Carbon nanotube conductive paste solid content testing device

Abstract

The invention discloses a carbon nanotube conductive paste solid content testing device, which comprises a testing workbench, a sample introduction mechanism, a heating mechanism, a centrifugal rotation mechanism and a weighing mechanism, the sample introduction mechanism is arranged on the testing workbench, the sample introduction mechanism is used for loading a carbon nanotube conductive paste test sample, the heating mechanism is arranged on the inner side of the bottom of the sample introduction mechanism, and the centrifugal rotation mechanism is used for loading the carbon nanotube conductive paste test sample. The heating mechanism is used for heating and evaporating a carbon nanotube conductive slurry test sample in the sample introduction mechanism, the weighing mechanism is arranged below the sample introduction mechanism and is used for measuring weight data of the carbon nanotube conductive slurry test sample, the centrifugal rotating mechanism is arranged in the sample introduction mechanism and comprises a rotating seat, and the rotating seat is arranged on the rotating seat. The upper portion of the rotating base is of an opening structure, and filter holes are formed in the side edge of the rotating base and provided with filter membranes. The method has the beneficial effects that the test time can be remarkably shortened, and meanwhile, the test accuracy is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of solid content testing of carbon nanotube conductive slurry, and in particular relates to a device for testing the solid content of carbon nanotube conductive slurry. Background Art

[0002] The demand for carbon nanotube conductive paste as a conductive agent for power batteries is increasing rapidly. Improving production efficiency and process inspection efficiency is conducive to improving product capacity. Conductive paste is mainly composed of solid part and solvent. The solid content of conductive paste has a great relationship with the conductive performance. Theoretically, the higher the solid content, the better it is for improving the conductivity of the battery cell. However, when the critical volume solubility is exceeded, the conductivity cannot be improved, but the battery cell capacity will be reduced. Therefore, it is very necessary to accurately determine the solid content of conductive paste.

[0003] According to the different solvents in the conductive paste, it can generally be divided into water-based conductive paste and oily conductive paste, and the oily conductive paste is more commonly used. At present, the common test method for the solid content of oily conductive paste is the drying method. The drying method uses the difference in volatility between the solid matter and the solvent in the conductive paste. When the conductive paste is heated, the solvent will evaporate first, and the solid matter such as the conductive medium will remain. The solvent of the oily conductive paste is composed of N-methylpyrrolidone and a trace amount of water. According to the mass change of the conductive paste, the solid content of the sample to be tested can be calculated. The traditional specific drying method steps are to evenly coat the conductive paste on the foil, and then put it into a blast oven for a long time of high-temperature baking. After baking, weigh and calculate the solid content. However, in the above method, the solvents of the conductive paste are all concentrated together, and it takes a long time to dry the solvent in the conductive paste, which affects the test efficiency. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a carbon nanotube conductive slurry solid content testing device, including a testing workbench, a sample feeding mechanism, a heating mechanism, a centrifugal rotating mechanism and a weighing mechanism. The sample feeding mechanism is arranged on the testing workbench, and the sample feeding mechanism is used to load a carbon nanotube conductive slurry test sample. A heating mechanism is provided on the inner side of the bottom of the sample feeding mechanism, and the heating mechanism is used to heat and evaporate the carbon nanotube conductive slurry test sample in the sample feeding mechanism. A weighing mechanism is provided below the sample feeding mechanism, and the weighing mechanism is used to measure the weight data of the carbon nanotube conductive slurry test sample. The centrifugal rotating mechanism is arranged inside the sample feeding mechanism, and the centrifugal rotating mechanism includes a rotating seat, and the top of the rotating seat is an open structure. The side of the rotating seat is provided with a filter hole, and the filter hole is provided with a filter membrane. The bottom of the rotating seat is connected to a driving rod, and the driving rod extends downward to the bottom of the sample feeding mechanism. The side of the sample feeding mechanism is provided with a driving motor, and the driving motor drives the driving rod to rotate.

[0005] Preferably, the injection mechanism includes an outer shell, a material guide portion is provided on the top of the outer shell, the bottom of the material guide portion extends to the inner side of the rotating seat, a feed pipe is provided on the middle upper part of the material guide portion, a gaseous solvent outlet is provided on the top side of the outer shell, and a liquid solvent outlet is provided on the bottom side of the outer shell.

