A simple device for determining the particle size of lithium iron phosphate

Abstract

This utility model discloses a simple device for determining the particle size of lithium iron phosphate, including a weighing platform, a mixing container, and a mixing assembly. The mixing container is mounted on the weighing platform with a limiting position. A mounting plate is provided on the top of the mixing container, and a sample inlet is opened on one side of the mounting plate. The mixing assembly is located above the center of the mounting plate and includes a stirring shaft, stirring blades, and a stirring motor. The stirring motor is mounted above the mounting plate, and the stirring shaft is located inside the mixing container. The top of the stirring shaft is connected to the stirring motor. The stirring blades are evenly spaced on the stirring shaft. The mixing container is transparent. The advantages of this utility model are that it can quickly achieve the mixing of lithium iron phosphate powder and dispersant, and can quickly determine the particle size of lithium iron phosphate powder by sedimentation time. It has a simple structure and is easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of testing technology for battery cell raw materials, and in particular to a simple device for measuring the particle size of lithium iron phosphate. Background Technology

[0002] Lithium iron phosphate (LiFePO4) is used as a cathode material for lithium-ion batteries, and its particle size distribution has a significant impact on battery performance. Currently, the industry commonly uses laser particle size analyzers to determine particle size. However, this method requires precision equipment, is costly (approximately several hundred thousand yuan per unit), and is easily affected by environmental factors such as temperature, humidity, and particle agglomeration. Furthermore, the operation is complex, requires specialized personnel, and makes it difficult to quickly assess real-time quality during the production process.

[0003] The closest existing technology is the sedimentation method based on Stokes' law of settling, but it relies on complex formula calculations or supporting software analysis, and still suffers from strong equipment dependence and cumbersome operation. Existing sedimentation methods require the use of centrifuges to accelerate sedimentation, which increases equipment costs and operational difficulty. Utility Model Content

[0004] The purpose of this invention is to provide a simple device for measuring the particle size of lithium iron phosphate, which can quickly mix lithium iron phosphate powder and dispersant, and quickly determine the particle size of lithium iron phosphate powder by sedimentation time. It has a simple structure and is easy to operate.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A simple device for determining the particle size of lithium iron phosphate is characterized by comprising a weighing platform, a mixing container, and a mixing assembly. The mixing container is mounted on the weighing platform with a limiting position. A mounting plate is provided on the top of the mixing container, and a sample inlet is provided on one side of the mounting plate. The mixing assembly is located above the center of the mounting plate and includes a stirring shaft, stirring blades, and a stirring motor. The stirring motor is mounted above the mounting plate. The stirring shaft is located inside the mixing container, and the top of the stirring shaft is connected to the stirring motor. The stirring blades are equidistantly spaced on the stirring shaft. The mixing container is transparent.

[0007] Preferably, a stabilizing frame is fixedly mounted on the weighing platform, and the mixing container is placed inside the stabilizing frame.

[0008] Preferably, a shock-absorbing layer is provided on the inner side of the stabilizing frame in contact with the mixing container.

[0009] Preferably, the inlet is provided with an opening and closing assembly, which includes an adjusting ring, a sealing plate, and a worm gear. The mounting plate has an annular receiving cavity at the inlet. The adjusting ring is rotatably disposed in the annular receiving cavity. Multiple sets of sealing plates are arranged in a ring array in the annular receiving cavity. Adjacent sealing plates slide relative to each other. The adjusting ring has an arc-shaped groove corresponding to each set of sealing plates. A slider is limited and slidably disposed in the arc-shaped groove corresponding to each set of sealing plates. The worm gear is fixedly installed on the outer edge of the adjusting ring.

[0010] Preferably, an adjusting motor is also fixedly installed inside the mounting plate on one side of the worm gear, and the output end of the adjusting motor is also connected to a worm gear, which meshes with the worm gear for transmission.

[0011] Preferably, the mounting plate has a through hole at the mixing component, and the bottom of the stirring shaft is provided with a baffle of the same size as the through hole, wherein the size of the through hole is larger than the size of the stirring blade.

