A lithium iron phosphate compaction density testing device

Abstract

A kind of lithium iron phosphate compaction density testing device, it relates to material testing technical field, including: base, center is equipped with the support column rotating around its own axis;Carrying mechanism, including being equipped on support column support frame, support frame is equipped with multiple rotating rotating frame along its circumference, rotating frame is rotatably mounted with carrying frame, carrying frame is equipped with multiple carrying tube along its circumference, carrying tube is equipped with carrying plate in, for receiving lithium iron phosphate;Compaction mechanism, including multiple respectively located on the upper and lower sides of support frame, and along vertical direction moving support block and pressing block, when application, support block is in contact with the bottom of carrying tube, and pressing block is arranged in carrying tube;Detection mechanism, including multiple respectively located on the upper and lower sides of support frame weighing module and laser ranging module, for detecting compaction density;Transfer mechanism, including multiple being equipped below support frame, and along vertical direction moving collection tube, for collecting lithium iron phosphate.The device can automatically realize the detection of compaction density, and improve efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of material testing, and particularly to a lithium iron phosphate compaction density testing device. BACKGROUND

[0002] The compaction density of lithium iron phosphate is a key indicator for evaluating its performance as a positive material of lithium ion battery, and directly affects the volume energy density, cycle life and safety of the battery. The compaction density (g / cm3) refers to the mass of lithium iron phosphate powder in a unit volume under a specific pressure. In the prior art, when monitoring the compaction density of lithium iron phosphate, the powder is filled into a sample cup, the powder is naturally settled by tapping the cup wall, and then a standard pressure head (such as a flat head pressure column with a diameter matching the sample cup) is used to apply pressure. According to the national standard (such as GB / T 30835-2014: "Carbon composite lithium iron phosphate positive material for lithium ion battery"), the pressure is generally controlled at 100 MPa-500 MPa, and the pressure needs to be stable and uniformly distributed. The compaction time is controlled at 10 seconds-30 seconds, and the pressure is continuously applied during this process to ensure that the powder is fully compacted. Then, an electronic balance with a precision of 0.001g is used to weigh the total mass of the sample cup after compaction. During the test, multiple parallel tests are usually performed on the same sample to reduce errors, and the average value is taken. In order to further ensure the accuracy of the test results, a standard substance (such as high-purity graphite) with known compaction density is usually used to verify the accuracy of the test method.

[0003] However, in actual operation, the detection process is basically manual, that is, the lithium iron phosphate powder is manually filled into the sample cup, and the powder is naturally settled by manual vibration. Then the sample cup is placed in a pressure applying device to compact the lithium iron phosphate powder, and then the sample cup is weighed as a whole and the volume of the compacted lithium iron phosphate powder is measured. During compaction, only one or a limited number of sample cups can be placed, which is low in efficiency. Moreover, since the lithium iron phosphate powder is compacted in the sample cup, it is difficult to remove the lithium iron phosphate powder, which requires a lot of time and is not conducive to improving the detection efficiency. SUMMARY

[0004] In view of the above-mentioned deficiencies of the related prior art, the present application provides a lithium iron phosphate compaction density testing device, which can automatically detect the compaction density and improve the efficiency, and has strong practicality.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technology:

[0006] A lithium iron phosphate compaction density testing device, comprising: a base, a bearing mechanism, a compaction mechanism, a detection mechanism, and a transfer mechanism.

[0007] The compacting mechanism, the detecting mechanism and the transferring mechanism are arranged at intervals along the circumferential direction of the base; the center of the base is provided with a support column rotating around its axis, and the upper part is provided with a circular track; the bearing mechanism comprises a support frame mounted on the support column, and a plurality of rotating frames rotating in the radial direction are arranged in the circumferential direction on the support frame; one end of the rotating frame is slidably fitted below the track; the bearing frame is rotatably mounted on the rotating frame and arranged vertically along the axis; a plurality of bearing pipes are arranged at intervals along the circumferential direction of the bearing frame; the bearing plate is movably arranged along the axis in the bearing pipe and used for bearing the lithium iron phosphate; the compacting mechanism comprises a plurality of support blocks and pressing blocks movably arranged in the vertical direction on the upper and lower sides of the support frame; in application, the support blocks are in contact with the bottom of the bearing pipe, and the pressing blocks are arranged in the bearing pipe and used for compacting the lithium iron phosphate; the detecting mechanism comprises a plurality of weighing modules and laser ranging modules arranged on the upper and lower sides of the support frame; the weighing modules are movably arranged in the vertical direction and used for weighing the lithium iron phosphate; and the laser ranging modules are used for measuring the thickness of the compacted lithium iron phosphate; the transferring mechanism comprises a plurality of collecting pipes movably arranged in the vertical direction below the support frame; in application, the collecting pipes are aligned with the ports of the bearing pipes, and the bearing plate moves downward so that the compacted lithium iron phosphate enters the collecting pipes.

