A stirring device for hydrogen storage alloy powder slurry in nickel-metal hydride battery negative electrode

Abstract

This invention relates to the field of battery slurry preparation equipment technology, and discloses a stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry, including a double planetary mixer and a cylinder. Two cylinders are fixed on the top of the lifting platform near the double planetary mixer. The telescopic ends of the two cylinders extend in opposite directions to both sides and are fixedly connected to a moving plate. An annular mounting plate is fixed on the side wall of the moving plate near the cylinder. A movable plate is fixedly installed on the side wall of the annular mounting plate near the cylinder. A clamping assembly is installed on the side wall of the movable plate near the cylinder. Two sets of side corner limiting assemblies are horizontally arranged inside the movable plate. This stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry, through the cooperative structure of the double-sided clamping assembly and the four-corner side corner limiting assemblies, achieves automatic centering of the cylinder during the clamping process, effectively solving the eccentricity problem easily caused by manual positioning deviation in traditional stirring equipment.

Description

Technical Field

[0001] This invention relates to the field of battery slurry preparation equipment technology, specifically to a stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry. Background Technology

[0002] In the preparation process of nickel-metal hydride battery anode, hydrogen storage alloy micro powder, water-based binder, conductive additive, and deionized solvent need to be mixed and formulated into a high-solids content vacuum slurry. The uniformity of mixing directly determines the consistency of anode coating and battery cycle life. The industry generally uses a dual planetary vacuum mixer to complete the slurry dispersion and mixing.

[0003] Currently, a Chinese utility model patent (publication number: CN222076481U) discloses a lithium battery kneading dual planetary stirring device, including a diverter body. The diverter body is designed to surround the inner wall of the stirring chamber. The bottom surface of the diverter body is fixedly connected to the output end of the hydraulic cylinder body. Multiple high-pressure nozzles are evenly distributed on the diverter body.

[0004] This device, through a diversion pipe and hydraulic cylinder, can evenly clean the inside of the mixing chamber and thoroughly clean all parts of the chamber. However, during operation, the lifting platform is only equipped with a simple single-sided locking mechanism and lacks a four-sided synchronous clamping and multi-angle centering correction structure. After the cylinder is manually placed on the lifting platform's pushing base, the cylinder is prone to bidirectional displacement, both forward and backward and left and right. When the lifting platform lifts the cylinder upward to fit against the planetary box, it is difficult to keep the cylinder's central axis strictly coaxial with the planetary mixing main shaft. Under eccentric conditions, the planetary mixing blades are prone to continuously scraping the inner wall of the cylinder. In actual production, operators need to repeatedly manually push the cylinder to correct the coaxiality. Each material change and debugging takes a long time and significantly reduces the continuous operating rate of the production line.

[0005] Secondly, the planetary box and the cylinder rely solely on a single flat sealing ring to achieve static compression and sealing, without a slope-triggered synchronous downward pressure compensation sealing mechanism. Conventional sealing relies solely on the lifting platform to lift the cylinder upward to provide sealing pressure. The high-speed planetary agitation of the equipment generates continuous periodic vibration, the compression force gradually decreases, and the sealing gap widens, causing the slurry to overflow outward. Therefore, in view of the core defects of the existing equipment, it is necessary to provide a stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry to solve the above technical problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a stirring device for nickel-hydrogen battery negative electrode hydrogen storage alloy powder slurry. It has the advantages of synchronous clamping and correcting the position of the cylinder from all four sides, ensuring that the stirring main shaft and the cylinder are coaxial, and compensating for sealing gaps and reducing the risk of material spillage and leakage. It solves the problems that the position of the cylinder is easily offset after manual placement, making it impossible to ensure that the cylinder and the stirring main shaft are coaxial, and that conventional sealing structures cannot compensate for gaps, which easily leads to material spillage and leakage due to equipment vibration.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a stirring device for hydrogen storage alloy powder slurry of nickel-hydrogen battery negative electrode, comprising a double planetary mixer and a cylinder, wherein the double planetary mixer is provided with a lifting platform and a planetary box inside, and the cylinder is placed on top of the lifting platform and located directly below the planetary box; Two cylinders are fixed on the top of the lifting platform near the double planetary mixer. The telescopic ends of the two cylinders extend in opposite directions to both sides and are fixedly connected to a movable plate. An annular mounting plate is fixed on the side wall of the movable plate near the cylinder. A movable plate is fixed on the side wall of the annular mounting plate near the cylinder. A clamping assembly is installed on the side wall of the movable plate near the cylinder. Two sets of side corner limiting assemblies are horizontally arranged inside the movable plate. The clamping assembly is located between the two sets of side corner limiting assemblies. The cylinder is located between the two sets of clamping assemblies and the four sets of side corner limiting assemblies. The double-sided clamping and the four-corner synchronous limiting can make the cylinder automatically center and align. An annular plate is fixed at the bottom edge of the planetary box. An annular groove with an opening facing downward is opened inside the annular plate. A pressing component for sealing the top of the cylinder slides along the height direction inside the annular groove. Multiple sets of linkage components are evenly arranged along the circumference inside the annular groove. When the cylinder rises, it can push the linkage components, thereby linking the pressing components to move downward, thereby pressing the top of the cylinder to achieve sealing.

