Lithium iron phosphate surface carbon coating content detection equipment

Abstract

The utility model relates to the technical field of battery production, in particular to lithium iron phosphate surface carbon coating content detection equipment, which comprises a box body provided with a feeding hole for adding a carbon-coated lithium iron phosphate raw material; the material storage device is mounted in the box body, is communicated with the feeding hole and is used for storing a carbon-coated lithium iron phosphate raw material; the stirring device is mounted in the box body and is used for stirring and smashing the carbon-coated lithium iron phosphate raw material in the material storage device; the liquid conveying device is mounted in the box body and is used for conveying a solution capable of separating lithium iron phosphate from carbon into the material storage device; the filtering and weighing device is mounted in the storage device and used for filtering and weighing carbon; the rapid detection device has the beneficial effects that the rapid detection of the carbon coating content in the lithium iron phosphate material is effectively realized, and the rapid detection device is convenient and practical.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and in particular relates to a device for detecting the carbon coating content on the surface of lithium iron phosphate. Background Art

[0002] Lithium iron phosphate batteries are lithium-ion batteries that use lithium iron phosphate as the positive electrode material. Typically, the surface of the lithium iron phosphate material is carbon-coated. This carbon coating effectively improves the conductivity of the lithium iron phosphate positive electrode material, reduces internal resistance, and increases the battery's discharge capacity and rate performance. Furthermore, the carbon coating protects the lithium iron phosphate particles from corrosion by the electrolyte solvent, extending the battery's cycle life. However, poor carbon coating can also cause the electrode to absorb large amounts of water quickly, making it more sensitive to ambient moisture.

[0003] At present, there is no detection equipment on the battery production line that can detect the degree of carbon coating of lithium iron phosphate, which makes it difficult for staff to analyze the incoming lithium iron phosphate materials. Utility Model Content

[0004] The purpose of the utility model is to provide a device for detecting the carbon coating content on the surface of lithium iron phosphate in order to solve the above-mentioned technical problems, so as to achieve the effect of detecting the carbon coating content of lithium iron phosphate.

[0005] In view of this, the present invention provides a device for detecting the carbon coating content on the surface of lithium iron phosphate, comprising:

[0006] A box body is provided with a feed port for adding carbon-coated lithium iron phosphate raw materials;

[0007] A material storage device is installed in the box and is connected to the feed port, and is used to store carbon-coated lithium iron phosphate raw materials;

[0008] A stirring device is installed in the box and is used to stir and break up the carbon-coated lithium iron phosphate raw material in the storage device;

[0009] An infusion device is installed in the box and is used to transport a solution capable of separating lithium iron phosphate from carbon into the storage device;

[0010] The filtering and weighing device is installed in the storage device and is used to filter and weigh the carbon weight.

[0011] Furthermore, the storage device includes:

[0012] Fixed seat, the fixed seat is installed in the box;

[0013] A material holding barrel, the material holding barrel is rotatably mounted on a fixed base;

[0014] A first driving mechanism is installed on the fixed seat and is used to control the rotation of the material barrel;

[0015] Among them, a discharge port is provided at the bottom of the material holding barrel, and a filtering and weighing device is installed at the discharge port.

[0016] Furthermore, the filter weighing device includes:

[0017] a tray, the tray being movably mounted at the discharge port along a first direction Z and being used to hold the filtered carbon;

[0018] A filter cartridge is mounted on the tray so as to be movable along a first direction Z;

[0019] The baffle is installed on the top of the filter cartridge and above the tray to cover the discharge port;

[0020] Scale: The scale is installed at the bottom of the tray and is used to measure the weight of the carbon placed on the tray.

[0021] Furthermore, the filtering and weighing device further comprises:

[0022] A second driving mechanism is installed in the fixing seat and is used to control the movement of the tray along the first direction Z;

[0023] The third driving mechanism is installed in the fixing seat and is used to control the filter cartridge to move along the first direction Z.

[0024] Furthermore, the filtering and weighing device further comprises:

[0025] The drying mechanism is installed at the bottom of the tray and is used to heat and dry the carbon placed on the tray.

[0026] Furthermore, it also includes:

[0027] The liquid collecting box is installed in the box body and is connected to the filter cartridge for collecting the filtrate.

[0028] Furthermore, it also includes:

[0029] The negative pressure mechanism has an output end connected to the filter cartridge through a liquid collecting tank, and is used to generate negative pressure in the filter cartridge.

