Preparation Device for Battery Electrode and Preparation Method for Battery Electrode

Abstract

The present invention relates to the technical field of batteries, and more specifically discloses a preparation device for battery electrode sheets and a preparation method for battery electrode sheets, including a protective table. An inlet is provided inside the protective table. A flow control knob is provided on one side of the connecting and regulating pipeline. One end of the second connecting protective ring is provided with a pre-stirring cylinder. A stirring rotating column is provided inside the pre-stirring cylinder. First stirring blades are provided on the outer wall of the stirring rotating column. One end of the stirring rotating column is provided with a rotating protection. One end of the pre-stirring cylinder is provided with a fourth connecting protective ring. Second stirring blades are provided on the outer wall of the box body stirring column. A main material pipe is provided in the middle of the bottom end of the storage and mixing box. The effect of mixing raw materials is more excellent, the mixing degree of raw materials is higher. At the same time, after the mixing is used up, it can be effectively stored, and the mixing effect during use can still reach the specified effect.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and more particularly to a preparation device for battery electrodes and a preparation method for battery electrodes. Background Art

[0002] A lithium-ion battery is a secondary battery (rechargeable battery), which mainly works by the movement of lithium ions between the positive electrode and the negative electrode. Lithium-ion batteries can be divided into laminated type, button type, and cylindrical type according to their shapes. Lithium-ion batteries have the advantages of large energy, small self-discharge, high power, good cycle characteristics, fast charging, wide operating temperature range, high efficiency, and no environmental pollution. In recent years, they have been widely used in the fields of portable electronic devices, large-scale energy storage devices, and electric vehicles.

[0003] At present, the improvement of the rate performance of high-power batteries mainly starts from two aspects: the battery structure and the electrochemical system. From the aspect of the battery structure, the rate performance of the battery is mainly improved from aspects such as the coating method of the electrode, the compaction density, and the winding method of the battery core; in terms of the electrochemical system, the rate performance of the battery is mainly improved by doping highly conductive active materials such as graphene and capacitive carbon, and changing the slurry ratio of the positive and negative electrodes to prepare lithium-ion capacitors.

[0004] In order to increase the power performance of lithium batteries, at present, the improvement of battery performance mainly starts from two aspects: the battery structure and the electrochemical system. From the battery structure, the performance of the battery is mainly improved through the coating method of the electrode, the compaction density, and the winding method of the battery core. In terms of the electrochemical system, the rate performance of the battery is mainly improved by incorporating highly conductive active materials such as graphene and capacitive carbon, and changing the slurry ratio of the positive and negative electrodes. At the same time, the cost generated during the preparation of lithium batteries is divided into two parts, with the structure accounting for half and the chemical system accounting for half. Among them, the battery electrode accounts for half of half of the structure. Therefore, the battery electrode plays an extremely important role in lithium batteries.

[0005] At present, when mixing and coating the positive and negative electrodes of battery electrodes, most use the manual grinding method and the mechanical slurry mixing method. However, most of the existing industrial slurry mixing equipment feeds materials at one feeding port for slurry mixing, with inaccurate proportioning and poor slurry mixing uniformity. When performing mixing and coating, due to the hydrophobicity of the conductive agent and its stronger binding ability with the binder than the main materials of the positive and negative electrodes, the conductive agent is extremely likely to aggregate on the battery electrode during mixing, coating, and drying. The uneven distribution of the conductive agent will seriously affect the performance of the battery electrode. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a preparation device for battery electrodes and a preparation method for battery electrodes to solve the problems existing in the above-mentioned background art.

