Method and device for preparing negative electrode slurry of lead-carbon battery through ultrasonic and high-speed shearing composite dispersion

Abstract

The invention discloses a method and device for preparing lead-carbon battery negative electrode slurry through ultrasonic and high-speed shearing composite disperse.The device comprises a supporting frame, an ultrasonic disperser is fixedly installed at the top of the supporting frame, a mixing barrel is arranged above the ultrasonic disperser, the bottom of the mixing barrel is communicated with a feeding port in the top of the ultrasonic disperser, and a stirring assembly is arranged in the mixing barrel; through the synergistic effect of the ultrasonic disperser and the shearing, grinding and emulsifying composite dispersion system, multi-stage fine dispersion of the lead-carbon battery negative electrode slurry is realized, the ultrasonic disperser preliminarily crushes material aggregates by utilizing a cavitation effect, and the shearing module generates strong shearing force through a rotating shaft which rotates reversely at a high rotating speed to further refine particles; and the grinding instrument realizes micron-sized particle dispersion through accurately controlled grinding gaps, so that the dispersion uniformity of active substances, conductive agents and additives in the slurry is remarkably improved, and the problem of non-uniform particle distribution in a traditional preparation method is effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of lead-carbon batteries, and particularly relates to a method and a device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion. Background Art

[0002] As a high-performance energy storage device, lead-carbon battery has shown extremely broad application prospects in many fields such as electric vehicles, energy storage systems, and backup power supplies due to its advantages such as high power density, long cycle life, low cost and good safety performance. In the composition of lead-carbon batteries, the negative electrode slurry is a key component, and its performance plays a decisive role in the overall performance of the battery. The dispersion uniformity, particle size and distribution state of components such as active materials, conductive agents and binders in the negative electrode slurry will directly affect the electrochemical performance of the battery, such as charge and discharge efficiency, capacity retention rate, etc., and are also related to the cycle stability of the battery and determine the service life of the battery.

[0003] The existing negative electrode slurry preparation methods often have low dispersion efficiency and require a long time to achieve a certain dispersion effect, which not only prolongs the production cycle and reduces production efficiency, but also increases the energy consumption cost in the production process. To this end, we propose a method and device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion to solve the problems existing in the existing technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and apparatus for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion. By combining ultrasonic dispersion and high-speed shear grinding emulsification composite dispersion technology, efficient and uniform dispersion of lead-carbon battery negative electrode slurry is achieved, and the dispersion efficiency and uniformity are improved to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The method for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion comprises the following steps:

[0007] Step 1: Add lead powder, carbon black, conductive agent and binder into the mixing drum through the feed pipe according to the formula ratio, then start the first drive motor to drive the stirring rod and stirring paddle to rotate and preliminarily stir and mix the materials in the mixing drum. The stirring speed is 100-300 rpm and the stirring time is 5-10 minutes to ensure that the materials are preliminarily dispersed and evenly dispersed, thereby forming a negative electrode material mixture;

[0008] Step 2: Start the second drive motor to drive the screw to rotate, so that the movable plate moves up and down along the screw, and drives the annular scraper to slide up and down along the inner wall of the mixing barrel through the connecting rod to remove the negative electrode material mixture attached to the barrel wall and discharge it;

[0009] Step 3: The negative electrode material mixture then enters an ultrasonic disperser with a power of 200-500W and a frequency of 20-40kHz. The material in the mixing drum is ultrasonically dispersed for 15-30 minutes to break up material agglomerates using the ultrasonic cavitation effect.

[0010] Step 4: After ultrasonic dispersion is completed, the negative electrode material mixture enters the housing of the composite dispersion system through the feed pipe, and then the third drive motor is started, which drives the two sets of rotating shafts and the cutter to rotate in opposite directions through the gear transmission group to shear the material. The shearing speed is 3000-8000 rpm and the shearing time is 10-20 minutes;

[0011] Step 5: The sheared negative electrode material mixture enters the grinder through the guide hopper for grinding and emulsification treatment. The grinding gap of the grinder is 5-20 μm, the grinding pressure is 0.5-2 MPa, and the grinding time is 20-40 minutes to further refine the material particles and evenly disperse them;

[0012] Step 6: The negative electrode slurry after grinding and emulsification is discharged and collected through the discharge pipe. The solid content, viscosity, particle size distribution and other indicators of the slurry are tested and adjusted to meet the production requirements of lead-carbon batteries.

