Rapid testing device for solid content of battery slurry

Abstract

The utility model provides a rapid testing device for the solid content of battery slurry. The rapid testing device comprises a crucible, a lifting platform, a weighing platform, a heating assembly and a vacuumizing assembly, the lifting platform drives the crucible to ascend and descend in a bearing mode, the weighing platform is arranged below the crucible, in the jacking state, the lifting platform drives the crucible to leave the weighing platform, and in the falling state, the lifting platform is separated from the crucible, and the crucible falls on the weighing platform; the heating assembly is installed on the periphery of the crucible and used for heating the crucible. The vacuumizing assembly communicates with the interior of the crucible through a hose and is used for vacuumizing the interior of the crucible. The rapid testing device for the solid content of the battery slurry has the advantages of being accurate in weight measurement, controllable in heating temperature rise stability and capable of greatly improving the detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of battery slurries, and specifically, to a device for rapidly testing the solid content of battery slurries. Background Art

[0002] The solid content of battery slurries is closely related to their stability. Within a certain range, with the same process and formula, the higher the solid content of the slurry, the higher the viscosity and the higher the slurry stability. The solid content is an important index for evaluating the performance of the slurry, and its solid content needs to be tested before use to meet the requirements for use.

[0003] GB / T 17473.1-2008 stipulates the test method for precious metal slurries used in microelectronic technology - determination of solid content. For sintered slurries, the crucible filled with the test sample is placed in a box-type resistance furnace, heated to 150 °C, and kept warm for 30 min; then the furnace door is closed, and the temperature is continuously raised to 850 °C and kept warm for 30 min; after sintering, the power supply is turned off, and the crucible is taken out when the temperature drops to 80 °C - 100 °C, placed in a desiccator, and cooled to room temperature before weighing. In the enterprise standard Q / 320411 BLB 001-2016 "Silver paste CSP-M3D for the front electrode of crystalline silicon solar cells", DTA is used for solid content testing, with a heating rate of 20 °C / min and heating to 500 °C to end, and the whole process takes 25 min to complete.

[0004] The above two test standards take a long time, seriously delaying production efficiency, and at the same time, it will also cause inaccuracy of weighing data.

[0005] The test method provided by the patent application 201910971643.3 "A test method for the solid content of lithium battery slurries" includes the following steps: first, cut a square foil with scissors and wipe off the stains attached to the surface of the foil to make the surface of the foil clean, apply the slurry or colloid on the surface of the foil, and weigh it; then use a high-temperature hot air gun to dry the slurry or colloid on the foil and weigh it. This test method for the solid content of lithium battery slurries can quickly measure the solid content of the slurry or colloid in 2 - 3 min, greatly improving production efficiency compared with the previous oven baking or DTA testing, with a fast test speed and avoiding inaccurate test values caused by fluctuations of the balance scale.

[0006] However, this method has the defect that it is difficult to control the drying temperature during actual operation and cannot ensure the consistent stability of the measurement results.

[0007] In order to solve the above existing problems, people have been seeking an ideal technical solution. Content of the Utility Model

[0008] The object of the present utility model is to provide a rapid testing device for the solid content of battery slurry, which can quickly and accurately measure the solid content of battery slurry in view of the deficiencies of the prior art.

[0009] To achieve the above object, the technical solution adopted by the present utility model is: a rapid testing device for the solid content of battery slurry, comprising a crucible, a lifting platform, a weighing platform, a heating component and a vacuum pumping component;

[0010] The lifting platform drives the crucible to lift and lower in a supporting manner. The weighing platform is arranged below the crucible. In the lifting state, the lifting platform drives the crucible to leave the weighing platform. In the falling state, the lifting platform is separated from the crucible and the crucible falls on the weighing platform;

[0011] The heating component is arranged outside the crucible to heat the crucible;

[0012] The vacuum pumping component is connected to the inside of the crucible through a hose to pump vacuum into the inside of the crucible.

[0013] Based on the above, a temperature sensor is further arranged inside the crucible.

