Detection device for evaluating fluidity of slurry

Abstract

The utility model discloses a detection device for evaluating fluidity of slurry. The detection device comprises a support frame, a sieving device body, a stirring mechanism and a slurry container, a hopper container body with the adjustable height is arranged on the supporting frame, a discharging opening in the bottom of the hopper container body is provided with a discharging speed adjusting mechanism, the screening device body is located between the hopper container body and the slurry container, the stirring mechanism comprises a stirring arm, and at least part of the stirring arm is located in the hopper container body. According to the utility model, the influence of slurry standing for different time in the sampling process on the fluidity of the slurry can be reduced, and meanwhile, the influence of operation difference on the test result is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of slurry testing devices, and in particular to a testing device for evaluating the flowability of slurry. Background Technology

[0002] In the lithium-ion battery cell manufacturing process, the positive and negative electrode slurry homogenization process is an essential step. This process involves adding powder and liquid in a specific order and ratio to prepare a slurry with certain flow characteristics. The quality of the slurry directly determines the cell yield and electrical performance. Therefore, evaluating the characteristics of the slurry becomes the primary task in battery cell manufacturing.

[0003] Currently, the industry mostly adopts the following methods:

[0004] 1. Visual orientation evaluation method: A screen with a certain mesh size is fixed to the discharge port of the mixer with a strip and the material is dropped under natural gravity. The size and speed of the slurry flow are observed. However, the liquid level in the mixing tank and the size of the screen's material passage area both affect the slurry discharge speed, resulting in a large error.

[0005] 2. Quantitative measurement method: A certain weight of slurry is taken and poured into a specific sieve. The time taken to complete the sieving is recorded to measure the fluidity of the slurry. This method is a great improvement over the directional evaluation method. However, the height and speed at which the slurry is poured into the sieve each time, as well as the length of time the slurry is left to stand in the beaker, all affect the test results and lead to evaluation bias.

[0006] Therefore, there is a need to provide a testing device for evaluating the fluidity of slurry to solve the above problems. Utility Model Content

[0007] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a testing device for evaluating the fluidity of slurry, which can reduce the influence of different slurry standing time on its fluidity during the sampling process, and at the same time reduce the influence of operational differences on the test results.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a testing device for evaluating the flowability of slurry, comprising a support frame, a sieve body, a stirring mechanism, and a slurry container; a height-adjustable funnel container body is provided on the support frame, and a discharge speed adjustment mechanism is provided at the discharge port at the bottom of the funnel container body; the sieve body is located between the funnel container body and the slurry container; the stirring mechanism includes a stirring arm, at least part of which is located inside the funnel container body. The stirring arm on the stirring rod is placed inside the funnel container body, and the slurry in the funnel container body is stirred by a motor to keep it in a flowing state, thereby reducing the influence of different standing times on the flowability of the slurry during sampling.

[0009] Furthermore, it also includes a horizontally positioned funnel container support plate, which is detachably connected to the support frame and can move up and down along the support frame. The funnel container body is located on the funnel container support plate. The funnel container support plate is used to support and place the funnel container body. By adjusting the height of the funnel container support plate relative to the support frame, the position of the funnel container body in the height direction is adjusted, ensuring that it maintains a fixed height after the test begins, thus preventing the slurry inside from affecting the flowability test results due to inconsistent drop height.

[0010] Furthermore, the funnel container support plate has a funnel container placement slot for vertically inserting the funnel container body. That is, the funnel container body and the funnel container support plate are detachably connected, making it convenient for the user to remove the funnel container body for cleaning after the slurry flowability test is completed. Its installation and cleaning are simpler, effectively improving the user's work efficiency.

[0011] It should be noted that in some embodiments, the funnel container placement slot can be circular, square, or triangular, and its specific shape is not limited, as long as it can accommodate the funnel container body and the funnel container body will not fall out of the placement slot.

[0012] Furthermore, the funnel container placement slot is circular, and the diameter of the funnel container placement slot is smaller than the outer diameter of the top opening of the funnel container body. This ensures that the funnel container body will not fall out of the funnel container placement slot after being placed inside.

[0013] In some embodiments, the diameter of the funnel container placement groove is the same as the outer diameter of the middle part of the funnel container body. After the funnel container body is placed in the funnel container placement groove, its middle part can be stuck by the groove opening, thereby ensuring that the funnel container body will never separate from the funnel container placement groove during the slurry flowability detection process, thus ensuring the detection efficiency of slurry flowability.

