Lithium battery test structure

Abstract

The invention discloses a lithium battery test structure, and relates to the technical field of lithium battery detection, and the lithium battery test structure comprises a fixed seat, the rear side of the fixed seat is fixedly provided with a supporting seat, the top end of the fixed seat is fixedly connected with a fixed disc, the fixed disc is internally provided with a limiting groove, and the bottom of the center of the fixed disc is fixedly provided with a servo motor. According to the full-process automatic testing device, through cooperative cooperation of the fixing base, the fixing disc, the transferring disc, the automatic pushing mechanism, the driven opening and closing mechanism, the telescopic detection mechanism and the linkage opening and closing mechanism, a full-process automatic testing system of batch feeding, automatic dust removal, linkage testing and intelligent sorting is formed; the core problems that a traditional testing tool is low in batch testing efficiency, insufficient in automation degree and poor in using effect, and the testing effect is affected due to insufficient contact of top contacts of cylindrical lithium batteries caused by dust and chippings are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of lithium battery testing technology, specifically a testing structure for lithium batteries. Background Technology

[0002] Lithium-ion batteries are a type of rechargeable battery that uses lithium ions as charge carriers and stores and releases energy by inserting or de-intercalating lithium ions between the positive and negative electrodes. Their core technological feature lies in utilizing the reversible migration of lithium ions to complete electrochemical reactions, which is different from traditional lead-acid batteries, nickel-metal hydride batteries and other energy storage systems that rely on the oxidation and reduction of metal ions. As a core component in the new energy field, the performance and safety testing of lithium batteries is a key link to ensure product reliability. Therefore, charge and discharge tests are required during the production of lithium batteries to ensure the yield rate of lithium batteries.

[0003] However, the existing testing structure for lithium batteries still has certain shortcomings in use; As proposed in application number CN202310680824.7, a fixture and method for charging and discharging cylindrical lithium batteries includes a frame; a positioning part disposed on the frame and used to define the position of the cylindrical lithium battery; a lifting mechanism disposed on the frame; and a testing assembly, in which a probe assembly is disposed on the lifting mechanism and abuts against the top of the cylindrical lithium battery for detecting the state of the cylindrical lithium battery during charging and discharging. The cylindrical lithium battery is disposed within the positioning part, and the testing assembly moves toward or away from the cylindrical lithium battery by being driven by the lifting mechanism. The testing assembly includes a positive electrode probe assembly disposed on a fixed plate; and a negative electrode probe assembly disposed on the fixed plate and arranged around the positive electrode probe assembly. This solution solves the problem that the prior art cannot effectively simulate the actual use of cylindrical lithium batteries. However, in actual use, the following problems still exist: 1. During the charging and discharging test of lithium batteries, this charging and discharging test fixture can only test one group of lithium batteries at a time. After the test, the disassembly and replacement of lithium batteries must be done manually. As a result, when testing lithium batteries in batches, there are problems with low testing efficiency and low automation efficiency, which reduces the effectiveness of use. 2. When testing cylindrical lithium batteries using this charge-discharge test fixture, dust and debris easily accumulate at the top contacts of the lithium battery during the production process. As a result, these dust and debris can lead to insufficient contact during testing, thus affecting the test results of the lithium battery.

[0004] In view of this, in-depth research was conducted on the above issues, which led to the creation of this case.

[0005] To address the aforementioned issues, an innovative design was implemented based on the existing lithium battery testing structure. Summary of the Invention

[0006] The purpose of this invention is to provide a testing structure for lithium batteries to solve the problems mentioned in the background art, which lead to low efficiency in batch testing and automation, reduced performance, and the fact that when testing cylindrical lithium batteries, dust and debris easily stick to the top contacts during production, resulting in insufficient contact and thus affecting the testing results.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a test structure for a lithium battery, including a fixed base, a support base fixedly installed on the rear side of the fixed base, a fixed disk fixedly connected to the top of the fixed base, a limit groove opened inside the fixed disk, a servo motor fixedly installed at the bottom center of the fixed disk, the shaft end of the servo motor being rotatably connected to the center line of the fixed disk, and a transfer disk fixedly connected to the top of the shaft end of the servo motor. The rear end of the limiting groove is provided with a feeding port, and an automatic pushing mechanism is connected to the rear side of the feeding port. The front end of the automatic feeding mechanism is connected to a driven opening and closing mechanism; A telescopic detection mechanism is installed on the right side of the fixed plate; The bottom front side of the limiting groove is provided with a qualified discharge port, and a linkage opening and closing mechanism is installed inside the qualified discharge port. The bottom left side of the limiting groove has a defective product discharge port.

[0008] Preferably, the automatic feeding mechanism includes a support seat fixedly installed on the rear side of the fixed plate. The bottom surface of the support seat is fixedly connected to the top surface of the support base. The outlet of the support seat corresponds to the inlet. Slide grooves are opened inside both sides of the support seat. Push plates are slidably installed inside the slide grooves. Movable seats are fixedly installed at the top of both ends of the push plates. A positioning rod passes through the interior of the movable seat. The movable seat is slidably connected to the positioning rod. Positioning seats are fixedly connected to both ends of the positioning rod. The positioning seats are fixedly connected to the support seat.

