Preparation method of lithium ion battery negative electrode material

Abstract

The invention relates to the field of preparation of lithium ion battery negative electrode materials, in particular to a preparation method of a lithium ion battery negative electrode material. The invention aims to provide the preparation method of the lithium ion battery negative electrode material, and the preparation method has the beneficial effects that in the preparation stage of the lithium ion battery negative electrode material, the blanking amount of powder in a ton bag is convenient to control, so that excessive outflow of the powder stored in the ton bag due to overlarge volume is prevented. According to the technical scheme, the preparation device of the lithium ion battery negative electrode material comprises a supporting frame, a lead screw rotationally connected to the rear side of the top of the supporting frame and a sliding rod fixedly connected to the front side of the top of the supporting frame, a transverse moving frame is in transmission connection with the lead screw on the lead screw, and the front side of the top of the transverse moving frame is in sliding connection with the sliding rod; the middle of the transverse moving frame is fixedly connected with a ton bag, and the bottom of the ton bag is fixedly communicated with a plurality of circulating pipes.

Description

Technical Field

[0001] This invention relates to the field of lithium-ion battery anode material preparation, and more specifically to a method for preparing lithium-ion battery anode materials. Background Technology

[0002] In the preparation stage of lithium-ion battery anode materials, ton bags serve as the core container for powder storage and transfer, and the control of their discharge volume directly affects production continuity and material utilization. Currently, the industry mostly uses manual opening of the ton bag discharge port or simple valves to control the discharge, which, due to the lack of a precise control mechanism, is prone to sudden increases in the discharge volume.

[0003] When the volume of the ton bag is too large, the powder inside is subjected to both gravity and stacking pressure, which can easily cause a surge during the initial unloading stage, leading to excessive powder outflow. Current technology has not yet effectively solved this key problem. It is not suitable for controlling the amount of powder falling from the ton bag during the preparation stage of lithium-ion battery anode materials, thus preventing excessive powder outflow due to the large volume of the ton bag. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing lithium-ion battery anode materials. The beneficial effect is that during the preparation stage of lithium-ion battery anode materials, it is easier to control the amount of powder falling into the ton bag, thereby preventing excessive powder from flowing out of the ton bag due to its large volume.

[0005] The objective of this invention is achieved through the following technical solution: a preparation apparatus for lithium-ion battery negative electrode material, comprising a support frame, a lead screw rotatably connected to the rear top of the support frame, and a slide rod fixedly connected to the front top of the support frame. A transverse frame is connected to the lead screw via a lead screw drive. The front top of the transverse frame is slidably connected to the slide rod. A ton bag is fixedly connected to the middle of the transverse frame. The bottom of the ton bag is fixedly connected to and connected to multiple flow pipes. A horizontal frame is fixedly connected to the front and rear sides of the transverse frame, and a push rod is slidably connected to each horizontal frame. A pressing seat is fixedly connected to each push rod.

[0006] The top four corners and the bottom of the ton bag are all fixed to the transverse frame with bolts.

[0007] Multiple flow tubes are distributed at equal intervals.

[0008] Mirroring settings for two horizontal frames.

[0009] Each of the two pressing seats has a rubber pad fixedly wrapped around one of its adjacent sides.

[0010] A method for preparing lithium-ion battery anode materials using the above-described apparatus includes the following steps:

[0011] S1: Store the powder used to prepare lithium-ion battery anode materials into ton bags;

[0012] S2: The ton bag is moved laterally by the horizontal shifting frame, and the powder is circulated through the flow tube at the bottom of the ton bag to align with the container;

[0013] S3: The lower half of the ton bag is clamped by the pressing seats on both sides of the transverse frame to separate the internal powder.