[0008] Furthermore, the fitting and clamping assembly includes a U-shaped arc plate installed on the side wall of the movable plate near the cylinder, with the opening of the U-shaped arc plate facing the cylinder, and multiple rollers rotating evenly inside it via pins.

[0009] Furthermore, two vertically arranged dovetail tenons are fixed on the side wall of the movable plate near the cylinder. The two dovetail tenons are symmetrically arranged on the movable plate. Two vertically arranged mounting blocks are symmetrically fixed on the outer side wall of the U-shaped arc plate. The mounting blocks have dovetail grooves with bottom openings inside. The mounting blocks are installed and connected to the movable plate through the sliding fit between the dovetail tenons and the dovetail grooves.

[0010] Furthermore, each set of the side angle limiting components includes a nut that is fixedly arranged horizontally inside the movable plate. The nut is threaded with a bolt. The operating end of the bolt is located outside the movable plate, and the other end of the bolt is close to the cylinder and is fixed with a ball block. A rubber sleeve is fixed on the surface of the ball block.

[0011] Furthermore, multiple sets of first sliding grooves are evenly formed at the top of the annular groove, and multiple sets of second sliding grooves are evenly formed on the inner sidewall; multiple sets of linkage components are slidably arranged in the annular groove, with the sliding direction facing the axis of the annular plate; each linkage component includes a linkage block, with a first sliding block fixed to the top of the linkage block, and the first sliding block is slidably connected in the first sliding groove; the pressing component includes a pressing ring, which is slidably fitted in the annular groove, with the sliding direction consistent with the height direction of the annular groove; several second sliding blocks are evenly fixed on the inner sidewall of the pressing ring, and the second sliding blocks are slidably connected in the second sliding groove; a fitting ring is fixed along the bottom edge of the pressing ring.

[0012] Furthermore, the sidewalls of the linkage block in both length directions are inclined surfaces, the outer sidewall of the pressure ring is an inclined surface, and the bottom edge of the outer side of the fitting ring is designed with an inner arc groove; an annular block is fixed to the outer edge of the top of the cylinder, the inner sidewall of the annular block is an inclined surface, the inner edge of the top of the cylinder is designed with an arc angle, and the outer edge of the bottom of the annular groove is designed with a chamfer.

[0013] Furthermore, when the cylinder rises to the bottom of the planetary box, the bottom edge of the outer side of the fitting ring abuts against the inner edge of the top of the cylinder; the annular block can extend into the annular groove and abut against the linkage block, which in turn abuts against the lower pressure ring.