[0009] Preferably, the automatic feeding mechanism further includes a telescopic spring sleeved on the outer ring of the positioning rod between the front positioning seat and the movable seat. The two ends of the telescopic spring are fixedly connected to the front positioning seat and the movable seat respectively, and the movable seat forms a telescopic structure with the positioning seat through the telescopic spring.

[0010] Using the above technical solution, the support can accommodate cylindrical lithium batteries to be tested in batches, solving the limitation that traditional tooling can only place one set of batteries at a time. Under the elastic force of the telescopic spring, the push plate slides stably along the positioning rod guide, which can automatically push the lithium batteries in the support to the feed port one by one, effectively improving the efficiency of traditional loading and unloading operations. The cooperation between the positioning rod and the positioning seat ensures accurate pushing path, avoids battery deviation, realizes automated batch loading of batteries to be tested, lays the foundation for subsequent batch testing, significantly improves loading efficiency before testing, and alleviates the problem of low batch testing efficiency caused by traditional tooling.

[0011] Preferably, the driven opening and closing mechanism includes an opening and closing plate one and an opening and closing plate two that slide against the outlet end of the support seat. A connecting plate is fixedly installed on the bottom rear side of both the opening and closing plate one and the opening and closing plate two. A limiting post is symmetrically passed through the inside of the connecting plate. The inner end of the limiting post is fixedly connected to the support seat. A stop block is fixedly installed on the outer end of the limiting post. A return spring one is sleeved on the outer ring of the limiting post between the stop block and the connecting plate. The connecting plate, the limiting post and the stop block form a limiting telescopic structure through the return spring one.

[0012] Preferably, the driven opening and closing mechanism further includes a top plate fixedly installed at the top of the opening and closing plate one, a toothed plate fixedly installed at the top of the opening and closing plate two, a rack one fixedly installed on the top surface of the top plate, a rack two fixedly installed on the top surface of the toothed plate, a gear set meshing between the rack two and the rack one, a support frame rotatably sleeved at the top of the gear set, and the bottom end of the support frame fixedly connected to the support seat.

[0013] Preferably, the driven opening and closing mechanism further includes a rotating cylinder fixedly installed on the top surface of the transfer disk. The outer ring of the rotating cylinder is equipped with a drive gear set at equal angles. The drive gear set is intermittently meshed with the tooth plate. A cleaning sponge is bonded to the bottom surface of the top plate and the tooth plate.

[0014] Using the above technical solution, when the transfer disk rotates, it drives the drive gear set of the outer ring of the rotating cylinder to intermittently mesh with the tooth plate. Through the meshing transmission of the gear set, it can synchronously drive the opening and closing plate one and the opening and closing plate two to slide in the opposite direction along the limiting column, realize the automatic opening and closing between the support outlet and the feed port, and accurately control the rhythm of the battery entering the limiting groove. No additional power source is required. It only relies on the rotation power of the transfer disk to improve the automation integration of the structure. During the opening and closing process, the cleaning sponges on the bottom surfaces of the opening and closing plates 1 and 2 can directly adhere to the top contacts of the cylindrical lithium battery, automatically wiping away dust and debris that adheres during production. This completely solves the problem of insufficient contact caused by foreign objects at the contacts in traditional testing, ensuring the stability of electrode contact during subsequent testing and improving the accuracy of test data. At the same time, the reset spring 1 can drive the opening and closing plates to automatically reset, ensuring that the opening and closing mechanism closes stably after each feeding and preventing the battery from falling off prematurely.

[0015] Preferably, the telescopic detection mechanism includes a mounting plate fixedly installed on the bottom right side of the fixed plate. A lower contact member is fitted inside the mounting plate, and the contact end of the lower contact member is fitted through and connected to the right side of the fixed plate. A limit post is fixedly installed on the top surface of the outer end of the mounting plate. An inner groove is opened inside the limit post, and a lifting rod is slidably arranged inside the inner groove. A lifting seat is fixedly installed at the top of the lifting rod. A second return spring is sleeved on the outer ring of the lifting rod between the lifting seat and the limit post. The upper and lower ends of the second return spring are fixedly connected to the lifting seat and the limit post, respectively. An upper contact member is fitted inside the lifting seat. A detection controller is installed at the connection end of the upper and lower contact members. The bottom of the detection controller is fixedly connected to the mounting plate.

[0016] Preferably, the telescopic detection mechanism further includes a connecting seat fixedly installed at the left end of the lifting seat, a roller is rotatably installed at the bottom end of the connecting seat, a drive seat is fixedly installed on the top surface of the transfer plate, the drive seat is in close contact with the roller, and the drive seat has grooves formed at equal angles inside.