[0013] The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion comprises:

[0014] A support frame, on the top of which an ultrasonic disperser is fixedly installed, a mixing cylinder is provided above the ultrasonic disperser, and the bottom of the mixing cylinder is connected to the feed port at the top of the ultrasonic disperser;

[0015] The stirring assembly is arranged inside the mixing barrel. The mixing barrel is provided with an annular scraper, and the outer wall of the annular scraper is in contact with the inner wall of the mixing barrel.

[0016] A power assembly is provided at the top of the mixing barrel. The movable end of the power assembly is connected to the annular scraper, and the annular scraper can be moved up and down to reduce the material residue inside the mixing barrel.

[0017] The shearing, grinding, emulsifying and composite dispersing system has a feed pipe fixedly connected to the top of the feed pipe, and the top end of the feed pipe is connected to the discharge port of the ultrasonic disperser;

[0018] The control system is electrically connected to the ultrasonic disperser, the stirring component, the power component and the shearing, grinding and emulsifying composite dispersion system.

[0019] Preferably, the stirring assembly includes a stirring rod, the top end of which is rotatably mounted on the inner top of the mixing barrel, the top end of the stirring rod passes through the mixing barrel and is connected to a first drive motor, and several groups of stirring paddles are fixedly connected to the outer wall of the stirring rod.

[0020] Preferably, the first drive motor is fixedly mounted on the top of the mixing barrel, and one end of the output shaft of the first drive motor is fixedly connected to the top end of the stirring rod.

[0021] Preferably, the power assembly includes a support frame, which is fixedly connected to the mixing barrel, and a screw rod is rotatably installed on the support frame. The top end of the screw rod passes through the support frame and is connected to a second drive motor. A movable connecting frame is provided on the outer wall of the screw rod, and the bottom end of the movable connecting frame is connected to the annular scraper.

[0022] Preferably, the movable connecting frame includes a movable plate, which is threadedly connected to the outer wall of the screw rod, and the bottom of the movable plate is fixedly connected to two sets of connecting rods, the bottom ends of the connecting rods pass through the mixing barrel and are fixedly connected to the top of the annular scraper.

[0023] Preferably, a guide sleeve is fixedly embedded on the top of the mixing barrel, and the connecting rod is slidably inserted into the interior of the guide sleeve.

[0024] Preferably, the composite dispersion system includes a box body, which is fixedly connected to the bottom end of the feed pipe, a guide hopper is fixedly installed inside the box body, a shearing module is provided above the guide hopper, and a grinder is fixedly connected to the bottom of the guide hopper.

[0025] Preferably, the shearing module includes two groups of rotating shafts, the two ends of which are rotatably mounted on the inner walls on both sides of the box body, one end of each group of rotating shafts passes through the box body and is connected to a gear transmission group, one group of rotating shafts serves as a driving shaft and passes through the box body and is connected to a third drive motor, and cutters are fixedly connected to the outer walls of each group of rotating shafts.

[0026] Preferably, it further comprises a discharge pipe, which is fixedly connected to the grinder, and a feed pipe is fixedly connected to the outer wall of the mixing cylinder.

[0027] Technical effects and advantages of the present invention: The method and device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion proposed in the present invention have the following advantages over the prior art:

[0028] 1. The present invention achieves multi-stage fine dispersion of lead-carbon battery negative electrode slurry through the synergistic effect of an ultrasonic disperser and a shearing, grinding and emulsification composite dispersion system. The ultrasonic disperser uses the cavitation effect to initially break up material agglomerates. The shear module generates a strong shear force through the high-speed counter-rotating shaft to further refine the particles. The grinder achieves micron-level particle dispersion through a precisely controlled grinding gap, significantly improving the dispersion uniformity of active substances, conductive agents and additives in the slurry, and effectively solving the problem of uneven particle distribution in traditional preparation methods.

[0029] 2. The present invention drives the annular scraper to slide up and down along the inner wall of the mixing barrel through the power component, effectively removing the material attached to the barrel wall, reducing material residue and improving the utilization rate of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure inside the mixing barrel of the present invention;

[0032] Figure 3 It is a schematic structural diagram of the interior of the box of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the annular scraper and power assembly of the present invention.