[0007] The present invention provides the following technical solution: a preparation device for battery electrode sheets, including a protection table. Inside the protection table, there is a feeding port which penetrates through the protection table and forms a hole. The feeding port is divided into three parts and distributed on the protection table. At the bottom end of each feeding port, there is a first connection protection ring. At the bottom end of each first connection protection ring, there is a connection control pipe. The feeding port is fixedly connected to the connection control pipe through the first connection protection ring. On one side of the connection control pipe, there is a flow control knob which is movably connected to the connection control pipe. At the bottom end of the connection control pipe, there is a third connection protection ring. At the bottom end of the third connection protection ring, there is a main material pipe. The connection control pipe is fixedly connected to the main material pipe through the third connection protection ring. At one end of the main material pipe, there is a second connection protection ring. At one end of the second connection protection ring, there is a pre-stirring cylinder. The main material pipe is fixedly connected to the pre-stirring cylinder through the second connection protection ring. Inside the pre-stirring cylinder, there is a stirring rotating column. On the outer wall of the stirring rotating column, there are first stirring blades. At one end of the stirring rotating column, there is a rotating protection. At one end of the pre-stirring cylinder, there is a fourth connection protection ring. The rotating protection is fixedly connected to the pre-stirring cylinder through the fourth connection protection ring. Inside the rotating protection, there is a working motor which is drivingly connected to the stirring rotating column through the rotating protection. On one side of the top end of the pre-stirring cylinder, there is a pre-stirring transport pipe which penetrates through the pre-stirring cylinder and is fixedly connected. The other end of the pre-stirring transport pipe is still provided with a pre-stirring cylinder. At the top end of the pre-stirring cylinder, there is a mixing transport pipe. The other end of the mixing transport pipe is provided with a storage and mixing box. The mixing transport pipe penetrates through the storage and mixing box and is fixedly connected. At the top end of the storage and mixing box, there is a rotating connection mechanism which penetrates through the storage and mixing box and is fixedly connected. At the bottom end of the rotating connection mechanism, there is a box body stirring column which is fixedly connected to the rotating connection mechanism. On the outer wall of the box body stirring column, there are second stirring blades which are fixedly connected to the box body stirring column. In the middle of the bottom end of the storage and mixing box, there is a main material pipe which penetrates through the storage and mixing box and is fixedly connected;

[0008] Further, at the bottom end of the storage and mixing box, there are second support columns which are divided into four parts and distributed around the bottom end of the storage and mixing box and are fixedly connected. On the outer wall of the box body stirring column, there are second stirring blades which are distributed around the box body stirring column and are evenly divided into five layers from the bottom end to the middle.

[0009] Further, at the four corners of the bottom end of the protection table, there are first support columns which are fixedly connected to the protection table. On the side of the protection table close to one of the first support columns, there is an electric control box which is fixedly connected to the first support column and the protection table.

[0010] Further, the working motor is divided into two parts which are distributed at the bottom of the protective platform and parallel to each other. The top of the pre-stirring cylinder is provided with a pre-stirring and transporting pipe, and the pre-stirring cylinder is fixedly connected to the pre-stirring and transporting pipe. The other end of the pre-stirring and transporting pipe is provided with a pre-stirring cylinder. The pre-stirring and transporting pipe is located in the middle of one end of the other pre-stirring cylinder. One side of the top of the pre-stirring cylinder is provided with a mixing and transporting pipe, and the other end of the mixing and transporting pipe is provided with and fixedly connected to a storage and mixing tank.

[0011] Further, a discharge pipe is provided in the middle of the mixing and transporting pipe. The discharge pipe penetrates through the mixing and transporting pipe and is fixedly connected. The other end of the discharge pipe is provided with a discharge port, and the discharge pipe is fixedly connected to the discharge port. A discharge control knob is provided at the top of the discharge pipe, and the discharge pipe is movably connected to the discharge control knob.

[0012] Further, the feeding port is divided into three parts and distributed and fixedly connected at the top of the protective platform. A first connecting protective ring is provided at the bottom of the feeding port. A flow rate regulating knob is provided at the bottom of the first connecting protective ring. The flow rate regulating knob is movably connected to the connecting regulating pipe and controls the flow rate.

[0013] Further, both ends of the main material pipe are respectively connected to and fixedly connected to the pre-stirring cylinder and the storage and mixing tank. A third connecting protective ring is provided in the middle of the top of the main material pipe and is fixedly connected to the connecting regulating pipe.

[0014] Further, pre-stirring cylinders are provided at both ends of the pre-stirring and transporting pipe to transfer pre-mixed slurry. One side of the top of the pre-stirring cylinder is provided with a mixing and transporting pipe. The other end of the mixing and transporting pipe is provided with a storage and mixing tank. The stirring column and the second stirring blades inside the storage and mixing tank stir and mix the slurry inside it in the lower, middle, and upper layers respectively. A main material pipe is provided in the middle of the bottom of the storage and mixing tank. A discharging rotary handle is provided on the side of the main material pipe close to the storage and mixing tank end. The main material pipe is movably connected to the discharging rotary handle.

