Low-temperature heat treatment device for preparing hard carbon negative electrode material of sodium-ion battery

Abstract

The utility model discloses a low-temperature heat treatment device for preparing a hard carbon cathode material of a sodium ion battery, which comprises a treatment box, a box door movably connected to the front side of the treatment box, two heating plates which are in mirror symmetry up and down are connected in the treatment box in a lifting manner, the two heating plates are provided with a rectangular frame II, and the rectangular frame II is fixedly connected in the treatment box. A notch is formed in the front side of the second rectangular frame, a through groove penetrates through the rear side of the second rectangular frame, a groove is formed in the inner side of each notch, two U-shaped clamping plates in up-down mirror symmetry are jointly connected between the grooves and the through groove in a telescopic mode, and two temperature measuring pieces in up-down mirror symmetry are movably connected into the second rectangular frame. The second rectangular frame is arranged between the two heating plates, and the two U-shaped clamping plates which are in mirror symmetry up and down are arranged in the second rectangular frame, so that the two faces of the material are heated at low temperature at the same time, the heat dissipation area of the material is increased, and the material is heated more evenly.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and in particular to a low-temperature heat treatment device for preparing hard carbon anode materials for sodium-ion batteries. Background Technology

[0002] Hard carbon anode materials refer to materials with graphite as the main component. Compared with traditional graphite anode materials, they have higher specific capacity and longer cycle life. Low-temperature heat treatment of hard carbon can improve the mechanical properties, microstructure and chemical composition of anode materials, and improve corrosion resistance, hardness, toughness, as well as battery quality, life and conductivity.

[0003] Patent publication number CN221666615U discloses a low-temperature heat treatment device for preparing hard carbon anode materials for sodium-ion batteries. The device includes a housing, with a rectangular platform rotatably mounted at the center of the housing. A geared motor is mounted on one outer wall of the housing to drive the rectangular platform's rotation. Heating plates are slidably mounted on the top and bottom of the housing. Gear adjustment mechanisms for driving the heating plates to rise and fall are installed inside the housing on the outer wall of the heating plates away from the rectangular platform. A second geared motor is mounted on one outer wall of the housing to drive one of the gear adjustment mechanisms. A power transmission mechanism is mounted at the end of the gear adjustment mechanism away from the inner wall of the housing. A belt drive structure for power connection is installed between the two power transmission mechanisms. This invention can not only control the heating temperature but also accurately measure the heating temperature of the hard carbon anode material at every moment.

[0004] In this patent, when fixing the hard carbon anode material, the material is fixed on a rectangular platform, while the heating plate is set on the upper and lower sides of the shell. When the heating plate heats the material at a low temperature, it can only heat the outside of the material, while the contact surface between the material and the rectangular platform cannot be heated by the heating plate, which reduces the heating area of ​​the material and easily leads to uneven heating of the material. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a low-temperature heat treatment device for preparing hard carbon anode materials for sodium-ion batteries.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a low-temperature heat treatment device for preparing hard carbon negative electrode material for sodium-ion batteries, comprising a treatment box, a door movably connected to the front side of the treatment box, two vertically mirror-symmetrical heating plates connected vertically inside the treatment box, a rectangular frame II provided for the two heating plates, the rectangular frame II being fixedly connected inside the treatment box, a notch opened on the front side of the rectangular frame II, a through groove on the rear side of the rectangular frame II, a groove opened on the inner side of each of the two notches, two vertically mirror-symmetrical U-shaped clamps connecting the grooves and the through groove together, and two vertically mirror-symmetrical temperature measuring elements movably connected inside the rectangular frame II.

[0007] As a further description of the above technical solution: The processing box is provided with two symmetrical rectangular frames, one upper and one lower, each rectangular frame having a heating plate fixed inside. One side of the top surface of the two rectangular frames has a threaded hole, the threads of the two threaded holes are opposite in direction, and a screw rod is threaded through the two threaded holes. One end of the screw rod is rotatably connected to the bottom wall of the processing box, and the other end rotatably passes through the processing box. A drive motor connected to the screw rod is vertically fixed to the top surface of the processing box. The other side of the top surface of the two rectangular frames has a guide hole, and a guide rod is movably connected through the two guide holes. The guide rod is vertically fixed inside the processing box.