[0014] Based on the above, the crucible comprises a crucible body and a crucible cover. The end of the hose of the vacuum pumping component and the temperature sensor both enter the inside of the crucible from the crucible cover.

[0015] Based on the above, a supporting part extending around is arranged at the upper part of the crucible. The lifting platform realizes the lifting and falling of the crucible by lapping with the supporting part.

[0016] Based on the above, the lifting platform comprises a threaded rod, a spring, a load platform, a rotating nut, a connecting piece, a supporting platform and a supporting base. The bottom end of the threaded rod is fixedly connected with the supporting base. The lower threaded section of the threaded rod is in threaded cooperation with the rotating nut. A guiding hole corresponding to the threaded rod is arranged on the load platform. The load platform is sleeved on the threaded rod through the guiding hole and supported on the rotating nut. The upper end of the threaded rod is fixedly connected with the supporting platform through the connecting piece. The spring is sleeved on the threaded rod and is located between the connecting piece and the load platform. The weighing platform is arranged at the center of the load platform.

[0017] Based on the above, the crucible is placed on the weighing platform through a tray.

[0018] Based on the above, there is a gap between the perforation for passing through the crucible at the center of the supporting platform and the outer wall of the crucible.

[0019] Based on the above, the heating component is an induction heating device surrounding the outer wall of the crucible. The heating component is fixedly or separately arranged from the crucible, and the heating temperature ranges from 600°C to 1200°C.

[0020] Based on the above, the material of the crucible is high-purity graphite.

[0021] Based on the above, the end of the hose of the vacuum pumping assembly that contacts the crucible cover and enters the crucible is made of copper or ceramic.

[0022] The utility model has substantial features and progress compared to the prior art. Specifically, based on the characteristic that heating can quickly remove moisture from the slurry, the utility model uses a device composed of a crucible, a weighing platform, a heating component, a lifting component and a vacuum component. Through a series of operations, the weight of the crucible, the weight of the raw material + the weight of the crucible, and the weight of the solid slurry after heating and evaporating the moisture + the weight of the crucible are obtained respectively. The solid content of the slurry can be obtained by simple calculation, and the method is simple and efficient.

[0023] Furthermore, because of the induction heating method used in conjunction with the crucible to conduct heat, the metal powder contained in the slurry itself generates heat under the action of the magnetic field, and the heating efficiency is extremely high, which greatly shortens the entire detection cycle to 2-3 minutes, greatly improving the detection efficiency.

[0024] Furthermore, due to the excellent and stable heat transfer capacity of the crucible, the high degree of controllability of the induction heating method parameters, and the stable and efficient weighing method, the consistency of the measurement results is maintained at a high level.

[0025] Furthermore, the created vacuum sealed environment can avoid interference caused by air disturbance and improve the stability of measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a battery slurry solid content rapid testing device in the utility model.

[0027] In the figure: 1. Crucible; 2. Heating assembly; 3. Support platform; 4. Tray; 5. Weighing platform; 6. Spring; 7. Threaded rod; 8. Base; 9. Rotating nut; 10. Loading platform; 11. Connector; 12. Temperature sensor; 13. Crucible cover; 14. Hose; 15. Air inlet; 16. Vacuum pump system; 17. Air outlet. DETAILED DESCRIPTION

[0028] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0029] like Figure 1 As shown, a battery slurry solid content rapid testing device includes a crucible 1, a lifting platform, a weighing platform 5, a heating component 2 and a vacuum component.

[0030] The lifting platform drives the crucible 1 to lift in a supporting manner. The weighing platform 5 is arranged below the crucible 1. In the jacking state, the lifting platform drives the crucible 1 away from the weighing platform 5. In the falling state, the lifting platform is separated from the crucible 1 and the crucible 1 lands on the weighing platform 5. In this embodiment, the weighing platform 5 adopts a high-precision precision analytical balance.

