Lithium iron phosphate compaction density testing device

Abstract

A lithium iron phosphate compaction density testing device relates to the technical field of material testing, and comprises: a base, the center of which is provided with a support column rotating around its own axis; the bearing mechanism comprises a supporting frame arranged on the supporting column, a plurality of rotating frames are arranged on the supporting frame along the circumference of the supporting frame, a bearing frame is rotationally installed on the rotating frames, a plurality of bearing pipes are arranged on the bearing frame along the circumference of the bearing frame, and bearing plates are arranged in the bearing pipes and used for bearing lithium iron phosphate; the compacting mechanism comprises a plurality of supporting blocks and pressing blocks, the supporting blocks and the pressing blocks are located on the upper side and the lower side of the supporting frame respectively and move in the vertical direction, during application, the supporting blocks make contact with the bottom of the bearing pipe, and the pressing blocks are arranged in the bearing pipe in a penetrating mode; the detection mechanism comprises a plurality of weighing modules and laser ranging modules which are arranged on the upper side and the lower side of the supporting frame correspondingly and is used for detecting the compaction density; and the transferring mechanism comprises a plurality of collecting pipes which are arranged below the supporting frame, move in the vertical direction and are used for collecting lithium iron phosphate. According to the device, the compaction density can be automatically detected, and the efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material testing, and in particular to a lithium iron phosphate compaction density testing device. Background Art

[0002] The compaction density of lithium iron phosphate is a key indicator for evaluating its performance as a cathode material for lithium-ion batteries. It directly affects the battery's volumetric energy density, cycle life, and safety. The compaction density (g / cm³) refers to the mass of lithium iron phosphate powder per unit volume under a specific pressure. In the prior art, when monitoring the compaction density of lithium iron phosphate, powder needs to be filled into a sample cup, the cup wall is tapped lightly to allow the powder to settle naturally, and then pressure is applied with a standard indenter (such as a flat-head indenter with a diameter matching the sample cup). According to national standards (such as GB / T 30835-2014: "Carbon-composite lithium iron phosphate positive electrode materials for lithium-ion batteries"), the pressure is generally controlled at 100 MPa-500 MPa and needs to be kept stable and evenly distributed. The compaction time is controlled at 10 seconds to 30 seconds, and pressure is applied continuously during this process to ensure that the powder is fully dense. The total mass of the compacted sample cup is then weighed using an electronic balance with an accuracy of 0.001g. During the test process, the same sample is usually tested multiple times in parallel, and the average value is taken to reduce error. In addition, to further ensure the accuracy of the test results, standard substances with known compaction density (such as high-purity graphite) are usually used to verify the accuracy of the test method.

[0003] However, in actual operation, the entire detection process is basically carried out manually, that is, the lithium iron phosphate powder is manually filled into the sample cup, and it is manually vibrated to allow the powder to settle naturally. The sample cup is then placed in a pressure device to compact the lithium iron phosphate powder. The sample cup is then weighed as a whole, and the volume of the compacted lithium iron phosphate powder is measured. During compaction, usually only one or a limited number of sample cups can be placed, which is inefficient. In addition, since the lithium iron phosphate powder is compacted in the sample cup, it is difficult to remove the lithium iron phosphate powder, which takes a lot of time and is not conducive to improving detection efficiency. Summary of the Invention

[0004] In response to the above-mentioned deficiencies in the related existing technologies, the present application provides a lithium iron phosphate compaction density testing device, which can automatically detect the compaction density and improve efficiency, and has strong practicality.

[0005] In order to achieve the above object, the present invention adopts the following technologies: A lithium iron phosphate compaction density testing device comprises a base, a bearing mechanism, a compacting mechanism, a detecting mechanism, and a transferring mechanism.

[0006] The compacting mechanism, the detecting mechanism and the transferring mechanism are arranged at intervals along the circumferential direction of the base; a supporting column which rotates around its own axis is provided at the center of the base, and a circular track is provided on the top; the bearing mechanism comprises a supporting frame mounted on the supporting column, a plurality of rotating frames which rotate along the radial direction are arranged in a circumferential array on the supporting frame, one end of the rotating frame is slidably fitted under the track, a bearing frame with a vertically arranged axis is rotatably mounted on the rotating frame, a plurality of bearing tubes which are arranged at intervals along the circumferential direction thereof are provided on the bearing frame, a bearing plate which is arranged to move along its axis is provided in the bearing tube for receiving lithium iron phosphate; the compacting mechanism comprises a plurality of bearing tubes which are arranged at intervals along the circumferential direction thereof, and a bearing plate which is arranged to move along its axis is provided in the bearing tube for receiving lithium iron phosphate; the compacting mechanism comprises a plurality of bearing tubes which are respectively located on the upper and lower sides of the supporting frame and are arranged along the vertical direction thereof The support block and pressure block are arranged to move in the vertical direction. When used, the support block contacts the bottom of the load-bearing tube, and the pressure block is passed through the load-bearing tube to compact the lithium iron phosphate; the detection mechanism includes multiple weighing modules and laser ranging modules respectively arranged on the upper and lower sides of the support frame, and the weighing module is arranged to move in the vertical direction to weigh the weight of the lithium iron phosphate, and the laser ranging module is used to measure the thickness of the lithium iron phosphate after compaction; the transfer mechanism includes multiple collection tubes arranged below the support frame and arranged to move in the vertical direction. When used, the collection tube is aligned with the port of the load-bearing tube, and the load-bearing plate moves downward to allow the compacted lithium iron phosphate to enter the collection tube.