[0014] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: This nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry mixing device achieves automatic centering of the cylinder during the clamping process through the coordinated structure of double-sided clamping components and four-corner limiting components. This effectively solves the eccentricity problem caused by manual positioning deviation in traditional mixing equipment, significantly improving the mixing uniformity and equipment operation stability. By linking the cylinder lifting action with the sealing trigger mechanism, the cylinder's own upward stroke drives the linkage component, which in turn drives the downward pressing component to complete the top sealing. No additional power source or complex control logic is required. The structure is simple, reliable, and responsive, ensuring that the mixing chamber is completely sealed during operation. This effectively prevents the escape of volatile components in the slurry and the intrusion of external dust and moisture, ensuring the accuracy of battery material ratio and process consistency. Attached Figure Description

[0015] Figure 1 This is a side-view three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the lifting platform in this invention; Figure 3 This is a schematic diagram of the structure of the cylinder in this invention; Figure 4 This is a schematic diagram of the cylinder structure in this invention; Figure 5 This is a schematic diagram of the fitting and clamping assembly in this invention; Figure 6 This is a schematic diagram of the annular plate in this invention; Figure 7 This is a schematic diagram of the cross-section of the annular groove in this invention; Figure 8 This is a schematic diagram of the linkage block and the lower pressure ring in this invention; Figure 9 This is a schematic diagram of the side cross-section of the cylinder in this invention; Figure 10 for Figure 9 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Double planetary mixer; 11. Lifting platform; 12. Planetary box; 2. Cylinder; 21. Annular block; 22. Arc angle; 3. Cylinder; 31. Moving plate; 32. Annular mounting plate; 4. Movable plate; 41. Dovetail tenon; 5. Fitting clamping assembly; 51. U-shaped arc plate; 52. Roller; 53. Mounting block; 54. Dovetail groove; 6. Side corner limiting assembly; 61. Nut; 62. Bolt; 63. Ball block; 64. Rubber sleeve; 7. Annular plate; 71. Annular groove; 72. Chamfer; 73. First sliding groove; 74. Second sliding groove; 8. Linkage assembly; 81. Linkage block; 82. First sliding block; 9. Pressing assembly; 91. Pressing ring; 92. Second sliding block; 93. Fitting ring. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The present embodiment of a nickel-hydrogen battery negative electrode hydrogen storage alloy powder slurry mixing device includes a double planetary mixer 1 and a cylinder 2. The double planetary mixer 1 is characterized in that: a lifting platform 11 and a planetary box 12 are provided inside the double planetary mixer 1. The double planetary mixer 1 is the main body of the entire mixing equipment. The lifting platform 11 carries the cylinder 2 to achieve up and down lifting. The cylinder 2 is placed on the top of the lifting platform 11 and located directly below the planetary box 12. Two cylinders 3 are fixed on the top of the lifting platform 11 near the side of the double planetary mixer 1. The two cylinders 3 can output horizontal clamping thrust synchronously, providing power for the double-sided clamping structure of the cylinder 2. The telescopic ends of the two cylinders 3 extend in opposite directions to both sides and are fixedly connected to movable plates 31. The telescopic extension of the cylinders 3 synchronously drives the movable plates 31 on both sides to move towards or away from each other, which can clamp and position the cylinder 2. An annular mounting plate 32 is fixed on the side wall of the movable plate 31 near the cylinder 2. The annular mounting plate 32 serves as a mounting carrier, supporting the movable plate 4 and the entire clamping and limiting structure. The annular mounting plate 32 is located near the cylinder 2. A movable plate 4 is fixedly installed on the side wall. A fitting and clamping assembly 5 is installed on the side wall of the movable plate 4 near the cylinder 2. The fitting and clamping assembly 5 fits against the outer wall of the cylinder 2 to achieve radial double-sided clamping of the cylinder 2. Two sets of side corner limiting assemblies 6 are horizontally arranged inside the movable plate 4. The side corner limiting assemblies 6 are positioned from the four corners of the cylinder 2 and cooperate with the double-sided clamping to achieve automatic centering of the cylinder 2. The fitting and clamping assembly 5 is located between the two sets of side corner limiting assemblies 6. The cylinder 2 is located between the two sets of fitting and clamping assemblies 5 and the four sets of side corner limiting assemblies 6. The double-sided clamping and the four corners are synchronously limited, which can make the cylinder 2 automatically center. An annular plate 7 is fixed at the bottom edge of the planetary box 12. The annular plate 7 provides an annular mounting base for the linkage component 8 and the pressing component 9, forming an automatic sealing mechanism for the cylinder opening. An annular groove 71 with its opening facing downward is opened inside the annular plate 7. The annular groove 71 provides radial and vertical bidirectional sliding space for the linkage component 8 and the pressing ring 91. The pressing component 9 for sealing the top of the cylinder 2 slides along its height inside the annular groove 71. The pressing component 9 moves downward to press the top of the cylinder 2, which can seal the stirring chamber. Multiple sets of linkage components 8 are evenly arranged along the circumference inside the annular groove 71. When the cylinder 2 rises, it can push the linkage component 8, thereby linking the pressing component 9 to move downward, thereby pressing the top of the cylinder 2 to achieve sealing.