[0030] Furthermore, the stirring device comprises:

[0031] The fourth driving mechanism is installed on the box body;

[0032] A stirring paddle, which is installed on the output end of the fourth driving mechanism;

[0033] The fourth driving mechanism is used to control the rotation of the stirring paddle.

[0034] Furthermore, the infusion device includes:

[0035] A liquid storage tank is installed in the box and is used to store a solution that can separate lithium iron phosphate from carbon;

[0036] Sprinkler head, which is installed on the liquid storage tank and is used to discharge the solution in the liquid storage tank;

[0037] Control valve: The control valve is installed on the sprinkler head to control the opening and closing of the sprinkler head.

[0038] Furthermore, it also includes:

[0039] The box cover is installed on the box body and is used to seal the feed port.

[0040] The beneficial effects of the utility model are:

[0041] The testing equipment uses a stirring device to break up the carbon-coated lithium iron phosphate raw material added to a storage device, separating the lithium iron phosphate and carbon in the carbon-coated lithium iron phosphate raw material. A KCl solution is then delivered to the storage device via an infusion device to separate the lithium iron phosphate and carbon. A filter weighing device is then used to separate the carbon and weigh it. Finally, the carbon coating content of the carbon-coated lithium iron phosphate is calculated. This effectively and conveniently enables rapid testing of the carbon coating content in carbon-coated lithium iron phosphate materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of the utility model

[0043] Figure 2 It is a cross-sectional view of the internal structure of the utility model;

[0044] Figure 3-Figure 5 This is a schematic diagram of the working state of the filtering and weighing device of the utility model;

[0045] The marks in the figure are:

[0046] 1. Box body; 11. Feed inlet; 12. Negative pressure hole; 13. Liquid collecting box; 14. Box cover; 2. Storage device; 21. Fixed seat; 22. Material storage bucket; 23. Armature winding; 24. Permanent magnet; 25. Storage groove; 3. Stirring device; 31. Stirring paddle; 4. Infusion device; 41. Liquid storage tank; 42. Sprinkler head; 5. Filter weighing device; 51. Tray; 52. Filter cartridge; 53. Baffle; 54. Weighing device; 55. Drying mechanism; 56. First electromagnetic coil; 57. Second electromagnetic coil; 58. First magnetic block; 59. Second magnetic block; Z, first direction. DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of this application.

[0048] In the description of this application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0049] Example 1:

[0050] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate, including:

[0051] The box body 1 is provided with a feed port 11 for adding carbon-coated lithium iron phosphate raw materials;

[0052] The material storage device 2 is installed in the box body 1 and is connected to the feed port 11, and is used to store carbon-coated lithium iron phosphate raw materials;

[0053] A stirring device 3 is installed in the box 1 and is used to stir and crush the carbon-coated lithium iron phosphate raw material in the storage device 2;

[0054] An infusion device 4 is installed in the box 1 and is used to deliver a solution capable of separating lithium iron phosphate from carbon into the storage device 2;

[0055] The filtering and weighing device 5 is installed in the storage device 2 and is used for filtering and weighing the carbon weight.

[0056] In this technical solution, when the detection equipment is working, the staff adds a certain weight of carbon-coated lithium iron phosphate powder into the storage device 2 through the feed port 11, and then turns on the stirring device 3. The stirring device 3 crushes the carbon-coated lithium iron phosphate raw material in the discharge device, so that the carbon-coated lithium iron phosphate raw material is separated into separate carbon and lithium iron phosphate.

[0057] Then, the infusion device 4 delivers a solution capable of separating lithium iron phosphate from carbon into the storage device 2. The solution may be a potassium chloride (KCl) solution. The density of the KCl solution is between that of carbon and lithium iron phosphate and does not chemically react with the carbon and lithium iron phosphate. When the separated carbon and lithium iron phosphate are stirred and mixed evenly with the KCl solution, the carbon will be located at the top layer, and the lithium iron phosphate will be located at the bottom layer.

[0058] After the carbon, lithium iron phosphate and KCl solution are evenly mixed, the filtering and weighing device 5 is started to filter and separate the evenly mixed materials so that only carbon is left for weighing and measurement. Then, the carbon coating degree of the lithium iron phosphate is calculated by the calculation formula "carbon content in carbon-coated lithium iron phosphate = (carbon weighing weight / weight of carbon-coated lithium iron phosphate added to the storage device 2) * 100%".