[0007] Furthermore, connecting shafts are provided at both ends of the rotating frame, one of the connecting shafts is rotatably installed on the support frame, and the other connecting shaft is rotatably installed on the moving block, and a driven gear is installed. The moving block slides and fits in the bottom surface of the track. When used, the tooth portion of the driven gear fits in with the limiting block, and a push rod is provided on the outside of the limiting block. The push rod is passed through the moving block, and a first spring is sleeved on the push rod. The two ends of the first spring respectively abut against the moving block and the limiting block, and are always in a compressed state.

[0008] Furthermore, a plurality of arc-shaped guide rods are provided on the top surface of the rotating frame along the circumferential direction, the supporting frame is sleeved on the guide rods, and a plurality of positioning rods are passed through the supporting frame along the circumferential direction. The lower ends of the positioning rods are passed through the rotating frame, and the upper ends of the positioning rods are passed through the bracket. The bracket is installed on the supporting frame, and a connecting plate is provided on the positioning rod, and a second spring is sleeved on the positioning rod. The two ends of the second spring respectively abut the bracket and the connecting plate, and are always in a compressed state.

[0009] Furthermore, during application, a vibration rod is passed through the connecting plate on one of the rotating frames, and a retaining ring is provided on the vibration rod for abutting against the bottom surface of the connecting plate. The lower end of the vibration rod is installed on the vibration module, and the vibration module is set to vibrate back and forth along the circumferential direction of the rotating frame and to move along the vertical direction.

[0010] Furthermore, the outer wall of the carrier is provided with a plurality of equally spaced protrusions along the circumferential direction, the carrier tube is passed through the protrusions, and the outer wall of the carrier tube is provided with a clamping ring, which abuts the top surface of the protrusion. When in use, the top surface of the clamping ring is matched with a positioning block, and 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 mounted on the sliding rod, the sliding rod is arc-shaped, and both ends are mounted on the connecting blocks, which are mounted on the carrier. A third spring is mounted on the sliding rod, and both ends of the third spring abut against the slider and the connecting block respectively, and are always in a compressed state.

[0011] Furthermore, a connecting rod is passed through the center of the rotating ring, a bottom plate is provided at the lower end of the connecting rod, a plurality of support rods are arranged at intervals along the circumferential direction on the circumferential side of the bottom plate, a clamping block is provided at the end of the support rod, a protruding rod is provided on the bottom surface of the bearing plate, the protruding rod passes through the bearing tube, and a clamping ring is provided at the end. When used, the clamping ring fits into the clamping block, a fourth spring is provided on the connecting rod, and the two ends of the fourth spring respectively abut against the bottom plate and the rotating ring, 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.

[0012] Furthermore, a vertical rod is provided on the bottom surface of the positioning block, and the lower end of the vertical rod is passed through the clamping block.

[0013] Furthermore, the bottom of the support block is connected to the support rod, the support rod is installed on the connecting ring, and a plurality of through rods are provided along the circumferential direction of the bottom of the connecting ring. The through rods are passed through the support ring, and the center of the support ring is installed on 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, and the base frame is installed under the base. A pressure block is provided on the outside of the base frame. The pressure block is annular, and a plurality of spaced inclined grooves are provided on the top surface along its circumferential direction. When used, the lower end of the support rod contacts the inclined groove.

[0014] Furthermore, the weighing module is installed on the lifting ring, the lifting ring is connected to the movable end of the first vertical lifting mechanism, the first vertical lifting mechanism is installed on the base, and a plurality of push rods are arranged at intervals along the circumferential direction of the inner side of the lifting ring. The push rods are arc-shaped and include two vertical sections and a transition section connecting the two vertical sections. When in use, the side of the push rod contacts the edge of one side of the support rod.

[0015] Furthermore, a pressure rod located above the support frame is provided between the collecting pipes, and the upper end of the pressure rod is connected to the rotating rod, one end of the rotating rod is sleeved on the transmission shaft and matched with a keyway, the transmission shaft is rotatably installed 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 matched on the lifting block, and 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 installed on the track. When in use, one of the rotating frames rotates 180 degrees, and the lower end of the pressure rod contacts the bottom plate.