[0006] Preferably, the weighing mechanism includes a lever device and a pressure sensing device arranged on the inner side of the test workbench, the lever device includes a support and a lever, the upper side of the support is a fulcrum and the support supports the lever through the upper fulcrum, one end of the lever is an action end, the action end is hinged with an action block, the other end of the lever is a load-bearing end, the bottom of the load-bearing end is connected to the bottom of the injection mechanism, the length of the lever arm from the fulcrum to the action end on the lever is smaller than the length of the lever arm from the fulcrum to the load-bearing end on the lever, and the pressure sensing device is fixed to the end inside the test workbench, and the action end applies pressure upward on the pressure sensing device.

[0007] Preferably, a guiding device is provided between the bearing end and the sampling mechanism, and the guiding device includes an inner cover body fixed on the test workbench and an outer cover body slidably mounted on the outside of the inner cover body, the top of the outer cover body is connected to the bottom of the sampling mechanism, and a guide rod is provided at the middle bottom of the outer cover body, and the guide rod extends downward through the inner cover body to the inner side of the test workbench and is connected to a guide plate, a connecting rod is hinged on the guide plate, and the other end of the connecting rod is hinged to the bearing end.

[0008] Preferably, the pressure sensing device includes a fixed plate, a first range elastic member and a second range elastic member, the fixed plate is fixed on the inner wall of the sampling mechanism, a first connecting block is provided at the bottom of the fixed plate, the bottom of the first connecting block is connected to the right end of the first range elastic, the bottom of the left end of the first range elastic member is connected to the top of the right end of the second range elastic member, a second connecting block is provided at the bottom of the right end of the second range elastic member, the bottom of the second connecting block is connected to the first action plate, the top of the left end of the second range elastic member is connected to the third connecting block, the third connecting block is connected to a force transmission plate, the bottom of the other end of the force transmission plate is provided with a force transmission member, the bottom of the force transmission member is connected to an L-shaped plate through the first action plate, the bottom of the L-shaped plate is connected to the second action plate, and pressure blocks are provided on both sides of the second action plate opposite to the first action plate.

[0009] Preferably, the force transmission plate comprises an upper plate and a lower plate, and an elliptical space structure is formed between the upper plate and the lower plate.

[0010] Preferably, a rubber tube is provided in the elliptical space structure, and a rubber ball is provided inside the rubber tube.

[0011] Preferably, a fan blade structure is provided on the outer side of the rotating seat, and the fan blade structure can form an upward airflow as the rotating seat rotates.

[0012] Preferably, the cross-section of the rotating seat is an isosceles trapezoidal structure.

[0013] Preferably, the bottom of the test workbench is provided with a first space portion and a second space portion, the heating mechanism is a heating resistor, the heating resistor is arranged in the first space portion, the bottom of the driving rod and the output end of the driving motor both extend to the second space portion, and a transmission belt is connected between the bottom of the driving rod and the output end of the driving motor.

[0014] The advantages of the present invention are: 1. This scheme combines a heating mechanism and a centrifugal rotating mechanism, and can simultaneously use the principles of heating evaporation and centrifugal separation to remove the solvent part in the carbon nanotube conductive paste. This dual action mechanism significantly improves the efficiency of solvent removal and shortens the solid content test cycle of the carbon nanotube conductive paste. Compared with traditional methods, the device can complete the test in a shorter time.

[0015] 2. In this scheme, the design of the lever device realizes the accurate measurement of the weight change of the injection mechanism. Since the length of the lever arm from the fulcrum to the action end is shorter than the length of the lever arm from the fulcrum to the load-bearing end, according to the lever principle, a small pressure change on the action end can produce a large displacement or force on the load-bearing end, thereby improving the sensitivity and accuracy of the measurement. This design helps to more accurately measure the weight change of the carbon nanotube conductive slurry during heating and centrifugation, and then calculate its solid content.

[0016] 3. The design of the guide device in this solution optimizes the transmission path of force from the injection mechanism to the load-bearing end. The precise matching of the guide rod, guide plate and connecting rod ensures that the force can be transmitted to the load-bearing end smoothly and accurately, thereby improving the accuracy of the measurement.

[0017] 4. This solution sets two elastic parts with different measuring ranges, so that the device can accurately measure within different weight ranges. Before and after the carbon nanotube conductive paste is dried, due to the significant change in weight, using elastic parts with different measuring ranges for measurement can significantly improve the accuracy of the measurement.

