Drying equipment for negative electrode material production

Abstract

The utility model discloses drying equipment for negative electrode material production, which relates to the technical field of negative electrode material drying and comprises a drying chamber and a feeding mechanism, a support is arranged on one side of the outside of the drying chamber, a servo motor is arranged above the support, a spiral auger is mounted on a rotating shaft, an air heater is arranged outside the drying chamber, and the feeding mechanism is arranged above the air heater. A feeding mechanism is arranged at the top end of the outer portion of the drying chamber and comprises a material barrel, a rotating rod is arranged in the material barrel, and a plurality of blades are evenly distributed on the outer wall of the rotating rod in the circumferential direction. According to the utility model, the negative electrode material is uniformly dried in the drying chamber through the cooperative work of the spiral auger and the drying chamber, and the spiral auger is arranged on the rotating shaft in the drying chamber and is driven to rotate by the servo motor through the driving wheel, the belt and the driven wheel, so that the negative electrode material is uniformly dried under the pushing of the spiral auger. And the device continuously turns over and moves in the drying chamber, so that the device is in full contact with hot air, and the drying efficiency and uniformity are improved.

Description

Technical Field

[0001] This utility model relates to the field of anode material drying technology, specifically to a drying equipment for anode material production. Background Technology

[0002] Anode materials are an important component of lithium-ion batteries, directly affecting key indicators such as energy density, cycle life, and safety performance. During the production process of anode materials, residual moisture and organic solvents can reduce the content of active materials, thereby affecting the energy density of the battery. Therefore, drying is a crucial step. Drying can retain the active components of the anode material to the maximum extent, improve the energy storage capacity per unit mass or volume, and thus enhance the overall energy density of the battery.

[0003] Existing drying equipment typically involves statically drying the negative electrode material by placing it in the drying chamber. Under static drying, the negative electrode material is difficult to disperse, resulting in uneven drying. This unevenness directly affects the final quality of the negative electrode material, thereby prolonging the drying time.

[0004] For example, the patented invention CN211204702U discloses a material drying device for the production of graphite anode material for lithium batteries. In this patent, the anode material is dried while stationary inside a box assembly. When the anode material is dried while stationary, it is prone to agglomeration inside the box assembly due to factors such as surface tension and electrostatic effects. Agglomerated material will hinder the uniform penetration of hot air, making it impossible for some material to fully contact the hot air, resulting in uneven drying. Agglomeration and uneven drying will lead to a decrease in key performance characteristics of the anode material, such as specific capacity and cycle stability, thus affecting the overall performance of the battery.

[0005] Therefore, it is necessary to invent a drying device for the production of negative electrode materials to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a drying device for the production of negative electrode materials, in order to solve the problem that the negative electrode materials are difficult to disperse during static drying, resulting in uneven drying. This unevenness directly affects the final quality of the negative electrode materials, thereby prolonging the drying time.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a drying device for producing negative electrode materials, comprising a drying chamber and a feeding mechanism. A support is provided on one side of the outer side of the drying chamber, and a servo motor is provided above the support. A rotating shaft is provided inside the drying chamber, and one end of the rotating shaft passes through the wall of the drying chamber and extends to the outside. A spiral auger is installed on the rotating shaft. A hot air blower is provided outside the drying chamber. A feeding mechanism is provided at the top of the outer side of the drying chamber. The feeding mechanism includes a material cylinder, and a rotating rod is provided inside the material cylinder. Multiple blades are evenly distributed around the outer wall of the rotating rod.

[0008] Preferably, the output end of the servo motor is provided with a drive wheel, and the end of the rotating shaft extending to the outside is provided with a driven wheel. A belt is tensioned on the drive wheel and the driven wheel. The servo motor drives the drive wheel, and then the power is transmitted to the driven wheel through the belt, thereby driving the rotating shaft and the auger to rotate.