[0016] Furthermore, the transfer mechanism also includes a horizontal frame located in the collection tube, the horizontal frame is connected to the movable end of the horizontal linear mechanism, the horizontal linear mechanism is installed on the base, a second rotating shaft is rotatably installed on the horizontal frame, one end of the second rotating shaft is connected to the output end of the third power device, and a driving gear is installed. When used, the driving gear is engaged with the driven gear, and a protrusion is provided on the outside of the horizontal frame. The end of the protrusion exceeds the outer side of the driving gear by a predetermined distance, and is used to abut against the limit block.

[0017] The beneficial effects of the present invention are as follows: the carrying mechanism can receive multiple carrying tubes filled with lithium iron phosphate powder, automatically realize the vibration sedimentation of the carrying tubes, and automatically realize the transfer of the carrying tubes in the subsequent process of pressurizing and detecting the lithium iron phosphate powder, thereby effectively improving the detection efficiency; the transfer mechanism can automatically remove the lithium iron phosphate powder in the carrying tube, thereby reducing the time for cleaning the carrying tube and being more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0019] Figure 1 It is a schematic three-dimensional diagram of the overall structure of an embodiment of the present application.

[0020] Figure 2 This is a three-dimensional schematic diagram of the supporting mechanism of an embodiment of the present application.

[0021] Figure 3 for Figure 2 A magnified schematic diagram of .

[0022] Figure 4 This is a schematic diagram of the coordination of the limiting blocks in an embodiment of the present application.

[0023] Figure 5 Schematic diagram of the assembly between the supporting frame and the rotating frame according to an embodiment of the present application.

[0024] Figure 6 This is a schematic diagram of the assembly between the supporting frame and the rotating ring according to an embodiment of the present application.

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the carrier tube according to an embodiment of the present application.

[0026] Figure 8 This is a three-dimensional schematic diagram of the rotating frame of an embodiment of the present application located in the compacting mechanism.

[0027] Figure 9 This is a three-dimensional schematic diagram of the compacting mechanism of an embodiment of the present application.

[0028] Figure 10 This is a three-dimensional schematic diagram of the rotating frame of an embodiment of the present application located in the detection mechanism.

[0029] Figure 11 This is a three-dimensional schematic diagram of the lifting ring according to an embodiment of the present application.

[0030] Figure 12 This is a three-dimensional schematic diagram of the rotating rack in the transfer mechanism according to an embodiment of the present application.

[0031] Figure 13 for Figure 12 Enlarged schematic diagram of point B.

[0032] Figure 14 This is a schematic diagram of the installation of the driving gear in an embodiment of the present application.

[0033] Explanation of reference numerals: 100—base, 200—carrying mechanism, 300—compacting mechanism, 400—detection mechanism, 500—transfer mechanism, 101—support column, 102—track, 201—support frame, 202—rotating frame, 203—carrying frame, 204—carrying tube, 205—carrying plate, 206—connecting shaft, 207—moving block, 208—driven gear, 209—limiting block, 210—lift rod, 211—first spring, 212—guide rod, 213—positioning rod, 214—bracket, 215—connecting plate, 216—second spring, 217—vibration rod, 218—blocking ring, 219—bump, 220—retaining ring, 221—positioning block, 222—rotating ring, 223—sliding block, 224—sliding rod, 225—connecting block, 226— 6—third spring, 227—connecting rod, 228—bottom plate, 229—support rod, 230—block, 231—convex 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—through rod, 306—support ring, 307—first rotating shaft, 308—base frame, 309—pressure block, 310—chute, 401—weighing module, 402—laser ranging module, 403—lifting ring, 404—push rod, 501—collecting 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—protrusion. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] like Figures 1 to 11As shown, an embodiment of the present application provides a lithium iron phosphate compaction density testing device, including: a base 100, a supporting mechanism 200, a compacting mechanism 300, a detection mechanism 400, and a transfer mechanism 500.