[0014] Furthermore, the funnel container support plate also includes connecting blocks located at both ends along its length, each connecting block having at least one threaded hole. The support frame includes two vertically opposite columns, each column having a strip-shaped through hole along its height direction corresponding to the position of the threaded hole. Screws pass through the threaded holes and the strip-shaped through holes, and tightening them fixes the funnel container support plate to the support frame. Tightening the screws in the opposite direction separates the two. By adjusting the position of the funnel container support plate upwards or downwards along the strip-shaped through holes in the height direction, the position of the funnel container body in the height direction can be changed.

[0015] The threaded connection makes it easy to disassemble the funnel container support plate and adjust its height on the support frame at any time to meet the requirements for testing the slurry flowability at different heights.

[0016] Furthermore, the funnel container support plate has a structure that is narrow at both ends and wide in the middle, with the funnel container placement slot located in the middle. The narrow-at-both-ends structure ensures the supporting force of the funnel container support plate while also reducing the manufacturing cost.

[0017] Furthermore, the material discharge speed control mechanism is a control valve. By setting the control valve to control the discharge speed of the slurry when it is introduced from the funnel container body into the screening body, the result of subsequent multiple flowability test verifications is avoided due to the variable of discharge speed affecting the flowability test results during the slurry flowability test process.

[0018] Furthermore, the stirring mechanism also includes a stirring drive unit vertically mounted on a support frame. The driving end of the stirring drive unit is connected to a stirring rod. One end of the stirring arm is connected to the stirring rod via a fixed bushing, and the other end is fixed to a support base at the bottom of the stirring rod. After sampling, the slurry is introduced into the funnel container body. The stirring drive unit stirs the slurry at a specific rotation speed, ensuring the slurry remains in a flowing state, thereby guaranteeing its fluidity and reducing the impact on its fluidity caused by static storage.

[0019] Furthermore, the system also includes a sieve support 9 and an electronic scale. The sieve support 9 has a slot for accommodating the sieve body, and the slurry container is placed on the electronic scale. The electronic scale is integrated with an external slurry flowability testing system. A target value for the slurry weight is set, and the weight is displayed in real time after the slurry falls into the slurry container. The machine stops timing after the target value is reached. By measuring the time taken to sieve a specific weight of slurry, the flowability of the slurry can be quantitatively evaluated, reducing the interference of different slurry sample weights on the test results.

[0020] Furthermore, it also includes a fixed base, on which the support frame, the sieve support, and the electronic scale are all mounted.

[0021] The beneficial effects of this utility model are:

[0022] 1. In this utility model, the stirring mechanism and the funnel container body cooperate with each other. The stirring arm on the stirring rod is placed in the funnel container body. The slurry in the funnel container body is stirred by the motor to make it flow, thereby reducing the influence of different standing times on the fluidity of the slurry during the sampling process.

[0023] 2. In this utility model, a control valve is installed at the discharge port at the bottom of the funnel container body, which can adjust the opening of the control valve in real time, and the height of the funnel container body can be adjusted at any time to ensure that each flowability test is under the same conditions, thereby reducing the impact of operational differences on subsequent test results.

[0024] 3. In this utility model, an electronic scale is placed at the bottom of the slurry container, which can integrate and display the specific weight of the slurry in the slurry container in real time, and end the test according to the specific weight target value, accurately obtaining the weight of the slurry flowing through the sieve per unit time, which can reduce the interference of different slurry sampling weights on the test results. Attached Figure Description

[0025] Figure 1 This is an axonometric view of the overall structure of an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the funnel container support plate structure according to an embodiment of the present invention;

[0027] Figure 3 This is an isometric view of the overall structure of the stirring mechanism according to an embodiment of the present invention;

[0028] In the diagram: 1. Fixed base; 2. Support frame; 3. Funnel container body; 4. Funnel container support plate; 41. Funnel container placement slot; 42. Connecting block; 43. Threaded hole; 5. Strip-shaped through hole; 6. Stirring mechanism; 61. Stirring motor; 62. Stirring rod; 63. Stirring arm; 64. Fixed bushing; 65. Support base; 7. Discharge port; 8. Control valve; 9. Sieve support; 10. Sieve body; 11. Slurry container; 12. Electronic scale. Detailed Implementation