[0012] Preferably, a lifting seat is fitted around the outside of the stirring motor, and at least four sets of guide columns are vertically arranged around the lifting seat on the mounting plate. The guide columns pass through the circumference of the lifting seat, and the lifting seat moves vertically up and down along the guide columns. A lifting plate is provided on one side of the top of the lifting seat, and a lifting cylinder is provided between the lifting plate and the mounting plate.

[0013] Preferably, the thickness of the baffle in the middle is greater than the thickness of the surrounding area.

[0014] Preferably, a contact switch is also provided at the top of the guide column, and a timing device is also provided on one side of the mounting plate, with the contact switch electrically connected to the timing device.

[0015] In summary, the beneficial effects of this utility model are: it can quickly achieve the mixing of lithium iron phosphate powder and dispersant, quickly determine the particle size of lithium iron phosphate powder by sedimentation time, and has a simple structure and is easy to operate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the specific structure of the mounting plate of this utility model. Detailed Implementation

[0018] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art.

[0019] The term "comprising" and its variations as used herein signify open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "at least partially based on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0020] like Figure 1 and 2 The illustrated simple lithium iron phosphate particle size determination device includes a weighing platform 1, a mixing container 2, and a mixing assembly. The mixing container 2 is mounted on the weighing platform 1. A mounting plate 3 is provided on the top of the mixing container 2, and a sample inlet 4 is provided on one side of the mounting plate 3. The mixing assembly is located above the center of the mounting plate 3. The mixing assembly includes a stirring shaft 5, stirring blades 6, and a stirring motor 7. The stirring motor 7 is mounted above the mounting plate 3. The stirring shaft 5 is located inside the mixing container 2, and the top of the stirring shaft 5 is connected to the stirring motor 7. The stirring blades 6 are equidistantly arranged on the stirring shaft 5. The mixing container 2 is transparent.

[0021] A stabilizing frame 8 is fixedly mounted on the weighing platform 1, and the mixing container 2 is placed inside the stabilizing frame 8.

[0022] A shock-absorbing layer 9 is provided on the inner side of the stabilizing frame 8 in contact with the mixing container 2.

[0023] An opening and closing assembly is provided at the injection port 4. The opening and closing assembly includes an adjusting ring 10, a sealing plate 11, and a worm gear 12. The mounting plate 3 has an annular receiving cavity 13 at the injection port 4. The adjusting ring 10 is rotatably disposed in the annular receiving cavity 13. Multiple sets of sealing plates 11 are provided. The multiple sets of sealing plates 11 are arranged in an annular array in the annular receiving cavity 13. Adjacent sealing plates 11 slide relative to each other. An arc-shaped groove 14 is provided on the adjusting ring corresponding to each set of sealing plates 11. A slider 15 is limited and slidably disposed in the arc-shaped groove 14 corresponding to each set of sealing plates 11. The worm gear 12 is fixedly installed on the outer edge of the adjusting ring 10.

[0024] An adjusting motor 16 is also fixedly installed inside the mounting plate 3 on one side of the worm gear 12. The output end of the adjusting motor 16 is also connected to a worm 17, which meshes with the worm gear 12 for transmission.

[0025] The mounting plate 3 has a through hole 18 at the mixing component, and the bottom of the stirring shaft 5 is provided with a baffle 19 of the same size as the through hole 18. The size of the through hole 18 is larger than the size of the stirring blade 6.

[0026] A lifting seat 20 is fitted around the outside of the stirring motor 7. At least four sets of guide columns 21 are vertically arranged around the lifting seat 20 on the mounting plate 3. The guide columns 21 pass through the circumference of the lifting seat 20, and the lifting seat 20 moves vertically up and down along the guide columns 21. A lifting plate 22 is provided on one side of the top of the lifting seat 20. A lifting cylinder 23 is provided between the lifting plate 22 and the mounting plate 3.