[0018] 5. In this solution, a fan blade structure is provided on the outer side of the rotating seat. The fan blade structure can form an upward airflow as the rotating seat rotates, which helps to discharge the evaporated solvent faster and further improve the detection rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional structural diagram of the overall structure of the present invention.

[0020] Figure 2It is a cross-sectional structural diagram of the sample injection mechanism of the present invention.

[0021] Figure 3 It is the external structure diagram of the sample injection mechanism of the present invention.

[0022] Figure 4 It is a top view of the cross-sectional structure of the sample injection mechanism of the present invention.

[0023] Figure 5 It is a structural diagram of the lever mechanism of the present invention.

[0024] Figure 6 It is a cross-sectional structural diagram of the pressure sensing device of the present invention.

[0025] Figure 7 This is an external structural diagram of the pressure sensing device of the present invention.

[0026] Figure 8 It is the structural diagram of the force transmission plate of the present invention.

[0027] In the figure: 1 test workbench, 2 rotating seat, 3 filter hole, 4 filter membrane, 5 driving rod, 6 driving motor, 7 outer shell, 8 material guide part, 9 feeding pipe, 10 gaseous solvent outlet, 11 liquid solvent outlet, 12 support, 13 lever, 14 action end, 15 action block, 16 bearing end, 17 inner cover, 18 outer cover, 19 guide rod, 20 guide plate, 21 connecting rod, 22 fixing plate, 23 first range elastic member, 24 second range elastic member, 25 first connecting block, 26 second connecting block, 27 first action plate, 28 third connecting block, 29 force transmission plate, 30 force transmission member, 31 L-shaped plate, 32 second action plate, 33 pressing block, 34 upper plate, 35 lower plate, 36 elliptical space structure, 37 rubber tube, 38 rubber pinball, 39 fan blade structure, 40 first space part, 41 second space part, 42 heating resistor, 43 transmission belt. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Embodiment 1, as Figure 1-2As shown, a carbon nanotube conductive slurry solid content test device includes a test bench 1, a sample feeding mechanism, a heating mechanism, a centrifugal rotating mechanism and a weighing mechanism. The sample feeding mechanism is arranged on the upper left side of the test bench 1, and the sample feeding mechanism is used to load the carbon nanotube conductive slurry test sample. A heating mechanism is arranged on the inner side of the bottom of the sample feeding mechanism, and the heating mechanism is used to heat and evaporate the carbon nanotube conductive slurry test sample in the sample feeding mechanism. The centrifugal rotating mechanism includes a rotating seat 2 arranged inside the sample feeding mechanism, and the upper part of the rotating seat 2 is an open structure. The sample feeding mechanism includes an outer shell 7, and a material guide portion 8 is arranged above the outer shell 7. The lower part of the material guide portion 8 extends to the inner side of the rotating seat 2. A feed pipe 9 is arranged above the middle of the material guide portion 8. After the carbon nanotube conductive slurry enters from the feed pipe 9, it enters the rotating seat 2 after passing through the material guide portion 8. The material guide portion 8 can ensure that the carbon nanotube conductive slurry enters the rotating seat 2 without changing its trajectory and splashing out from the air. A filter hole 3 is arranged on the side of the rotating seat 2, and a filter membrane 4 is arranged in the filter hole 3. The filter membrane 4 is a filter membrane that has a good interception effect on the solid part in the conductive slurry and only allows the solvent to pass through. The size of the filter aperture of the filter membrane 4 can be set according to different types of carbon nanotube conductive slurries. The carbon nanotube conductive slurry is a multiphase mixture composed of carbon nanotubes as the main solid component and as a conductive medium and a certain liquid. According to the type of liquid, the carbon nanotube conductive slurry can be divided into oily slurry and aqueous slurry. The oily slurry is a medium with an organic solvent, such as NMP (N-methylpyrrolidone) and a trace of water. The molecular size of NMP is 0.8nm, the size range of water molecules is 0.4nm, and the diameter of carbon nanotubes is 2nm. Therefore, the filter aperture of the filter membrane 4 can be selected between 1nm-2nm, so that the filter membrane 4 can only filter out the solvent part. In this embodiment, the aqueous slurry can also be dried. The aqueous slurry is a mixture of carbon nanotubes and water. The diameter of the water molecule is usually 0.4nm. Therefore, for the aqueous slurry, the filter aperture of the filter membrane 4 can be selected between 0.4nm-2nm. The molecular sizes of the solid part and the solvent part of the above-mentioned conductive paste are calculated based on the conductive paste used in this embodiment. Due to the different preparation methods of the conductive paste, the molecular sizes of the solid part and the solvent part will be different. Therefore, the selection of the filtration pore size of the filter membrane 4 can be based on the corresponding measurement results.