[0059] In summary, the detection device utilizes a stirring device 3 to break up the carbon-coated lithium iron phosphate raw material added to the storage device 2, thereby separating the lithium iron phosphate and carbon therein. A KCl solution is then delivered into the storage device 2 using an infusion device 4 to separate the lithium iron phosphate and carbon. The carbon is then separated and weighed using a filtering and weighing device 5, ultimately calculating the carbon coating content of the carbon-coated lithium iron phosphate. This device effectively and conveniently and practically enables rapid detection of the carbon coating content in carbon-coated lithium iron phosphate materials.

[0060] Example 2:

[0061] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0062] Furthermore, the storage device 2 includes:

[0063] The fixing seat 21 is installed in the box body 1;

[0064] A material holding barrel 22 is rotatably mounted on the fixing base 21;

[0065] A first driving mechanism is mounted on the fixing base 21 and is used to control the rotation of the material holding barrel 22;

[0066] The bottom of the material holding barrel 22 is provided with a discharge port, and the filtering and weighing device 5 is installed at the discharge port.

[0067] In the present technical solution, the material barrel 22 is rotatably connected to the fixed seat 21 by setting a bearing, and the carbon-coated lithium iron phosphate raw material is added into the material barrel 22 through the feed port 11. The stirring device 3 stirs and crushes the carbon-coated lithium iron phosphate raw material in the material barrel 22, and then the infusion device 4 delivers the KCl solution into the material barrel 22. The material barrel 22 is then controlled to rotate by the first driving mechanism, and the carbon, lithium iron phosphate and KCl solution in the barrel are stirred by the rotation of the material barrel 22 itself. At the same time, the stirring device 3 also stirs the material in the material barrel 22, thereby effectively improving the stirring efficiency, so that the carbon, lithium iron phosphate and KCl solution can be stratified faster, and finally the stratified material is discharged through the discharge port to the filtering and weighing device 5 for filtering and weighing.

[0068] The first driving mechanism can be composed of an armature winding 23 and a permanent magnet 24. The armature winding 23 is installed on the material bucket 22, and the permanent magnet 24 is installed on the fixed seat 21 and is located on the outside of the material bucket 22. The magnetic field generated by the armature winding 23 interacts with the magnetic field generated by the permanent magnet to realize the rotation of the material bucket 22.

[0069] The first driving mechanism can also be composed of a motor and a gear set, the gear set includes a driving gear and a driven gear, the motor is mounted on the fixed seat 21, the driving gear is mounted on the output shaft of the motor, and the driven gear is mounted on the material bucket 22. The driving gear and the driven gear are engaged with each other, and the motor drives the driving gear to rotate, which drives the driven gear to rotate, thereby realizing the rotation of the material bucket 22.

[0070] Example 3:

[0071] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0072] Furthermore, the filtering and weighing device 5 comprises:

[0073] The tray 51 is movably mounted at the discharge port along a first direction Z and is used to hold the filtered carbon;

[0074] The filter cartridge 52 is movably mounted on the tray 51 along a first direction Z;

[0075] The baffle 53 is installed on the top of the filter cartridge 52 and located above the tray 51, and is used to cover the discharge port;

[0076] A second driving mechanism is installed in the fixing base 21 and is used to control the tray 51 to move along the first direction Z;

[0077] A third driving mechanism is installed in the fixing seat 21 and is used to control the filter cartridge 52 to move along the first direction Z;

[0078] The weighing instrument 54 is installed at the bottom of the tray 51 and is used to measure the weight of the carbon placed on the tray 51 .

[0079] In this technical solution, when the material in the storage device 2 is being stirred, the baffle 53 is located at the discharge port of the material storage barrel 22 to block the discharge port; when the material is stirred evenly, the filtering and weighing device 5 is working, such as Figure 3-5 As shown, the second driving mechanism is first used to control the tray 51 to move upward along the first direction Z. The tray 51 drives the filter cartridge 52 and the baffle 53 to rise together. A storage groove 25 is formed between the outer wall of the tray 51 and the material bucket 22. The lithium iron phosphate at the bottom layer of the material will sink into the storage groove 25 for storage. Then the third driving mechanism controls the filter cartridge 52 to move upward along the first direction Z, driving the baffle 53 to separate from the tray 51, allowing the KCl solution and carbon in the material to flow into the tray 51 together. Then the filter cartridge 52 will filter the material flowing into the tray 51, so that the carbon can be left on the tray 51 for weighing and measurement, so that the carbon coating content of the carbon-coated lithium iron phosphate can be calculated. It is worth mentioning that the weighing instrument 54 installed at the bottom of the tray 51 can be an electronic weighing scale designed to be integrated with the tray 51 to measure the weight of the carbon quickly and accurately.

