A system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries

Abstract

This invention relates to the field of negative electrode lead paste preparation technology, specifically to a system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries. It includes a hopper located below a paste-mixing machine, the hopper fixed to a support frame, a water tank fixed to a support frame on one side of the hopper, a first sealing plate slidably disposed within the support frame below the hopper, and a second sealing plate elastically slidably disposed within the support frame below the water tank. An inner plate is installed within the first sealing plate, and an elongated groove is formed on the inner plate. An insert is slidably and sealingly inserted into the groove, and an elastic element is fixed to the lower end of the insert. The lower end of the elastic element is fixedly connected to a lifting plate, which is fixedly connected to a connecting rod. During the upward movement of the lifting plate, elastic element, and insert, the clumps of lead paste clogging the lower end of the hopper can be broken up. The rotation of the inner plate causes the lifting plate, elastic element, and insert to move intermittently upward, increasing the breaking area of ​​the clumps and improving the unclogging effect.

Description

Technical Field

[0001] This invention relates to the field of negative electrode lead paste preparation technology, specifically to a system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries. Background Technology

[0002] Compared to lithium batteries, lead-acid batteries have a wider operating temperature range, functioning normally within -40℃ to 60℃. However, as the temperature decreases, the discharge capacity of lead-acid batteries gradually diminishes. Therefore, improving the discharge capacity of batteries in low-temperature environments is an important direction in battery research.

[0003] In the preparation of negative electrode lead paste, lignin and humic acid are added to increase the capacity of the negative electrode plate at low temperatures and prevent the formation of the lead sulfate passivation layer, thereby ensuring a higher plate capacity. Effective stirring of the negative electrode lead paste is required during preparation, and the prepared paste can be directly transferred to a coating machine for coating operations. In some existing negative electrode lead paste preparation systems, the flow channels of the lead paste are prone to blockage after equipment shutdown, requiring manual unblocking, which is inconvenient. Summary of the Invention

[0004] The main objective of this invention is to provide a low-temperature resistant negative electrode lead paste preparation system for power lead-acid batteries that facilitates stirring of lead paste, automatically clears the flow channels of lead paste, and facilitates cleaning of the flow channels of lead paste.

[0005] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0006] A system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries includes a hopper located below a paste mixing machine, the hopper being fixed to a support, and a water tank fixed to a support on one side of the hopper. The hopper and water tank have openings at their lower ends. A first sealing plate is slidably disposed within the support below the hopper, with its upper end slidably and sealingly connected to the lower end of the hopper. A second sealing plate is elastically and slidably disposed within the support below the water tank, with its upper end slidably and sealingly connected to the lower end of the water tank. An inner plate is installed within the first sealing plate, and a long groove is formed on the inner plate. An insert is slidably and sealingly inserted into the long groove, with an elastic element fixed to its lower end. The lower end of the elastic element is fixedly connected to a lifting plate, which is fixedly connected to a connecting rod. The elastic element includes two elastic plates. After the lifting plate is positioned within the long groove, it makes sealing contact with the groove wall. An inverted U-shaped inner plate is fixed within the water tank, with a first one-way valve and a second one-way valve respectively fixedly and sealingly installed in openings at the midpoints of the two vertical sections of the inner plate. The opening of the second one-way valve is connected to the pipeline, which is connected to the spray assembly at the top of the hopper. After the first sealing plate moves to the bottom of the water tank, it can seal the bottom of the water tank. After the inner plate aligns with the long trough, the insert, elastic element and lifting plate can enter the interior of the inner plate after moving upward. After the insert, elastic element and lifting plate enter the interior of the inner plate, the two ends of the insert, the two ends of the elastic element and the two ends of the lifting plate respectively seal and contact the two vertical parts of the inner plate. After the insert is pressed against the flat part at the top of the inner plate, as the lifting plate continues to move upward, the middle part of the two elastic pieces bends and moves away from each other. The storage cavity formed by the insert, the two elastic pieces, the lifting plate and the two vertical parts of the inner plate is connected to the opening of the first one-way valve installed inside. As the lifting plate continues to move upward, the water in the water tank enters the storage cavity through the first one-way valve. When the lifting plate moves downward, the space of the storage cavity decreases, and the water in the storage cavity enters the spray assembly through the second one-way valve, the first pipeline and the second pipeline.