[0030] A driving rod 5 is connected to the bottom of the rotating seat 2, and the driving rod 5 extends downward to the bottom of the sample injection mechanism. A driving motor 6 is provided on the side of the sample injection mechanism, and the driving motor 6 drives the driving rod 5 to rotate. A first space portion 40 and a second space portion 41 are provided at the bottom of the test workbench 1. The heating mechanism is a heating resistor 42, and the heating resistor 42 is arranged in the first space portion 40. The bottom of the driving rod 5 and the output end of the driving motor 6 both extend to the second space portion 41. A transmission belt 43 is connected between the bottom of the driving rod 5 and the output end of the driving motor 6. After the driving rod 5 rotates, it will drive the rotating seat 2 to rotate, and part of the solvent in the carbon nanotube conductive slurry sample can be separated from the rotating seat and splashed into the inner side of the outer shell 7, thereby dispersing the solvent in the carbon nanotube conductive slurry sample.

[0031] Combination Figure 3-4 , a gaseous solvent outlet 10 is provided on the top side of the outer shell 7. When the heating mechanism heats the inside of the sample introduction mechanism, since the solvent in the carbon nanotube conductive paste is no longer concentrated, the solvent part inside it can evaporate into gas faster after heating and go out from the gaseous solvent outlet 10. Preferably, a liquid solvent outlet 11 is provided on the bottom side of the outer shell 7, and part of the solvent separated from the carbon nanotube conductive paste can be discharged from the liquid solvent outlet 11. The cross-section of the rotating seat 2 is preferably an isosceles trapezoidal structure, and the design of the trapezoidal structure improves the stability of the slurry during the centrifugation process. Due to the gradual inclination of the trapezoidal wall, the slurry is not easy to splash when rotating, so it is discharged along with the liquid solvent outlet 11, which improves the accuracy of the solid content measurement of the conductive paste. A fan blade structure 39 is provided on the outside of the rotating seat 2. The fan blade structure 39 can form an upward airflow as the rotating seat 2 rotates, which helps to discharge the evaporated solvent faster.

[0032] Combination Figure 1 , a weighing mechanism is provided below the sample feeding mechanism, and the weighing mechanism is used to measure the weight data of the carbon nanotube conductive paste test sample. The weighing mechanism is firstly set to zero. When the carbon nanotube conductive paste enters the feeding mechanism, the overall weight of the carbon nanotube conductive paste is measured by the weighing mechanism, and the solvent in the carbon nanotube conductive paste is thrown out by the rotating seat 2. After heating for 40 minutes by the heating mechanism, the data of the weighing sensor is read again to obtain the weight of the dried carbon nanotube conductive paste. The weight of the solvent in the carbon nanotube conductive paste is obtained by subtracting the weight of the dried carbon nanotube conductive paste from the overall weight of the original carbon nanotube conductive paste. The solid content of the carbon nanotube conductive paste can be calculated by the above data. The device combines a heating mechanism and a centrifugal rotating mechanism, and can simultaneously remove the solvent in the carbon nanotube conductive paste by using the principles of heating evaporation and centrifugal separation. This dual action mechanism significantly improves the efficiency of solvent removal and shortens the solid content test cycle of the carbon nanotube conductive paste. Compared with traditional methods, the device can complete the test in a shorter time.