[0015] Further, it includes the following steps:

[0016] S1. Put the ratio of active material: conductive agent: binder = 8:1:1 (or 8:1.5:0.5, which can be adjusted appropriately according to the materials, the positive electrode material is not less than 75, and the conductive agent and the binder are not less than 5) into the feeding port. Adjust the materials in the feeding port to flow into the main material pipe through the flow rate regulating knob, reach the pre-stirring cylinder through the main material pipe, and perform pre-mixing through the stirring rotating column and the first stirring blades inside it. Then, transfer it into the second pre-stirring cylinder through the pre-stirring and transporting pipe and perform slurry mixing again through the stirring rotating column inside it. Then, flow into the storage and mixing tank through the mixing and transporting pipe, and perform slurry adjustment through the stirring column and the second stirring blades inside the storage and mixing tank;

[0017] S2. When coating is required after mixing is completed, close the pipeline connected to the regulation pipeline through the flow regulation knob, and then open the switch of the main material pipe through the discharging rotary handle, so that the mixed slurry in the storage and mixing tank flows into the pre-stirring cylinder again through the main material pipe, is stirred again by the stirring rotating column and the first stirring blade inside it, and then flows into the second pre-stirring cylinder through the pre-stirring and transportation pipe. After secondary stirring by the stirring rotating column and the first stirring blade inside it, open the discharging pipe through the discharging control handle on the mixing and transportation pipe, and flow out through the discharging port for coating.

[0018] Technical effects and advantages of the present invention:

[0019] By providing a feeding port, the present invention is beneficial to more accurate proportion during feeding and stirring of different materials, and at the same time, the mixing effect is more remarkable during mixing.

[0020] By providing a stirring rotating column, a first stirring blade, a box body stirring column, and a second stirring blade, the present invention is beneficial to more remarkable mixing effect of raw materials, higher mixing degree of raw materials, and effective storage after mixing. At the same time, the mixing effect can still reach the specified effect when used again. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the feeding port structure of the present invention.

[0023] Figure 3 It is a schematic diagram of the stirring working structure of the present invention.

[0024] Figure 4 It is a schematic diagram of the stirring blade structure of the present invention.

[0025] Figure 5 It is a schematic diagram of the storage cross-section structure of the present invention.

[0026] Figure 6 It is a schematic diagram of the discharging port structure of the present invention.

[0027] Figure 7 It is a schematic diagram of the storage tank structure of the present invention.

[0028] The reference numerals are: 1, protective platform; 101, first support column; 2, electric control box; 3, feed inlet; 301, first connecting protective ring; 4, working motor; 5, main material pipe; 501, second connecting protective ring; 6, storage and mixing tank; 601, second support column; 7, rotary connection mechanism; 8, mixing and transportation pipe; 9, flow regulation knob; 10, connecting regulation pipeline; 1001, third connecting protective ring; 11, rotating protection; 1101, fourth connecting protective ring; 12, pre-stirring cylinder; 13, pre-stirring transportation pipe; 14, stirring rotating column; 1401, first stirring blade; 15, box body stirring column; 1501, second stirring blade; 16, discharge pipe; 1601, discharge port; 17, discharge control turning handle; 18, discharging rotary handle. Detailed implementation manners