[0017] Using the above technical solution, the rotation of the transfer disk drives the drive seat to rotate synchronously. When the groove on the top of the drive seat intermittently contacts the roller, under the elastic reset action of the second reset spring, the lifting seat can be driven to automatically rise and fall along the inner groove of the limit post, thereby driving the upper contact and the lower contact to precisely clamp or release the lithium battery in the limit groove. The upper and lower contacts, in conjunction with the detection controller, enable real-time acquisition of lithium battery charge and discharge test data. This eliminates the need for manual adjustment of electrode contact positions, automating the testing process. The elastic force of the second reset spring ensures stable contact pressure between the upper contact and the battery top contact, preventing contact damage caused by rigid contact. Furthermore, the dust-cleaning effect of the driven opening and closing mechanism further guarantees contact reliability, resolving the issue of unstable contact affecting test results in traditional testing. The detection action is also linked to the rotation of the transfer disk, improving the testing efficiency of a single battery group and adapting to batch testing needs.

[0018] Preferably, the linkage opening and closing mechanism includes limiting grooves on both sides of the qualified discharge port, a slide bar is slidably installed inside the limiting groove, and an opening and closing block is fixedly connected to the inner side of the slide bar.

[0019] Preferably, the linkage opening and closing mechanism further includes a support plate fixedly installed on the bottom surface of the front end of the fixed plate. An electric push rod is fixedly installed on the top surface of the support plate. The output end of the electric push rod is fixedly connected to the opening and closing block. The electric push rod drives the opening and closing block to open and close the qualified discharge port. The electric push rod is connected to the detection controller through a wiring harness.

[0020] Using the above technical solution, the detection controller can automatically determine whether the lithium battery is qualified based on the test data. If it is qualified, the electric push rod is extended and retracted through the wiring harness, which drives the opening and closing block to slide along the limiting groove, thereby realizing the automatic opening of the qualified discharge port and the qualified battery is discharged along the discharge port. If it is unqualified, the qualified discharge port remains closed, and the battery continues to rotate with the transfer tray to the defective discharge port for discharge. There is no need for manual sorting of qualified and defective batteries, realizing the automated classification of batteries after testing. The linkage control between the electric push rod and the detection controller avoids the errors and time-consuming process of manual sorting, further improving the overall efficiency of batch testing. At the same time, the pallet provides stable support for the electric push rod, ensuring the precise movement of the opening and closing blocks and guaranteeing the stability of the sorting process. This solves the problems of traditional tooling requiring manual differentiation of qualified and defective products and low automation efficiency.

[0021] Compared with existing technologies, the beneficial effects of this invention are as follows: The lithium battery testing structure, through the coordinated operation of a fixed base, fixed disk, transfer disk, automatic feeding mechanism, driven opening and closing mechanism, telescopic detection mechanism, and linkage opening and closing mechanism, forms a fully automated testing system of "batch feeding - automatic dust removal - linkage testing - intelligent sorting". This effectively solves the core problems of low efficiency, insufficient automation, and poor performance in batch testing of traditional testing fixtures, as well as insufficient contact at the top contacts of cylindrical lithium batteries due to dust and debris, which affects the testing results. The overall structure eliminates the need for manual battery loading and unloading, position adjustment, and sorting of qualified and defective products, significantly improving the efficiency and accuracy of lithium battery testing. At the same time, the design of elastic contact and automatic dust removal ensures the stability of the testing process, adapting to the batch production testing needs of cylindrical lithium batteries, as detailed below: 1. The automatic feeding mechanism realizes the batch acceptance of cylindrical lithium batteries to be tested through the support seat, breaking through the limitation of traditional tooling that can only accommodate one group at a time; with the help of the telescopic spring, the push plate slides along the positioning rod, automatically pushing the batteries one by one to the feeding port, replacing manual loading and unloading. The positioning rod and positioning seat ensure accurate pushing and avoid deviation failure, realizing automated batch feeding, improving efficiency from the beginning of the testing process, and laying the foundation for batch testing. 2. The driven opening and closing mechanism does not require an additional power source. It drives the drive gear set to mesh with the gear plate through the transfer plate, and realizes the automatic opening and closing of the opening and closing plate through the gear set transmission. It can accurately control the battery feeding rhythm, improve the degree of automation integration, and the cleaning sponge on the bottom of the opening and closing plate can automatically wipe away the dust and debris on the top contact of the battery, solve the problem of insufficient contact in the traditional way, and ensure the accuracy of testing. The reset spring can drive the opening and closing plate to automatically reset, prevent the battery from falling off prematurely, and improve the stability of feeding. 3. The telescopic testing mechanism drives the drive seat to rotate through the transfer plate, and in conjunction with the second reset spring, drives the lifting seat to automatically lift and lower, so as to accurately clamp or release the battery between the upper and lower contact parts. No manual adjustment of the electrode position is required, and automated test data acquisition is completed. The second reset spring ensures stable contact pressure and avoids contact damage. In addition, the dust removal effect enhances contact reliability. The testing action is linked with the transfer plate, which improves the efficiency of single-group testing and adapts to the batch production pace. 4. The linkage opening and closing mechanism automatically controls the electric push rod to slide the opening and closing block according to the test data through the detection controller, so that qualified batteries are discharged from the qualified discharge port and unqualified batteries are discharged from the defective discharge port. No manual sorting is required, avoiding errors and time consumption. The automated sorting forms a closed loop with the previous process, shortens the batch testing cycle, and solves the problem of low efficiency in traditional automation. Attached Figure Description