[0007] Specifically, the upper ends of the two elastic sheets are fixedly connected to the lower ends of the insert strip, and the lower ends of the two elastic sheets are fixedly connected to the upper ends of the lifting plate; after the elastic element is located in the long groove, the elastic element is in sealed contact with the groove wall of the long groove.

[0008] Specifically, the first sealing plate is connected to the bracket via a telescopic rod.

[0009] Specifically, a slide is fixed to the lower end of the inner plate, and the elastic element and the lifting plate are slidably arranged inside the slide.

[0010] Specifically, the lower end of the inner disk is provided with a drive assembly capable of driving the connecting rod to move up and down; the drive assembly includes a first motor fixed at the lower end of the inner disk, and a reciprocating screw is concentrically fixed on the output shaft of the first motor. The reciprocating screw, the connecting rod, and the balls inside the connecting rod constitute a ball screw pair.

[0011] Specifically, the inner disk is rotatably and sealed to the first sealing plate, and the first sealing plate is provided with a driving device for driving the inner disk to rotate; the driving device includes a second gear ring concentrically fixed on the inner disk, a second motor fixed on the first sealing plate, and a second gear concentrically fixed on the output shaft of the second motor, the second gear meshing with the second gear ring.

[0012] Specifically, the spray assembly includes a ring pipe located above the hopper, which is fixedly connected to the outer wall of the hopper by a third fixing member. Multiple nozzles are evenly distributed and fixedly connected to the lower end of the ring pipe, and the water sprayed from the nozzles can wash the inner wall of the hopper. The pipeline includes a first pipe and a second pipe. One end of the second pipe is connected to the ring pipe, and the other end of the second pipe is connected to the first pipe. The first pipe is connected to an opening in which a second one-way valve is fixedly and sealed.

[0013] Specifically, the hopper is fixedly connected to the bracket by multiple first fixing parts, the water tank is fixedly connected to the bracket by multiple second fixing parts, a slide is provided inside the bracket, the first sealing plate and the second sealing plate are slidably disposed in the slide, and the second sealing plate is connected to the bracket by a spring.

[0014] Specifically, the inner plate is fixed inside the water tank by a fixing rod, and a groove is provided at the lower end of the straight part of the inner plate.

[0015] Specifically, a heating element is fixed inside the side wall of the hopper, a first gear ring is concentrically rotatably connected to the upper end of the hopper, a pneumatic motor is fixed to the outside of the hopper, a first gear is concentrically fixed on the output shaft of the pneumatic motor, the first gear meshes with the first gear ring, a scraper is fixed to the lower end of the first gear ring, and the scraper slides in contact with the inner wall of the hopper.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. During the upward movement of the lifting plate, elastic element and insert bar, the clumps of lead paste at the bottom of the clogging hopper can be broken up. The rotation of the inner disc causes the lifting plate, elastic element and insert bar to move upward intermittently, which can increase the breaking area of ​​the clumps of lead paste and improve the unblocking effect.

[0018] 2. By setting up spray components and scrapers, the inside of the hopper can be easily cleaned.

[0019] 3. As the elastic element continues to move upward through the long groove, the insert is blocked by the clump of lead paste above it. As the lifting plate continues to move upward, the middle of the two elastic plates bends and moves away from each other. During the downward movement of the lifting plate, the two elastic plates return to their original state. During the return process of the two elastic plates, the lead paste located on the two elastic plates can be squeezed by the two elastic plates, which can improve the crushing efficiency of the lead paste.

[0020] 4. After the first sealing plate moves to the lower end of the water tank, it can seal the lower end of the water tank. After the inner plate aligns with the long groove, the insert, elastic element and lifting plate can enter the inner plate after moving upward. After the insert, elastic element and lifting plate enter the inner plate, the two ends of the insert, the two ends of the elastic element and the two ends of the lifting plate respectively seal and contact the two vertical parts of the inner plate. After the insert is pressed against the flat part at the upper end of the inner plate, as the lifting plate continues to move upward, the middle part of the two elastic pieces bends and moves away from each other. The storage cavity formed by the insert, the two elastic pieces, the lifting plate and the two vertical parts of the inner plate is connected to the opening with the first one-way valve installed inside. As the lifting plate continues to move upward, the water in the water tank enters the storage cavity through the first one-way valve. When the lifting plate moves downward, the space of the storage cavity decreases. The water in the storage cavity enters the spray assembly through the second one-way valve, the first pipe and the second pipe, which can transport the water in the water tank to the spray assembly. Attached Figure Description

[0021] Figure 1 This is a front view of the present invention.