[0029] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. In addition, the forms of each structure described in the following embodiments are merely examples. The battery electrode sheet preparation device and the battery electrode sheet preparation method involved in the present invention are not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0030] Refer to Figures 1-7, the present invention provides a preparation device for battery electrode sheets, including a protective table 1. Inside the protective table 1, there is a feeding port 3. The feeding port 3 penetrates through the protective table 1 and forms a hole. The feeding port 3 is divided into three parts and distributed on the protective table 1. At the bottom end of each feeding port 3, there is a first connection protective ring 301. At the bottom end of each first connection protective ring 301, there is a connection regulation pipeline 10. The feeding port 3 is fixedly connected to the connection regulation pipeline 10 through the first connection protective ring 301. On one side of the connection regulation pipeline 10, there is a flow regulation knob 9. The flow regulation knob 9 is movably connected to the connection regulation pipeline 10. At the bottom end of the connection regulation pipeline 10, there is a third connection protective ring 1001. At the bottom end of the third connection protective ring 1001, there is a main material pipe 5. The connection regulation pipeline 10 is fixedly connected to the main material pipe 5 through the third connection protective ring 1001. At one end of the main material pipe 5, there is a second connection protective ring 501. At one end of the second connection protective ring 501, there is a pre-stirring cylinder 12. The main material pipe 5 is fixedly connected to the pre-stirring cylinder 12 through the second connection protective ring 501. Inside the pre-stirring cylinder 12, there is a stirring rotating column 14. On the outer wall of the stirring rotating column 14, there are first stirring blades 1401. At one end of the stirring rotating column 14, there is a rotating protection 11. At one end of the pre-stirring cylinder 12, there is a fourth connection protective ring 1101. The rotating protection 11 is fixedly connected to the pre-stirring cylinder 12 through the fourth connection protective ring 1101. Inside the rotating protection 11, there is a working motor 4. The working motor 4 is drivingly connected to the stirring rotating column 14 through the rotating protection 11. On one side of the top end of the pre-stirring cylinder 12, there is a pre-stirring transportation pipe 13. The pre-stirring transportation pipe 13 penetrates through the pre-stirring cylinder 12 and is fixedly connected. The other end of the pre-stirring transportation pipe 13 is still provided with a pre-stirring cylinder 12. At the top end of the pre-stirring cylinder 12, there is a mixing transportation pipe 8. The other end of the mixing transportation pipe 8 is provided with a storage and mixing tank 6. The mixing transportation pipe 8 penetrates through the storage and mixing tank 6 and is fixedly connected. At the top end of the storage and mixing tank 6, there is a transfer connection mechanism 7. The transfer connection mechanism 7 penetrates through the storage and mixing tank 6 and is fixedly connected. At the bottom end of the transfer connection mechanism 7, there is a box body stirring column 15. The transfer connection mechanism 7 is fixedly connected to the box body stirring column 15. On the outer wall of the box body stirring column 15, there are second stirring blades 1501. The box body stirring column 15 is fixedly connected to the second stirring blades 1501. In the middle of the bottom end of the storage and mixing tank 6, there is a main material pipe 5. The main material pipe 5 penetrates through the storage and mixing tank 6 and is fixedly connected;

[0031] Refer to Figures 1-5 , at the bottom end of the storage and mixing tank 6, there are second support columns 601. The second support columns 601 are divided into four parts and distributed around the bottom end of the storage and mixing tank 6 and are fixedly connected. On the outer wall of the box body stirring column 15, there are second stirring blades 1501. The second stirring blades 1501 are distributed around the box body stirring column 15 and are evenly divided into five layers from the bottom end to the middle, making the mixed materials more uniform and having a better use effect.

[0032] Refer to Figure 1, at the four corners of the bottom end of the protective platform 1, first support columns 101 are provided. The protective platform 1 is fixedly connected to the first support columns 101. On the side of the protective platform 1 close to the first support columns 101, an electric control box 2 is provided. The electric control box 2 is fixedly connected to the first support columns 101 and the protective platform 1, making the integrity of the equipment more excellent. At the same time, the electric control box 2 controls the mixing time and rotation speed of the mixed materials.

[0033] Refer to Figure 3 , the working motor 4 is divided into two and distributed at the bottom end of the protective platform 1 and parallel to each other. The top end of the pre-stirring cylinder 12 is provided with a pre-stirring and transporting pipe 13. The pre-stirring cylinder 12 is fixedly connected to the pre-stirring and transporting pipe 13. The other end of the pre-stirring and transporting pipe 13 is provided with a pre-stirring cylinder 12. The pre-stirring and transporting pipe 13 is located in the middle of one end of the pre-stirring cylinder 12 at the other end. On one side of the top end of the pre-stirring cylinder 12, a mixing and transporting pipe 8 is provided. The other end of the mixing and transporting pipe 8 is provided with and fixedly connected to a storage and mixing tank 6. After two times of mixing, it reaches the storage and mixing tank 6 for a smoother and more stable state.