[0022] Figure 1 This is a side view of the external structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the distribution structure of the transfer disk and the fixed disk of the present invention;

[0024] Figure 3 This is a schematic diagram showing the distribution structure of the automatic feeding mechanism, the driven opening and closing mechanism, and the transfer tray of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection structure between the automatic feeding mechanism and the driven opening and closing mechanism of the present invention;

[0026] Figure 5 This is a side view of the automatic feeding mechanism of the present invention.

[0027] Figure 6 This is a side view of the driven opening and closing mechanism of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection structure of rack one, rack two, and gear set of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection structure between the fixed disk and the telescopic detection mechanism of the present invention;

[0030] Figure 9 This is a side sectional view of the telescopic detection mechanism of the present invention;

[0031] Figure 10 This is a schematic diagram of the linkage structure between the telescopic detection mechanism and the transfer disk of the present invention;

[0032] Figure 11 This is a schematic diagram of the connection structure between the fixed disk and the linkage opening and closing mechanism of the present invention.

[0033] In the diagram: 1. Fixed base; 2. Support base; 3. Fixed plate; 4. Limiting groove; 5. Servo motor; 6. Transfer plate; 7. Feed inlet; 8. Support base; 9. Slide groove; 10. Push plate; 11. Movable base; 12. Positioning rod; 13. Positioning seat; 14. Telescopic spring; 15. Opening / closing plate one; 16. Opening / closing plate two; 17. Connecting plate; 18. Limiting column; 19. Stop block; 20. Return spring one; 21. Top plate; 22. Gear plate; 23. Rack one; 24. Rack two; 25. Gear set 26. Support frame; 27. Rotating cylinder; 28. Drive gear assembly; 29. ​​Cleaning sponge; 30. Mounting plate; 31. Lower contact element; 32. Limiting post; 33. Inner groove; 34. Lifting rod; 35. Lifting seat; 36. Second return spring; 37. Upper contact element; 38. Detection controller; 39. Connecting seat; 40. Roller; 41. Drive seat; 42. Qualified discharge port; 43. Limiting groove; 44. Sliding bar; 45. Opening and closing block; 46. Support plate; 47. Electric push rod; 48. Defective product discharge port. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-11 The present invention provides a technical solution: a test structure for a lithium battery, including a fixed base 1, a support base 2 fixedly installed on the rear side of the fixed base 1, a fixed plate 3 fixedly connected to the top of the fixed base 1, a limit groove 4 opened inside the fixed plate 3, a servo motor 5 fixedly installed at the bottom center of the fixed plate 3, the shaft end of the servo motor 5 being rotatably connected to the center line of the fixed plate 3, and a transfer plate 6 fixedly connected to the top of the shaft end of the servo motor 5. In the above structure design, the fixed base 1 serves as the load-bearing foundation of the entire test structure. The fixed plate 3, which is fixedly connected at the top, provides a stable installation platform for the subsequent limiting groove 4 and various functional mechanisms. The support base 2 fixed at the rear further strengthens the support strength of the automatic pushing mechanism, preventing deformation of the automatic pushing mechanism due to the weight of the battery and the mechanism, and ensuring that the overall structure remains stable during the test. The limiting groove 4 opened inside the fixed plate 3 has a groove size that is adapted to the cylindrical lithium battery to be tested. It can perform circumferential and radial positioning of the lithium battery entering the groove, preventing the battery from shifting or tipping over during the transfer process, and laying the foundation for precise docking of each link. When the servo motor 5 starts, it drives the transfer disk 6 at the shaft end to rotate along the center line of the fixed disk 3. During the rotation, the transfer disk 6 will be linked with the lithium battery in the limiting groove 4. Through the rotational thrust of the transfer disk 6, the battery to be tested that enters the limiting groove 4 from the feeding port 7 will be gradually transferred to the test station corresponding to the telescopic detection mechanism. After the test is completed, it will continue to be transferred to the sorting station corresponding to the qualified discharge port 42 or the defective discharge port 48. This realizes the automated and orderly transfer of lithium batteries between the "feeding-testing-sorting" links, providing power and path support for the whole process of batch testing.