[0029] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of this utility model. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" are generally based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the protection scope of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0030] Existing slurry flowability testing devices that use visual orientation evaluation methods suffer from inconsistent heights in the mixing tanks used for storing and stirring the slurry. This leads to significant errors during repeated verification tests. Therefore, this invention proposes a new slurry flowability testing device (see attached diagram). Figure 1-3The system includes a fixed base 1, a support frame 2 connected to the fixed base 1, a sieve body 10, a funnel container body 3 located above the sieve body 10, a stirring mechanism 6, and a slurry container 11 located below the sieve body 10. A sieve support 9 and an electronic scale 12 are also mounted on the fixed base 1. The sieve support 9 has a slot for accommodating the sieve body 10. The electronic scale 12 is located below the slurry container 11, supporting the slurry container 11 while also monitoring the weight of the slurry in the slurry container 11 in real time. The electronic scale 12 is integrated with an external slurry flowability testing system. A target weight of the slurry is set, and the weight is displayed in real time after the slurry falls into the slurry container 11. The machine stops timing after reaching the set target weight. By measuring the time taken to sieve a specific weight of slurry, the system can quantitatively evaluate the quality of the slurry flowability, reducing interference from varying slurry sample weights in each test.

[0031] The height of the funnel container body 3 on the support frame 2 is adjustable. On the one hand, it is suitable for testing the fluidity of slurry at different heights, which can effectively improve the practicality of the testing device. On the other hand, after the first test of the fluidity of the slurry, the height of the funnel container body 3 is fixed and will not be adjusted. This can effectively avoid the impact on the subsequent screening time when the slurry is introduced into the screening body 10 due to the change in the height of the funnel container body 3 during multiple verification tests.

[0032] In some embodiments, the height adjustment of the funnel container body 3 is achieved by setting a horizontal funnel container support plate 4, which is detachably connected to the support frame 2 and can move up and down along the support frame 2. Connecting blocks 42 are provided at both ends of the funnel container support plate 4 along its length, each connecting block 42 having at least one threaded hole 43. The support frame 2 includes two vertically opposite columns, each column having a strip-shaped through hole 5 along its height direction corresponding to the position of the threaded hole 43. Screws pass through the threaded holes 43 and the strip-shaped through holes 5, and tightening them fixes the funnel container support plate 4 to the support frame 2. Tightening the screws in the opposite direction separates the two. By adjusting the position of the funnel container support plate 4 along the strip-shaped through holes 5 up or down in the height direction, the position of the funnel container body 3 in the height direction can be changed. This threaded connection makes the funnel container support plate 4 easy to disassemble and allows its height on the support frame 2 to be adjusted at any time to meet the requirements for testing the fluidity of the slurry at different heights.

[0033] It should be noted that the column is not limited to having only strip-shaped through holes 5. It can also be several rows of insertion holes that match the size of the threaded holes 43 along the height of the column. It can also be used to insert screws and fix the funnel container support plate 4 at different heights on the support frame 2.

[0034] The discharge port 7 at the bottom of the funnel container body 3 is equipped with a discharge speed adjustment mechanism, which can accurately control the discharge speed of the slurry into the sieve body 10 and ensure that the opening of the discharge is consistent each time. Therefore, the slurry discharge speed into the sieve body 10 will not affect the sieving time, effectively eliminating the interference of this factor on the subsequent test results.

[0035] Specifically, in some embodiments, the material discharge speed control mechanism can be a control valve 8. By setting the control valve 8 to control the discharge speed of the slurry when it is introduced from the funnel container body 3 into the screening body 10, the discharge speed variable can be avoided from affecting the results of subsequent multiple flowability test verifications during the slurry flowability test.

[0036] In some embodiments, the control valve 8 is an electric control valve 8 or a manual control valve 8. When a manual control valve 8 is used, the operator can turn the switch of the manual control valve 8 to adjust its opening degree, thereby adjusting the slurry discharge speed.

[0037] A sieve body 10 is provided between the funnel container body 3 and the slurry container 11, and the slurry falling from the funnel container body 3 is sieved through the sieve body 10.