[0034] Refer to Figure 6 , in the middle of the mixing and transporting pipe 8, a discharge pipe 16 is provided. The discharge pipe 16 penetrates through the mixing and transporting pipe 8 and is fixedly connected. The other end of the discharge pipe 16 is provided with a discharge port 1601. The discharge pipe 16 is fixedly connected to the discharge port 1601. At the top end of the discharge pipe 16, a discharge control knob 17 is provided. The discharge pipe 16 is movably connected to the discharge control knob 17, making the coating more uniform and the effect better when the mixing is completed.

[0035] Refer to Figures 1-2 , the feeding ports 3 are divided into three parts and distributed and fixedly connected at the top end of the protective platform 1. At the bottom end of the feeding ports 3, a first connecting protective ring 301 is provided. At the bottom end of the first connecting protective ring 301, a flow regulation knob 9 is provided. The flow regulation knob 9 is movably connected to the connecting regulation pipe 10 and controls the flow rate, making the ratio more uniform during mixing and the mixing effect better.

[0036] Refer to Figures 1-2 , both ends of the main material pipe 5 are respectively connected to and fixedly connected to the pre-stirring cylinder 12 and the storage and mixing tank 6. In the middle of the top end of the main material pipe 5, a third connecting protective ring 1001 is provided and fixedly connected to the connecting regulation pipe 10, making the mixing effect more excellent.

[0037] Refer to Figures 5-7, both ends of the pre-stirring transport pipe 13 are provided with pre-stirring cylinders 12 for transporting pre-mixed slurries. On one side of the top end of the pre-stirring cylinder 12, there is a mixing transport pipe 8. The other end of the mixing transport pipe 8 is provided with a storage and mixing tank 6. The tank stirring column 15 and the second stirring blade 1501 inside the storage and mixing tank 6 stir and mix the slurries therein in the lower, middle, and upper layers respectively. In the middle of the bottom end of the storage and mixing tank 6, there is a main material pipe 5. On the side of the main material pipe 5 close to the storage and mixing tank 6, there is a discharging rotary handle 18. The main material pipe 5 is movably connected to the discharging rotary handle 18. When the mixed material is placed into the storage and mixing tank 6, mixing is carried out, making the mixed material more uniform and achieving a more excellent effect during coating.

[0038] Refer to Figures 1-7 , the preparation method of the battery electrode sheet includes the following steps:

[0039] S1. Put the active material: conductive agent: binder = 8:1:1 (or 8:1.5:0.5, which can be appropriately adjusted according to the materials, the positive electrode material is not less than 75, and the conductive agent and binder are not less than 5) into the feeding port 3. Through the flow rate control knob 9, the materials in the feeding port 3 flow into the main material pipe 5, reach the pre-stirring cylinder 12 through the main material pipe 5, and are pre-mixed by the stirring rotating column 14 and the first stirring blade 1401 inside it. Then, it is transferred into the second pre-stirring cylinder 12 through the pre-stirring transport pipe 13 and is mixed again by the stirring rotating column 14 and the first stirring blade 1401 inside it. Then, it flows into the storage and mixing tank 6 through the mixing transport pipe 8 and is adjusted by the tank stirring column 15 and the second stirring blade 1501 inside the storage and mixing tank 6.

[0040] S2. When coating is required after the mixing is completed, close the pipeline connecting the regulating pipeline 10 through the flow rate control knob 9. Then, open the switch of the main material pipe 5 through the discharging rotary handle 18, so that the mixed slurry in the storage and mixing tank 6 flows into the pre-stirring cylinder 12 again through the main material pipe 5, and is stirred again by the stirring rotating column 14 and the first stirring blade 1401 inside it. Then, it flows into the second pre-stirring cylinder 12 through the pre-stirring transport pipe 13. After being stirred twice by the stirring rotating column 14 and the first stirring blade 1401 inside it, open the discharging pipe 16 through the discharging control rotary handle 17 on the mixing transport pipe 8, and flow out through the discharging port 1601 for coating.