[0036] The rear end of the limiting groove 4 is provided with a feed port 7. An automatic pushing mechanism is connected to the rear side of the feed port 7. The automatic pushing mechanism includes a support seat 8 fixedly installed on the rear side of the fixed plate 3. The bottom surface of the support seat 8 is fixedly connected to the top of the support seat 2. The outlet of the support seat 8 corresponds to the feed port 7. Slide grooves 9 are provided inside both sides of the support seat 8. Push plates 10 are slidably installed inside the slide grooves 9. Movable seats 11 are fixedly installed at the top of both ends of the push plates 10. A positioning rod 12 passes through the inside of the movable seat 11. The movable seat 11 and the positioning rod 12 are slidably connected. Positioning seats 13 are fixedly connected to both ends of the positioning rod 12. The positioning seats 13 are fixedly connected to the support seat 8. The automatic pushing mechanism also includes a telescopic spring 14 sleeved on the outer ring of the positioning rod 12 between the front positioning seat 13 and the movable seat 11. The two ends of the telescopic spring 14 are fixedly connected to the front positioning seat 13 and the movable seat 11 respectively. The movable seat 11 and the positioning seat 13 form a telescopic structure through the telescopic spring 14. The above structure is designed so that the feed port 7 at the rear end of the limiting groove 4 serves as the connecting channel between the support 8 and the limiting groove 4. Its opening size is adapted to the outlet of the support 8 and the diameter of the cylindrical lithium battery to be tested, thus creating a straight path for the battery to transition from the storage stage to the transfer stage, avoiding jamming or deviation during battery transportation. The automatic pushing mechanism connected to the rear of the feed port 7 achieves automated batch transportation of the batteries to be tested through the cooperation of various components. The support 8 has an internal accommodating space adapted to the lithium battery, which can store multiple sets of batteries to be tested at one time, breaking through the limitation of traditional tooling to store one set at a time. Moreover, the outlet of the support 8 is precisely aligned with the feed port 7, ensuring that the battery pushing direction is consistent with the inlet of the limiting groove 4. The sliding grooves 9 inside both sides of the support seat 8 provide a front-to-back sliding track for the push plate 10, restricting the push plate 10 to move only in the conveying direction. At the same time, the movable seats 11 at the top of both ends of the push plate 10 pass through the positioning rod 12 and slide with it. The positioning rod 12 is fixed to the support seat 8 through the positioning seats 13 at both ends, forming a double guide structure to ensure that the push plate 10 always slides stably. The telescopic spring 14 is the core power source for automatic feeding. In the initial state, multiple sets of lithium batteries to be tested are placed into the support seat 8 by manual or automated equipment. The lithium batteries exert a backward squeezing force on the push plate 10, which drives the movable seat 11 to slide backward along the positioning rod 12 and compress the telescopic spring 14, allowing the telescopic spring 14 to store elastic potential energy. When the transfer plate 6 transfers the previous set of batteries in the limiting groove 4 to the subsequent station and the feed port 7 is in the waiting state, the telescopic spring 14 releases its elastic potential energy, pushing the movable seat 11 to reset forward along the positioning rod 12, which in turn drives the push plate 10 to slide forward along the slide groove 9, accurately pushing the frontmost set of batteries in the support seat 8 into the feed port 7 and into the limiting groove 4. As subsequent batteries are continuously added to the support seat 8, the automated and continuous batch feeding of lithium batteries to be tested is realized without manual intervention in the feeding process, providing front-end material feeding guarantee for the fully automated batch testing of the test structure.