[0008] As a further description of the above technical solution: a guide post is vertically fixed to the end face of the U-shaped clamp, the guide post slides axially through the groove, a cylinder is vertically fixed to the end face of the second rectangular frame, the output end of the cylinder is connected to the end of the guide post, and multiple protrusions are fixedly connected to the opposite sides of the two U-shaped clamps.

[0009] As a further description of the above technical solution: the inner wall of the groove has two vertically mirror-symmetrical sliding grooves, each of which is slidably connected to a slider, and each of the sliders is fixedly connected to a U-shaped clamp.

[0010] As a further description of the above technical solution: the temperature measuring element includes a driving element fixed outside the U-shaped clamp, a guide block is movably connected to the outside of the driving element, and a temperature sensor is vertically fixed to the end face of the guide block.

[0011] As a further description of the above technical solution: the driving component includes two support blocks that are mirror-fixed to the outside of the U-shaped clamp. A second drive motor is horizontally fixed to the side of one of the support blocks. The output end of the second drive motor is connected to a second screw. The second screw rotates through one of the support blocks and is rotatably connected to the inside of the other support block. A guide block is threaded onto the outer edge of the second screw. A second guide rod is horizontally movable through the side of the guide block. The second guide rod is horizontally fixed between the two support blocks.

[0012] As a further description of the above technical solution: the two temperature sensors are oriented opposite each other, and the bottom surface of the upper temperature sensor is flush with the bottom surface of the upper protrusion, and the top surface of the lower temperature sensor is flush with the top surface of the lower protrusion, wherein the protrusion is made of rubber.

[0013] This utility model has the following beneficial effects:

[0014] Compared with existing technologies, this low-temperature heat treatment device for preparing sodium-ion battery hard carbon anode material uses a rectangular frame two placed between two heating plates. Inside the rectangular frame two, two U-shaped clamps with mirror-symmetrical arrangement are placed, so that the hard carbon anode material is suspended and clamped between the two U-shaped clamps. This allows the lower heating plate to heat the bottom surface of the material at a low temperature, while the upper heating plate heats the top surface of the material. This simultaneous low-temperature heating of both sides of the material increases the heating area and makes the material heat more uniformly. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall structure of a low-temperature heat treatment device for preparing hard carbon anode material for sodium-ion batteries according to the present invention.

[0016] Figure 2 This is a three-dimensional view of the internal structure of the processing box of a low-temperature heat treatment device for preparing hard carbon anode material for sodium-ion batteries, as proposed in this utility model.

[0017] Figure 3 A three-dimensional view of the rectangular frame 2, which is the overall structure of a low-temperature heat treatment device for preparing hard carbon anode material for sodium-ion batteries proposed in this utility model.

[0018] Figure 4 This is a partial sectional view of the connection between the rectangular frame 2 and the U-shaped clamping plate of a low-temperature heat treatment device for preparing hard carbon anode material for sodium-ion batteries according to this utility model.

[0019] Legend:

[0020] 1. Processing box; 2. Drive motor one; 3. Box door; 4. Heating plate; 5. Rectangular frame one; 6. Rectangular frame two; 7. Threaded hole; 8. Screw one; 9. Groove; 10. U-shaped clamp; 11. Cylinder; 12. Notch; 13. Support block; 14. Screw two; 15. Guide rod two; 16. Drive motor two; 17. Guide block; 18. Temperature sensor; 19. Through slot; 20. Protrusion; 21. Guide post; 22. Slide groove; 23. Slider. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1 to 4 This utility model provides a low-temperature heat treatment device for preparing hard carbon anode materials for sodium-ion batteries: It includes a treatment chamber 1, with a door 3 movably connected to the front of the treatment chamber 1. Two vertically mirror-symmetrical heating plates 4 are vertically connected inside the treatment chamber 1. Each heating plate 4 has a rectangular frame 6, which is fixedly connected inside the treatment chamber 1. A notch 12 is opened on the front of the rectangular frame 6, and a through groove 19 is opened on the rear of the rectangular frame 6. A groove 9 is opened inside each of the two notches 12. Two vertically mirror-symmetrical U-shaped clamps 10 are telescopically connected between the grooves 9 and the through grooves 19. A guide post 21 is vertically fixed to the end face of the clamping plate 10. The guide post 21 slides axially through the groove 9. A cylinder 11 is vertically fixed to the end face of the rectangular frame 2 (6). The output end of the cylinder 11 is connected to the end of the guide post 21. Multiple protrusions 20 are fixedly connected to the opposite sides of the two U-shaped clamping plates 10. Two vertically mirror-symmetrical sliding grooves 22 are opened on the inner wall of the groove 9. A slider 23 is slidably connected in each sliding groove 22. A U-shaped clamping plate 10 is fixedly connected to the outside of each slider 23. Two vertically mirror-symmetrical temperature measuring elements are movably connected in the rectangular frame 2 (6).

[0023] The temperature measuring component includes a driving component fixed to the outside of the U-shaped clamp 10. A guide block 17 is movably connected to the outside of the driving component. A temperature sensor 18 is vertically fixed to the end face of the guide block 17. The two temperature sensors 18 face each other. The bottom surface of the upper temperature sensor 18 is flush with the bottom surface of the upper protrusion 20, and the top surface of the lower temperature sensor 18 is flush with the top surface of the lower protrusion 20. The protrusion 20 is made of rubber.

[0024] The driving component includes two support blocks 13 fixed to the outside of the U-shaped clamp 10. A drive motor 16 is horizontally fixed to the side of one of the support blocks 13. The output end of the drive motor 16 is connected to a screw 14. The screw 14 rotates through one of the support blocks 13 and is rotatably connected to the inside of the other support block 13. A guide block 17 is threaded onto the outer edge of the screw 14. A guide rod 15 is horizontally movable through the side of the guide block 17. The guide rod 15 is horizontally fixed between the two support blocks 13.

[0025] The processing box 1 has two symmetrical rectangular frames 5, one above the other. Each rectangular frame 5 has a heating plate 4 fixed inside. The top surface of one side of the two rectangular frames 5 has threaded holes 7. The threads of the two threaded holes 7 are opposite in direction. A screw 8 is threaded through the two threaded holes 7. One end of the screw 8 is rotatably connected to the bottom wall of the processing box 1, and the other end is rotatably connected through the processing box 1. A drive motor 2, which is connected to the screw 8, is vertically fixed on the top surface of the processing box 1. The top surface of the other side of the two rectangular frames 5 has guide holes. A guide rod 1 is movably connected through the two guide holes. The guide rod 1 is vertically fixed inside the processing box 1. The screw 8 is rotatably connected through one side of the rectangular frame 6. The guide rod 1 is fixedly connected to the other side of the rectangular frame 6.

[0026] By setting a rectangular frame 2 6 between two heating plates 4, and setting two U-shaped clamping plates 10 with mirror-symmetric upper and lower dimensions inside the rectangular frame 2 6, the hard carbon negative electrode material is suspended and clamped between the two U-shaped clamping plates 10. This allows the lower heating plate 4 to heat the bottom surface of the material at a low temperature, and the upper heating plate 4 to heat the top surface of the material. This simultaneous low-temperature heating of both sides of the material increases the heating area of ​​the material and makes the material heat up more evenly.