Claims

1. Preparation device for battery electrode plate, including a protective platform (1), characterized in that, an inlet (3) is arranged inside the protective platform (1), the inlet (3) penetrates through the protective platform (1) and forms a hole, the inlet (3) is divided into three parts and distributed on the protective platform (1), a first connection protective ring (301) is arranged at the bottom end of each inlet (3), a connection control pipe (10) is arranged at the bottom end of each first connection protective ring (301), the inlet (3) is fixedly connected to the connection control pipe (10) through the first connection protective ring (301), a flow control knob (9) is arranged on one side of the connection control pipe (10), the flow control knob (9) is movably connected to the connection control pipe (10), a third connection protective ring (1001) is arranged at the bottom end of the connection control pipe (10), a main material pipe (5) is arranged at the bottom end of the third connection protective ring (1001), the connection control pipe (10) is fixedly connected to the main material pipe (5) through the third connection protective ring (1001), a second connection protective ring (501) is arranged at one end of the main material pipe (5), a pre-stirring cylinder (12) is arranged at one end of the second connection protective ring (501), the main material pipe (5) is fixedly connected to the pre-stirring cylinder (12) through the second connection protective ring (501), a stirring rotating column (14) is arranged inside the pre-stirring cylinder (12), a first stirring blade (1401) is arranged on the outer wall of the stirring rotating column (14), a rotating protection (11) is arranged at one end of the stirring rotating column (14), a fourth connection protective ring (1101) is arranged at one end of the pre-stirring cylinder (12), the rotating protection (11) is fixedly connected to the pre-stirring cylinder (12) through the fourth connection protective ring (1101), a working motor (4) is arranged inside the rotating protection (11), the working motor (4) is in transmission connection with the stirring rotating column (14) through the rotating protection (11), a pre-stirring transportation pipe (13) is arranged on one side of the top end of the pre-stirring cylinder (12), the pre-stirring transportation pipe (13) penetrates through the pre-stirring cylinder (12) and is fixedly connected, the other end of the pre-stirring transportation pipe (13) is still provided with a pre-stirring cylinder (12), a mixing transportation pipe (8) is arranged at the top end of the pre-stirring cylinder (12), the other end of the mixing transportation pipe (8) is provided with a storage and mixing box (6), the mixing transportation pipe (8) penetrates through the storage and mixing box (6) and is fixedly connected, a rotating connection mechanism (7) is arranged at the top end of the storage and mixing box (6), the rotating connection mechanism (7) penetrates through the storage and mixing box (6) and is fixedly connected, a box body stirring column (15) is arranged at the bottom end of the rotating connection mechanism (7), the rotating connection mechanism (7) is fixedly connected to the box body stirring column (15), a second stirring blade (1501) is arranged on the outer wall of the box body stirring column (15), the box body stirring column (15) is fixedly connected to the second stirring blade (1501), a main material pipe (5) is arranged in the middle of the bottom end of the storage and mixing box (6), the main material pipe (5) penetrates through the storage and mixing box (6) and is fixedly connected.

2. The preparation device for battery electrode sheets according to claim 1, characterized in that: a second support column (601) is provided at the bottom end of the storage and mixing box (6), the second support column (601) is divided into four parts and distributed around the bottom end of the storage and mixing box (6) and fixedly connected, a second stirring blade (1501) is provided on the outer wall of the box body stirring column (15), and the second stirring blade (1501) is distributed around the box body stirring column (15) and is evenly divided into five layers from the bottom end to the middle.

3. The preparation device for battery electrode sheets according to claim 1, characterized in that: first support columns (101) are provided at the four corners of the bottom end of the protective platform (1), the protective platform (1) is fixedly connected to the first support columns (101), an electric control box (2) is provided on the side of the protective platform (1) close to the first support columns (101), and the electric control box (2) is fixedly connected to the first support columns (101) and the protective platform (1).