[0014] S4: Use multiple long strips to periodically stir the powder stored in the ton bag. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0016] Figure 1 This is a partial structural schematic diagram of the support frame of the present invention;

[0017] Figure 2 This is a partial structural schematic diagram of the transverse moving frame of the present invention;

[0018] Figure 3 This is a partial structural schematic diagram of the flow tube of the present invention;

[0019] Figure 4 This is a partial structural schematic diagram of the horizontal frame of the present invention;

[0020] Figure 5 This is a partial structural schematic diagram of the pressing base of the present invention;

[0021] Figure 6 This is a partial structural schematic diagram of the tripod of the present invention;

[0022] Figure 7 This is a partial structural schematic diagram of the vertical rod of the present invention;

[0023] Figure 8 and Figure 9 These are all schematic diagrams of the overall structure of the present invention;

[0024] In the diagram: support frame 101; lead screw 102; arching frame 103; lifting frame 104; sliding rod 105; horizontal moving frame 201; ton bag 202; flow pipe 203; horizontal frame 301; push rod 302; pressing seat 303; triangular frame 401; vertical rod 402; disc 403; long strip plate 404; short rod 405. Detailed Implementation

[0025] An apparatus for preparing a lithium-ion battery negative electrode material includes a support frame 101, a lead screw 102 rotatably connected to the rear top of the support frame 101, and a slide rod 105 fixedly connected to the front top of the support frame 101. A transverse frame 201 is connected to the lead screw 102 via a lead screw drive. The front top of the transverse frame 201 is slidably connected to the slide rod 105. A ton bag 202 is fixedly connected to the middle of the transverse frame 201. A plurality of flow tubes 203 are fixedly connected to the bottom of the ton bag 202. A horizontal frame 301 is fixedly connected to the front and rear sides of the transverse frame 201, and a push rod 302 is slidably connected to each horizontal frame 301. A pressing seat 303 is fixedly connected to each push rod 302.

[0026] This section is based on Figure 1-5 and Figure 8 , Figure 9 The embodiment described herein is as follows: In the preparation stage of lithium-ion battery negative electrode material, in order to facilitate the control of the amount of powder falling into the ton bag, thereby preventing excessive powder outflow due to the excessive volume of the ton bag, the transported powder is stored in the ton bag 202, which is bolted to the middle of the transverse frame 201, and the powder in the ton bag 202 can flow out evenly from multiple flow pipes 203 at the bottom of the ton bag 202. The container for holding the powder is placed in the middle of the inner side of the support frame 101. The output shaft of a geared motor is fixedly connected to the right side of the lead screw 102 via a coupling. The geared motor is bolted to the top right side of the support frame 101, driving the geared motor to rotate the lead screw 102. When the lead screw 102 rotates, the transverse frame 201, which is connected to the lead screw, moves laterally on the upper side of the support frame 101 with the slide rod 105 as the lateral movement limit, synchronously driving the ton bag 202, which is bolted to the middle of the transverse frame 201, to move laterally. The ton bag 202 is movable, allowing multiple flow tubes 203 at the bottom of the bag to be aligned with the equipment for flow. However, since the ton bag 202 often contains a large amount of powder, the amount poured out at one time should not be too large. Therefore, a horizontal frame 301 is welded and fixedly connected to the front and rear sides below the horizontal frame 201. A hydraulic cylinder is fixedly connected to the middle of the rear side of each horizontal frame 301, so that the movable end of each hydraulic cylinder is fixedly connected to the middle of two push rods 302. At this time, the two hydraulic cylinders are driven, so that the two push rods 302 push the pressing seat 303 towards the lower middle part of the ton bag 202. Thus, the two pressing seats 303 gradually press the middle part of the ton bag 202, causing the powder in the ton bag 202 to be segmented. The powder below the pressing point flows out evenly, while the powder above the pressing point remains inside the ton bag 202. This effectively controls the amount of powder falling into the ton bag, thereby preventing the excessive amount of powder stored inside the ton bag from flowing out due to its large volume.