[0027] The thickness of the middle part of the baffle 19 is greater than the thickness of the surrounding parts, that is, the upper surface of the baffle 19 is a slope, so no liquid will remain.

[0028] A contact switch 24 is also provided at the top of the guide column 21, and a timing device 25 is also provided on one side of the mounting plate 3. The contact switch 24 is electrically connected to the timing device 25. After the lifting seat 20 is raised to the top and the stirring shaft 5 is completely separated from the liquid surface, the contact switch 24 starts the timing device 25 to start timing. The particle size of lithium iron phosphate powder is determined by the settling time. The threshold time is determined by multiple time intervals. Particles that have completed settling within the threshold time meet the particle size distribution requirements.

[0029] This invention can quickly achieve mixing of lithium iron phosphate powder and dispersant, and can quickly determine the particle size of lithium iron phosphate powder by sedimentation time. It has a simple structure and is easy to operate.

[0030] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A simple device for measuring the particle size of lithium iron phosphate, characterized by, The device includes a weighing platform, a mixing container, and a mixing assembly. The mixing container is mounted on the weighing platform and has a mounting plate on its top. A sample inlet is located on one side of the mounting plate. The mixing assembly is positioned above the center of the mounting plate and includes a stirring shaft, stirring blades, and a stirring motor. The stirring motor is mounted above the mounting plate. The stirring shaft is located inside the mixing container and is connected to the stirring motor at its top. The stirring blades are evenly spaced on the stirring shaft. The mixing container is transparent.

2. The simple device for measuring the particle size of lithium iron phosphate of claim 1, wherein: A stabilizing frame is fixedly mounted on the weighing platform, and the mixing container is placed inside the stabilizing frame.

3. The simple device for measuring the particle size of lithium iron phosphate of claim 2, characterized in that: A shock-absorbing layer is provided on the inner side of the stabilizing frame in contact with the mixing container.

4. The simple device for measuring the particle size of lithium iron phosphate of claim 1, wherein: An opening and closing assembly is provided at the injection port, which includes an adjusting ring, a sealing plate, and a worm gear. The mounting plate has an annular receiving cavity at the injection port. The adjusting ring is rotatably disposed within the annular receiving cavity. Multiple sets of sealing plates are arranged in a circular array within the annular receiving cavity, and adjacent sealing plates slide relative to each other. An arc-shaped groove is provided on the adjusting ring corresponding to each set of sealing plates, and a slider is limited and slidably disposed within the corresponding arc-shaped groove of each set of sealing plates. The worm gear is fixedly installed on the outer edge of the adjusting ring.

5. The simple device for measuring the particle size of lithium iron phosphate of claim 1, wherein: An adjusting motor is also fixedly installed inside the mounting plate on one side of the worm gear. The output end of the adjusting motor is also connected to a worm, which meshes with the worm gear for transmission.

6. The simple device for measuring the particle size of lithium iron phosphate of claim 1, wherein: The mounting plate has a through hole at the mixing component, and the bottom of the stirring shaft is provided with a baffle of the same size as the through hole. The size of the through hole is larger than the size of the stirring blade.

7. The simple device for measuring the particle size of lithium iron phosphate of claim 1, wherein: A lifting seat is fitted around the outside of the stirring motor. At least four sets of guide columns are vertically arranged around the lifting seat on the mounting plate. The guide columns pass through the circumference of the lifting seat, and the lifting seat moves vertically up and down along the guide columns. A lifting plate is provided on one side of the top of the lifting seat, and a lifting cylinder is provided between the lifting plate and the mounting plate.

8. The simple device for measuring the particle size of lithium iron phosphate of claim 6, wherein: The thickness of the baffle in the middle is greater than the thickness around the edges.

9. The simple device for measuring the particle size of lithium iron phosphate of claim 7, wherein: A contact switch is also provided at the top of the guide column, and a timing device is also provided on one side of the mounting plate. The contact switch is electrically connected to the timing device.

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