[0008] Further, the rotating frame is provided with a connecting shaft at each end; one of the connecting shafts is rotatably mounted on the support frame, and the other connecting shaft is rotatably mounted on the moving block and provided with a driven gear; the moving block is slidably fitted to the bottom surface of the track; in application, the teeth of the driven gear are fitted with a limiting block, the outer side of the limiting block is provided with a jack, the jack is arranged in the moving block, a first spring is sleeved on the jack, the two ends of the first spring are respectively abutted to the moving block and the limiting block, and the first spring is always in a compressed state.

[0009] Further, the top surface of the rotating frame is provided with a plurality of arc-shaped guide rods in the circumferential direction; the bearing frame is sleeved on the guide rods; a plurality of positioning rods are arranged in the circumferential direction of the bearing frame; the lower end of the positioning rod is arranged in the rotating frame, and the upper end of the positioning rod is arranged in the support frame mounted on the bearing frame; the positioning rod is provided with a connecting plate and sleeved with a second spring; the two ends of the second spring are respectively abutted to the support frame and the connecting plate, and the second spring is always in a compressed state.

[0010] Further, in application, the connecting plate on one of the rotating frames is arranged with a vibrating rod, the vibrating rod is provided with a retaining ring for abutting to the bottom surface of the connecting plate, and the lower end of the vibrating rod is mounted on a vibrating module reciprocatingly arranged in the circumferential direction of the rotating frame and movably arranged in the vertical direction.

[0011] Further, the outer wall of the bearing frame is provided with a plurality of protrusions arranged at equal intervals in the circumferential direction, the bearing tube is arranged in the protrusion, the outer wall of the bearing tube is provided with a snap ring, the snap ring abuts the top surface of the protrusion, in use, the top surface of the snap ring is matched with a positioning block, the positioning block is installed on the rotating ring, the inner side of the rotating ring is provided with a plurality of sliding blocks arranged at equal intervals in the circumferential direction, the sliding blocks are sleeved on the sliding rods, the sliding rods are arc-shaped and both ends are installed on the connecting blocks, the connecting blocks are installed on the bearing frame, the third spring is sleeved on the sliding rod, and both ends of the third spring abut the sliding block and the connecting block respectively and are always in a compressed state.

[0012] Further, the rotating ring is provided with a connecting rod arranged at the center, the lower end of the connecting rod is provided with a bottom plate, the periphery of the bottom plate is provided with a plurality of supporting rods arranged at equal intervals in the circumferential direction, the end of the supporting rod is provided with a clamping block, the bottom surface of the bearing plate is provided with a protruding rod, the protruding rod passes through the bearing tube, and the end is provided with a clamping ring, in use, the clamping ring is matched in the clamping block, the fourth spring is sleeved on the connecting rod, and both ends of the fourth spring abut the bottom plate and the rotating ring respectively and are always in a compressed state, the upper end of the connecting rod is provided with a stop ring for abutting the top surface of the rotating ring.

[0013] Further, the bottom surface of the positioning block is provided with a vertical rod arranged in the clamping block.

[0014] Further, the bottom of the supporting block is connected to the supporting rod, the supporting rod is installed on the connecting ring, the bottom of the connecting ring is provided with a plurality of penetrating rods arranged at equal intervals in the circumferential direction, the penetrating rods are arranged in the supporting ring, the supporting ring is installed at the center of the first rotating shaft, the first rotating shaft is rotatably installed on the base frame and connected to the output end of the first power equipment, the first power equipment is installed on the base frame, the base frame is installed below the base, the outer side of the base frame is provided with a pressure block, the pressure block is annular and the top surface is provided with a plurality of inclined grooves arranged at equal intervals in the circumferential direction, in use, the lower end of the supporting rod is in contact with the inclined groove.

[0015] Further, the weighing module is installed on the lifting ring, the lifting ring is connected to the moving end of the first vertical lifting mechanism, the first vertical lifting mechanism is installed on the base, the inner side of the lifting ring is provided with a plurality of push rods arranged at equal intervals in the circumferential direction, the push rod is arc-shaped and includes two vertical sections and a transition section connecting the two vertical sections, in use, the side surface of the push rod is in contact with the edge of one side of the supporting rod.

[0016] Further, the collecting pipes are provided with a pressing rod arranged above the supporting frame, the upper end of the pressing rod is connected to the rotating rod, one end of the rotating rod is sleeved on the transmission shaft and matched with a key groove, the transmission shaft is rotatably installed on the mounting frame and connected to the output end of the second power equipment at one end, one end of the rotating rod is rotatably matched with the lifting block, the lifting block is connected to the moving end of the second vertical lifting mechanism, the second power equipment, the mounting frame and the second vertical lifting mechanism are all installed on the track, in use, one of the rotating frames is rotated by 180 degrees, and the lower end of the pressing rod is in contact with the bottom plate.