[0027] The top four corners and bottom of the ton bag 202 are bolted to the horizontal moving frame 201. Multiple flow pipes 203 are evenly spaced. This part is based on... Figure 1-5 and Figure 8 , Figure 9 The embodiment described herein is such that multiple flow tubes 203 located at the bottom of the ton bag 202 are equally spaced to facilitate uniform internal powder flow and multi-directional flow.

[0028] The two horizontal supports 301 are mirror-mounted. A rubber pad is fixedly wrapped around each adjacent side of the two pressing bases 303. This part is based on... Figure 1-5 and Figure 8 , Figure 9 The embodiment described herein is as follows: When the lower half of the ton bag 202 is clamped by the pressing seats 303 on both sides, in order to prevent the surface of the pressing seat 303 from directly contacting the surface of the ton bag 202 and causing wear, a rubber pad is adhered and fixedly wrapped on each surface of the pressing seat 303 that contacts the ton bag 202, thereby preventing the surface of the pressing seat 303 from directly contacting the surface of the ton bag 202 and causing wear, and improving the sealing performance when clamping the ton bag 202.

[0029] An arched frame 103 is fixedly connected to the front and rear sides of the top of the support frame 101. The middle part of the front arched frame 103 is fixedly connected to the slide rod 105, and the middle part of the rear arched frame 103 is rotatably connected to the lead screw 102.

[0030] A lifting frame 104 is slidably connected to the upper middle part of the two arched frames 103. A tripod 401 is fixedly connected to the middle left side of the lifting frame 104. Multiple vertical rods 402 are rotatably connected to the bottom of the tripod 401. A disc 403 is fixedly connected to the bottom of each vertical rod 402. Multiple long strips 404 are fixedly connected to each disc 403 along the circumferential direction.

[0031] Each long strip 404 has multiple elongated holes evenly distributed on its upper and lower sides. A short rod 405 is rotatably connected to the rear middle part of the tripod 401. A pulley is fixedly connected to the middle of the short rod 405 and the top of each vertical rod 402. Multiple pulleys are fixedly connected by a belt.

[0032] This section is based on Figures 1-9 The embodiment described herein is as follows: when the transverse frame 201 moves laterally due to the drive of the lead screw 102 and the sliding limit of the slide rod 105, the two arched frames 103 provide a central support for the middle part of the lead screw 102 and the slide rod 105 respectively, so as to prevent the weight of the ton bag 202 in the middle of the transverse frame 201 from being too large and causing pressure on the middle part of the lead screw 102 and the slide rod 105, thereby improving the overall operational stability of the device;

[0033] When clamping the middle of the ton bag 202 to segment the internal powder, to facilitate adequate and adaptive agitation of the powder in the upper half of the ton bag 202, prevent powder accumulation due to prolonged storage affecting subsequent flow, and provide a working basis for subsequent deep agitation, a second motor output shaft is fixedly connected to the upper side of the short rod 405 via a coupling. The second motor is bolted to the tripod 401, driving the short rod 405 to rotate. Furthermore, through the transmission of pulleys and belts, multiple vertical rods 402 rotate synchronously. As the multiple vertical rods 402 rotate, the disc 403 at the bottom of each vertical rod 402 rotates, causing multiple long strips 404 fixedly connected to the circumference of each disc 403 to perform circular motion, thus agitating the powder. The powder inside bag 202 is agitated to prevent it from piling up and sticking together after prolonged storage. Multiple long strips 404 are pre-stirred to agitate the powder. Therefore, a second hydraulic cylinder is fixedly connected to the right side of the lifting frame 104 via a flange. The fixed end of the second hydraulic cylinder is fixedly connected to the top right side of the support frame 101 via a flange. Driving the second hydraulic cylinder causes the lifting frame 104 to move up and down, extending the multiple long strips 404 below the triangular frame 401 into the powder. The elongated holes on each long strip 404 enhance the agitation of the powder, facilitating thorough and adaptive agitation of the powder in the upper part of the ton bag 202. This prevents powder accumulation due to prolonged storage, which could affect subsequent processing. Furthermore, the pre-stirring of the powder provides a foundation for subsequent deep agitation.