[0038] The stirring mechanism 6 includes a stirring arm 63, at least partially located inside the funnel container body 3. The stirring arm 63 can continuously stir the slurry inside the funnel container body 3 at a specific rotation speed. Compared with the prior art of testing the fluidity of slurry by allowing it to stand for a long time, this invention can ensure that the slurry inside the funnel container body 3 is always in a flowing state, thus ensuring the fluidity of the slurry and reducing the impact of standing on its fluidity.

[0039] In some embodiments, the centers of the funnel container body 3, the sieve body 10, and the slurry container 11 are aligned in a straight line. This ensures that the slurry falling from the funnel container body 3 to the sieve body 10 and then flowing through the sieve body 10 can accurately fall into the slurry container 11. This effectively prevents the slurry from not being fully received by the sieve body 10 or the slurry container 11 during its descent, reduces variables in the flowability detection process, and avoids affecting the test results.

[0040] In other embodiments, the two ends of the funnel container support plate 4 along its length are respectively connected to two sliding modules vertically arranged on the support frame 2. The two sliding modules can synchronously and automatically drive the funnel container support plate 4 to move up or down to adjust its position, so as to adjust the funnel container body 3 to the required position. The two ends of the funnel container support plate 4 along its length can also be connected to the sliding seat of the sliding module by screws, or inserted into the sliding seat of the sliding module, so as to realize the detachability of the funnel container support plate 4.

[0041] The funnel container body 3 is located on the funnel container support plate 4. The funnel container support plate 4 is used to support and place the funnel container body 3. By adjusting the height of the funnel container support plate 4 relative to the support frame 2, it is equivalent to adjusting the position of the funnel container body 3 in the height direction, so that it always maintains a fixed height after the test starts, and avoids the slurry inside from affecting the flowability test results due to inconsistent drop height.

[0042] The funnel container support plate 4 has a funnel container placement groove 41 for vertically placing the funnel container body 3. When performing slurry flowability testing, the funnel container body 3 can be placed directly on the funnel container support plate 4 from top to bottom. After the test is completed, it can be directly removed for cleaning. That is, the funnel container body 3 and the funnel container support plate 4 are detachably connected. This structure makes the installation and cleaning of the funnel container body 3 simpler and can effectively improve the user's work efficiency.

[0043] In some embodiments, two connecting ears are horizontally arranged on the outer periphery of the funnel container body 3, and the two connecting ears are symmetrically arranged along the center of the funnel container body 3. After the funnel container body 3 is placed on the funnel container support plate 4, the two connecting ears on it can be threadedly connected to the funnel container support plate 4 by screws. While being detachable, it also ensures that the funnel container body 3 is always placed in a stable state on the funnel container support plate 4, so as to avoid the funnel container body 3 tilting during the testing process and causing the slurry inside to leak out.

[0044] It should be noted that in some embodiments, the funnel container placement slot 41 can be circular, square or triangular, and its specific shape is not limited, as long as it can accommodate the funnel container body 3 and the funnel container body 3 will not fall out of the slot.

[0045] The funnel container placement groove 41 is circular, and the diameter of the funnel container placement groove 41 is smaller than the outer diameter of the top opening of the funnel container body 3. This ensures that the funnel container body 3 will not fall out of the funnel container placement groove 41 after being placed inside it.

[0046] In some embodiments, the diameter of the funnel container placement groove 41 is the same as the outer diameter of the middle part of the funnel container body 3. After the funnel container body 3 is placed in the funnel container placement groove 41, its middle part can be stuck by the groove opening, thereby ensuring that the funnel container body 3 will never separate from the funnel container placement groove 41 during the slurry flowability detection process, thus ensuring the detection efficiency of slurry flowability.

[0047] The funnel container support plate 4 has a structure that is narrow at both ends and wide in the middle, with the funnel container placement groove 41 located in the middle. The narrow-at-both-ends structure ensures the supporting force of the funnel container support plate 4 while also reducing the manufacturing cost.

[0048] The stirring mechanism 6 also includes a stirring drive unit vertically mounted on the support frame 2. The driving end of the stirring drive unit is connected to a stirring rod 62. One end of a stirring arm 63 is connected to the stirring rod 62 via a fixed bushing 64, and the other end is fixed to a support base 65 at the bottom of the stirring rod 62. After sampling, the slurry is introduced into the funnel container body 3. The stirring drive unit stirs the slurry at a specific rotation speed, ensuring the slurry remains in a flowing state, thereby guaranteeing its fluidity and reducing the impact of static storage on its fluidity.

