water inlet of the water pump 14; the water outlet of the water pump 14 is communicated with the main water pipe through a three-way pipe.

[0038] In order to reduce the high temperature by using a small amount of water to achieve energy saving and temperature control, the water cooling structures on the same side of the heat exchange cavity share a main water pipe.

[0039] Cold water is introduced into the main water pipe and then into each branch water pipe; the amount of water sprayed by the spray head is controlled by the electromagnetic valve; the sprayed water exchanges heat with the carbonization furnace from multiple angles in a ring shape; the water after heat exchange is drained from the collecting drain port and flows into the water tank; after being filtered, the cooling water in the water tank is pumped to the spray heads of each heat exchange sub-cavity for spraying.

[0040] In order to better control the temperature in the carbonization furnace in stages, a plurality of temperature sensors are installed in the carbonization furnace; at least one temperature sensor is arranged in the part of the carbonization furnace corresponding to the first heat exchange sub-cavity, the part of the carbonization furnace corresponding to the second heat exchange sub-cavity and the part of the carbonization furnace corresponding to the third heat exchange sub-cavity. The temperature sensor is an infrared temperature sensor. According to the detected temperature, the cold air valve and the cold water valve are automatically adjusted to change the amount of cold air and cold water introduced into each heat exchange sub-cavity, so as to control the temperature of different regions of the carbonization furnace, so that the temperature of the carbonization furnace along the material conveying direction gradually reaches the controllable range of the required temperature, and the temperature of the carbonization furnace along the material conveying direction is low first and then high again. Specifically, each temperature sensor is connected to a controller; the controller is connected to the electromagnetic valves of each water cooling structure; the controller is connected to each fan and each air cooling electromagnetic valve. The controller controls the corresponding fan to start and the corresponding electromagnetic valve and air cooling electromagnetic valve according to the detected temperature, so as to control the amount of water sprayed by each spray head and the amount of cold air input.

[0041] The carbonization furnace rotating mechanism drives the carbonization furnace to rotate in situ, battery scraps in the carbonization furnace are combusted and conveyed by a screw, the temperature of the carbonization furnace in the temperature control cover is changed by adjusting the temperature adjusting structure at the heat exchange cavity, the temperature of the carbonization furnace from the feeding end to the discharging end is low first, then high, and finally low, that is, the temperature of the carbonization furnace corresponding to the first heat exchange sub-cavity is low, the temperature of the carbonization furnace corresponding to the second heat exchange sub-cavity is the highest, and the temperature of the carbonization furnace corresponding to the third heat exchange sub-cavity is reduced, the temperature adjusting structure is used to realize the staged control of different regions of the carbonization furnace, and then the metal material in the broken material is not oxidized, the black powder on the surface of the metal material is removed, and the recyclability of the metal material is improved.

[0042] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A staged temperature-controlled lithium battery carbonization device, comprising a carbonization furnace (1) and a carbonization furnace rotating mechanism (2), the carbonization furnace (1) is obliquely arranged on the carbonization furnace rotating mechanism (2) and rotates in situ under the driving of the carbonization furnace rotating mechanism (2), characterized in that: The carbonization furnace (1) is provided with a temperature control mechanism (3), the temperature control mechanism (3) includes a temperature control support (31), a temperature control cover (32) and a temperature adjusting structure, the temperature control cover (32) is arranged on the temperature control support (31), the carbonization furnace (1) penetrates the temperature control cover (32) and rotates relative to the temperature control cover (32), the inner wall of the temperature control cover (32) and the outer wall of the carbonization furnace (1) form a heat exchange cavity, along the material conveying direction in the carbonization furnace (1), the heat exchange cavity has a first heat exchange sub-cavity, a second heat exchange sub-cavity and a third heat exchange sub-cavity in turn, the first heat exchange sub-cavity is close to the feed inlet of the carbonization furnace, the third heat exchange sub-cavity is close to the discharge port of the carbonization furnace, the first heat exchange sub-cavity, the second heat exchange sub-cavity and the third heat exchange sub-cavity are all provided with the temperature adjusting structure, and the temperature in the carbonization furnace corresponding to the second heat exchange sub-cavity is the highest. ​ 2. The staged temperature controlled lithium battery carbonization device of claim 1, wherein: The carbonization furnace rotating mechanism (2) includes a rotating bearing frame (21), a rotating motor and a rotating gear ring, the rotating bearing frame (21) is arranged at both ends of the carbonization furnace (1), and the temperature control cover (32) is located between the rotating bearing frames (21); the rotating gear ring is arranged on the outer wall of the carbonization furnace and is engaged with a driving gear on the output shaft of the rotating motor.