[0034] A method for preparing lithium-ion battery anode materials using the above-described apparatus includes the following steps:

[0035] S1: Store the powder used to prepare lithium-ion battery anode materials into ton bag 202;

[0036] S2: The ton bag 202 is moved laterally by the transverse frame 201 and aligned with the container to allow the powder to flow through the flow pipe 203 at the bottom of the ton bag 202;

[0037] S3: The lower half of the ton bag 202 is clamped by the pressing seats 303 on both sides of the transverse frame 201 to separate the internal powder material.

[0038] S4: Use multiple long strips 404 to periodically stir the powder stored in the ton bag 202.

Claims

1. A preparation device of lithium ion battery negative electrode material, comprising a support frame (101) and a lead screw (102) rotatably connected to the rear side of the top of the support frame (101) and a slide bar (105) fixedly connected to the front side of the top of the support frame (101), characterized in that: The cross-moving frame (201) is in transmission connection with the lead screw (102), the top front side of the cross-moving frame (201) is in sliding connection with the slide rod (105), the middle part of the cross-moving frame (201) is fixedly connected with the ton bag (202), the bottom of the ton bag (202) is fixedly connected with a plurality of flow pipes (203), the front and rear sides of the cross-moving frame (201) are respectively fixedly connected with a horizontal frame (301), each horizontal frame (301) is respectively in sliding connection with a push rod (302), and each push rod (302) is respectively fixedly connected with a pressing seat (303).

2. The apparatus of claim 1, wherein: The top four corners of the ton bag (202) and the bottom of the ton bag (202) are fixedly connected to the cross-moving frame (201) through bolts.

3. The apparatus of claim 2, wherein: The plurality of flow pipes (203) are arranged at equal intervals.

4. The apparatus of claim 3, wherein: The two horizontal frames (301) are mirror images.

5. The apparatus of claim 4, wherein: The adjacent sides of the two pressing seats (303) are respectively wrapped with a rubber pad.

6. The apparatus of claim 1, wherein: The top front and rear sides of the support frame (101) are respectively fixedly connected with an arched frame (103), the middle part of the front arched frame (103) is fixedly connected with the slide rod (105), and the middle part of the rear arched frame (103) is rotatably connected with the lead screw (102).

7. The apparatus of claim 6, wherein: The middle part of the two arched frames (103) is slidably connected with a lifting frame (104), the left middle part of the lifting frame (104) is fixedly connected with a triangular frame (401), the bottom of the triangular frame (401) is rotatably connected with a plurality of vertical rods (402), the bottom of each vertical rod (402) is respectively fixedly connected with a disc (403), and each disc (403) is fixedly connected with a plurality of long strip plates (404) in the circumferential direction.

8. The apparatus of claim 7, wherein: The upper and lower sides of each long strip plate (404) are uniformly provided with a plurality of long strip holes.

9. The apparatus of claim 8, wherein: The middle part of the triangular frame (401) is rotatably connected with a short rod (405), the middle part of the short rod (405) and the top of each vertical rod (402) are fixedly connected with a belt wheel, and the plurality of belt wheels are fixedly connected through a belt.

10. A method of producing a negative electrode material for a lithium-ion battery by the apparatus according to any one of claims 1 to 9, characterized by: The method comprises the following steps, S1: storing the powder for preparing the negative electrode material of the lithium ion battery into the ton bag (202); S2: driving the ton bag (202) to move horizontally through the cross-moving frame (201), and aligning the container to flow the powder through the flow pipes (203) at the bottom of the ton bag (202); S3: clamping the lower half of the ton bag (202) through the pressing seats (303) on the two sides of the cross-moving frame (201) to separate the internal powder; S4: periodically stirring the powder stored in the ton bag (202) by using the plurality of long strip plates (404).

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