[0019] Through the above scheme, during the process of the cylinder 2 rising under the drive of the lifting platform 11, its top edge first contacts the linkage component 8, pushing the linkage component 8 to move radially inward along the annular groove 71, thereby triggering the pressing component 9 to move vertically downward along the annular groove 71, so that the bottom of the pressing component 9 is tightly attached to the upper edge of the cylinder 2, which can form an effective seal and prevent the slurry from evaporating or external impurities from entering during the mixing process. At the same time, driven by the cylinder 3, the two moving plates 31 on both sides move towards the cylinder 2, driving the annular mounting plate 32 and the movable plate 4 to approach the cylinder 2, so that the clamping assembly 5 flexibly abuts against the outer wall of the cylinder 2, while the two sets of side corner limiting assemblies 6 respectively position and constrain the cylinder 2 from the four opposite corners, realizing the synergistic effect of double-sided clamping and four-corner limiting. Ensure that the axis of the cylinder 2 always coincides with the center of the planetary box 12 during the mixing process, so as to avoid uneven mixing or equipment vibration caused by eccentricity. The entire clamping and sealing process does not require manual intervention and is easy to operate.

[0020] like Figure 5 The clamping assembly 5 includes a U-shaped arc plate 51 installed on the side wall of the movable plate 4 near the cylinder 2. The inner arc of the U-shaped arc plate 51 matches the outer circle of the cylinder 2, resulting in a large contact area and uniform clamping force. The opening of the U-shaped arc plate 51 faces the cylinder 2, and multiple rollers 52 rotate evenly inside it via pins. The rollers 52 roll in contact with the outer wall of the cylinder 2, and there is no hard friction during the clamping process, thus avoiding scratching the surface of the cylinder 2.

[0021] Two vertically arranged dovetail tenons 41 are fixed on the side wall of the movable plate 4 near the cylinder 2. The dovetail tenons 41 are sliding positioning protrusions that cooperate with the dovetail grooves 54 to realize the detachable installation of the U-shaped arc plate 51. The two dovetail tenons 41 are symmetrically arranged on the movable plate 4. Two vertically arranged mounting blocks 53 are symmetrically fixed on the outer side wall of the U-shaped arc plate 51. The mounting blocks 53 have dovetail grooves 54 with bottom openings inside. The mounting blocks 53 are installed and connected to the movable plate 4 through the sliding cooperation of the dovetail tenons 41 and the dovetail grooves 54. The dovetail tenons 41 and the dovetail grooves 54 have an anti-detachment self-locking effect, so the U-shaped arc plate 51 will not fall off when clamping.

[0022] With the above scheme, when the cylinder 2 is lifted to the working position by the lifting platform 11, the cylinder 3 pushes the movable plate 4 to approach the cylinder 2, and the U-shaped arc plate 51 then fits against the side wall of the cylinder 2. The multiple rollers 52 inside it roll in contact with the surface of the cylinder 2, effectively reducing frictional resistance during the clamping process and avoiding scratching the outer wall of the cylinder 2.