[0031] In this embodiment, the lifting platform includes a threaded rod 7, a spring 6, a load platform 10, a rotating nut 9, a connecting member 11, a supporting platform 3 and a supporting base 8. The bottom end of the threaded rod 7 is fixed to the supporting base 8, and the fixing method can adopt threaded connection, riveting or welding. The lower threaded section of the threaded rod 7 is in threaded cooperation with the rotating nut 9. A guide hole corresponding to the threaded rod 7 is arranged on the load platform 10. The load platform 10 is sleeved on the threaded rod 7 through the guide hole and supported on the rotating nut 9. The upper end of the threaded rod 7 is fixedly connected to the supporting platform 3 through the connecting member 11. The connecting member 11 can adopt an I-shaped connecting member or other connecting members with connecting end faces at both ends. The spring 6 is sleeved on the threaded rod 7 and is located between the connecting member 11 and the load platform 10. The weighing platform 5 is arranged at the center of the load platform 10. By rotating the rotating nut 9 relative to the threaded rod 7, the height of the rotating nut 9 is changed, thereby realizing the height adjustment of the load platform 10. The spring is used for the return of the load platform 10 and the smoothness of the interaction process.

[0032] The upper part of the crucible 1 is provided with a supporting part extending around. The supporting platform 3 at the top of the lifting platform realizes the jacking and falling of the crucible 1 by lapping with the supporting part.

[0033] In other embodiments, the lifting platform can also adopt a lifting platform driven by an electric control telescopic rod, a pneumatic method, a linear motor, a linear slide table, etc.

[0034] The heating component 2 is installed on the outer periphery of the crucible 1 for heating the crucible. The heating component 2 selects an induction heating device in this embodiment. In other embodiments, it can also adopt direct heating methods such as heating wires and heating tubes to heat by thermal radiation.

[0035] The vacuum pumping component is connected to the inside of the crucible 1 through a hose 14 for pumping vacuum inside the crucible 1. Vacuum pumping can solve the problem of air flow disturbance. In this embodiment, the vacuum pumping component includes a vacuum pump system 16, an air inlet 15 and an air outlet 17.

[0036] Technical principle description:

[0037] First, weigh the crucible 1 body after cleaning and drying, then import the test slurry and weigh it for the second time. Then lift the crucible, heat it up to the set parameters, drain the moisture in the slurry, and lower the crucible onto the weighing platform to weigh it for the third time. Through simple calculations, the solid content of the slurry can be obtained.

[0038] In a preferred embodiment, a temperature sensor 12 is further provided in the crucible. In this embodiment, an infrared thermometer is used, and other forms of non-contact temperature sensors can also be selected to prevent the sensor from being damaged at high temperatures. The temperature measurement accuracy of the infrared thermometer is controlled within ±5°C.

[0039] In order to facilitate the installation of the temperature sensor 12 and the hose 14, in other embodiments, the crucible 1 includes a crucible body and a crucible cover 13. The end of the hose 14 of the vacuum pumping assembly and the temperature sensor 12 both enter the crucible interior from the crucible cover 13. To prevent the hose 14 from being damaged by high temperatures, the end material of the hose 14 can be designed as copper or ceramic.

[0040] In some embodiments, to prevent the high temperature of the crucible 1 from damaging the weighing platform 5, the crucible 1 is placed on the weighing platform 5 through a tray 4.

[0041] In some embodiments, to prevent the lifting platform from interfering with the weighing of the crucible, there is a gap between the perforation in the center of the supporting platform 3 for passing through the crucible 1 and the outer wall of the crucible 1. After descending, it does not contact the crucible to avoid inaccurate weighing data.

[0042] In a preferred embodiment, the heating component 2 and the crucible 1 are fixedly or separately arranged, and the heating temperature is between 600°C - 1200°C. When separately arranged, the weighing process of the crucible 1 is more stable and accurate. When fixedly arranged, the installation method of the heating component 2 needs to be considered to prevent the crucible 1 from tilting.

[0043] To ensure the thermal conductivity, in a preferred embodiment, the material of the crucible is high-purity graphite.

[0044] Description of the specific implementation process:

[0045] Step 1, place the crucible 1 that has been cleaned and dried to constant weight on the tray 4 of the precision balance. The precision analytical balance displays the weight of the crucible and records it as m1.