3. The staged temperature-controlled lithium battery carbonization device of claim 2, wherein: A feeding mechanism is arranged at the feed inlet of the carbonization furnace (1), the feeding mechanism includes a feeding support (41), a feeding hopper (42) and a feeding cover (43), the feed inlet of the carbonization furnace (1) extends into the feeding cover (43), and the carbonization furnace (1) rotates relative to the feeding cover, the feeding cover (43) is arranged on the feeding support (41), the discharge port of the feeding hopper (42) is fixed on the feeding cover (43) and communicates with the feed inlet of the carbonization furnace, and the feeding hopper (42) is provided with a fire prevention structure.

4. The staged temperature controlled lithium battery carbonization apparatus of claim 3, wherein: A combustion machine is further arranged at the feed inlet of the carbonization furnace, and the combustion outlet of the combustion machine extends into the feed inlet of the carbonization furnace through the feeding cover (43).

5. The staged temperature controlled lithium battery carbonization apparatus of any of claims 1-4, wherein: The temperature adjusting structure includes an air cooling structure and a water cooling structure.

6. The staged temperature controlled lithium battery carbonization apparatus of claim 5, wherein: The air cooling structure includes a fan (4), an air inlet channel (5), an air inlet and an air outlet (7), the air outlet of the fan (4) communicates with the air inlet channel (5), the air inlet channel (5) is provided with an air cooling electromagnetic valve, the air inlet channel (5) communicates with the air inlet, and the air inlet is arranged at the lower part of the temperature control cover (31), the air outlet (7) is arranged at the top of the temperature control cover (31), and the air inlet channel (5), the air inlet, the heat exchange cavity and the air outlet form an air cooling cooling channel.

7. The staged temperature controlled lithium battery carbonization apparatus of claim 6, wherein: The water cooling structure includes a main water pipe (9), a branch water pipe (10), a spray head, an electromagnetic valve, a water tank (13) and a water pump (14), one main water pipe (9) is arranged on each side of the temperature control cover (31) corresponding to the heat exchange cavity, a plurality of branch water pipes (10) are communicated on the main water pipe (9), one spray head is arranged on each branch water pipe (10), the spray head is inserted into the temperature control cover, an electromagnetic valve is arranged between the branch water pipe (10) and the spray head, a collecting drain port is arranged at the bottom of the temperature control cover, a drain pipe (12) is communicated with the collecting drain port, the drain pipe (12) is connected to the water inlet of the water tank (13), the water outlet of the water tank (13) communicates with the water inlet of the water pump (14), and the water outlet of the water pump (14) communicates with the main water pipe through a three-way pipe.

8. The staged temperature-controlled lithium battery carbonization device of claim 7, wherein: A plurality of temperature sensors are installed in the carbonization furnace corresponding to the temperature control cover (31).

9. The staged temperature controlled lithium battery carbonization device of claim 7, wherein: The carbonization furnace has a main conveying cavity (1-1), a necked conveying cavity (1-2) and a discharging cavity (1-3), the diameter of the discharging cavity (1-3) is smaller than that of the main conveying cavity (1-1); the inner wall of the main conveying cavity (1-1) is provided with a plurality of first spiral belts (1-4), each first spiral belt (1-4) is distributed in an annular array with the center axis of the main conveying cavity (1-1) as the center; the inner wall of the necked conveying cavity (1-2) is provided with a plurality of second spiral belts (1-5), each second spiral belt (1-5) is distributed in an annular array with the axis of the necked conveying cavity (1-2) as the center; the inner wall of the discharging cavity (1-3) is provided with a plurality of third spiral belts (1-6), each third spiral belt (1-6) is distributed in an annular array with the axis of the discharging cavity (1-3) as the center.

10. The staged temperature-controlled lithium battery carbonization device of claim 9, wherein: The second spiral belt (1-5) and the corresponding first spiral belt (1-4) are arranged in a staggered manner; the third spiral belt (1-6) and the corresponding second spiral belt (1-5) are arranged in a staggered manner.

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