[0033] Embodiment 2, combined Figure 1 and Figure 5 This embodiment further improves the weighing mechanism. The weighing mechanism includes a lever device and a pressure sensing device arranged inside the test workbench 1. The lever device includes a support 12 and a lever 13. The upper part of the support 12 is a fulcrum and the support 12 supports the lever 13 through the upper fulcrum. One end of the lever 13 is an action end 14, and the action end 14 is hinged with an action block 15. The other end of the lever 13 is a bearing end 16. The bottom of the bearing end 16 is connected to the bottom of the injection mechanism. The length of the lever arm from the fulcrum to the action end 14 on the lever 13 is less than the length of the lever arm from the fulcrum to the bearing end 16 on the lever 13. The pressure sensing device is fixed to the end inside the test workbench 1, and the action end 14 applies pressure upward to the pressure sensing device. Through the design of the lever device, accurate measurement of the weight change of the injection mechanism is achieved. Since the length of the lever arm from the fulcrum to the action end 14 on the lever 13 is shorter than the length of the lever arm from the fulcrum to the bearing end 16, according to the lever principle, a small pressure change on the action end 14 can generate a large displacement or force on the bearing end 16, thereby improving the sensitivity and accuracy of the measurement. This design helps to more accurately measure the weight change of the carbon nanotube conductive slurry during heating and centrifugation, and then calculate its solid content.

[0034] A guide device is provided between the load-bearing end 16 and the sample introduction mechanism, and the guide device includes an inner cover body 17 fixed on the test workbench 1 and an outer cover body 18 slidably sleeved on the outer side of the inner cover body 17, the top of the outer cover body 18 is connected to the bottom of the sample introduction mechanism, and a guide rod 19 is provided at the middle bottom of the outer cover body 18, and the guide rod 19 passes through the inner cover body 17 downward and extends to the inner side of the test workbench 1 and is connected to a guide plate 20, and a connecting rod 21 is hinged on the guide plate 20, and the other end of the connecting rod 21 is hinged to the load-bearing end 16. The guide device provides a stable moving track for the sample introduction mechanism through the inner cover body 17 fixed on the test workbench 1 and the outer cover body 18 slidably sleeved on the outer side thereof. This design ensures that the sample introduction mechanism will not deviate or shake during movement, thereby improving the stability of the measurement. The design of the guide device optimizes the transmission path of force from the sample introduction mechanism to the load-bearing end 16. The precise matching of the guide rod 19, the guide plate 20 and the connecting rod 21 ensures that the force can be smoothly and accurately transmitted to the load-bearing end 16, thereby improving the accuracy of the measurement. At the same time, this design also reduces the energy loss and error accumulation caused by the complex force transmission path.

[0035] Embodiment 3, combined Figure 6-7, this embodiment is a further improvement of the pressure sensing device, the pressure sensing device includes a fixed plate 22, a first range elastic member 23 and a second range elastic member 24, the fixed plate 22 is fixed on the inner side wall of the sample injection mechanism, a first connecting block 25 is provided at the bottom of the fixed plate 22, the bottom of the first connecting block is connected to the right end of the first range elastic member 23, the bottom of the left end of the first range elastic member 23 is connected to the top of the right end of the second range elastic member 24, a second connecting block 26 is provided at the bottom of the right end of the second range elastic member 24, a first action plate 27 is connected to the bottom of the second connecting block 26, a third connecting block 28 is connected to the top of the left end of the second range elastic member 24, a force transmission plate 29 is connected to the third connecting block 28, a force transmission member 30 is provided at the bottom of the other end of the force transmission plate, the bottom of the force transmission member 30 passes through the first action plate 27 and is connected to an L-shaped plate 31, the bottom of the L-shaped plate 31 is connected to the second action plate 32, and a pressing block 33 is provided on both sides of the second action plate 32 opposite to the first action plate 27. In this embodiment, two measuring range elastic members are provided, wherein the first measuring range elastic member 23 has a large measuring range and is used to weigh the sample feeding mechanism filled with carbon nanotube conductive paste. At this time, since the carbon nanotube conductive paste contains a large amount of solvent, its weight is heavy. The second measuring range elastic member 24 has a small measuring range. After the carbon nanotube conductive paste is dried, the overall weight of the sample feeding mechanism will be greatly reduced. At this time, the second measuring range elastic member 24 with a small measuring range is used for weighing, and the weight of the carbon nanotube conductive paste after drying can be accurately measured.