[0036] The compacting mechanism 300, the detecting mechanism 400, and the transferring mechanism 500 are arranged at intervals along the circumferential direction of the base 100; a supporting column 101 which rotates around its own axis is provided at the center of the base 100, and a circular track 102 is provided on the top; the bearing mechanism 200 includes a supporting frame 201 mounted on the supporting column 101, and a plurality of rotating frames 202 which are arranged at equal intervals and rotated radially are provided on the supporting frame 201 along its circumferential direction, and one end of the rotating frame 202 is slidably fitted under the track 102, and a bearing frame 203 with a vertically arranged axis is rotatably installed on the rotating frame 202, and a plurality of bearing tubes 204 which are arranged at intervals along its circumferential direction are provided on the bearing frame 203, and the bearing tubes 204 are arranged at intervals along their circumferential direction. A supporting plate 205 is provided which is movable along its axis and is used to receive lithium iron phosphate; the compacting mechanism 300 includes a plurality of support blocks 301 and a pressing block 302 which are respectively located on the upper and lower sides of the support frame 201 and are movable in the vertical direction. When one of the rotating frames 202 is located above the support block 301, the support block 301 is moved upward and contacts the bottom of the supporting tube 204, providing support for the supporting tube 204 during the compaction process, while the pressing block 302 is moved downward and passed through the supporting tube 204, applying pressure to the lithium iron phosphate powder to compact the lithium iron phosphate powder; the detecting mechanism 400 includes a plurality of weighing modules 401 and 402 which are respectively located on the upper and lower sides of the support frame 201. The laser ranging module 402 and the weighing module 401 are arranged to move in the vertical direction. When one of the rotating frames 202 is located in the detection mechanism 400, the weighing module 401 is moved upward and the supporting tube 204 is lifted up by a predetermined distance to weigh the lithium iron phosphate. The laser ranging module 402 is used to measure the distance between the laser emission point and the surface of the lithium iron phosphate. Since the position of the laser emission point of the laser ranging module 402 is determined, the initial position of the supporting tube 204 and the distance moved upward are determined, then the distance between the laser emission point and the top end of the supporting tube 204 after it moves upward is determined. The distance between the laser emission point and the top end of the supporting tube 204 after it moves upward is determined. The thickness of the lithium iron phosphate powder after compaction can be obtained by adding the depth of the supporting tube 204 and subtracting the distance between the laser emission point and the surface of the lithium iron phosphate powder. The compaction density of the lithium iron phosphate powder can be obtained by calculation. The transfer mechanism 500 includes a plurality of collection tubes 501 arranged below the support frame 201 and movable in the vertical direction. When the lithium iron phosphate powder in the supporting tube 204 needs to be transferred, the rotating frame 202 located in the transfer mechanism 500 is rotated 180 degrees so that the port of the supporting tube 204 faces downward, and the collection tube 501 is aligned with the port of the supporting tube 204, and the supporting plate 205 moves downward, so that the compacted lithium iron phosphate can be pushed into the collection tube 501.

[0037] Specifically, if Figures 1-4 As shown, both ends of the rotating frame 202 are provided with connecting shafts 206, one of which is rotatably mounted on the support frame 201, and the other connecting shaft 206 is rotatably mounted on the moving block 207 and is equipped with a driven gear 208. The moving block 207 is slidably matched with the bottom surface of the track 102. In order to prevent the rotating frame 202 from rotating under the action of its own gravity, the teeth of the driven gear 208 are matched with a limit block 209. A push rod 210 is provided on the outside of the limit block 209, and the push rod 210 is inserted into the moving block 207. A first spring 211 is sleeved on the top rod 210, and the two ends of the first spring 211 are respectively abutted against the moving block 207 and the limit block 209, and are always in a compressed state. Under the action of the first spring 211, the limit block 209 always has a tendency to move toward the driven gear 208, thereby ensuring that the limit block 209 limits the driven gear 208. When the rotating frame 202 needs to be rotated, a force opposite to the elastic force of the first spring 211 is applied to the limit block 209 to release the limit on the driven gear 208.

[0038] Specifically, if Figure 5 As shown, a plurality of arc-shaped guide rods 212 are provided on the top surface of the rotating frame 202 along the circumferential direction, and the carrier 203 is sleeved on the guide rods 212. A plurality of positioning rods 213 are passed through the carrier 203 along the circumferential direction. The lower ends of the positioning rods 213 are passed through the rotating frame 202, and the upper ends of the positioning rods 213 are passed through the bracket 214. The bracket 214 is installed on the carrier 203. The positioning rods 213 are provided with a connecting plate 215 and are sleeved with a second spring 216. The two ends of the second spring 216 are respectively abutted against the bracket 214. and connecting plate 215, and is always in a compressed state. Under the action of the second spring 216, the positioning rod 213 always has a tendency to move toward the rotating frame 202, thereby ensuring the relative fixation between the supporting frame 203 and the rotating frame 202, so that the supporting tube 204 is in a fixed position to facilitate subsequent operations, and by removing the lower end of the positioning rod 213 from the rotating frame 202, the supporting frame 203 can be rotated back and forth, thereby vibrating and settling the lithium iron phosphate powder in the supporting tube 204.