[0023] like Figure 5 Each set of side angle limiting components 6 includes a nut 61 fixedly arranged horizontally inside the movable plate 4. The nut 61 is threaded with a bolt 62. The operating end of the bolt 62 is located outside the movable plate 4, and the other end of the bolt 62 is close to the cylinder 2 and is fixed with a ball block 63. A rubber sleeve 64 is fixed on the surface of the ball block 63. The rubber sleeve 64 not only buffers the clamping impact and prevents rigid contact damage to the surface of the cylinder 2, but also increases the friction to suppress the circumferential slippage of the cylinder 2 during the stirring process, ensuring that it always maintains a stable and centered state during the double planetary stirring process.

[0024] With the above scheme, when the movable plate 4 approaches the cylinder 2 under the drive of the cylinder 3, the four sets of side corner limiting components 6 act synchronously. The ball block 63 wrapped by the rubber sleeve 64 flexibly abuts against the cylinder 2 from the four opposite corners of the outer wall of the cylinder 2. The spherical structure of the ball block 63 can adapt to the slight deviation of the outer contour of the cylinder 2 and realize multi-point self-centering limiting. like Figure 7 , Figure 8 , Figure 9 and Figure 10Multiple sets of first sliding grooves 73 are evenly provided on the top of the annular groove 71. The first sliding grooves 73 restrict the linkage block 81 to move only radially along the annular plate 7. Multiple sets of second sliding grooves 74 are evenly provided on the inner sidewall. The second sliding grooves 74 restrict the pressing ring 91 to only move vertically. The first sliding grooves 73 and the second sliding grooves 74 guide and limit the movement trajectory of the linkage component 8 and the pressing component 9 respectively, so as to avoid deflection or jamming. Multiple sets of linkage components 8 are slidably arranged in the annular groove 71, with the sliding direction facing the axis of the annular plate 7. The linkage component 8 includes a linkage block 81, and a first sliding block 82 is fixed on the top of the linkage block 81. The first sliding block 82 is slidably connected in the first sliding groove 73. The linkage block 81 is a bidirectional inclined surface transmission component. After the cylinder 2 rises and pushes, it slides inward synchronously and presses down the pressing ring 91. The pressing assembly 9 includes a pressing ring 91, which is slidably fitted in an annular groove 71. The sliding direction is consistent with the height direction of the annular groove 71. Several second sliding blocks 92 are uniformly fixed on the inner side wall of the pressing ring 91. The second sliding blocks 92 are slidably connected in the second sliding groove 74. A fitting ring 93 is fixed along the bottom edge of the pressing ring 91. The fitting ring 93 can be made of elastic material and can undergo moderate deformation under the action of downward pressure to fill the gap between the top of the cylinder 2 and the planetary box 12, thereby achieving reliable sealing.

[0025] With the above scheme, when the cylinder 2 rises with the lifting platform 11, its top edge contacts the lower inclined surface of the linkage block 81, pushing the linkage block 81 to slide radially toward the axis of the annular plate 7, and the first sliding block 82 moves synchronously in the first sliding groove 73 to ensure smooth movement. At the same time, the upper inclined surface of the linkage block 81 abuts against the bottom of the lower pressure ring 91, converting the radial thrust into a downward force, driving the lower pressure ring 91 to move vertically downward along the second sliding groove 74, so that the fitting ring 93 is tightly pressed against the upper edge of the cylinder 2; The entire sealing structure requires no additional power source and is automatically triggered by the upward stroke of the cylinder 2 itself. It has a compact structure, responds promptly, and effectively ensures the airtightness of the slurry environment and the consistency of the process during the mixing process.

[0026] Both sides of the linkage block 81 are inclined surfaces in both length directions. The lower inclined surface of the linkage block 81 receives the push of the annular block 21 of the cylinder 2, and the upper inclined surface presses down on the lower pressure ring 91 to complete the force transfer. The outer side wall of the lower pressure ring 91 is inclined, and the bottom edge of the outer side of the fitting ring 93 is designed with an inner arc groove. The outer inclined surface of the lower pressure ring 91 fits with the upper inclined surface of the linkage block 81, which can convert the radial movement into a vertical pressing action. The arc groove matches the arc angle 22 of the cylinder 2 to increase the sealing and fitting area. With the above scheme, when the cylinder 2 rises to the predetermined position, the inner inclined surface of the annular block 21 at its top abuts against the outer inclined surface of the linkage block 81, forming a wedge fit to ensure the smooth transmission of radial thrust. Meanwhile, the outer inclined surface of the pressure ring 91 and the upper inclined surface of the linkage block 81 form another set of inclined surfaces, which continuously drive the pressure ring 91 downward during the inward movement of the linkage block 81.