[0009] Preferably, a feed hopper is provided above the spiral auger and is located on the top surface of the drying chamber. A discharge hopper is provided below the spiral auger and is located on the bottom surface of the drying chamber. The discharge hopper is designed in an inclined state. The spiral auger is used to transport the negative electrode material in the drying chamber, so that the negative electrode material continuously tumbles and moves inside the drying chamber, which improves its drying efficiency and uniformity. The inclined discharge hopper also helps the material to slide out smoothly.

[0010] Preferably, an air supply pipe is connected between the hot air blower and the drying chamber. The air inlet of the air supply pipe is connected to the air outlet of the hot air blower, and the air outlet of the air supply pipe runs through the top of the interior of the drying chamber. The hot air blower provides hot air to the interior of the drying chamber through the air supply pipe to achieve the drying of the negative electrode material.

[0011] Preferably, the top of the material cylinder is provided with a feed inlet and the bottom of the material cylinder is provided with a discharge outlet. The material cylinder is used to store negative electrode materials, and the feed inlet on it facilitates the addition of materials and realizes continuous material conveying.

[0012] Preferably, the discharge port is installed on the top surface of the feed hopper by multiple bolts, and the discharge port is connected to the feed hopper to ensure a tight connection between the feeding mechanism and the drying chamber.

[0013] Preferably, a support frame is provided on one side of the drying chamber, and a motor and a reducer are installed above the support frame. The output end of the motor is connected to the input end of the reducer. The motor drives the rotating rod to rotate through the reducer, thereby driving the blades in the material cylinder to work and realize the material conveying.

[0014] Preferably, the output end of the reducer is connected to a rotating rod, which extends axially through the entire length of the material cylinder from one end to the other, ensuring that the rotating rod can drive the blades inside the material cylinder to fully and evenly stir and transport the material.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. In this utility model, the negative electrode material is uniformly dried in the drying chamber by the coordinated work of the spiral auger and the drying chamber. The spiral auger is installed on the rotating shaft inside the drying chamber and is driven to rotate by a servo motor through the driving wheel, belt and driven wheel. This design makes the negative electrode material continuously turn and move in the drying chamber under the push of the spiral auger, so as to fully contact the hot air and improve the drying efficiency and uniformity.

[0017] 2. In this utility model, the feeding mechanism achieves orderly feeding, effectively avoiding the problem of material accumulation caused by feeding at one time. The motor drives the rotating rod to rotate through the reducer, which in turn drives the blades in the material cylinder to work, realizing continuous and orderly material conveying. This design allows the negative electrode material to be added to the drying chamber in the required amount, avoiding the problems of accumulation and uneven drying caused by feeding too much at one time, and improving the stability and reliability of the entire drying equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a three-dimensional cross-sectional structural diagram of the drying chamber of this utility model;

[0020] Figure 3 This is a front view schematic diagram of the drying chamber structure of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the hot air blower of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the feeding mechanism of this utility model;

[0023] Figure 6 This is a three-dimensional cross-sectional view of the material cylinder of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Drying chamber; 2. Feed hopper; 3. Support frame; 4. Servo motor; 5. Drive wheel; 6. Spiral auger; 7. Rotary shaft; 8. Driven wheel; 9. Belt; 10. Discharge hopper; 11. Hot air blower; 12. Air duct; 13. Feeding mechanism; 1301. Material cylinder; 1302. Feed inlet; 1303. Discharge outlet; 1304. Blade; 14. Support frame; 15. Electric motor; 16. Reducer; 17. Rotating rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] This utility model provides, for example Figure 1-6 The drying equipment for producing negative electrode materials shown includes a drying chamber 1 and a feeding mechanism 13. A support 3 is provided on one side of the outside of the drying chamber 1, and a servo motor 4 is provided above the support 3. A rotating shaft 7 is provided inside the drying chamber 1, and one end of the rotating shaft 7 passes through the wall of the drying chamber 1 and extends to the outside. A spiral auger 6 is installed on the rotating shaft 7. A hot air blower 11 is provided outside the drying chamber 1. A feeding mechanism 13 is provided at the top of the outside of the drying chamber 1. The feeding mechanism 13 includes a material cylinder 1301. A rotating rod 17 is provided inside the material cylinder 1301. Multiple blades 1304 are evenly distributed around the outer wall of the rotating rod 17.