[0037] The front end of the automatic feeding mechanism is connected to a driven opening and closing mechanism. The driven opening and closing mechanism includes an opening and closing plate 15 and an opening and closing plate 16 that slide against the outlet end of the support 8. A connecting plate 17 is fixedly installed on the rear bottom side of both the opening and closing plate 15 and the opening and closing plate 16. A limiting post 18 symmetrically runs through the interior of the connecting plate 17. The inner end of the limiting post 18 is fixedly connected to the support 8, and a stop block 19 is fixedly installed on the outer end of the limiting post 18. A return spring 20 is sleeved around the outer ring of the limiting post 18 between the stop block 19 and the connecting plate 17. The connecting plate 17, through the return spring 20, forms a limiting and telescopic structure with the limiting post 18 and the stop block 19. The driven opening and closing mechanism also includes a connecting plate 16 fixedly installed on the outlet end of the support 8. The top plate 21 at the top of the first plate 15 and the top of the second plate 16 are fixedly mounted with a toothed plate 22. The top surface of the top plate 21 is fixedly mounted with a rack 23, and the top surface of the toothed plate 22 is fixedly mounted with a rack 24. A gear set 25 is meshed between the rack 24 and the rack 23. A support frame 26 is rotatably sleeved at the top of the gear set 25. The bottom end of the support frame 26 is fixedly connected to the support seat 8. The driven opening and closing mechanism also includes a rotating cylinder 27 fixedly mounted on the top surface of the transfer plate 6. A drive gear set 28 is installed at equal angles on the outer ring of the rotating cylinder 27. The drive gear set 28 is intermittently meshed with the toothed plate 22. A cleaning sponge 29 is bonded to the bottom surface of the top plate 21 and the toothed plate 22. In the above structural design, opening and closing plate 15 and opening and closing plate 16 slide against the outlet end of the support 8. The connecting plates 17 on the rear bottom sides of both plates penetrate the limiting post 18. The inner end of the limiting post 18 is fixed to the support 8, and the outer end is limited by the stop block 19. The return spring 20 between the stop block 19 and the connecting plate 17 is sleeved on the outer ring of the limiting post 18, forming the basic structure for guiding the limiting post 18 and resetting the return spring 20. This not only restricts the opening and closing plates 15 and 16 to slide only in the left and right directions, but also... The reset after opening provides power, and the top plate 21 at the top of the opening and closing plate 15 and the toothed plate 22 at the top of the opening and closing plate 26 respectively mesh with the gear set 25 through the rack 1 23 and rack 2 24 on the top surface. The gear set 25 is fixed to the support seat 8 through the support frame 26 at the top. The stable support of the support frame 26 ensures the stable transmission of the gear set 25, forming a synchronous reverse transmission structure. When the toothed plate 22 moves, the opening and closing plate 15 and the opening and closing plate 26 can slide synchronously in opposite directions through the synchronous reverse transmission structure. The drive gear assembly 28, which is installed at equal angles on the outer ring of the rotating cylinder 27, rotates synchronously with the transfer disk 6. When the drive gear assembly 28 rotates to the meshing position with the tooth plate 22, it will drive the tooth plate 22 to slide outward along the limiting post 18. During the sliding process, the tooth plate 22 drives the gear assembly 25 to rotate through the rack 24. The gear assembly 25 then drives the top plate 21 and the opening and closing plate 15 to slide inward along the limiting post 18 through the rack 23. At this time, the opening and closing plate 15 and the opening and closing plate 26 separate in opposite directions, and the outlet of the support seat 8 is opened. At the same time, the connecting plate 17 slides with the opening and closing plate to compress the return spring 20, so that the return spring 20 stores elastic potential energy. During this opening and closing process, the cleaning sponge 29 that is attached to the bottom surface of the top plate 21 and the tooth plate 22 will slide with the opening and closing plate 15 and the opening and closing plate 26 to wipe away the dust and debris on the contact surface. As the transfer disk 6 continues to rotate, after the drive gear assembly 28 disengages from the gear plate 22, the return spring 1 20 releases its elastic potential energy, pushing the connecting plate 17 to reset along the limiting post 18, thereby causing the opening and closing plate 2 16 and the opening and closing plate 1 15 to re-fit and close the outlet of the support seat 8, preventing the subsequent battery from falling off prematurely.

[0038] A telescopic detection mechanism is installed on the right side of the fixed plate 3. The telescopic detection mechanism includes a mounting plate 30 fixedly installed on the bottom right side of the fixed plate 3. A lower contact member 31 is fitted inside the mounting plate 30. The contact end of the lower contact member 31 is connected to the right side of the fixed plate 3 through it. A limit post 32 is fixedly installed on the top surface of the outer end of the mounting plate 30. An inner groove 33 is opened inside the limit post 32. A lifting rod 34 is slidably arranged inside the inner groove 33. A lifting seat 35 is fixedly installed at the top of the lifting rod 34. A return spring 36 is sleeved on the outer ring of the lifting rod 34 between the lifting seat 35 and the limit post 32. The upper and lower ends of the reset spring 36 are fixedly connected to the lifting seat 35 and the limiting post 32, respectively. The upper contact 37 is fitted inside the lifting seat 35. The connection end of the upper contact 37 and the lower contact 31 is equipped with a detection controller 38. The bottom of the detection controller 38 is fixedly connected to the mounting plate 30. The telescopic detection mechanism also includes a connecting seat 39 fixedly installed on the left end of the lifting seat 35. The bottom end of the connecting seat 39 is rotatably installed with a roller 40. The top surface of the transfer plate 6 is fixedly installed with a drive seat 41. The drive seat 41 is in close contact with the roller 40. The drive seat 41 has grooves opened at equal angles inside. The above-described structure is designed such that when the drive seat 41 rotates synchronously with the transfer disk 6, its top surface remains in contact with the roller 40 at the bottom of the connecting seat 39. As the transfer disk 6 gradually aligns the lithium battery to be tested with the lower contact 31, the protruding part on the top of the drive seat 41 rotates synchronously to the position of contact with the roller 40. Through the upward pushing force of the protruding part on the roller 40, the connecting seat 39 and the lifting seat 35 slide upward along the inner groove 33 of the limiting post 32. At this time, the lifting rod 34 rises synchronously with the lifting seat 35, the second return spring 36 is compressed and stores elastic potential energy, and the upper contact 37 rises away from the lower contact 31 with the lifting seat 35, leaving space for the lithium battery to enter the testing station. When the lithium battery is fully in contact with the lower contact 31, the groove on the top surface of the drive seat 41 rotates to the position corresponding to the roller 40. At this time, the pushing force of the drive seat 41 on the roller 40 disappears, the second reset spring 36 releases elastic potential energy, and pushes the lifting seat 35 to reset downward along the inner groove 33. The lifting rod 34 then slides down until the upper contact 37 is precisely pressed onto the top electrode of the lithium battery, and together with the lower contact 31, clamps the positive and negative electrodes of the lithium battery. At this time, the detection controller 38 connected to the connection end of the upper contact 37 and the lower contact 31 immediately starts the charge and discharge test program, and collects the core parameters of the lithium battery such as voltage and current in real time to complete the automated test data collection. After the test is completed, the transfer tray 6 continues to drive the drive seat 41 to rotate. The next protrusion on the top surface of the drive seat 41 contacts the roller 40 again, repeating the above-mentioned action of "pushing the lifting seat 35 to rise and the upper contact 37 to disengage", releasing the tested lithium battery so that the transfer tray 6 can transport it to the subsequent sorting station. At the same time, the reset spring 36 is compressed again, preparing for the downward contact after the next group of lithium batteries enters the test station.