[0027] like Figure 6 An annular block 21 is fixed on the outer edge of the top of the cylinder 2. The inner wall of the annular block 21 is an inclined surface. The inner edge of the top of the cylinder 2 is designed with an arc angle 22. The inner arc groove at the bottom of the fitting ring 93 fits into the arc angle 22 on the inner side of the top of the cylinder 2, guiding the sealing contact surface to fit along the curved surface and increasing the contact area. The outer edge of the bottom of the annular groove 71 is designed with a chamfer 72. The chamfer 72 at the bottom of the annular groove 71 provides a guide transition for the downward movement of the fitting ring 93, avoiding interference or scratching.

[0028] When the cylinder 2 rises to the bottom of the planetary box 12, the outer bottom edge of the fitting ring 93 abuts against the inner edge of the top of the cylinder 2; the annular block 21 can extend into the annular groove 71 and abut against the linkage block 81, which in turn abuts against the lower pressure ring 91. During the upward movement of the cylinder 2, the annular block 21 gradually pushes the linkage block 81 inward. Under the combined action of the upward oblique push and the downward push of the lower pressure ring 91, the linkage block 81 always maintains a stable force state, which finally drives the fitting ring 93 to complete the sealing fit with the top of the cylinder 2, realizing the sealed connection between the cylinder 2 and the stirring chamber at the output end of the planetary box 12.

[0029] The working principle of the above embodiments is as follows: In the initial state, the cylinder 2 is placed on top of the lifting platform 11 at a low position. Then, the cylinder 3 extends synchronously, driving the two moving plates 31 to move towards each other, so that the moving plate 4 drives the fitting clamping assembly 5 and the side corner limiting assembly 6 to move closer to the cylinder 2. The roller 52 in the fitting clamping assembly 5 rolls and contacts the outer wall of the cylinder 2, and the rubber sleeves 64 of the four sets of side corner limiting assemblies 6 adaptively fit the cylinder 2 from the diagonal position, eliminating the installation gap and ensuring that its central axis is strictly aligned with the stirring shaft of the planetary box 12. After the cylinder 2 is stabilized, the lifting platform 11 drives the cylinder 2 to move upward. When the cylinder 2 rises to near the bottom of the planetary box 12, the annular block 21 at the top of it first contacts the lower inclined surface of the linkage component 8, pushing the linkage block 81 to slide radially inward. As the cylinder 2 continues to move upward, the linkage block 81 converts the radial displacement into a downward thrust on the lower pressure ring 91 through the inclined plate pair, causing the fitting ring 93 to press tightly against the upper edge of the cylinder 2, thus completing the automatic sealing. After the cylinder 2 is fully in place, the double planetary mixer 1 is started, and the planetary box 12 drives the mixing paddle to uniformly mix the hydrogen storage alloy powder slurry in the sealed cavity. After mixing is completed, the lifting platform 11 descends, the cylinder 3 retracts, and each component automatically returns to its initial position under the action of the reset structure or gravity. The cylinder 2 then breaks free from the blocking and clamping state, making it easy to remove manually.