[0022] Figure 2 This is a schematic diagram of the hopper and water tank.

[0023] Figure 3 This is a schematic diagram of the first and second sealing plates inside the support.

[0024] Figure 4 This is a cross-sectional view of the hopper and water tank.

[0025] Figure 5 This is a cross-sectional view of the first cover plate.

[0026] Figure 6 This is a sectional view of the carriage.

[0027] Figure 7 A schematic diagram showing the cooperation between the insert, the elastic element, and the lifting plate.

[0028] Figure 8 This is a schematic diagram of the internal structure of the water tank.

[0029] Figure 9 This is a sectional view of the inner panel.

[0030] Figure 10 This is a schematic diagram showing the two elastic sheets bending and moving away from each other in the middle after the insert is blocked by the clump of lead paste above it.

[0031] Figure 11 This is a schematic diagram of the expansion of the reservoir.

[0032] Figure 12 This is a schematic diagram showing the bending of the elastic sheet after the insert is inserted into the groove.

[0033] The components in the attached diagram are named as follows: 1. Paste mixing machine; 2. Support frame; 3. Hopper; 4. Heating element; 5. First fixing component; 6. First gear ring; 7. Scraper; 8. First gear; 9. Slide rail; 10. First sealing plate; 11. Inner plate; 12. Second gear ring; 13. Second gear; 14. Second motor; 15. Long groove; 16. Slide frame; 17. Lifting plate; 18. Elastic sheet; 19. Insert strip; 20. First motor; 21. Reciprocating screw; 22. Water tank; 23. Second fixing component; 24. Second sealing plate; 25. Spring; 26. Inner plate; 27. Fixing rod; 28. Groove; 29. ​​First one-way valve; 30. Second one-way valve; 31. First pipe; 32. Second pipe; 33. Ring pipe; 34. Third fixing component; 35. Nozzle; 36. Connecting rod. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] like Figures 1-12 As shown, a low-temperature resistant power lead-acid battery negative electrode lead paste preparation system includes a hopper 3 located below a paste mixing machine 1. The hopper 3 is fixed to a support 2, and a water tank 22 is fixed to one side of the support 2. The lower ends of the hopper 3 and the water tank 22 are open. Specifically, the hopper 3 is fixedly connected to the support 2 by multiple first fixing members 5, and the water tank 22 is fixedly connected to the support 2 by multiple second fixing members 23.

[0036] A heating element 4 is fixed inside the side wall of the hopper 3.

[0037] The upper end of the hopper 3 is concentrically connected to the first toothed ring 6. A pneumatic motor is fixed on the outside of the hopper 3. A first gear 8 is concentrically fixed on the output shaft of the pneumatic motor. The first gear 8 meshes with the first toothed ring 6. A scraper 7 is fixed at the lower end of the first toothed ring 6. The scraper 7 slides in contact with the inner wall of the hopper 3.

[0038] A first sealing plate 10 is slidably disposed inside the support 2 below the hopper 3, and the upper end of the first sealing plate 10 is slidably and sealingly connected to the lower end of the hopper 3. A second sealing plate 24 is elastically and slidably disposed inside the support 2 below the water tank 22, and the upper end of the second sealing plate 24 is slidably and sealingly connected to the lower end of the water tank 22.

[0039] Specifically, a slide rail 9 is provided inside the bracket 2, and the first sealing plate 10 and the second sealing plate 24 are slidably disposed within the slide rail 9. The second sealing plate 24 is connected to the bracket 2 by a spring 25. The first sealing plate 10 is connected to the bracket 2 by a telescopic rod.

[0040] An inner plate 11 is installed inside the first sealing plate 10. The inner plate 11 is rotatably and sealingly connected to the first sealing plate 10, and a drive device for driving the inner plate 11 to rotate is provided on the first sealing plate 10.

[0041] The drive device includes a second gear ring 12 concentrically fixed on the inner plate 11, a second motor 14 fixed on the first sealing plate 10, and a second gear 13 concentrically fixed on the output shaft of the second motor 14, the second gear 13 meshing with the second gear ring 12.

[0042] An elongated groove 15 is provided on the inner plate 11. An insert strip 19 is slidably and sealedly inserted into the elongated groove 15. An elastic element is fixed at the lower end of the insert strip 19. The lower end of the elastic element is fixedly connected to the lifting plate 17. The lifting plate 17 is fixedly connected to the connecting rod 36. The elastic element includes two elastic plates 18.