[0080] The second and third drive mechanisms can be pneumatic cylinders mounted within the fixed base 21, controlling the movement of the tray 51 and the filter cartridge 52, respectively. Alternatively, they can be composed of electromagnetic coils and magnetic blocks, with a first magnetic block 58 mounted on the bottom of the tray 51 and a second magnetic block 59 mounted on the filter cartridge 52. The first and second electromagnetic coils 56 and 57 are both mounted within the fixed base 21. When energized, the first electromagnetic coil 56 interacts with the first magnetic block 58, causing it to rise in the first direction Z, driving the tray 51. When energized, the second electromagnetic coil 57 interacts with the second magnetic block 59, causing it to rise in the first direction Z, driving the filter cartridge 52.

[0081] Example 4:

[0082] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0083] Furthermore, the filtering and weighing device 5 further comprises:

[0084] The drying mechanism 55 is installed at the bottom of the tray 51 and is used to heat and dry the carbon placed on the tray 51 .

[0085] In this technical solution, the drying mechanism 55 can be a ceramic heater, which heats the tray 51 after being powered on, so that the residual solution on the tray 51 is dried and removed, reducing the impact of the solution on the weighed carbon weight and effectively improving the measurement accuracy of the carbon weight.

[0086] Example 5:

[0087] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0088] Furthermore, it also includes:

[0089] The liquid collecting box 13 is installed in the box body 1 and is connected to the filter cartridge 52 for collecting the filtrate.

[0090] In this technical solution, the KCl solution is filtered through the filter cartridge 52 and then flows into the liquid collection tank 13 for storage, which facilitates subsequent recycling and secondary utilization by staff, helps reduce resource waste and improve economic benefits.

[0091] Example 6:

[0092] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0093] Furthermore, it also includes:

[0094] The negative pressure mechanism has an output end connected to the filter cartridge 52 via the liquid collecting tank 13 , and is used to generate negative pressure in the filter cartridge 52 .

[0095] In this technical solution, a negative pressure hole 12 is provided on the box body 1 to communicate with the negative pressure mechanism, and two connecting holes are provided on the liquid collecting box 13, which are respectively connected to the negative pressure hole 12 and the filter cartridge 52. The negative pressure mechanism can extract the liquid in the liquid collecting box 13 through the negative pressure hole 12, and at the same time can also generate a negative pressure effect on the filter hole of the filter cartridge 52, thereby accelerating the flow of the solution through the filter cartridge 52 and effectively improving the filtration efficiency.

[0096] Example 7:

[0097] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0098] Furthermore, the stirring device 3 comprises:

[0099] The fourth driving mechanism is installed on the box body 1;

[0100] A stirring paddle 31, which is mounted on the output end of the fourth driving mechanism;

[0101] The fourth driving mechanism is used to control the rotation of the stirring paddle 31 .

[0102] In this technical solution, the fourth driving mechanism can be a motor (not shown in the drawings of the specification), and the stirring paddle 31 is connected to the output shaft of the motor through a coupling. The motor drives the stirring paddle 31 to rotate in the material barrel 22 to achieve stirring of the material in the material barrel 22.

[0103] Example 8:

[0104] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0105] Furthermore, the infusion device 4 includes:

[0106] A liquid storage tank 41 is installed in the housing 1 and is used to store a solution capable of separating lithium iron phosphate from carbon;

[0107] A spray head 42 is mounted on the liquid storage tank 41 and is used to discharge the solution in the liquid storage tank 41;

[0108] The control valve is installed on the sprinkler head 42 and is used to control the opening and closing of the sprinkler head 42.

[0109] In this technical solution, the control valve can be a solenoid valve. When KCl solution needs to be injected into the material storage barrel 22, the solenoid valve opens, and the hydraulic pump uses the KCl solution in the liquid storage tank 41 to be sprayed into the material storage barrel 22 through the spray head 42. When the KCl solution in the material storage barrel 22 reaches a certain amount, the solenoid valve closes, and the liquid storage tank 41 no longer discharges the solution through the spray head 42. This structural design allows staff to flexibly control the opening and closing of the liquid storage tank 41, which is convenient and practical.