[0039] Specifically, if Figure 2-Figure 3As shown, when the supporting tube 204 needs to be vibrated, a vibration rod 217 is passed through the connecting plate 215 on one of the rotating frames 202, and a retaining ring 218 is provided on the vibration rod 217 for abutting against the bottom surface of the connecting plate 215. The lower end of the vibration rod 217 is mounted on the vibration module. The vibration module is set to reciprocate and vibrate along the circumferential direction of the rotating frame 202 and move in 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 passed through the connecting plate 215, the retaining ring 218 will abut against 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 supporting frame 203 and the rotating frame 202 is released, and the second spring 216 is further compressed. Then, the vibration module is started, such as an electromagnetic vibration device, which uses the attraction and release of the electromagnet to generate periodic vibration, and amplifies the amplitude through the spring to make the vibration rod 217 vibrate back and forth along the circumferential direction of the rotating frame 202, and drive the supporting frame 203 to vibrate back and forth synchronously, so that the lithium iron phosphate powder is settled to facilitate subsequent compaction operations.

[0040] Specifically, if Figure 6 As shown, in order to prevent the supporting tube 204 from falling during the turning process of the rotating frame 202, a plurality of equally spaced protrusions 219 are provided on the outer wall of the supporting frame 203 along the circumferential direction, and the supporting tube 204 is inserted into the protrusions 219. A clamping ring 220 is provided on the outer wall of the supporting tube 204, and the clamping ring 220 abuts against the top surface of the protrusion 219. In addition, a positioning block 221 is matched on the top surface of the clamping ring 220. The positioning block 221 is installed on the rotating ring 222. A plurality of sliders 223 are provided on the inner side of the rotating ring 222 along its circumferential direction. The sliders 223 are sleeved on the slide rods 224. The rod 224 is arc-shaped, and both ends are mounted on the connecting block 225, and the connecting block 225 is mounted on the supporting frame 203. A third spring 226 is sleeved on the sliding rod 224. The two ends of the third spring 226 respectively abut against the slider 223 and the connecting block 225, and are always in a compressed state. The third spring 226 ensures that the supporting tube 204 is limited. When the supporting tube 204 needs to be taken out, it is only necessary to apply a force opposite to the elastic force of the third spring 226 to the rotating ring 222, and move the positioning block 221 from above the retaining ring 220 to remove the supporting tube 204.

[0041] Specifically, if Figure 6-Figure 7As shown, in order to prevent the carrying plate 205 from moving up and down in the carrying tube 204, a connecting rod 227 is provided in the center of the rotating ring 222, and a bottom plate 228 is provided at the lower end of the connecting rod 227. A plurality of spaced support rods 229 are provided on the circumferential side of the bottom plate 228. A clamping block 230 is provided at the end of the support rod 229. A protruding rod 231 is provided on the bottom surface of the carrying plate 205. The protruding rod 231 passes through the carrying tube 204 and is provided with a clamping ring 232 at the end. When the carrying plate 205 needs to be limited, the clamping ring 232 is engaged with the clamping block 230. A fourth spring 233 is sleeved on the connecting rod 227, and the two ends of the fourth spring 233 are respectively abutted against the bottom plate 228 and the rotating ring 222. The fourth spring 233 is used to offset the force exerted by the retaining ring 232 on the bottom plate 228 , thereby ensuring that the supporting plate 205 is always located at the bottom of the supporting tube 204 , and preventing the supporting plate 205 from moving up and down during vibration. After the rotating frame 202 is flipped 180 degrees and the supporting plate 205 is moved toward the mouth of the supporting tube 204 , the supporting plate 205 can be reset under the action of the fourth spring 233 .

[0042] More specifically, Figure 6 As shown, a vertical rod 235 is provided on the bottom surface of the positioning block 221, and the lower end of the vertical rod 235 is passed through the clamping block 230, so that when the rotating ring 222 or the bottom plate 228 rotates, the other can be driven to rotate synchronously to ensure the synchronous rotation of the two.

[0043] Specifically, if Figure 8-Figure 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, and the bottom of the connecting ring 304 is provided with a plurality of through rods 305 along its circumferential direction. The through rods 305 are inserted into the support ring 306. The center of the support ring 306 is installed on the first rotating shaft 307. The first rotating shaft 307 is rotatably installed on the base frame 308 and connected to the output end of the first power device. The first power device is installed on the base frame 308, and the base frame 308 is installed on the base 100, a pressure block 309 is provided on the outside of the base frame 308. The pressure block 309 is annular, and a plurality of spaced inclined grooves 310 are provided on the top surface along its circumferential direction. When the lithium iron phosphate powder in the supporting tube 204 needs to be compacted, the support column 101 is driven to rotate, and one of the rotating frames 202 carrying 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 device, and the support ring 301 is driven to rotate. 06 rotates, and 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 on the top surface of the pressure block 309, the top surface of the support block 301 is flush with the bottom surface of the support tube 204. Then, the support ring 306 is driven to rotate, and the support block 301 will move to the bottom of the support tube 204 and provide support for the support tube 204. Then, when the lithium iron phosphate powder is compacted, Move the pressing block 302 downward and enter the supporting tube 204 to compact the lithium iron phosphate powder. The pressure block 309 and the support block 301 provide further support to the supporting tube 204 during the compaction operation to prevent the rotating frame 202 from deforming under great pressure. For the up and down movement of the pressing block 302, the pressing block 302 can be connected to a pressure seat, and the pressure seat is connected to the moving end of a vertical lifting mechanism, such as the extension end of a hydraulic cylinder.