[0039] The bottom front side of the limiting groove 4 is provided with a qualified discharge port 42. The qualified discharge port 42 is equipped with a linkage opening and closing mechanism. The linkage opening and closing mechanism includes limiting grooves 43 on both sides of the qualified discharge port 42. A slide bar 44 is slidably installed inside the limiting groove 43. An opening and closing block 45 is fixedly connected to the inner side of the slide bar 44. The linkage opening and closing mechanism also includes a support plate 46 fixedly installed on the bottom front side of the fixed plate 3. An electric push rod 47 is fixedly installed on the top surface of the support plate 46. The output end of the electric push rod 47 is fixedly connected to the opening and closing block 45. The electric push rod 47 drives the opening and closing block 45 to open and close the qualified discharge port 42. The electric push rod 47 is connected to the detection controller 38 through a wire harness. The bottom left side of the limiting groove 4 is provided with a defective product discharge port 48. In the above-described structure, when the transfer tray 6 rotates the tested lithium battery from the testing station to the limiting groove 4 corresponding to the qualified discharge port 42, the detection controller 38 has already completed the analysis and qualification judgment of the battery test data. If the battery is determined to be qualified, the detection controller 38 immediately sends an "open" signal to the electric push rod 47 through the wiring harness. After receiving the signal, the electric push rod 47 starts to extend and retract, pushing the opening and closing block 45 to drive the slide bar 44 to slide outward along the limiting groove 43. At this time, the qualified discharge port 42 is opened, and the qualified lithium battery slides down the qualified discharge port 42 to the preset qualified material collection area under its own gravity. After the qualified battery is discharged, the detection controller 38 sends a "close" signal, and the electric push rod 47 extends and retracts in the opposite direction, driving the opening and closing block 45 to reset and close the qualified discharge port 42 to prevent subsequent batteries from being discharged erroneously. If the detection controller 38 determines that the battery is defective, it will not send an "open" signal to the electric push rod 47. The electric push rod 47 remains stationary, and the opening and closing block 45 always closes the qualified discharge port 42. At this time, the transfer disk 6 continues to drive the defective battery to rotate along the limiting groove 4. When it rotates to the position of the defective discharge port 48 at the bottom left, since the defective discharge port 48 has no closing mechanism and is always in an open state, the defective battery slides directly along the defective discharge port 48 to the preset defective material collection area under the action of gravity, thus completing the automatic sorting of defective batteries.

[0040] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A test structure of a lithium battery, comprising a fixing seat (1), a supporting seat (2) is fixedly installed on the back side of the fixing seat (1), characterized in that: The top end of the fixing seat (1) is fixedly connected with a fixing disc (3), a limiting groove (4) is arranged in the fixing disc (3), a servo motor (5) is fixedly installed at the center bottom of the fixing disc (3), the shaft end of the servo motor (5) is rotatably connected with the center line of the fixing disc (3), and a transfer disc (6) is fixedly connected to the top end of the shaft of the servo motor (5); A feeding port (7) is arranged at the rear end of the limiting groove (4), and an automatic pushing mechanism is connected to the rear side of the feeding port (7); The front end of the automatic pushing mechanism is connected with a driven opening and closing mechanism; The right side of the fixing disc (3) is provided with an extension detection mechanism; The front side bottom of the limiting groove (4) is provided with a qualified discharge port (42), and a linkage opening and closing mechanism is installed in the inside of the qualified discharge port (42); The left side bottom of the limiting groove (4) is provided with a substandard discharge port (48).

2. The test structure of claim 1, wherein: The automatic pushing mechanism comprises a supporting seat (8) fixedly installed on the rear side of the fixing disc (3), the bottom surface of the supporting seat (8) is fixedly connected with the top end of the supporting seat (2), the outlet of the supporting seat (8) corresponds to the feeding port (7), sliding grooves (9) are arranged in the inside of the both sides of the supporting seat (8), a pushing plate (10) is slidably installed in the inside of the sliding groove (9), movable seats (11) are fixedly installed at the top of both ends of the pushing plate (10), positioning rods (12) penetrate through the inside of the movable seats (11), the movable seats (11) are slidably connected with the positioning rods (12), positioning seats (13) are fixedly connected with both ends of the positioning rods (12), and the positioning seats (13) are fixedly connected with the supporting seat (8).