[0110] Example 9:

[0111] This embodiment provides a device for detecting the carbon coating content on the surface of lithium iron phosphate. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0112] Furthermore, it also includes:

[0113] The box cover 14 is installed on the box body 1 and is used to seal the feed port 11.

[0114] In this technical solution, by setting the box cover 14 to cover the feed port 11, it is possible to prevent external impurities and dust from entering the material bucket 22 through the feed port 11 when the equipment is not working. In addition, the box cover 14 is designed to be hingedly connected to the box body 1, which makes it convenient for the staff to open or close the box cover 14.

[0115] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A device for detecting carbon coating content on the surface of lithium iron phosphate, characterized in that: include: A box body (1), wherein the box body (1) is provided with a feed port (11) for adding carbon-coated lithium iron phosphate raw material; A material storage device (2), the material storage device (2) being installed in the box body (1) and communicating with the feed port (11), and being used for storing carbon-coated lithium iron phosphate raw materials; A stirring device (3), the stirring device (3) is installed in the box (1) and is used to stir and crush the carbon-coated lithium iron phosphate raw material in the storage device (2); An infusion device (4), the infusion device (4) being installed in the box (1) and used for conveying a solution capable of separating lithium iron phosphate from carbon into the storage device (2); A filtering and weighing device (5) is installed in the storage device (2) and is used for filtering and weighing the carbon weight.

2. The lithium iron phosphate surface carbon coating content detection device according to claim 1, characterized in that: The storage device (2) comprises: A fixing seat (21), wherein the fixing seat (21) is installed in the box body (1); A material holding barrel (22), the material holding barrel (22) being rotatably mounted on a fixing base (21); A first driving mechanism, which is mounted on a fixed seat (21) and is used to control the rotation of the material container (22); The bottom of the material holding barrel (22) is provided with a discharge port, and the filtering and weighing device (5) is installed at the discharge port.

3. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 2, characterized in that: The filtering and weighing device (5) comprises: a tray (51), the tray (51) being movably mounted at the discharge port along a first direction (Z) and being used to hold the filtered carbon; a filter cartridge (52), the filter cartridge (52) being mounted on the tray (51) so as to be movable along a first direction (Z); a baffle (53), the baffle (53) being mounted on the top of the filter cartridge (52) and located above the tray (51) for sealing the discharge port; A weighing instrument (54) is installed at the bottom of the tray (51) and is used to measure the weight of the carbon placed on the tray (51).

4. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 3, characterized in that: The filtering and weighing device (5) further comprises: a second driving mechanism, the second driving mechanism being installed in the fixing seat (21) and being used for controlling the tray (51) to move along a first direction (Z); A third driving mechanism is installed in the fixing seat (21) and is used to control the filter cartridge (52) to move along the first direction (Z).

5. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 3, characterized in that: The filtering and weighing device (5) further comprises: A drying mechanism (55) is installed at the bottom of the tray (51) and is used to heat and dry the carbon placed on the tray (51).

6. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 3, characterized in that: Also includes: A liquid collecting box (13) is installed in the box body (1) and is connected to the filter cartridge (52) for collecting filtrate.

7. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 6, characterized in that: Also includes: A negative pressure mechanism, wherein the output end of the negative pressure mechanism is connected to the filter cartridge (52) through the liquid collecting box (13) and is used to generate negative pressure in the filter cartridge (52).

8. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 1, characterized in that: The stirring device (3) comprises: A fourth driving mechanism, the fourth driving mechanism being mounted on the box body (1); A stirring paddle (31), wherein the stirring paddle (31) is mounted on the output end of the fourth driving mechanism; Wherein, the fourth driving mechanism is used to control the rotation of the stirring paddle (31).

9. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 1, characterized in that: The infusion device (4) comprises: A liquid storage tank (41), the liquid storage tank (41) is installed in the box (1) and is used to store a solution capable of separating lithium iron phosphate from carbon; A spray head (42), the spray head (42) being mounted on the liquid storage tank (41) and being used to discharge the solution in the liquid storage tank (41); A control valve is installed on the spray head (42) and is used to control the opening and closing of the spray head (42).

10. The device for detecting carbon coating content on the surface of lithium iron phosphate according to claim 1, characterized in that: Also includes: A box cover (14) is installed on the box body (1) and is used to seal the feed port (11).

Images