[0046] Step 2, put the slurry to be tested into the crucible 1. The precision analytical balance displays the sum of the weights of the crucible 1 and the slurry and records it as m2;

[0047] Step 3, adjust the rotating nut 9, and the lifting platform rises until the crucible 1 is separated from the tray 4 by a certain distance, and this distance is greater than 10 mm.

[0048] Step 4: Cover the crucible lid 13, and insert the test section of the infrared thermometer and the vacuum pump pipeline into the crucible lid 13;

[0049] Step 4: Turn on the vacuum pump system 16, evacuate the crucible 1, and control the pressure inside the crucible 1 to be below 100 Pa;

[0050] Step 5: Start the induction heating device to heat the crucible 1 and the slurry inside. When the measured temperature reaches the required temperature, stop heating;

[0051] Step 6: Turn off the vacuum system 16 and open the crucible lid.

[0052] Step 7: Adjust the rotating nut 9 to lower the lifting platform until the crucible 1 is in normal contact with the tray 4; the precision analytical balance displays the measured weight, which is recorded as m3.

[0053] Step 8: The solid content test result of the slurry is 1 - (m2 - m3) / (m2 - m1) * 100%.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific embodiments of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A rapid test device for the solid content of battery slurry, characterized in that: It includes a crucible, a lifting platform, a weighing platform, a heating component and a vacuum pumping component; The lifting platform drives the crucible to lift in a supporting manner. The weighing platform is arranged below the crucible. In the lifting state, the lifting platform drives the crucible away from the weighing platform. In the falling state, the lifting platform is separated from the crucible and the crucible falls on the weighing platform; The heating component is arranged outside the crucible to heat the crucible; The vacuum pumping component is connected to the inside of the crucible through a hose to pump vacuum inside the crucible.

2. The battery slurry solid content rapid testing device according to claim 1, characterized in that: A temperature sensor is also arranged inside the crucible.

3. The battery paste solid content rapid testing device according to claim 2, characterized in that: The crucible includes a crucible body and a crucible cover. The end of the hose of the vacuum pumping component and the temperature sensor both enter the inside of the crucible from the crucible cover.

4. The rapid test device for the solid content of battery slurry according to claim 3, characterized in that: A supporting part extending around is arranged at the upper part of the crucible. The lifting platform realizes the lifting and falling of the crucible by overlapping with the supporting part.

5. The device for rapidly testing the solid content of battery slurry according to any one of claims 1-4, characterized in that: The lifting platform includes a threaded rod, a spring, a loading platform, a rotating nut, a connecting piece, a supporting platform and a supporting base. The bottom end of the threaded rod is fixedly connected to the supporting base. The lower threaded section of the threaded rod is in threaded cooperation with the rotating nut. A guiding hole corresponding to the threaded rod is arranged on the loading platform. The loading platform is sleeved on the threaded rod through the guiding hole and supported on the rotating nut. The upper end of the threaded rod is fixedly connected to the supporting platform through the connecting piece. The spring is sleeved on the threaded rod and is located between the connecting piece and the loading platform. The weighing platform is arranged at the center of the loading platform.

6. The rapid testing device for the solid content of battery slurry according to claim 5, wherein: The crucible is placed on the weighing platform through a tray.

7. The battery slurry solid content rapid testing device according to claim 5, wherein: There is a gap between the perforation for passing through the crucible at the center of the supporting platform and the outer wall of the crucible.

8. The battery paste solid content rapid testing device according to claim 5, characterized in that: The heating component is an induction heating device surrounding the outer wall of the crucible. The heating component is fixedly or separately arranged from the crucible, and the heating temperature is between 600°C and 1200°C.

9. The battery slurry solid content rapid testing device according to claim 3, wherein: The material of the crucible is high-purity graphite.

10. The battery slurry solid content rapid testing device according to claim 3 or 4 or 6 or 7 or 8 or 9, characterized in that: The end of the hose of the vacuum pumping component in contact with the crucible cover and the part entering the inside of the crucible are made of copper or ceramic.

Images