Claims

1. A stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry, comprising a double planetary mixer (1) and a cylinder (2), characterized in that: The dual planetary mixer (1) is equipped with a lifting platform (11) and a planetary box (12) inside. The cylinder (2) is placed on top of the lifting platform (11) and directly below the planetary box (12). Two cylinders (3) are fixed on the top of the lifting platform (11) near the side of the double planetary mixer (1). The telescopic ends of the two cylinders (3) extend in opposite directions to both sides and are fixedly connected to a moving plate (31). An annular mounting plate (32) is fixed on the side wall of the moving plate (31) near the cylinder (2). A movable plate (4) is fixed on the side wall of the annular mounting plate (32) near the cylinder (2). A fitting clamping assembly (5) is installed on the side wall of the movable plate (4) near the cylinder (2). Two sets of side corner limiting assemblies (6) are horizontally arranged inside the movable plate (4). The fitting clamping assembly (5) is located between the two sets of side corner limiting assemblies (6). The cylinder (2) is located between the two sets of fitting clamping assemblies (5) and the four sets of side corner limiting assemblies (6). The planetary box (12) has an annular plate (7) fixed at the bottom edge. The annular plate (7) has an annular groove (71) with the opening facing downward. The annular groove (71) has a pressing component (9) for sealing the top of the cylinder (2) sliding along its height direction. The annular groove (71) has multiple sets of linkage components (8) evenly arranged along the circumference. When the cylinder (2) rises, it can push the linkage component (8), thereby linking the pressing component (9) to move downward, thus pressing the top of the cylinder (2) to achieve sealing.

2. The nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry stirring device according to claim 1, characterized in that: The fitting and clamping assembly (5) includes a U-shaped arc plate (51) installed on the side wall of the movable plate (4) near the cylinder (2). The opening of the U-shaped arc plate (51) faces the cylinder (2), and multiple rollers (52) rotate evenly inside it via pins.

3. The stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry according to claim 2, characterized in that: Two vertically arranged dovetail tenons (41) are fixed on the side wall of the movable plate (4) near the cylinder (2). The two dovetail tenons (41) are symmetrically arranged on the movable plate (4). Two vertically arranged mounting blocks (53) are symmetrically fixed on the outer side wall of the U-shaped arc plate (51). The mounting blocks (53) have dovetail grooves (54) with bottom openings inside. The mounting blocks (53) are installed and connected to the movable plate (4) through the sliding fit between the dovetail tenons (41) and the dovetail grooves (54).

4. The stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry according to claim 1, characterized in that: Each set of side angle limiting components (6) includes a nut (61) fixedly arranged horizontally inside the movable plate (4), with a bolt (62) threaded inside the nut (61), the operating end of the bolt (62) located outside the movable plate (4), the other end of the bolt (62) close to the cylinder (2), and a ball block (63) fixed thereon, with a rubber sleeve (64) fixed on the surface of the ball block (63).

5. The stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry according to claim 1, characterized in that: Multiple sets of first sliding grooves (73) are evenly provided on the top of the annular groove (71), and multiple sets of second sliding grooves (74) are evenly provided on the inner sidewall. Multiple sets of the linkage components (8) are slidably disposed in the annular groove (71), with the sliding direction facing the axis of the annular plate (7). The linkage component (8) includes a linkage block (81), and a first sliding block (82) is fixed on the top of the linkage block (81). The first sliding block (82) is slidably connected in the first sliding groove (73). The pressing assembly (9) includes a pressing ring (91), which is slidably sleeved in an annular groove (71). The sliding direction is consistent with the height direction of the annular groove (71). Several second sliding blocks (92) are evenly fixed on the inner side wall of the pressing ring (91). The second sliding blocks (92) are slidably connected in the second sliding groove (74). A fitting ring (93) is fixed along the bottom edge of the pressing ring (91).

6. The stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry according to claim 5, characterized in that: The side walls of the linkage block (81) in both length directions are inclined surfaces, the outer side wall of the pressure ring (91) is inclined, and the bottom edge of the outer side of the fitting ring (93) is designed with an inner arc groove. The top outer edge of the cylinder (2) is fixed with an annular block (21), the inner wall of the annular block (21) is an inclined surface, the top inner edge of the cylinder (2) is designed with an arc angle (22), and the bottom outer edge of the annular groove (71) is designed with a chamfer (72).

7. The stirring device for nickel-metal hydride battery negative electrode hydrogen storage alloy powder slurry according to claim 6, characterized in that: When the cylinder (2) rises to the bottom of the planetary box (12), the bottom edge of the outer side of the fitting ring (93) abuts against the inner edge of the top of the cylinder (2), and the annular block (21) can extend into the annular groove (71) and abut against the linkage block (81), and the linkage block (81) abuts against the pressure ring (91).

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