[0034] In the figure: 1. Support frame; 2. Ultrasonic disperser; 3. Mixing barrel; 4. Stirring assembly; 401. Stirring rod; 402. First drive motor; 403. Stirring paddle; 5. Power assembly; 501. Support frame; 502. Screw; 503. Second drive motor; 504. Movable connecting frame; 5041. Movable plate; 5042. Connecting rod; 6. Composite dispersion system; 601. Box; 602. Guide hopper; 603. Shearing module; 6031. Rotating shaft; 6032. Gear transmission group; 6033. Third drive motor; 6034. Cutter; 604. Grinder; 7. Feed pipe; 8. Control system; 9. Annular scraper; 10. Guide sleeve; 11. Discharge pipe; 12. Feed pipe. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] The present invention provides Figure 1-4 The method for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion shown includes the following steps:

[0037] Step 1: Lead powder, carbon black, conductive agent, and binder are added to the interior of the mixing drum 3 through the feed pipe 12 according to the formula ratio. Then, the first drive motor 402 is started to drive the stirring rod 401 and the stirring paddle 403 to rotate to preliminarily stir and mix the materials in the mixing drum 3. The stirring speed is 100-300 rpm and the stirring time is 5-10 minutes to ensure that the materials are preliminarily dispersed and evenly dispersed, thereby forming a negative electrode material mixture.

[0038] Step 2: Start the second drive motor 503 to rotate the screw 502, causing the movable plate 5041 to move up and down along the screw 502. The connecting rod 5042 drives the annular scraper 9 to slide up and down along the inner wall of the mixing barrel 3 to remove the negative electrode material mixture adhering to the barrel wall and discharge it;

[0039] Step 3: The negative electrode material mixture then enters the ultrasonic disperser 2, with the power set to 200-500W and the frequency set to 20-40kHz, to perform ultrasonic dispersion treatment on the material in the mixing drum 3 for 15-30 minutes, using the ultrasonic cavitation effect to break up the material agglomerates;

[0040] Step 4: After ultrasonic dispersion is completed, the negative electrode material mixture enters the housing 601 of the composite dispersion system 6 through the feed pipe 7. Then, the third drive motor 6033 is started, which drives the two sets of rotating shafts 6031 and the cutter 6034 to rotate in opposite directions through the gear transmission group 6032 to shear the material. The shearing speed is 3000-8000 rpm and the shearing time is 10-20 minutes.

[0041] Step 5: The sheared negative electrode material mixture enters the grinder 604 through the guide hopper 602 for grinding and emulsification. The grinding gap of the grinder 604 is 5-20 μm, the grinding pressure is 0.5-2 MPa, and the grinding time is 20-40 minutes, so that the material particles are further refined and evenly dispersed.

[0042] Step 6: The negative electrode slurry after grinding and emulsification is discharged and collected through the discharge pipe 11. The solid content, viscosity, particle size distribution and other indicators of the slurry are tested and adjusted to meet the production requirements of lead-carbon batteries.

[0043] The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion mainly consists of a support frame 1, an ultrasonic disperser 2, a mixing drum 3, a stirring assembly 4, a power assembly 5, a shearing, grinding, emulsification composite dispersion system 6, and a control system 8. The support frame 1 plays a role of stable support to ensure the stability of the entire device. The ultrasonic disperser 2 is fixedly installed on the top of the support frame 1, and the mixing drum 3 is arranged above the ultrasonic disperser 2. The bottom of the mixing drum 3 is connected to the top feed port of the ultrasonic disperser 2, and the material can smoothly enter the ultrasonic disperser 2 from the mixing drum 3;

[0044] The stirring assembly 4 is arranged inside the mixing barrel 3. The stirring assembly 4 can perform preliminary stirring and mixing on the materials in the mixing barrel 3. An annular scraper 9 is arranged inside the mixing barrel 3. The outer wall of the annular scraper 9 is in contact with the inner wall of the mixing barrel 3. The power assembly 5 is arranged on the top of the mixing barrel 3. The moving end of the power assembly 5 is connected to the annular scraper 9. The power assembly 5 can drive the annular scraper 9 to move up and down, thereby reducing the residual material inside the mixing barrel 3 and reducing the waste of material.