[0049] In some embodiments, the stirring drive is a stirring motor 61, and the stirring arm 63 is an inverted right-angled triangle structure, which is symmetrically arranged along the stirring rod 62. The stirring arm 63 can be completely placed inside the funnel container body 3, and its hypotenuse is left with a gap from the inner wall of the funnel container body 3 to avoid interference between the two when rotating and stirring. At the same time, a certain material drop space is also left between the lower surface of the support base 65 in the stirring mechanism 6 and the top of the discharge port 7 to avoid clogging the discharge port 7 and affecting the slurry drop.

[0050] A method for testing the fluidity of a slurry, comprising the aforementioned slurry fluidity testing device, includes the following steps:

[0051] S1: Take a certain amount of slurry from the homogenization system using a beaker or container and pour it into the funnel container body 3; before pouring the slurry into the funnel container body 3, adjust the position of the funnel container support plate 4 on the support frame 2 according to the set test height, fix it on the support frame 2 after reaching the set position, and place the funnel container body 3 in the funnel container placement slot 41.

[0052] S2: Start the stirring mechanism 6 and stir in the funnel container body 3 at the specified speed for a fixed time. After stirring is completed, open the control valve 8 and start timing. It should be noted that the fixed time can be 10 min, 15 min, or 20 min. When the installed control valve 8 is a manual valve, the fixed opening degree is 0-1 opening degree.

[0053] S3: The slurry falls from the funnel container body 3 into the sieve body 10, and flows into the slurry container 11 below it after passing through the sieve body 10.

[0054] S4: The electronic scale 12 displays the weight of the slurry container 11 in real time. The timing ends when the slurry reaches the predetermined weight m. The duration is recorded as t. The result of the slurry sieve flowability test is m / t.

[0055] Where m / t is the weight of slurry sieved per unit time. It should be noted that after the slurry container 11 is placed on the electronic scale 12, the electronic scale 12 will be zeroed to ensure the accuracy of the slurry flowability test data.

[0056] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A testing device for evaluating the fluidity of slurry, characterized in that: It includes a support frame, a sieve body, a stirring mechanism, and a slurry container; the support frame is provided with a height-adjustable funnel container body, the discharge port at the bottom of the funnel container body is provided with a discharge speed adjustment mechanism, the sieve body is located between the funnel container body and the slurry container, and the stirring mechanism includes a stirring arm, at least part of which is located inside the funnel container body.

2. The testing device for evaluating slurry flowability according to claim 1, characterized in that: It also includes a horizontally arranged funnel container support plate, which is detachably connected to the support frame and can move up and down along the support frame. The funnel container body is located on the funnel container support plate.

3. The testing device for evaluating slurry flowability according to claim 2, characterized in that: The funnel container support plate has a funnel container placement slot for vertically placing the funnel container body.

4. The testing device for evaluating slurry flowability according to claim 3, characterized in that: The funnel container placement slot is circular, and the diameter of the funnel container placement slot is smaller than the outer diameter of the top opening of the funnel container body.

5. The testing device for evaluating slurry flowability according to claim 3, characterized in that: The funnel container support plate also includes connecting blocks located at both ends of its length direction. Each connecting block has at least one threaded hole. The support frame includes two vertically opposite columns. Each column has a strip-shaped through hole along its height direction corresponding to the position of the threaded hole.

6. The testing device for evaluating slurry flowability according to claim 3, characterized in that: The funnel container support plate has a structure that is narrow at both ends and wide in the middle, and the funnel container placement slot is located in the middle position.

7. The testing device for evaluating slurry flowability according to claim 1, characterized in that: The material feeding speed control mechanism is a control valve.

8. The testing device for evaluating slurry flowability according to claim 1, characterized in that: The stirring mechanism also includes a stirring drive unit vertically mounted on a support frame. The driving end of the stirring drive unit is connected to a stirring rod. One end of the stirring arm is connected to the stirring rod through a fixed bushing, and the other end is fixed to a support base at the bottom of the stirring rod.

9. The testing device for evaluating slurry flowability according to claim 1, characterized in that: It also includes a sieve support and an electronic scale. The sieve support has a slot for accommodating the sieve body, and the slurry container is placed on the electronic scale.

10. The testing device for evaluating slurry flowability according to claim 1, characterized in that: It also includes a fixed base, on which the support frame, the sieve support and the electronic scale are all mounted.

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