[0017] Further, the transfer mechanism further comprises a cross frame located at the collecting pipe, the cross frame is connected to the moving end of the horizontal linear mechanism, the horizontal linear mechanism is installed on the base, a second rotating shaft is rotatably installed on the cross frame, one end of the second rotating shaft is connected to the output end of the third power equipment, and a driving gear is installed on the second rotating shaft, in application, the driving gear is engaged with a driven gear, a protruding portion is arranged on the outer side of the cross frame, the end of the protruding portion exceeds the outer side surface of the driving gear by a predetermined distance, and the end of the protruding portion is used for abutting to the limiting block.

[0018] The application has the advantages that: the bearing mechanism can bear a plurality of bearing pipes filled with lithium iron phosphate powder, automatically realize vibration settlement of the bearing pipes, and automatically realize transfer of the bearing pipes in the subsequent process, effectively improve the detection efficiency of the lithium iron phosphate powder in the process of pressure application, detection, etc.; the transfer mechanism can automatically move the lithium iron phosphate powder in the bearing pipe out, reduce the time for cleaning the bearing pipe, and be more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings described herein are only for illustrating selected embodiments, rather than all possible embodiments, and are not intended to limit the scope of the application.

[0020] Figure 1 It is a whole structure perspective view of the embodiment of the application.

[0021] Figure 2 It is a bearing mechanism perspective view of the embodiment of the application.

[0022] Figure 3 It is an A enlarged view of the embodiment of the application. Figure 2

[0023] Figure 4 It is a limiting block cooperation view of the embodiment of the application.

[0024] Figure 5 It is an assembly view between the bearing frame and the rotating frame of the embodiment of the application.

[0025] Figure 6 It is an assembly view between the bearing frame and the rotating ring of the embodiment of the application.

[0026] Figure 7 It is a bearing pipe cross-section structure view of the embodiment of the application.

[0027] Figure 8 It is a rotating frame perspective view of the embodiment of the application located in the compaction mechanism.

[0028] Figure 9 It is a compaction mechanism perspective view of the embodiment of the application.

[0029] Figure 10 It is a rotating frame perspective view of the embodiment of the application located in the detection mechanism.​

[0030] Figure 11 The lifting ring of the embodiment of the application is a perspective view.

[0031] Figure 12 The rotating frame of the embodiment of the application is a perspective view of the rotating frame in the transfer mechanism.

[0032] Figure 13 The enlarged view of B of the embodiment of the application is shown. Figure 12

[0033] Figure 14 The driving gear installation view of the embodiment of the application is shown.

[0034] Legend: 100 - base, 200 - bearing mechanism, 300 - compaction mechanism, 400 - detection mechanism, 500 - transfer mechanism, 101 - support column, 102 - track, 201 - support frame, 202 - rotating frame, 203 - bearing frame, 204 - bearing tube, 205 - bearing plate, 206 - connecting shaft, 207 - moving block, 208 - driven gear, 209 - limiting block, 210 - jacking rod, 211 - first spring, 212 - guide rod, 213 - positioning rod, 214 - support, 215 - connecting plate, 216 - second spring, 217 - vibrating rod, 218 - retaining ring, 219 - protruding block, 220 - clamping ring, 221 - positioning block, 222 - rotating ring, 223 - sliding block, 224 - sliding rod, 225 - connecting block, 226 - third spring, 227 - connecting rod, 228 - bottom plate, 229 - support rod, 230 - clamping block, 231 - protruding rod, 232 - clamping ring, 233 - fourth spring, 234 - retaining ring, 235 - vertical rod, 301 - support block, 302 - pressing block, 303 - support rod, 304 - connecting ring, 305 - penetrating rod, 306 - support ring, 307 - first rotating shaft, 308 - base frame, 309 - pressure bearing block, 310 - inclined chute, 401 - weighing module, 402 - laser ranging module, 403 - lifting ring, 404 - push rod, 501 - collection tube, 502 - pressing rod, 503 - rotating rod, 504 - transmission shaft, 505 - mounting frame, 506 - lifting block, 507 - cross frame, 508 - second rotating shaft, 509 - driving gear, 510 - protruding part. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the application more clear, the embodiments of the application are described in detail below with reference to the drawings, but the described embodiments of the application are only part of the embodiments of the application, not all the embodiments of the application.

[0036] As Figures 1-11 ​As shown, the embodiment of the present application provides a kind of lithium iron phosphate compaction density testing device, comprising: base 100, bearing mechanism 200, compaction mechanism 300, detection mechanism 400, transfer mechanism 500.