[0045] The shearing, grinding, emulsifying and composite dispersing system 6 has a feed pipe 7 fixedly connected to its top. The top of the feed pipe 7 is connected to the discharge port of the ultrasonic disperser 2 to receive the material after ultrasonic dispersion treatment and further process it.

[0046] The ultrasonic disperser 2, stirring component 4, power component 5 and shear grinding emulsification composite dispersion system 6 are all electrically connected to the control system 8 to achieve unified control and parameter adjustment of each component, ensuring efficient and stable operation of the device. In actual production, the staff can accurately set the operating parameters of each component through the control system 8 according to different slurry formulas and production requirements, such as the ultrasonic power and frequency of the ultrasonic disperser 2, the stirring speed of the stirring component 4, the scraper movement frequency of the power component 5, and the operating parameters of each module of the shear grinding emulsification composite dispersion system 6, etc., to ensure that the lead-carbon battery negative electrode slurry that meets the requirements is prepared.

[0047] The stirring assembly 4 includes a stirring rod 401, the top of which is rotatably mounted on the inner top of the mixing barrel 3. The top of the stirring rod 401 passes through the mixing barrel 3 and is connected to a first drive motor 402. Several groups of stirring paddles 403 are fixedly connected to the outer wall of the stirring rod 401. The first drive motor 402 is fixedly mounted on the top of the mixing barrel 3. One end of the output shaft of the first drive motor 402 is fixedly connected to the top of the stirring rod 401. When the first drive motor 402 is started, the output shaft drives the stirring rod 401 to rotate at high speed, thereby rotating the stirring paddles 403 together, stirring the materials in the mixing barrel 3. During the stirring process, the stirring paddles 403 can promote the circulation of the materials in the mixing barrel 3, achieving preliminary mixing of the materials and preparing for subsequent processes such as ultrasonic dispersion. For example, after adding raw materials such as lead powder and activated carbon, starting the stirring assembly 4 and setting an appropriate stirring speed and time can ensure that the various raw materials are initially mixed evenly, improving the efficiency and effectiveness of subsequent processing. The stirring speed can be adjusted according to the characteristics of the material and the difficulty of mixing. It can generally be adjusted within the range of 100-500rpm. The stirring time is usually 5-15 minutes to achieve a better initial mixing effect.

[0048] The power assembly 5 includes a support frame 501, which is fixedly connected to the mixing barrel 3. A screw rod 502 is rotatably mounted on the support frame 501. The top of the screw rod 502 passes through the support frame 501 and is connected to a second drive motor 503. A movable connecting frame 504 is provided on the outer wall of the screw rod 502. The bottom end of the movable connecting frame 504 is connected to the annular scraper 9. The movable connecting frame 504 includes a movable plate 5041, which is threadedly connected to the outer wall of the screw rod 502. The bottom of the movable plate 5041 is fixedly connected to two sets of connecting rods 5042. The bottom ends of the connecting rods 5042 pass through the mixing barrel 3 and are fixedly connected to the top of the annular scraper 9. When the second drive motor 503 is started, it drives the screw 502 to rotate. Since the movable plate 5041 is threadedly connected to the screw 502, under the rotation of the screw 502, the movable plate 5041 will move up and down along the screw 502, and then drive the annular scraper 9 to slide up and down along the inner wall of the mixing barrel 3 through the connecting rods 5042. During the movement, the annular scraper 9 can scrape off the material attached to the inner wall of the mixing barrel 3, avoiding material residue and improving material utilization. It also helps to ensure the consistency of the slurry quality each time it is produced. For example, after each production or during the production process, the power component 5 can be started regularly to allow the annular scraper 9 to move up and down several times, which can effectively remove the material on the barrel wall. The frequency and amplitude of the scraper movement can be adjusted according to the actual material residue situation. For example, it can be started once every certain time (such as 30 minutes). The stroke of each movement can be set according to the height of the mixing barrel 3. Generally, it can be set that the annular scraper 9 moves from the top of the mixing barrel 3 to the bottom and then returns to the top as one stroke.

[0049] A guide sleeve 10 is fixedly embedded on the top of the mixing barrel 3, and the connecting rod 5042 is slidably inserted into the inside of the guide sleeve 10. By setting the guide sleeve 10 and the connecting rod 5042 for use in conjunction, the annular scraper 9 is limited, making its movement process more stable.