[0043] After the lifting plate 17 is located inside the long groove 15, the lifting plate 17 makes sealed contact with the groove wall of the long groove 15. After the elastic element is located inside the long groove 15, the elastic element makes sealed contact with the groove wall of the long groove 15.

[0044] Specifically, the upper ends of the two elastic sheets 18 are fixedly connected to the lower ends of the insert strip 19, and the lower ends of the two elastic sheets 18 are fixedly connected to the upper ends of the lifting plate 17.

[0045] The lower end of the inner plate 11 is fixed with a slide 16, and the elastic element and the lifting plate 17 are slidably arranged in the slide 16.

[0046] The lower end of the inner disk 11 is provided with a drive assembly capable of driving the connecting rod 36 to move up and down. The drive assembly includes a first motor 20 fixed at the lower end of the inner disk 11, and a reciprocating screw 21 is concentrically fixed on the output shaft of the first motor 20. The reciprocating screw 21, the connecting rod 36 and the balls in the connecting rod 36 constitute a ball screw pair.

[0047] An inverted U-shaped inner plate 26 is fixed inside the water tank 22. Specifically, the inner plate 26 is fixed inside the water tank 22 by a fixing rod 27. A first one-way valve 29 and a second one-way valve 30 are respectively fixedly and sealed in the openings at the middle positions of the two vertical parts of the inner plate 26. The opening of the second one-way valve 30 is connected to a pipeline, which is connected to the spray assembly at the upper end of the hopper 3.

[0048] Specifically, the spray assembly includes an annular pipe 33 located above the hopper 3. The annular pipe 33 is fixedly connected to the outer wall of the hopper 3 by a third fixing member 34. Multiple nozzles 35 are evenly distributed and fixedly connected to the lower end of the annular pipe 33. The water sprayed from the nozzles 35 can wash the inner wall of the hopper 3.

[0049] The pipeline includes a first pipe 31 and a second pipe 32. One end of the second pipe 32 is connected to the ring pipe 33, and the other end of the second pipe 32 is connected to the first pipe 31. The first pipe 31 is connected to an opening in which a second one-way valve 30 is fixedly and sealed.

[0050] The paste mixing machine 1 delivers lead paste into the hopper 3. Lignin and humic acid are added to the lead paste in the hopper 3 to increase the capacity of the negative electrode plate under low temperature conditions. After adding lignin and humic acid to the lead paste in the hopper 3, the pneumatic motor is started. The engagement of the first gear 8 and the first gear ring 6 causes the scraper 7 to rotate, thereby stirring the lead paste in the hopper 3.

[0051] The first motor 20 is started, which drives the reciprocating screw 21 to rotate, thereby causing the connecting rod 36, lifting plate 17, elastic element, and insert bar 19 to move upward. Once the lifting plate 17 is positioned within the long slot 15, the second motor 14 is started. The second motor 14, through the second gear 13 and the second gear ring 12, causes the inner disk 11 to rotate. During the rotation of the inner disk 11, the connecting rod 36, lifting plate 17, elastic element, and insert bar 19 also rotate. As the inner disk 11 rotates, the insert bar 19 and elastic element can stir the lead paste in the hopper 3. After the heating element 4 is started, it can heat the lead paste in the hopper 3.

[0052] Since the lifting plate 17 is located inside the long groove 15, the lifting plate 17 is in sealed contact with the groove wall of the long groove 15. After the elastic element is located inside the long groove 15, the elastic element is in sealed contact with the groove wall of the long groove 15. During the upward movement of the insert 19 and the elastic element, and when the insert 19 and the elastic element stir the lead paste in the hopper 3, the lead paste can be prevented from flowing out of the long groove 15.

[0053] Activate the telescopic rod to move the first sealing plate 10 away from the second sealing plate 24, thereby opening the lower end of the hopper 3. After the lower end of the hopper 3 is opened, the lead paste in the hopper 3 is discharged into the coating machine.

[0054] When lead paste clumps form in the lower part of hopper 3 due to equipment shutdown, starting the first motor 20 causes the lifting plate 17, elastic element, and insert bar 19 to move upwards, piercing and breaking up the clumped lead paste blocking the lower part of hopper 3. Starting the second motor 14 causes the inner disc 11 to rotate, intermittently moving the lifting plate 17, elastic element, and insert bar 19 upwards, increasing the breaking area of ​​the clumped lead paste and improving the unblocking effect. After the lower layer of clumped lead paste is broken up, the telescopic rod is activated, causing the first sealing plate 10 to move away from the second sealing plate 24, discharging the broken lead paste from the lower part of hopper 3. The upper layer of clumped lead paste moves downwards and approaches the inner disc 11, and then the lifting plate 17, elastic element, and insert bar 19 continue to break up the clumped lead paste above the inner disc 11.