[0037] Compaction mechanism 300, detection mechanism 400, transfer mechanism 500 are arranged along the circumferential direction of base 100;The center of base 100 is provided with support column 101 rotating around its axis, and the upper side is provided with circular track 102;Bearing mechanism 200 includes support frame 201 installed on support column 101, a plurality of rotation frames 202 are arranged at equal intervals along the circumferential direction of support frame 201 and are arranged along the radial direction, one end of rotation frame 202 is slidably fitted below track 102, and vertical bearing frame 203 is rotatably installed on rotation frame 202, a plurality of bearing tubes 204 are arranged at equal intervals along the circumferential direction of bearing frame 203, bearing plate 205 is movably arranged along the axis of bearing tube 204, for receiving lithium iron phosphate;Compaction mechanism 300 includes a plurality of support blocks 301 and pressing blocks 302, which are movably arranged along the vertical direction and located on the upper and lower sides of support frame 201 respectively, when one of rotation frames 202 is located above support block 301, support block 301 is moved upward and contacts the bottom of bearing tube 204, and support is provided for bearing tube 204 during compaction, while pressing block 302 is moved downward and penetrates bearing tube 204, to apply pressure to lithium iron phosphate powder and compact lithium iron phosphate powder;Detection mechanism 400 includes a plurality of weighing modules 401 and laser ranging modules 402, which are arranged on the upper and lower sides of support frame 201 respectively, and weighing module 401 is movably arranged along the vertical direction, when one of rotation frames 202 is located in detection mechanism 400, weighing module 401 is moved upward and bearing tube 204 is lifted upward by a predetermined distance, for weighing lithium iron phosphate, and laser ranging module 402 is used to measure the distance between laser emitting point and the surface of lithium iron phosphate, since the position of laser emitting point of laser ranging module 402 is determined, the initial position of bearing tube 204 and the distance of upward movement are determined, then the distance between laser emitting point and the top of bearing tube 204 after upward movement is determined, the depth of bearing tube 204 is added to the distance between laser emitting point and the top of bearing tube 204 after upward movement, and the distance between laser emitting point and the surface of lithium iron phosphate powder is subtracted, so that the thickness of lithium iron phosphate powder after compaction is obtained, and the compaction density of lithium iron phosphate powder can be obtained by calculation;Transfer mechanism 500 includes a plurality of collection tubes 501 arranged below support frame 201 and movably arranged along the vertical direction, when it is necessary to transfer lithium iron phosphate powder in bearing tube 204, rotation frame 202 located in transfer mechanism 500 is rotated by 180 degrees, so that the port of bearing tube 204 faces downward, collection tube 501 is aligned with the port of bearing tube 204, and bearing plate 205 moves downward, so that compacted lithium iron phosphate is pushed into collection tube 501.

[0038] Specifically, as shown in Figures 1-4 One of the connecting shafts 206 is rotatably installed on the support frame 201, and the other connecting shaft 206 is rotatably installed on the moving block 207 and is provided with a driven gear 208. The moving block 207 is slidingly fitted to the bottom surface of the track 102. In order to avoid rotation of the rotating frame 202 under the action of its own gravity, the tooth portion of the driven gear 208 is fitted with a limiting block 209, and the outer side of the limiting block 209 is provided with a jacking rod 210 which is provided through the moving block 207. A first spring 211 is sleeved on the jacking rod 210, and the two ends of the first spring 211 abut against the moving block 207 and the limiting block 209 respectively and are always in a compressed state. Under the action of the first spring 211, the limiting block 209 always has a tendency to move towards the driven gear 208, thereby ensuring the limiting of the driven gear 208 by the limiting block 209. When it is necessary to rotate the rotating frame 202, an action force opposite to the elastic force of the first spring 211 is applied to the limiting block 209 to release the limiting of the driven gear 208.

[0039] Specifically, as shown in Figure 5 The top surface of the rotating frame 202 is provided with a plurality of arc-shaped guide rods 212 in the circumferential direction. The bearing frame 203 is sleeved on the guide rods 212, and the bearing frame 203 is provided with a plurality of positioning rods 213 in the circumferential direction. The lower end of the positioning rod 213 is provided through the rotating frame 202, and the upper end of the positioning rod 213 is provided through the support 214 which is installed on the bearing frame 203. The positioning rod 213 is provided with a connecting plate 215 and is sleeved with a second spring 216. The two ends of the second spring 216 abut against the support 214 and the connecting plate 215 respectively and are always in a compressed state. Under the action of the second spring 216, the positioning rod 213 always has a tendency to move towards the rotating frame 202, thereby ensuring the relative fixation between the bearing frame 203 and the rotating frame 202, so that the bearing tube 204 is at a certain fixed position to facilitate subsequent operation. In addition, the lower end of the positioning rod 213 is removed from the rotating frame 202, and the bearing frame 203 can be reciprocatingly rotated, thereby vibrating and settling the lithium iron phosphate powder in the bearing tube 204.