3. The test structure of claim 2, wherein: The automatic pushing mechanism further comprises a telescopic spring (14) sleeved on the outer circle of the positioning rod (12) between the front end positioning seat (13) and the movable seat (11), both ends of the telescopic spring (14) are fixedly connected with the front end positioning seat (13) and the movable seat (11) respectively, and the movable seat (11) and the positioning seat (13) constitute a telescopic structure through the telescopic spring (14).

4. The test structure of claim 2, wherein: The driven opening and closing mechanism comprises opening and closing plates one (15) and two (16) which are slidably attached to the outlet end of the supporting seat (8), connecting plates (17) are fixedly installed at the bottom rear side of the opening and closing plates one (15) and two (16), limiting columns (18) are symmetrically penetrated in the inside of the connecting plates (17), the inner ends of the limiting columns (18) are fixedly connected with the supporting seat (8), the outer ends of the limiting columns (18) are fixedly installed with stop blocks (19), reset springs one (20) are sleeved on the outer circle of the limiting columns (18) between the stop blocks (19) and the connecting plates (17), and the connecting plates (17) constitute a limiting telescopic structure with the limiting columns (18) and the stop blocks (19) through the reset springs one (20).

5. The test structure of claim 4, wherein: The driven opening and closing mechanism further comprises a top plate (21) fixedly installed at the top end of the first opening and closing plate (15), a tooth plate (22) fixedly installed at the top end of the second opening and closing plate (16), a rack (23) fixedly installed on the top surface of the top plate (21), a rack (24) fixedly installed on the top surface of the tooth plate (22), and a gear set (25) in meshing connection between the rack (24) and the rack (23), wherein the top end of the gear set (25) is rotatably sleeved with a support frame (26), and the bottom end of the support frame (26) is fixedly connected with the supporting seat (8).

6. The test structure of claim 5, wherein: The driven opening and closing mechanism further comprises a rotating cylinder (27) fixedly installed on the top surface of the transfer disc (6), and a driving gear set (28) installed at equal angles on the outer ring of the rotating cylinder (27), wherein the driving gear set (28) is in intermittent meshing connection with the tooth plate (22), and the bottom surfaces of the top plate (21) and the tooth plate (22) are adhesively installed with a cleaning sponge (29).

7. The test structure of claim 1, wherein: The telescopic detection mechanism comprises a mounting plate (30) fixedly installed on the bottom surface of the right side of the fixed disc (3), a lower contact piece (31) embeddedly installed in the mounting plate (30), wherein the contact end of the lower contact piece (31) is in penetratingly embedded connection with the right side of the fixed disc (3), a limiting column (32) fixedly installed on the outer end top surface of the mounting plate (30), an inner groove (33) formed in the limiting column (32), a lifting rod (34) slidingly arranged in the inner groove (33), a lifting seat (35) fixedly installed at the top end of the lifting rod (34), a return spring (36) sleeved on the outer ring of the lifting rod (34) between the lifting seat (35) and the limiting column (32), wherein the upper and lower ends of the return spring (36) are fixedly connected with the lifting seat (35) and the limiting column (32) respectively, an upper contact piece (37) embeddedly installed in the lifting seat (35), and a detection controller (38) installed on the connecting ends of the upper contact piece (37) and the lower contact piece (31), wherein the bottom of the detection controller (38) is fixedly connected with the mounting plate (30).

8. The test structure of claim 7, wherein: The telescopic detection mechanism further comprises a connecting seat (39) fixedly installed on the left end of the lifting seat (35), a roller (40) rotatably installed at the bottom end of the connecting seat (39), a driving seat (41) fixedly installed on the top surface of the transfer disc (6), and the driving seat (41) in abutting connection with the roller (40), wherein the driving seat (41) is internally formed with recesses at equal angles.

9. The test structure of claim 7, wherein: The linkage opening and closing mechanism comprises limiting grooves (43) formed on both sides of the qualified discharge port (42), and a sliding bar (44) slidingly installed in the limiting grooves (43), wherein the inner side of the sliding bar (44) is fixedly connected with an opening and closing block (45).

10. The test structure of claim 9, wherein: The linkage opening and closing mechanism further comprises a supporting plate (46) fixedly installed on the bottom surface of the front end of the fixed disc (3), the top surface of the supporting plate (46) is fixedly installed with an electric push rod (47), the output end of the electric push rod (47) is fixedly connected with the opening and closing block (45), the electric push rod (47) drives the opening and closing block (45) to open and close the qualified discharge port (42), and the electric push rod (47) and the detection controller (38) are connected through a wire harness.

Images