[0027] Working principle: In use, open the chamber door 3, insert the hard carbon negative electrode material to be heated through the notch 12 into the groove 9 between the two U-shaped clamps 10, and then the two pairs of cylinders 11 drive the two U-shaped clamps 10 to move relative to each other, clamping and fixing the material between the protrusions 20, so that the distance between the upper and lower surfaces of the material and the two heating plates 4 is equal, and the two temperature sensors 18 are in contact with the upper and lower sides of the material respectively. Then close the chamber door 3, and the heating plates 4 heat the material at a low temperature. At the same time, drive motor 2 16 drives screw 2 14 to rotate. Screw 2 14 drives guide block 17 to move laterally. The two guide blocks 17 drive the two temperature sensors 18 to move laterally on the upper and lower surfaces of the material to detect the temperature on the upper and lower surfaces of the material. When the temperature of the material is detected to be too high, drive motor 1 2 drives screw 1 8 to rotate. Screw 1 8 drives two rectangular frames 1 5 to move in the opposite direction. Rectangular frames 1 5 drive two heating plates 4 to move in the opposite direction, adjusting the height between the two heating plates 4 and the upper and lower surfaces of the material.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries, comprising a treatment chamber (1), wherein a chamber door (3) is movably connected to the front side of the treatment chamber (1), characterized in that: The processing box (1) is connected to two vertically mirror-symmetrical heating plates (4). Each heating plate (4) has a rectangular frame (6). The rectangular frame (6) is fixedly connected inside the processing box (1). The front side of the rectangular frame (6) has a notch (12). The rear side of the rectangular frame (6) has a through groove (19). The inner side of each of the two notches (12) has a groove (9). The groove (9) and the through groove (19) are connected together by two vertically mirror-symmetrical U-shaped clamps (10). The rectangular frame (6) is movably connected to two vertically mirror-symmetrical temperature measuring elements.

2. The low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries according to claim 1, characterized in that: The processing box (1) is provided with two symmetrical rectangular frames (5) with upper and lower casings. Each of the rectangular frames (5) has a heating plate (4) fixed in it. The top surface of one side of the two rectangular frames (5) has a threaded hole (7) through it. The threads of the two threaded holes (7) are opposite in direction. A screw rod (8) is threaded through the two threaded holes (7). One end of the screw rod (8) is rotatably connected to the bottom wall of the processing box (1), and the other end is rotatably connected through the processing box (1). A drive motor (2) that is connected to the screw rod (8) is vertically fixed on the top surface of the processing box (1). The top surface of the other side of the two rectangular frames (5) has a guide hole through it. A guide rod is movably connected through the two guide holes. The guide rod is vertically fixed inside the processing box (1).

3. The low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries according to claim 1, characterized in that: A guide post (21) is vertically fixed to the end face of the U-shaped clamp (10), and the guide post (21) slides axially through the groove (9). A cylinder (11) is vertically fixed to the end face of the rectangular frame (6), and the output end of the cylinder (11) is connected to the end of the guide post (21). Multiple protrusions (20) are fixedly connected to the opposite sides of the two U-shaped clamps (10).

4. The low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries according to claim 1, characterized in that: The inner wall of the groove (9) has two vertically mirror-symmetrical sliding grooves (22), each of which is slidably connected to a slider (23), and each of the sliders (23) is fixedly connected to a U-shaped clamp (10).

5. The low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries according to claim 1, characterized in that: The temperature measuring element includes a driving element fixed outside the U-shaped clamp (10), and a guide block (17) is movably connected to the outside of the driving element. A temperature sensor (18) is vertically fixed to the end face of the guide block (17).

6. The low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries according to claim 5, characterized in that: The driving component includes two support blocks (13) mirror-fixed to the outside of the U-shaped clamp (10). A second drive motor (16) is horizontally fixed to the side of one of the support blocks (13). The output end of the second drive motor (16) is connected to a second screw (14). The second screw (14) rotates through one of the support blocks (13) and is rotatably connected to the inside of the other support block (13). A guide block (17) is threaded onto the outer edge of the second screw (14). A second guide rod (15) is horizontally movable through the side of the guide block (17). The second guide rod (15) is horizontally fixed between the two support blocks (13).

7. The low-temperature heat treatment apparatus for preparing hard carbon anode material for sodium-ion batteries according to claim 5, characterized in that: The two temperature sensors (18) face each other, and the bottom surface of the upper temperature sensor (18) is flush with the bottom surface of the upper protrusion (20), and the top surface of the lower temperature sensor (18) is flush with the top surface of the lower protrusion (20). The protrusion (20) is made of rubber.

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