[0040] Specifically, as shown in Figures 2-3As shown, when it is necessary to vibrate the bearing tube 204, a vibration rod 217 is provided in the connecting plate 215 on one of the rotating frames 202, the vibration rod 217 is provided with a stop ring 218 for abutting to the bottom surface of the connecting plate 215, the lower end of the vibration rod 217 is installed on a vibration module, the vibration module is reciprocatingly vibrated along the circumferential direction of the rotating frame 202 and is movably arranged along the vertical direction, for example, the vibration module is connected to the moving end of a vertical lifting mechanism, after the vibration rod 217 is provided in the connecting plate 215, the stop ring 218 abuts to the connecting plate 215 and forces the connecting plate 215 to move upward until the positioning rod 213 is removed from the rotating frame 202, at this time, the relative fixation between the bearing frame 203 and the rotating frame 202 is released, and the second spring 216 is further compressed, then the vibration module is started, for example, an electromagnetic vibration device is used, periodic vibration is generated by the attraction and release of the electromagnet, the amplitude is amplified by the spring, the vibration rod 217 is reciprocatingly vibrated along the circumferential direction of the rotating frame 202, and the bearing frame 203 is also reciprocatingly vibrated synchronously, so that the lithium iron phosphate powder is settled to facilitate the subsequent compaction work.

[0041] Specifically, as shown in the drawings, Figure 6 In order to avoid the bearing tube 204 from falling during the overturning of the rotating frame 202, a plurality of protrusions 219 are arranged on the outer wall of the bearing frame 203 along the circumferential direction, the bearing tube 204 is provided in the protrusions 219, and the outer wall of the bearing tube 204 is provided with a snap ring 220, the snap ring 220 abuts to the top surface of the protrusion 219, and the top surface of the snap ring 220 is matched with a positioning block 221, the positioning block 221 is installed on a rotating ring 222, a plurality of sliding blocks 223 are arranged on the inner side of the rotating ring 222 along the circumferential direction thereof, the sliding blocks 223 are sleeved on a sliding rod 224, the sliding rod 224 is arc-shaped and both ends thereof are installed on a connecting block 225, the connecting block 225 is installed on the bearing frame 203, a third spring 226 is sleeved on the sliding rod 224, the both ends of the third spring 226 abut to the sliding blocks 223 and the connecting block 225 respectively, and the third spring 226 is always in a compressed state, the third spring 226 ensures the limiting of the bearing tube 204, when it is necessary to take out the bearing tube 204, only need to apply a force to the rotating ring 222 which is opposite to the elastic force of the third spring 226 to move the positioning block 221 away from above the snap ring 220, and then the bearing tube 204 can be taken out.

[0042] Specifically, as shown in the drawings, Figures 6-7As shown, in order to avoid the bearing plate 205 moving up and down in the bearing tube 204, a connecting rod 227 is arranged through the center of the rotating ring 222, the lower end of the connecting rod 227 is provided with a bottom plate 228, a plurality of spaced-apart supporting rods 229 are arranged on the circumferential side of the bottom plate 228 in the circumferential direction, the end of the supporting rod 229 is provided with a clamping block 230, the bottom surface of the bearing plate 205 is provided with a protruding rod 231, the protruding rod 231 penetrates through the bearing tube 204, and the end of the protruding rod 231 is provided with a clamping ring 232, when it is necessary to limit the bearing plate 205, the clamping ring 232 is matched in the clamping block 230, the fourth spring 233 is sleeved on the connecting rod 227, the two ends of the fourth spring 233 abut to the bottom plate 228 and the rotating ring 222 respectively, and the fourth spring 233 is always in the compressed state, the upper end of the connecting rod 227 is provided with a stop ring 234, which is used for abutting to the top surface of the rotating ring 222, avoiding the bottom plate 228 falling, under the action of the fourth spring 233, the bottom plate 228 always has the tendency of moving downward, even if the clamping ring 232 is subjected to a certain external force, the fourth spring 233 can also offset, so as to ensure that the bearing plate 205 is always located at the bottom of the bearing tube 204, avoiding the bearing plate 205 moving up and down during the vibration process, and after the rotating frame 202 is turned over by 180 degrees and the bearing plate 205 is moved towards the opening of the bearing tube 204, the bearing plate 205 can be reset under the action of the fourth spring 233.

[0043] More specifically, as shown in Figure 6 The bottom surface of the positioning block 221 is provided with a vertical rod 235, the lower end of the vertical rod 235 penetrates into the clamping block 230, so that when the rotating ring 222 or the bottom plate 228 rotates, the other one can be synchronously driven to rotate, ensuring the synchronous rotation of the two.