4. The preparation device for battery electrode sheets according to claim 1, characterized in that: the working motors (4) are divided into two and distributed at the bottom end of the protective platform (1) and are parallel to each other, a pre-stirring and transporting pipe (13) is provided through the top end of the pre-stirring cylinder (12), the pre-stirring cylinder (12) is fixedly connected to the pre-stirring and transporting pipe (13), the other end of the pre-stirring and transporting pipe (13) is provided with a pre-stirring cylinder (12), the pre-stirring and transporting pipe (13) is located in the middle of one end of the pre-stirring cylinder (12) at the other end, a mixing and transporting pipe (8) is provided on one side of the top end of the pre-stirring cylinder (12), and the other end of the mixing and transporting pipe (8) is provided with and fixedly connected to a storage and mixing box (6).

5. The preparation device for battery electrode sheets according to claim 1, characterized in that: a discharge pipe (16) is provided in the middle of the mixing and transporting pipe (8), the discharge pipe (16) penetrates through the mixing and transporting pipe (8) and is fixedly connected, the other end of the discharge pipe (16) is provided with a discharge port (1601), the discharge pipe (16) is fixedly connected to the discharge port (1601), a discharge control knob (17) is provided at the top end of the discharge pipe (16), and the discharge pipe (16) is movably connected to the discharge control knob (17).

6. The preparation device for battery electrode sheets according to claim 1, characterized in that: the feeding ports (3) are divided into three parts and distributed at the top end of the protective platform (1) and are fixedly connected, a first connection protection ring (301) is provided at the bottom end of the feeding ports (3), a flow rate regulation knob (9) is provided at the bottom end of the first connection protection ring (301), and the flow rate regulation knob (9) is movably connected to a connection regulation pipeline (10) and controls the flow rate.

7. The preparation device for battery electrode sheets according to claim 1, characterized in that: both ends of the main material pipe (5) are respectively connected to and fixedly connected to the pre-stirring cylinder (12) and the storage and mixing box (6), and a third connection protection ring (1001) is provided in the middle of the top end of the main material pipe (5) and is fixedly connected to the connection regulation pipeline (10).

8. The preparation device for battery electrode sheets according to claim 1, characterized in that: Both ends of the pre-stirring and transporting pipe (13) are provided with pre-stirring drums (12) for transporting pre-mixed slurries. One side of the top of the pre-stirring drum (12) is provided with a mixing and transporting pipe (8). The other end of the mixing and transporting pipe (8) is provided with a storage and mixing tank (6). The tank stirring column (15) and the second stirring blade (1501) inside the storage and mixing tank (6) stir and mix the slurries therein in the lower, middle, and upper layers respectively. In the middle of the bottom end of the storage and mixing tank (6), there is a main material pipe (5). On the side of the main material pipe (5) near the storage and mixing tank (6), there is a discharging rotary handle (18). The main material pipe (5) is movably connected to the discharging rotary handle (18).

9. A method for preparing a battery electrode sheet using the battery electrode sheet preparation device according to any one of claims 1-8, characterized in that: it includes the following steps: S1. Put the mixture of active material: conductive agent: binder = 8:1:1 into the feeding port (3). Through the flow rate control knob (9), the materials in the feeding port (3) are flowed into the main material pipe (5), and reach the pre-stirring drum (12) through the main material pipe (5). The stirring rotating column (14) and the first stirring blade (1401) inside it are used for pre-mixing. Then, it is transferred into the second pre-stirring drum (12) through the pre-stirring and transporting pipe (13), and the stirring rotating column (14) and the first stirring blade (1401) inside it are used for re-mixing the slurry. Then, it flows into the storage and mixing tank (6) through the mixing and transporting pipe (8), and the tank stirring column (15) and the second stirring blade (1501) inside the storage and mixing tank (6) are used for adjusting the slurry; S2. When coating is required after mixing is completed, close the pipeline connecting the regulating pipeline (10) through the flow rate control knob (9). Then, open the switch of the main material pipe (5) through the discharging rotary handle (18), so that the mixed slurry in the storage and mixing tank (6) flows into the pre-stirring drum (12) again through the main material pipe (5), and is stirred again by the stirring rotating column (14) and the first stirring blade (1401) inside it. Then, it flows into the second pre-stirring drum (12) through the pre-stirring and transporting pipe (13). After being stirred twice by the stirring rotating column (14) and the first stirring blade (1401) inside it, open the discharging pipe (16) through the discharging control rotary handle (17) on the mixing and transporting pipe (8), and it flows out through the discharging port (1601) for coating.

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