[0050] The composite dispersion system 6 includes a box body 601, which is fixedly connected to the bottom end of the feed pipe 7. A guide hopper 602 is fixedly installed inside the box body 601. A shearing module 603 is provided above the guide hopper 602 in the box body 601. A grinder 604 is fixedly connected to the bottom of the guide hopper 602. The shearing module 603 includes two sets of rotating shafts 6031. The two ends of the two sets of rotating shafts 6031 are rotatably mounted on the inner walls of the two sides of the box body 601. One end of each set of rotating shafts 6031 passes through the box body 601 and is connected to the gear transmission group 60 32, one set of rotating shafts 6031 serves as the driving shaft, extending through the housing 601 and connected to a third drive motor 6033. Cutter blades 6034 are fixedly attached to the outer walls of both sets of rotating shafts 6031. When the third drive motor 6033 is activated, it drives the driving shaft to rotate, and the two sets of rotating shafts 6031 rotate synchronously in opposite directions via the gear transmission assembly 6032. The cutters 6034 rotate along with the rotating shafts 6031, shearing the material entering the housing 601 and breaking larger particles into smaller ones in preparation for subsequent grinding and emulsification. The sheared material passes through the guide hopper 602 and enters the grinder 604, which is fixedly connected to the bottom, for grinding and emulsification. The grinder 604 can use suitable grinding media and grinding methods, such as ball milling or sand milling, to further refine and emulsify the material particles, making the various components in the slurry more evenly dispersed and improving the quality of the slurry. In practical applications, the speed of the third drive motor 6033 can be adjusted based on the slurry's characteristics and the desired dispersion effect. Typically, the speed can be between 1000 and 5000 rpm to control the shear force and effect. The grinder 604 can also adjust parameters such as the grinding time, type and amount of grinding media, and so on. For example, the grinding time can be set between 10 and 30 minutes to meet the preparation requirements of different slurries.

[0051] It also includes a discharge pipe 11, which is fixedly connected to the grinder 604 to facilitate the addition of raw materials such as lead powder, carbon black, conductive agent and binder into the mixing barrel 3. A feed pipe 12 is fixedly connected to the outer wall of the mixing barrel 3. The lead-carbon battery negative electrode slurry after a series of treatments is discharged through the discharge pipe 11 and can be directly collected for subsequent battery production processes.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion, characterized in that: The following steps are involved: Step 1: Lead powder, carbon black, conductive agent and binder are added into the mixing barrel (3) through the feed pipe (12) according to the formula ratio, and then the first drive motor (402) is started to drive the stirring rod (401) and the stirring paddle (403) to rotate, and the materials in the mixing barrel (3) are preliminarily stirred and mixed. The stirring speed is 100-300 rpm and the stirring time is 5-10 minutes to make the materials preliminarily dispersed evenly, thereby forming a negative electrode material mixture; Step 2: Start the second drive motor (503) to drive the screw (502) to rotate, so that the movable plate (5041) moves up and down along the screw (502), and drives the annular scraper (9) to slide up and down along the inner wall of the mixing barrel (3) through the connecting rod (5042), thereby removing the negative electrode material mixture adhering to the barrel wall and discharging it; Step 3: The negative electrode material mixture then enters the ultrasonic disperser (2), and the power is set to 200-500W and the frequency is set to 20-40kHz. The material in the mixing barrel (3) is ultrasonically dispersed for 15-30 minutes, and the ultrasonic cavitation effect is used to break up the material agglomerates; Step 4: After the ultrasonic dispersion is completed, the negative electrode material mixture enters the housing (601) of the composite dispersion system (6) through the feed pipe (7), and then the third drive motor (6033) is started, which drives the two sets of rotating shafts (6031) and the cutter (6034) to rotate in opposite directions through the gear transmission group (6032) to shear the material. The shearing speed is 3000-8000 rpm and the shearing time is 10-20 minutes. Step 5: The sheared negative electrode material mixture enters the grinder (604) through the guide hopper (602) for grinding and emulsification. The grinding gap of the grinder (604) is 5-20 μm, the grinding pressure is 0.5-2 MPa, and the grinding time is 20-40 minutes, so that the material particles are further refined and evenly dispersed. Step 6: The negative electrode slurry after grinding and emulsification is discharged and collected through the discharge pipe (11), and the solid content, viscosity, particle size distribution and other indicators of the slurry are tested and adjusted to meet the production requirements of lead-carbon batteries.