[0036] When the injection mechanism is filled with carbon nanotube conductive slurry, under the action of the action end 14 of the lever 13, the second action plate 32 moves upward, and the pressure blocks 33 on both sides of the second action plate 32 will press on the first action plate 27. The first action plate 27 applies the force to the right end of the second range elastic member 24 through the second connecting block 26, and then transmits it to the left end of the first range elastic member 23. When the second action plate 32 moves upward, part of the force will also act on the left end of the second range elastic member 24 through the L-shaped plate 31, the force transmission member 30 and the force transmission plate 29, and then be transmitted to the first range elastic member 23 through the second range elastic member 24. After the two parts of force are gathered to the first range elastic member 23, the overall weight is measured by the first range elastic member 23. After the carbon nanotube conductive paste is dried, the overall weight is reduced. At this time, the height of the second action plate 32 is not as high as before, and the pressing blocks 33 on both sides of the second action plate 32 no longer act on the first action plate 27. At this time, the force of the overall weight of the injection mechanism is only applied to the left end of the second range elastic member 24 through the L-shaped plate 31, the force transmission member 30 and the force transmission plate 29. The overall weight of the injection mechanism is measured only by the second range elastic member 24. Since the second range elastic member 24 has a small range, it can be measured more accurately. By setting two elastic members with different ranges, the device can perform accurate measurements within different weight ranges. Before and after the carbon nanotube conductive paste is dried, due to the significant change in weight, using elastic members of different ranges for measurement can significantly improve the accuracy of the measurement. In particular, for the lighter weight after drying, using the second range elastic member 24 with a small range can avoid the nonlinear error of the large range elastic member under light load, thereby improving the measurement accuracy. The device can adaptively adjust the measurement method according to the weight change of the carbon nanotube conductive paste. Before the slurry is dried, due to its heavy weight, the elastic members of the two ranges participate in the measurement together; after drying, the weight is reduced, and the measurement is mainly performed by the second range elastic member 24 with a small range. This design allows the device to maintain a high measurement accuracy under different weights.

[0037] Combination Figure 8The force transmission plate 29 includes an upper plate 34 and a lower plate 35, and an elliptical space structure 36 is formed in the middle of the upper plate 34 and the lower plate 35. The elliptical space structure 36 has higher structural strength. The lengths of the major axis and the minor axis of the ellipse are different, so that the structure can better disperse and resist stress when subjected to external force, thereby improving the stability and durability of the overall structure and having a certain anti-deformation ability. When subjected to external pressure or impact, the elliptical structure can better maintain its shape stability and reduce the risk of deformation and damage, which helps the force transmission plate 29 to transfer load more effectively, and can reduce energy loss when transferring loads, thereby improving the force transmission efficiency. When subjected to external force, stress can be more evenly distributed in various parts of the ellipse, reducing the occurrence of stress concentration, thereby extending the service life of the force transmission plate 29. A rubber tube 37 is provided in the elliptical space structure 36, and a rubber ball 38 is provided inside the rubber tube 37. The rubber tube 37 and the rubber ball 38 inside it have good elasticity and buffering properties. When the force transmission plate 29 is subjected to external impact or vibration, the rubber tube 37 and the rubber ball 38 can absorb and disperse the energy, reduce the impact of vibration and impact on the force transmission plate 29 and the entire system, improve the stability and reliability of the system, and further improve the accuracy of weighing.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon nanotube conductive slurry solid content testing device, characterized in that: The invention comprises a test workbench (1), a sample feeding mechanism, a heating mechanism, a centrifugal rotating mechanism and a weighing mechanism. The sample feeding mechanism is arranged on the test workbench (1). The sample feeding mechanism is used to load a carbon nanotube conductive paste test sample. A heating mechanism is arranged on the inner side of the bottom of the sample feeding mechanism. The heating mechanism is used to heat and evaporate the carbon nanotube conductive paste test sample in the sample feeding mechanism. A weighing mechanism is arranged below the sample feeding mechanism. The weighing mechanism is used to measure the weight data of the carbon nanotube conductive paste test sample. The centrifugal rotating mechanism is arranged inside the sample feeding mechanism. The centrifugal rotating mechanism comprises a rotating seat (2). The top of the rotating seat (2) is an open structure. The side of the rotating seat (2) is provided with a filter hole (3). The filter hole (3) is provided with a filter membrane (4). The bottom of the rotating seat (2) is connected to a driving rod (5). The driving rod (5) extends downward to the bottom of the sample feeding mechanism. The side of the sample feeding mechanism is provided with a driving motor (6). The driving motor (6) drives the driving rod (5) to rotate.