[0028] In this embodiment, the feeding mechanism 13, through the design of the material cylinder 1301, the rotating rod 17 and the blade 1304, realizes the storage, stirring and continuous conveying of the negative electrode material. This design ensures that the material can be added to the drying chamber 1 evenly and continuously, thus improving the drying efficiency.

[0029] The output end of the servo motor 4 is equipped with a drive wheel 5, and the end of the shaft 7 extending to the outside is equipped with a driven wheel 8. A belt 9 is tensioned on the drive wheel 5 and the driven wheel 8. A feed hopper 2 is located above the spiral auger 6 and is located on the top surface of the drying chamber 1. A discharge hopper 10 is located below the spiral auger 6 and is located on the bottom surface of the drying chamber 1. The discharge hopper 10 is designed in an inclined state. An air supply pipe 12 is connected between the hot air blower 11 and the drying chamber 1. The air inlet end of the air supply pipe 12 is connected to the air outlet end of the hot air blower 11, and the air outlet pipe of the air supply pipe 12 passes through the top of the interior of the drying chamber 1.

[0030] In this embodiment, the design of servo motor 4, drive wheel 5, belt 9, driven wheel 8, and rotating shaft 7 achieves efficient power transmission. Servo motor 4 drives drive wheel 5 to rotate, and belt 9 transmits power to driven wheel 8, which in turn drives rotating shaft 7 and auger 6 to rotate. This allows the negative electrode material to continuously tumble and move inside drying chamber 1 under the push of auger 6. During this process, the negative electrode material comes into full contact with the hot air delivered into drying chamber 1 by hot air blower 11 through air duct 12, thereby significantly improving drying efficiency and uniformity. In addition, the unique design of auger 6 not only promotes uniform drying of negative electrode material but also enables smooth transport of dried material. The dried negative electrode material is transported to the discharge hopper 10 located at the bottom of drying chamber 1 under the continuous push of auger 6 and discharged smoothly, effectively avoiding the accumulation and retention of material in drying chamber 1 and ensuring the continuity and efficiency of the entire drying process.

[0031] The top of the material cylinder 1301 is provided with a feed inlet 1302, and the bottom of the material cylinder 1301 is provided with a discharge outlet 1303. The discharge outlet 1303 is installed on the top surface of the feed hopper 2 by multiple bolts and is connected to the feed hopper 2. A support frame 14 is provided on one side of the drying chamber 1. A motor 15 and a reducer 16 are installed on the top of the support frame 14. The output end of the motor 15 is connected to the input end of the reducer 16. The output end of the reducer 16 is connected to a rotating rod 17. The rotating rod 17 passes through the entire length of the material cylinder 1301 axially and extends from one end to the other.

[0032] In this embodiment, the material conveying path, through the design of the inlet 1302, the outlet 1303, and the feed hopper 2, realizes the continuous and orderly conveying of the negative electrode material. The motor 15 and the reducer 16 on the support frame 14 provide stable power support for the rotating rod 17. The motor 15 drives the rotating rod 17 to rotate through the reducer 16, thereby driving the blades 1304 in the material cylinder 1301 to convey the material, ensuring the normal operation of the feeding mechanism 13. This design avoids the problem of negative electrode material accumulating inside the drying chamber 1 and uneven drying caused by excessive feeding at one time.