[0055] When the clumped lead paste at the lower end of the clogged hopper 3 is pierced and crushed, as the elastic element continues to move upward through the long groove 15, the insert 19 is blocked by the clumped lead paste above it. As the lifting plate 17 continues to move upward, the two elastic plates 18 bend in the middle and move away from each other. During the downward movement of the lifting plate 17, the two elastic plates 18 return to their original position. During the return process of the two elastic plates 18, the lead paste located on the two elastic plates 18 can be squeezed by the two elastic plates 18, which can improve the crushing efficiency of the lead paste.

[0056] When it is necessary to clean the hopper 3, the scraper 7 is rotated, and the scraper 7 can scrape off the lead paste adhering to the inner wall of the hopper 3.

[0057] After the telescopic rod is activated, the first sealing plate 10 moves to the lower end of the water tank 22 and seals the lower end of the water tank 22. At this time, the second sealing plate 24 moves away from the water tank 22 and compresses the spring 25. After the inner plate 26 aligns vertically with the long groove 15, the insert 19, the elastic element, and the lifting plate 17 move upward and enter the interior of the inner plate 26. After the insert 19, the elastic element, and the lifting plate 17 enter the interior of the inner plate 26, the two ends of the insert 19, the two ends of the elastic element, and the two ends of the lifting plate 17 respectively seal and contact the two vertical parts of the inner plate 26. After the insert 19 presses against the flat part at the upper end of the inner plate 26, as the lifting plate 17 continues to move upward, the middle of the two elastic pieces 18 bends and moves away from each other. Since the lower end of the flat part of the inner plate 26 has a groove 28, the insert 19 can be inserted into the groove 28. When the middle of the two elastic pieces 18 bends and moves away from each other, the stability of the insert 19 is ensured.

[0058] The storage cavity, formed by the insert 19, two elastic plates 18, lifting plate 17, and the two vertical sections of the inner plate 26, is connected to an opening with a first one-way valve 29 installed inside. As the lifting plate 17 moves upward, the volume of the storage cavity increases, and water from the water tank 22 enters the storage cavity through the first one-way valve 29. When the lifting plate 17 moves downward, the space of the storage cavity decreases, and the water in the storage cavity enters the spray assembly through the second one-way valve 30, the first pipe 31, and the second pipe 32. The water entering the spray assembly is sprayed out through the nozzle 35 and washes the inner wall of the hopper 3. With the intermittent up-and-down movement of the lifting plate 17, the volume of the storage cavity intermittently increases and decreases, and water from the water tank 22 continuously enters the spray assembly.

[0059] After the inner wall of the hopper 3 is flushed, the insert 19, elastic element, lifting plate 17 and connecting rod 36 are restored. The telescopic rod is activated to restore the first sealing plate 10. After the first sealing plate 10 is restored, the second sealing plate 24 is restored under the elastic force of the spring 25.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries, comprising a hopper (3) located below a paste mixing machine (1), the hopper (3) being fixed on a support (2), a water tank (22) being fixed on the support (2) on one side of the hopper (3), and openings at the lower ends of the hopper (3) and the water tank (22), characterized in that, A first sealing plate (10) is slidably installed in the bracket (2) below the hopper (3). The upper end of the first sealing plate (10) is slidably and sealed to the lower end of the hopper (3). A second sealing plate (24) is elastically and slidably installed in the bracket (2) below the water tank (22). The upper end of the second sealing plate (24) is slidably and sealed to the lower end of the water tank (22). An inner plate (11) is installed in the first sealing plate (10). A long groove (15) is opened on the inner plate (11). A strip (19) is slidably and sealed in the long groove (15). An elastic element is fixed at the lower end of the strip (19). The lower end of the elastic element is fixedly connected to the lifting plate (17). The lifting plate (17) is fixedly connected to the connecting rod (36). The lower end of the inner plate (11) is provided with a drive assembly that can drive the connecting rod (36) to move up and down. The elastic element includes two elastic plates (18). After the lifting plate (17) is located in the long groove (15), the lifting plate (17) is in sealed contact with the groove wall of the long groove (15). The water tank (22) is fixed with an inverted U-shaped inner plate (26). The openings in the middle of the two vertical parts of the inner plate (26) are respectively fixedly and sealed with a first one-way valve (29) and a second one-way valve (30). The opening of the second one-way valve (30) is connected to the pipeline. The pipeline is connected to the material. The spray assembly at the top of the bucket (3) is connected. After the first sealing plate (10) moves to the bottom of the water tank (22), it can seal the bottom of the water tank (22). After the inner plate (26) and the long groove (15) are aligned vertically, the insert (19), elastic element and lifting plate (17) can enter the interior of the inner plate (26) after moving upward. After the insert (19), elastic element and lifting plate (17) enter the interior of the inner plate (26), the two ends of the insert (19), the two ends of the elastic element and the two ends of the lifting plate (17) respectively seal and contact the two vertical parts of the inner plate (26). After the insert (19) is pressed against the flat part at the top of the inner plate (26), As the lifting plate (17) continues to rise, the middle of the two elastic plates (18) bends and moves away from each other. The storage cavity formed by the insert (19), the two elastic plates (18), the lifting plate (17) and the two vertical parts of the inner plate (26) is connected to the opening of the first one-way valve (29) installed inside. As the lifting plate (17) continues to rise, the water in the water tank (22) enters the storage cavity through the first one-way valve (29). When the lifting plate (17) descends, the space of the storage cavity decreases, and the water in the storage cavity enters the spray assembly through the second one-way valve (30), the first pipe (31) and the second pipe (32).

2. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The upper ends of the two elastic pieces (18) are fixedly connected to the lower ends of the insert (19), and the lower ends of the two elastic pieces (18) are fixedly connected to the upper ends of the lifting plate (17); after the elastic element is located in the long groove (15), the elastic element is in sealed contact with the groove wall of the long groove (15).

3. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The first sealing plate (10) is connected to the bracket (2) by a telescopic rod.

4. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The lower end of the inner plate (11) is fixed with a slide (16), and the elastic element and the lifting plate (17) are slidably arranged in the slide (16).

5. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The drive assembly includes a first motor (20) fixed at the lower end of the inner disk (11). A reciprocating screw (21) is concentrically fixed on the output shaft of the first motor (20). The reciprocating screw (21), the connecting rod (36), and the balls in the connecting rod (36) constitute a ball screw pair.

6. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The inner disk (11) is rotatably and sealed to the first sealing plate (10). The first sealing plate (10) is provided with a driving device for driving the inner disk (11) to rotate. The driving device includes a second gear ring (12) concentrically fixed on the inner disk (11). A second motor (14) is fixed on the first sealing plate (10). A second gear (13) is concentrically fixed on the output shaft of the second motor (14). The second gear (13) meshes with the second gear ring (12).

7. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The spray assembly includes a ring pipe (33) located above the hopper (3). The ring pipe (33) is fixedly connected to the outer wall of the hopper (3) by a third fastener (34). Multiple nozzles (35) are evenly distributed and fixedly connected to the lower end of the ring pipe (33). Water sprayed from the nozzles (35) can wash the inner wall of the hopper (3). The pipeline includes a first pipe (31) and a second pipe (32). One end of the second pipe (32) is connected to the ring pipe (33), and the other end of the second pipe (32) is connected to the first pipe (31). The first pipe (31) is connected to an opening in which a second one-way valve (30) is fixedly and sealed.

8. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The hopper (3) is fixedly connected to the bracket (2) by a plurality of first fixing parts (5), and the water tank (22) is fixedly connected to the bracket (2) by a plurality of second fixing parts (23). A slide (9) is provided in the bracket (2), and the first sealing plate (10) and the second sealing plate (24) are slidably disposed in the slide (9). The second sealing plate (24) is connected to the bracket (2) by a spring (25).

9. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, The inner plate (26) is fixed inside the water tank (22) by a fixing rod (27), and a groove (28) is provided at the lower end of the straight part of the inner plate (26).

10. The system for preparing negative electrode lead paste for low-temperature resistant power lead-acid batteries according to claim 1, characterized in that, A heating element (4) is fixed inside the side wall of the hopper (3). A first gear ring (6) is concentrically rotatably connected to the upper end of the hopper (3). A pneumatic motor is fixed to the outside of the hopper (3). A first gear (8) is concentrically fixed on the output shaft of the pneumatic motor. The first gear (8) meshes with the first gear ring (6). A scraper (7) is fixed to the lower end of the first gear ring (6). The scraper (7) slides in contact with the inner wall of the hopper (3).

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