2. The carbon nanotube conductive paste solid content testing device according to claim 1, characterized in that: The sample introduction mechanism comprises an outer shell (7), a material guide portion (8) is provided above the outer shell (7), the lower portion of the material guide portion (8) extends to the inner side of the rotating seat (2), a material feed pipe (9) is provided above the middle of the material guide portion (8), a gaseous solvent outlet (10) is provided on the top side of the outer shell (7), and a liquid solvent outlet (11) is provided on the bottom side of the outer shell (7).

3. The carbon nanotube conductive paste solid content testing device according to claim 2, characterized in that: The weighing mechanism comprises a lever device and a pressure sensing device arranged on the inner side of a test workbench (1), the lever device comprising a support (12) and a lever (13), the upper side of the support (12) being a fulcrum and the support (12) supporting the lever (13) via the upper fulcrum, one end of the lever (13) being an action end (14), the action end (14) being hinged with an action block (15), the other end of the lever (13) being a bearing end (16), the bottom of the bearing end (16) being connected to the bottom of a sample injection mechanism, the length of a force arm from the fulcrum to the action end (14) on the lever (13) being shorter than the length of a force arm from the fulcrum to the bearing end (16) on the lever (13), the pressure sensing device being fixed to the end inside the test workbench (1), the action end (14) applying pressure upwards to the pressure sensing device.

4. The carbon nanotube conductive paste solid content testing device according to claim 3, characterized in that: A guide device is provided between the bearing end (16) and the sample introduction mechanism, the guide device comprising an inner cover body (17) fixed on the test workbench (1) and an outer cover body (18) slidably mounted on the outer side of the inner cover body (17), the top of the outer cover body (18) is connected to the bottom of the sample introduction mechanism, a guide rod (19) is provided at the middle bottom of the outer cover body (18), the guide rod (19) passes downward through the inner cover body (17) and extends to the inner side of the test workbench (1) and is connected to a guide plate (20), a connecting rod (21) is hinged on the guide plate (20), and the other end of the connecting rod (21) is hinged to the bearing end (16).

5. The carbon nanotube conductive paste solid content testing device according to claim 4, characterized in that: The pressure sensing device comprises a fixing plate (22), a first range elastic member (23) and a second range elastic member (24); the fixing plate (22) is fixed to the inner side wall of the sample injection mechanism; a first connecting block (25) is provided at the bottom of the fixing plate (22); the bottom of the first connecting block (25) is connected to the right end of the first range elastic member (23); the bottom of the left end of the first range elastic member (23) is connected to the top of the right end of the second range elastic member (24); a second connecting block (26) is provided at the bottom of the right end of the second range elastic member (24); The bottom of the block (26) is connected to a first action plate (27), the top of the left end of the second range elastic member (24) is connected to a third connection block (28), the third connection block (28) is connected to a force transmission plate (29), the bottom of the other end of the force transmission plate (29) is provided with a force transmission member (30), the bottom of the force transmission member (30) passes through the first action plate (27) and is connected to an L-shaped plate (31), the bottom of the L-shaped plate (31) is connected to a second action plate (32), and the second action plate (32) is provided with a pressure block (33) on both sides of the second action plate (32) facing the first action plate (27).

6. The carbon nanotube conductive paste solid content testing device according to claim 5, characterized in that: The force transmission plate (29) comprises an upper plate (34) and a lower plate (35), and an elliptical space structure (36) is formed between the upper plate (34) and the lower plate (35).

7. The carbon nanotube conductive paste solid content testing device according to claim 6, characterized in that: A rubber tube (37) is provided inside the elliptical space structure (36), and a rubber ball (38) is provided inside the rubber tube (37).

8. The carbon nanotube conductive paste solid content testing device according to claim 7, characterized in that: A fan blade structure (39) is provided on the outer side of the rotating seat (2), and the fan blade structure (39) can form an ascending airflow as the rotating seat (2) rotates.

9. The carbon nanotube conductive paste solid content testing device according to claim 8, characterized in that: The cross section of the rotating seat (2) is an isosceles trapezoidal structure.

10. The carbon nanotube conductive paste solid content testing device according to claim 9, characterized in that: The bottom of the test workbench (1) is provided with a first space portion (40) and a second space portion (41); the heating mechanism is a heating resistor (42); the heating resistor (42) is arranged in the first space portion (40); the bottom of the drive rod (5) and the output end of the drive motor (6) both extend to the second space portion (41); and a transmission belt (43) is connected between the bottom of the drive rod (5) and the output end of the drive motor (6).

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