[0044] Specifically, as shown in Figures 8-9As shown, the bottom of the support block 301 is connected to the support rod 303, the support rod 303 is installed on the connecting ring 304, the connecting ring 304 is provided with a plurality of penetrating rods 305 at the bottom along the circumferential direction, the penetrating rods 305 are penetrated in the support ring 306, the support ring 306 is installed at the center of the first rotating shaft 307, the first rotating shaft 307 is rotatably installed on the chassis 308 and is connected to the output end of the first power equipment, the first power equipment is installed on the chassis 308, the chassis 308 is installed below the base 100, the outer side of the chassis 308 is provided with the pressure block 309, the pressure block 309 is annular and is provided with a plurality of inclined grooves 310 arranged at intervals at the top along the circumferential direction, when it is needed to compact the lithium iron phosphate powder in the bearing tube 204, at this time, the support column 101 is driven to rotate, one of the rotating frames 202 bearing the vibrated lithium iron phosphate powder is located below the pressure block 302, then the first rotating shaft 307 is driven to rotate by the first power equipment and drives the support ring 306 to rotate, under the action of the inclined groove 310, the support rod 303 will be forced to move upward and rotate around the axis of the first rotating shaft 307, when the lower end of the support rod 303 is located at the top of the pressure block 309, the top of the support block 301 is flush with the bottom of the bearing tube 204, then the support ring 306 is continuously driven to rotate, the support block 301 will move to the lower side of the bearing tube 204 and provide support for the bearing tube 204, then when the lithium iron phosphate powder is compacted, the pressure block 302 is moved downward, the pressure block 302 enters the bearing tube 204 and compacts the lithium iron phosphate powder, the bearing tube 204 is further supported by the pressure block 309 and the support block 301 during the compacting operation, so that the rotating frame 202 is prevented from being deformed under great pressure, and the up-down movement of the pressure block 302 can be achieved by connecting the pressure block 302 to a pressure seat, and connecting the pressure seat to the moving end of a vertical lifting mechanism, such as the extension end of a hydraulic cylinder.

[0045] Specifically, as Figures 10-11As shown, the weighing module 401 is installed on the lifting ring 403, the lifting ring 403 is connected to the moving end of the first vertical lifting mechanism, the first vertical lifting mechanism is installed on the base 100, and a plurality of push rods 404 are arranged at intervals in the circumferential direction of the inner side of the lifting ring 403. The push rod 404 is arc-shaped and includes two vertical segments and a transition segment connecting the two vertical segments. When it is necessary to weigh the lithium iron phosphate powder in the carrying pipe 204, the support column 101 is continuously driven to rotate, so that the rotating frame 202 carrying the compacted lithium iron phosphate powder is located above the weighing module 401. Then the lifting ring 403 is driven upward by the first vertical lifting mechanism. At this time, the side surface of the transition segment of the push rod 404 will be in contact with the edge of one side of the support rod 229. At this time, the bottom plate 228 will be forced to rotate, and the rotating ring 222 will also rotate synchronously under the drive of the vertical rod 235, so as to move the positioning block 221 away from above the clasp ring 220 and separate the clamping block 230 from the clamping ring 232. At this time, the third spring 226 is further compressed until the support rod 229 is in contact with the vertical segment of the push rod 404. At this time, the lifting ring 403 continues to move upward until the weighing module 401 lifts the carrying pipe 204 and drives the carrying pipe 204 to move upward by a predetermined distance. At this time, the weight of the entire carrying pipe 204 plus the compacted lithium iron phosphate powder can be known through the weighing module 401. Since the weight of the entire carrying pipe 204 is known, only the weight of the entire carrying pipe 204 needs to be subtracted to obtain the weight of the compacted lithium iron phosphate powder. Then the distance between the end face of the compacted lithium iron phosphate powder and the laser ranging module 402 is measured by the laser ranging module 402. Since the position of the laser ranging module 402 is fixed, the distance between the laser ranging module 402 and the mouth of the carrying pipe 204 is also determined. Then the distance between the laser emitting point of the laser ranging module 402 and the top end of the carrying pipe 204 after moving upward plus the depth of the carrying pipe 204 minus the distance between the laser emitting point and the surface of the lithium iron phosphate powder can be known. The thickness of the compacted lithium iron phosphate powder can be known, and the volume of the compacted lithium iron phosphate powder can be known by multiplying the thickness by the area of the bottom surface of the carrying pipe 204. The compacted density can be known by dividing the mass of the lithium iron phosphate by the volume. Then the lifting ring 403 is moved downward to reset. The rotating ring 222 and the bottom plate 228 are also reset under the action of the third spring 226. The laser ranging module 402 can be installed on a top frame, and the top frame is installed on the track 102.