[0044] Specifically, if Figure 10-11As shown, the weighing module 401 is installed on the lifting ring 403, and 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. The inner side of the lifting ring 403 is provided with a plurality of push rods 404 arranged at intervals along its circumferential direction. The push rod 404 is arc-shaped and includes two vertical sections and a transition section connecting the two vertical sections. When the lithium iron phosphate powder in the supporting tube 204 needs to be weighed, the support column 101 is continued to be driven to rotate so that the rotating frame 202 carrying the compacted lithium iron phosphate powder is located above the weighing module 401, and then the first vertical lifting mechanism is used. The mechanism drives the lifting ring 403 to move upward. At this time, the side surface of the transition section of the push rod 404 will contact the edge of one side of the support rod 229, which will force the bottom plate 228 to rotate. Driven by the vertical rod 235, the rotating ring 222 will also rotate synchronously, thereby moving the positioning block 221 away from above the clamping ring 220 and separating the clamping block 230 from the clamping ring 232. At this time, the third spring 226 is further compressed until the support rod 229 contacts the vertical section of the push rod 404. At this time, the lifting ring 403 continues to move upward until the weighing module 401 lifts the supporting tube 204 and drives the supporting tube 20 4 moves upward a predetermined distance. At this time, the weight of the entire supporting tube 204 plus the compacted lithium iron phosphate powder can be obtained through the weighing module 401. Since the weight of the entire supporting tube 204 is known, it is only necessary to subtract the gravity of the entire supporting tube 204 to obtain the weight of the compacted lithium iron phosphate powder. Subsequently, 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 it and the mouth of the supporting tube 204 is also fixed. Therefore, the laser emission point of the laser ranging module 402 and the supporting tube 204 are 04 after moving upward, plus the distance between the top ends, minus the distance between the laser emission point and the surface of the lithium iron phosphate powder, the thickness of the lithium iron phosphate powder after compaction can be obtained. The volume of the compacted lithium iron phosphate powder can be obtained by multiplying the thickness by the bottom area of ​​the supporting tube 204. The compaction density can be obtained by dividing the mass of the lithium iron phosphate by the volume. Then, the lifting ring 403 can be moved downward to reset, and the rotating ring 222 and the bottom plate 228 will also be 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 can be installed on the track 102.

[0045] Specifically, if Figure 12-14As shown, a pressure rod 502 is provided between the collecting pipes 501 and located above the support frame 201. The upper end of the pressure rod 502 is connected to the rotating rod 503. One end of the rotating rod 503 is sleeved on the transmission shaft 504 and adopts a keyway fit, that is, a keyway is provided on the transmission shaft 504, and a key pin is provided on the inner wall of one end of the rotating rod 503. The key pin slides in the keyway, 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 matched with 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 necessary to take out the compacted lithium iron phosphate powder in the carrying tube 204, the rotating frame 202 carrying the lithium iron phosphate powder with the compacted density tested is moved to the top of the collecting tube 501, and the rotating frame 202 is rotated 180 degrees, and then the collecting tube 501 is removed. The tube 501 moves upward to align with the mouth of the carrier tube 204. Then, the second power device drives the transmission shaft 504 to rotate, so that the pressure rod 502 is located directly above the bottom plate 228. Then, the second vertical lifting mechanism drives the rotating rod 503 to move downward. The lower end of the pressure rod 502 contacts the bottom plate 228 and forces the bottom plate 228 to move downward. The block 230 drives the carrier plate 205 to move toward the mouth of the carrier tube 204, thereby pushing the compacted lithium iron phosphate powder in the carrier tube 204 out and into the collection tube 501. , the fourth spring 233 is also further compressed, and then the pressure 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 pressure rod 502 is rotated and reset around the axis of the transmission shaft 504, and then the rotating frame 202 is rotated back 180 degrees to reset it. As 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.