2. An apparatus for preparing lead-carbon battery negative electrode slurry by combined dispersion of ultrasound and high-speed shearing, characterized in that: include: A support frame (1) is fixedly mounted with an ultrasonic disperser (2) on its top, a mixing cylinder (3) is arranged above the ultrasonic disperser (2), and the bottom of the mixing cylinder (3) is communicated with the top feed port of the ultrasonic disperser (2); A stirring assembly (4) is arranged inside the mixing barrel (3), and an annular scraper (9) is arranged inside the mixing barrel (3), and the outer wall of the annular scraper (9) is in contact with the inner wall of the mixing barrel (3); A power assembly (5) is arranged on the top of the mixing barrel (3), and the movable end of the power assembly (5) is connected to the annular scraper (9), and the annular scraper (9) can be moved up and down to reduce the material residue inside the mixing barrel (3); A shearing, grinding, emulsifying and composite dispersing system (6) is fixedly connected to a feed pipe (7) at the top thereof, and the top end of the feed pipe (7) is connected to the discharge port of the ultrasonic disperser (2); The control system (8) is electrically connected to the ultrasonic disperser (2), the stirring component (4), the power component (5) and the shear grinding emulsification composite dispersion system (6).

3. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 1, characterized in that: The stirring assembly (4) comprises a stirring rod (401), the top end of which is rotatably mounted on the inner top of the mixing barrel (3), the top end of which passes through the mixing barrel (3) and is connected to a first drive motor (402), and a plurality of stirring paddles (403) are fixedly connected to the outer wall of the stirring rod (401).

4. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 3, characterized in that: The first drive motor (402) is fixedly mounted on the top of the mixing barrel (3), and one end of the output shaft of the first drive motor (402) is fixedly connected to the top end of the stirring rod (401).

5. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 1, characterized in that: The power assembly (5) comprises a support frame (501), the support frame (501) is fixedly connected to the mixing barrel (3), a screw rod (502) is rotatably mounted on the support frame (501), the top end of the screw rod (502) passes through the support frame (501) and is connected to a second drive motor (503), a movable connecting frame (504) is provided on the outer wall of the screw rod (502), and the bottom end of the movable connecting frame (504) is connected to the annular scraper (9).

6. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 5, characterized in that: The movable connecting frame (504) includes a movable plate (5041), which is threadedly connected to the outer wall of the screw rod (502). Two groups of connecting rods (5042) are fixedly connected to the bottom of the movable plate (5041), and the bottom ends of the connecting rods (5042) pass through the mixing barrel (3) and are fixedly connected to the top of the annular scraper (9).

7. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 6, characterized in that: A guide sleeve (10) is fixedly embedded on the top of the mixing cylinder (3), and the connecting rod (5042) is slidably inserted into the interior of the guide sleeve (10).

8. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 1, characterized in that: The composite dispersion system (6) includes a box (601), the box (601) is fixedly connected to the bottom end of the feed pipe (7), a guide hopper (602) is fixedly installed inside the box (601), a shearing module (603) is provided above the box (601) and the bottom of the guide hopper (602) is fixedly connected to a grinder (604).

9. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 1, characterized in that: The shearing module (603) includes two groups of rotating shafts (6031), the two ends of which are rotatably mounted on the inner walls of the box (601) on both sides, and one end of each of the two groups of rotating shafts (6031) passes through the box (601) and is connected to a gear transmission group (6032). One group of the rotating shafts (6031) serves as a driving shaft, passes through the box (601) and is connected to a third driving motor (6033), and a cutter (6034) is fixedly connected to the outer walls of each of the two groups of rotating shafts (6031).

10. The device for preparing lead-carbon battery negative electrode slurry by ultrasonic and high-speed shear composite dispersion according to claim 9, characterized in that: It also includes a discharge pipe (11), which is fixedly connected to the grinder (604), and a feed pipe (12) is fixedly connected to the outer wall of the mixing cylinder (3).

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