[0046] Specifically, as Figures 12-14As shown, the collecting pipe 501 is provided with a pressing rod 502 above the support frame 201, the upper end of the pressing rod 502 is connected to a rotating rod 503, one end of the rotating rod 503 is sleeved on the transmission shaft 504, and a key groove is arranged on the transmission shaft 504, and a key pin is arranged on the inner wall of one end of the rotating rod 503, the key pin is slidingly fitted in the key groove, which not only ensures the relative sliding between the transmission shaft 504 and the rotating rod 503, but also ensures the power transmission between the two, the transmission shaft 504 is rotatably installed on the mounting frame 505, and one end is connected to the output end of the second power device, one end of the rotating rod 503 is rotatably fitted on the lifting block 506, and the lifting block 506 is connected to the moving end of the second vertical lifting mechanism, the second power device, the mounting frame 505 and the second vertical lifting mechanism are all installed on the track 102, when it is needed to take out the lithium iron phosphate powder in the bearing pipe 204 which is compacted, the rotating frame 202 bearing the lithium iron phosphate powder with the compacted density detected is moved to the upper side of the collecting pipe 501, and the rotating frame 202 is rotated by 180 degrees, then the collecting pipe 501 is moved upward to be aligned with the mouth of the bearing pipe 204, then the transmission shaft 504 is driven to rotate by the second power device, so that the pressing rod 502 is located directly above the bottom plate 228, then the rotating rod 503 is driven to move downward by the second vertical lifting mechanism, the lower end of the pressing rod 502 contacts the bottom plate 228, and the bottom plate 228 is also forced to move downward, the bearing plate 205 is driven to move toward the mouth of the bearing pipe 204 by the clamping block 230, so that the compacted lithium iron phosphate powder in the bearing pipe 204 is pushed out and enters the collecting pipe 501, and the fourth spring 233 is further compressed, then the pressing rod 502 is moved upward, the collecting pipe 501 is moved downward, the bottom plate 228 is reset under the action of the fourth spring 233, and the pressing rod 502 is rotated to reset around the axis of the transmission shaft 504, then the rotating frame 202 is rotated back by 180 degrees to reset, and for the movement of the collecting pipe 501, the collecting pipe 501 can be installed on a lifting frame, and the lifting frame is connected to the moving end of a vertical lifting mechanism, and the vertical lifting mechanism is installed on the base 100.

[0047] Specifically, as Figures 12-14As shown, in order to facilitate the rotation of the rotating frame 202, the transfer mechanism 500 further comprises a cross frame 507 located at the collecting pipe 501, the cross frame 507 is connected to the moving end of a horizontal linear mechanism, the horizontal linear mechanism is installed on the base 100, the second rotating shaft 508 is rotatably installed on the cross frame 507, one end of the second rotating shaft 508 is connected to the output end of the third power equipment, and the driving gear 509 is installed, in use, the driving gear 509 is engaged with the driven gear 208, the outer side of the cross frame 507 is provided with a protruding portion 510, the end of the protruding portion 510 exceeds the outer side of the driving gear 509 by a predetermined distance, and is used for abutting to the limiting block 209, the cross frame 507 is driven to move towards the driven gear 208 by the horizontal linear mechanism, the protruding portion 510 abuts to the limiting block 209, and forces the limiting block 209 to move, when the limiting block 209 has not completely separated from the driven gear 208, the driving gear 509 is engaged with the driven gear 208, when the limiting block 209 completely separates from the driven gear 208, the driving gear 509 is completely engaged with the driven gear 208, the first spring 211 is further compressed, then the second rotating shaft 508 is driven to rotate by the third power equipment, under the engagement transmission of the driving gear 509 and the driven gear 208, the rotating frame 202 is rotated, after the transfer of the lithium iron phosphate powder is completed, the rotating frame 202 is rotated back to reset, and the cross frame 507 is moved back, then the limiting block 209 is recombined with the driven gear 208 under the action of the first spring 211, and the rotating frame 202 is clamped again.

[0048] The above only describes the preferred embodiments of the present application and is not used to limit the present application. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A lithium iron phosphate compaction density testing device, characterized in that, include: The base has a centrally rotating support column and a circular track on top. The bearing mechanism includes a support frame mounted on the support column, a plurality of radially rotating frames arranged in a circular array on the support frame, one end of the rotating frame being slidably fitted under the track, a bearing frame rotatably mounted on the rotating frame with its axis arranged vertically, a plurality of bearing tubes arranged at intervals along its circumference on the bearing frame, and a bearing plate movable along its axis in the bearing tube for receiving lithium iron phosphate; Compaction mechanism, detection mechanism and transfer mechanism are arranged at intervals along the circumference of the base; The compaction mechanism includes multiple support blocks and pressure blocks located on the upper and lower sides of the support frame and movable in the vertical direction. When one of the rotating frames is located above the support block, the support block contacts the bottom of the bearing tube, and the pressure block passes through the bearing tube to compact the lithium iron phosphate. The testing mechanism includes multiple weighing modules and laser ranging modules respectively located on the upper and lower sides of the support frame. The weighing modules are movable in the vertical direction and are used to weigh the lithium iron phosphate. The laser ranging module is used to measure the thickness of the lithium iron phosphate after compaction. The transfer mechanism includes multiple collection tubes located below the support frame and movable in the vertical direction. When it is necessary to transfer lithium iron phosphate powder in the carrier tube, the collection tube is aligned with the port of the carrier tube, and the carrier plate moves downward so that the compacted lithium iron phosphate enters the collection tube. The outer wall of the support frame is provided with a plurality of equally spaced protrusions along the circumferential direction. The support tube passes through the protrusions. The outer wall of the support tube is provided with a retaining ring. The retaining ring abuts against the top surface of the protrusion. In order to prevent the support tube from falling off during the rotation of the rotating frame, a positioning block is fitted on the top surface of the retaining ring. The positioning block is installed on the rotating ring. The inner side of the rotating ring is provided with a plurality of sliders along its circumferential direction. The sliders are sleeved on the sliding rod. The sliding rod is arc-shaped and both ends are installed on the connecting block. The connecting block is installed on the support frame. A third spring is sleeved on the sliding rod. The two ends of the third spring abut against the slider and the connecting block respectively, and are always in a compressed state. A connecting rod is inserted through the center of the rotating ring. A base plate is provided at the lower end of the connecting rod. Multiple support rods are arranged at intervals along the circumference of the base plate. A locking block is provided at the end of each support rod. A protruding rod is provided on the bottom surface of the bearing plate. The protruding rod passes through the bearing tube and has a retaining ring at its end. When the bearing plate needs to be limited, the retaining ring is engaged with the locking block. A fourth spring is sleeved on the connecting rod. The two ends of the fourth spring abut against the base plate and the rotating ring respectively and are always in a compressed state. A retaining ring is provided at the upper end of the connecting rod for abutting against the top surface of the rotating ring. The bottom surface of the positioning block is provided with a vertical rod, and the lower end of the vertical rod passes through the locking block; The weighing module is mounted on the lifting ring, which is connected to the moving end of the first vertical lifting mechanism. The first vertical lifting mechanism is mounted on the base. The inner side of the lifting ring is provided with a plurality of spaced push rods along its circumference. The push rods are arc-shaped and include two vertical sections and a transition section connecting the two vertical sections. When it is necessary to weigh the lithium iron phosphate powder in the bearing tube, the side of the push rod contacts the edge of one side of the support rod, forcing the base plate to rotate.

2. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that, Both ends of the rotating frame are provided with connecting shafts. One of the connecting shafts is rotatably mounted on the support frame, and the other connecting shaft is rotatably mounted on the moving block and is equipped with a driven gear. The moving block is slidably fitted on the bottom surface of the track. In order to prevent the rotating frame from rotating under its own weight, the teeth of the driven gear are fitted with a limit block. A push rod is provided on the outside of the limit block. The push rod passes through the moving block and is fitted with a first spring. The two ends of the first spring abut against the moving block and the limit block respectively, and are always in a compressed state.

3. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that, The rotating frame has multiple arc-shaped guide rods on its top surface along the circumferential direction. The support frame is sleeved on the guide rods. The support frame has multiple positioning rods passing through it along the circumferential direction. The lower end of the positioning rod passes through the rotating frame, and the upper end of the positioning rod passes through the bracket. The bracket is installed on the support frame. The positioning rod has a connecting plate and a second spring sleeved on it. The two ends of the second spring abut against the bracket and the connecting plate respectively, and are always in a compressed state.

4. The lithium iron phosphate compaction density testing device according to claim 3, characterized in that, When the bearing tube needs to vibrate, a vibrating rod is inserted through the connecting plate on one of the rotating frames. The vibrating rod is equipped with a retaining ring for abutting against the bottom surface of the connecting plate. The lower end of the vibrating rod is installed on the vibration module. The vibration module is set to reciprocate along the circumferential direction of the rotating frame and to move along the vertical direction.

5. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that, The bottom of the support block is connected to the support rod, which is mounted on the connecting ring. The bottom of the connecting ring has multiple through rods along its circumference, which pass through the support ring. The center of the support ring is mounted on a first rotating shaft, which is rotatably mounted on the base frame and connected to the output end of a first power device. The first power device is mounted on the base frame, which is mounted below the base. A pressure block is provided on the outer side of the base frame. The pressure block is annular, and its top surface has multiple spaced inclined grooves along its circumference. When it is necessary to compress the lithium iron phosphate powder in the bearing tube, the lower end of the support rod contacts the inclined grooves.

6. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that, A pressure rod is provided between the collection tubes above the support frame. The upper end of the pressure rod is connected to a rotating rod. One end of the rotating rod is sleeved on a drive shaft and keyway is used for engagement. The drive shaft is rotatably mounted on the mounting frame and one end is connected to the output end of the second power device. One end of the rotating rod is rotatably engaged with a lifting block. The lifting block is connected to the moving end of the second vertical lifting mechanism. The second power device, the mounting frame, and the second vertical lifting mechanism are all mounted on the track. When it is necessary to remove the compacted lithium iron phosphate powder from the bearing tube, one of the rotating frames rotates 180 degrees, and the lower end of the pressure rod contacts the base plate.

7. The lithium iron phosphate compaction density testing device according to claim 2, characterized in that, The transfer mechanism also includes a crossbeam located on the collection tube. The crossbeam is connected to the moving end of a horizontal linear mechanism, which is mounted on the base. A second rotating shaft is rotatably mounted on the crossbeam. One end of the second rotating shaft is connected to the output end of a third power device and is equipped with a drive gear. In application, the drive gear meshes with the driven gear. A protrusion is provided on the outer side of the crossbeam, and the end of the protrusion extends beyond the outer side of the drive gear by a predetermined distance to abut against the limiting block.

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