[0033] Working principle of this utility model:

[0034] Refer to the instruction manual appendix Figure 1-6When using this utility model, firstly, turn on the hot air blower 11 to preheat the air supply pipe 12, so that the hot air reaches a suitable drying temperature. Then, add the negative electrode material into the material cylinder 1301 through the feed inlet 1302 at the top of the material cylinder 1301. Next, start the motor 15. The motor 15 drives the rotating rod 17 to rotate through the reducer 16. The rotating rod 17 drives the blades 1304 inside the material cylinder 1301 to work, realizing the stirring and initial conveying of the material. The stirred negative electrode material flows out through the discharge outlet 1303 at the bottom of the material cylinder 1301 and smoothly enters the feed hopper 2. The negative electrode material falls from the feed hopper 2 onto the spiral auger 6 in the drying chamber 1. At this time, start... A servo motor 4 drives the drive wheel 5 to rotate, and transmits power to the driven wheel 8 through the belt 9, which in turn drives the rotating shaft 7 and the screw conveyor 6 to rotate. The screw conveyor 6 continuously turns and moves the negative electrode material in the drying chamber 1, so that the material comes into full contact with the hot air sent into the drying chamber 1 by the hot air blower 11 through the air pipe 12, achieving uniform drying. The dried negative electrode material is conveyed to the discharge hopper 10 located at the bottom of the drying chamber 1 under the continuous push of the screw conveyor 6. Since the discharge hopper 10 is designed in an inclined state, the dried negative electrode material can be smoothly discharged from the discharge hopper 10, avoiding accumulation and retention in the drying chamber 1.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying device for producing negative electrode materials, comprising a drying chamber (1) and a feeding mechanism (13), characterized in that: A support (3) is provided on one side of the outside of the drying chamber (1), and a servo motor (4) is provided above the support (3). A rotating shaft (7) is provided inside the drying chamber (1), and one end of the rotating shaft (7) passes through the wall of the drying chamber (1) and extends to the outside. A spiral auger (6) is installed on the rotating shaft (7). A hot air blower (11) is provided outside the drying chamber (1). A feeding mechanism (13) is provided at the top of the outside of the drying chamber (1). The feeding mechanism (13) includes a material cylinder (1301). A rotating rod (17) is provided inside the material cylinder (1301). Multiple blades (1304) are evenly distributed around the outer wall of the rotating rod (17).

2. The drying equipment for producing negative electrode materials according to claim 1, characterized in that: The output end of the servo motor (4) is provided with a drive wheel (5), and the end of the rotating shaft (7) extending to the outside is provided with a driven wheel (8). A belt (9) is tensioned on the drive wheel (5) and the driven wheel (8).

3. The drying equipment for producing negative electrode materials according to claim 1, characterized in that: A feed hopper (2) is provided above the spiral auger (6) and is located on the top surface of the drying chamber (1). A discharge hopper (10) is provided below the spiral auger (6) and is located on the bottom surface of the drying chamber (1). The discharge hopper (10) is designed in an inclined state.

4. The drying equipment for producing negative electrode materials according to claim 3, characterized in that: An air supply pipe (12) is connected between the hot air blower (11) and the drying chamber (1). The air inlet of the air supply pipe (12) is connected to the air outlet of the hot air blower (11), and the air outlet of the air supply pipe (12) passes through the top of the interior of the drying chamber (1).

5. A drying device for producing negative electrode materials according to claim 1, characterized in that: The top of the material cylinder (1301) is provided with a feed inlet (1302), and the bottom of the material cylinder (1301) is provided with a discharge outlet (1303).

6. The drying equipment for producing negative electrode materials according to claim 5, characterized in that: The discharge port (1303) is installed on the top surface of the feed hopper (2) by multiple bolts, and the discharge port (1303) is connected to the feed hopper (2).

7. The drying equipment for producing negative electrode materials according to claim 1, characterized in that: A support frame (14) is provided on one side of the drying chamber (1). A motor (15) and a reducer (16) are installed above the support frame (14). The output end of the motor (15) is connected to the input end of the reducer (16).

8. A drying device for producing negative electrode materials according to claim 7, characterized in that: The output end of the reducer (16) is connected to a rotating rod (17), which extends axially through the entire length of the material cylinder (1301) from one end to the other.

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