[0046] Specifically, if Figure 12-14As shown, in order to facilitate the rotation of the rotating frame 202, the transfer mechanism 500 also includes a horizontal frame 507 located on the collection tube 501, and the horizontal frame 507 is connected to the moving end of the horizontal linear mechanism. The horizontal linear mechanism is installed on the base 100, and a second rotating shaft 508 is rotatably installed on the horizontal frame 507. One end of the second rotating shaft 508 is connected to the output end of the third power device, and a driving gear 509 is installed. When used, the driving gear 509 is engaged with the driven gear 208. A protrusion 510 is provided on the outer side of the horizontal frame 507, and the end of the protrusion 510 exceeds the outer side of the driving gear 509 by a predetermined distance, which is used to abut against the limit block 209. The horizontal linear mechanism drives the horizontal frame 507 to move toward the driven gear 208, and the protrusion 510 will abut against the limit block 209, and force the limit The positioning block 209 moves, and when the limiting block 209 has not yet completely disengaged from the driven gear 208, the driving gear 509 meshes with the driven gear 208. When the limiting block 209 is completely disengaged from the driven gear 208, the driving gear 509 is completely meshed with the driven gear 208, and the first spring 211 is further compressed. Subsequently, the second rotating shaft 508 is driven to rotate by the third power device. Under the meshing transmission of the driving gear 509 and the driven gear 208, the rotating frame 202 is rotated. After completing the transfer of the lithium iron phosphate powder, the rotating frame 202 is rotated back and reset, and the cross frame 507 is moved back. The limiting block 209 will be re-engaged with the driven gear 208 under the action of the first spring 211, and the rotating frame 202 is clamped again.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A lithium iron phosphate compaction density testing device, characterized in that: include: A base (100) is provided with a support column (101) that is rotatable at the center, and a circular track (102) is provided on the top; The bearing mechanism (200) comprises a supporting frame (201) mounted on the supporting column (101), a plurality of radially rotating rotating frames (202) are arranged in a circumferential array on the supporting frame (201), one end of the rotating frame (202) is slidably fitted under the track (102), a bearing frame (203) with a vertically arranged axis is rotatably mounted on the rotating frame (202), a plurality of bearing tubes (204) arranged at intervals along the circumferential direction thereof are provided on the bearing frame (203), and a bearing plate (205) is provided in the bearing tube (204) and is arranged movably along the axis thereof for receiving lithium iron phosphate; A compacting mechanism (300), a detection mechanism (400), and a transfer mechanism (500) are arranged at intervals along the circumferential direction of the base (100); The compacting mechanism (300) comprises a plurality of support blocks (301) and a pressing block (302) respectively located on the upper and lower sides of the support frame (201) and arranged to move in the vertical direction. When in use, the support blocks (301) are in contact with the bottom of the support tube (204), and the pressing block (302) is inserted into the support tube (204) to compact the lithium iron phosphate. The detection mechanism (400) comprises a plurality of weighing modules (401) and laser ranging modules (402) respectively arranged on the upper and lower sides of the support frame (201), wherein the weighing modules (401) are arranged to move in a vertical direction and are used to weigh the lithium iron phosphate, and the laser ranging modules (402) are used to measure the thickness of the lithium iron phosphate after compaction; The transfer mechanism (500) comprises a plurality of collecting tubes (501) arranged below the support frame (201) and arranged to move in a vertical direction. When in use, the collecting tubes (501) are aligned with the ports of the supporting tubes (204), and the supporting plate (205) moves downward, so that the compacted lithium iron phosphate enters the collecting tubes (501).

2. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that: Both ends of the rotating frame (202) are provided with connecting shafts (206), one of the connecting shafts (206) is rotatably mounted on the supporting frame (201), and the other connecting shaft (206) is rotatably mounted on the moving block (207), and is provided with a driven gear (208), and the moving block (207) is slidably matched with the bottom surface of the track (102). When in use, the tooth portion of the driven gear (208) is matched with the limiting block (209), and a push rod (210) is provided on the outside of the limiting block (209), and the push rod (210) is inserted into the moving block (207). A first spring (211) is sleeved on the push rod (210), and the two ends of the first spring (211) respectively abut against the moving block (207) and the limiting block (209), and are always in a compressed state.

3. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that: The top surface of the rotating frame (202) is provided with a plurality of arc-shaped guide rods (212) along the circumferential direction, the supporting frame (203) is sleeved on the guide rods (212), and the supporting frame (203) is provided with a plurality of positioning rods (213) along the circumferential direction, the lower ends of the positioning rods (213) are inserted into the rotating frame (202), and the upper ends of the positioning rods (213) are inserted into the bracket (214), and the bracket (214) is installed on the supporting frame (203), and the positioning rods (213) are provided with a connecting plate (215) and sleeved with a second spring (216), and the two ends of the second spring (216) respectively abut against the bracket (214) and the connecting plate (215), and are always in a compressed state.

4. The lithium iron phosphate compaction density testing device according to claim 3, characterized in that: When in use, a vibration rod (217) is passed through the connecting plate (215) on one of the rotating frames (202), and a retaining ring (218) is provided on the vibration rod (217) for contacting the bottom surface of the connecting plate (215). The lower end of the vibration rod (217) is mounted on a vibration module, and the vibration module is configured to reciprocate and vibrate along the circumferential direction of the rotating frame (202) and to move along the vertical direction.

5. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that: The outer wall of the carrier frame (203) is provided with a plurality of equally spaced protrusions (219) along the circumferential direction, the carrier tube (204) is passed through the protrusions (219), and the outer wall of the carrier tube (204) is provided with a snap ring (220), the snap ring (220) abuts against the top surface of the protrusion (219), and when in use, the top surface of the snap ring (220) is matched with a positioning block (221), the positioning block (221) is installed on the rotating ring (222), and the inner side of the rotating ring (222) is provided with a positioning block (221). A plurality of sliders (223) are provided along its circumferential direction. The sliders (223) are sleeved on the slide rod (224). The slide rod (224) is arc-shaped, and both ends are mounted on the connecting block (225). The connecting block (225) is mounted on the supporting frame (203). A third spring (226) is sleeved on the slide rod (224). Both ends of the third spring (226) respectively abut against the slider (223) and the connecting block (225) and are always in a compressed state.

6. The lithium iron phosphate compaction density testing device according to claim 5, characterized in that: A connecting rod (227) is provided through the center of the rotating ring (222), a bottom plate (228) is provided at the lower end of the connecting rod (227), a plurality of spaced support rods (229) are provided on the circumferential side of the bottom plate (228), a clamping block (230) is provided at the end of the support rod (229), a convex rod (231) is provided on the bottom surface of the bearing plate (205), the convex rod (231) passes through the bearing tube (204), and a clamping ring (232) is provided at the end thereof. When in use, the clamping ring (232) fits into the clamping block (230), a fourth spring (233) is sleeved on the connecting rod (227), the two ends of the fourth spring (233) respectively abut against the bottom plate (228) and the rotating ring (222), and are always in a compressed state, a retaining ring (234) is provided at the upper end of the connecting rod (227), and is used to abut against the top surface of the rotating ring (222); A vertical rod (235) is provided on the bottom surface of the positioning block (221), and the lower end of the vertical rod (235) is inserted into the clamping block (230).

7. The lithium iron phosphate compaction density testing device according to claim 1, characterized in that: The bottom of the support block (301) is connected to the support rod (303), and the support rod (303) is installed on the connecting ring (304). The bottom of the connecting ring (304) is provided with a plurality of through rods (305) along its circumferential direction. The through rods (305) are inserted into the support ring (306). The center of the support ring (306) is installed on the first rotating shaft (307). The first rotating shaft (307) is rotatably installed on the base frame (308) and connected to the output end of the first power device. The first power device is installed on the base frame (308). The base frame (308) is installed below the base (100). A pressure block (309) is provided on the outside of the base frame (308). The pressure block (309) is annular, and a plurality of spaced inclined grooves (310) are provided on the top surface along its circumferential direction. When in use, the lower end of the support rod (303) contacts the inclined groove (310).

8. The lithium iron phosphate compaction density testing device according to claim 6, characterized in that: The weighing module (401) is installed on a lifting ring (403), and the lifting ring (403) is connected to the movable end of a first vertical lifting mechanism, and the first vertical lifting mechanism is installed on the base (100). The inner side of the lifting ring (403) is provided with a plurality of push rods (404) arranged at intervals along its circumferential direction. The push rods (404) are arc-shaped and include two vertical sections and a transition section connecting the two vertical sections. When used, the side of the push rod (404) contacts the edge of one side of the support rod (229).

9. The lithium iron phosphate compaction density testing device according to claim 6, characterized in that: A pressure rod (502) is provided between the collecting pipes (501) and is located above the support frame (201). The upper end of the pressure rod (502) is connected to the rotating rod (503). One end of the rotating rod (503) is sleeved on the transmission shaft (504) and is key-matched. The transmission shaft (504) is rotatably mounted 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 matched on the lifting block (506). 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 in use, one of the rotating frames (202) rotates 180 degrees, and the lower end of the pressure rod (502) contacts the bottom plate (228).

10. The lithium iron phosphate compaction density testing device according to claim 2, characterized in that: The transfer mechanism (500) further comprises a horizontal frame (507) located on the collection tube (501), the horizontal frame (507) being connected to the movable end of the horizontal linear mechanism, the horizontal linear mechanism being mounted on the base (100), a second rotating shaft (508) being rotatably mounted on the horizontal frame (507), one end of the second rotating shaft (508) being connected to the output end of the third power device, and a driving gear (509) being mounted thereon, and when in use, the driving gear (509) being engaged with the driven gear (208), a protrusion (510) being provided on the outer side of the horizontal frame (507), an end of the protrusion (510) being beyond the outer side surface of the driving gear (509) by a predetermined distance, and being used to abut against the limit block (209).

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