A lithium battery testing device

Abstract

The present invention discloses a lithium battery testing device, which relates to the technical field of battery testing. It includes a fixed base frame, and a support frame is connected to the top of the fixed base frame. It also includes: a power mechanism, an impact assembly and an adjustment assembly assembled on the top of the fixed base frame. The impact assembly includes a connecting sleeve rod fixedly connected to the outer periphery of the power mechanism and a fixed frame fixedly connected to the top of the fixed base frame. An extension rod is slidably connected inside the connecting sleeve rod, and adjustment members are connected to one side of both the extension rod and the connecting sleeve rod. A connecting column is fixedly connected to the side of the extension rod away from the power mechanism. A connecting frame is installed on one side of the fixed frame, and a fixed column is connected between the inner walls of the connecting frame. The fixed column is connected to an impact block through a rotating rod rotatably connected to its outer periphery. By using the linkage mechanism of a rotating shaft, a pulley, a gear disk and a chute, the placement plate and the cylindrical lithium battery fixed thereon are driven to move along a predetermined trajectory, so that the impact block can perform periodic impacts at different positions of the cylindrical lithium battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery testing, and particularly to a lithium battery testing device. Background Art

[0002] Lithium batteries, especially cylindrical lithium batteries, as important carriers of modern energy storage, with their significant characteristics such as large capacity, long life, and low self-discharge rate, have been widely used in various electronic devices. However, in order to ensure that these batteries can still maintain a high level of safety and reliability in complex and changing usage environments, strict pre-factory testing is particularly important.

[0003] Among numerous testing items, the heavy object impact test is a key link in evaluating the safety performance of cylindrical lithium batteries. This test aims to simulate the heavy object impact that the battery may suffer in case of an accident to check whether dangerous situations such as fire and explosion will occur. To achieve this goal, traditional testing methods usually horizontally place a steel pipe above the cylindrical lithium battery as a stable support and guiding tool during impact, and then use heavy objects such as iron blocks to freely fall from a certain height to hit the steel pipe, thereby generating an impact on the battery.

[0004] However, although this testing method is simple and easy to implement, it has obvious limitations. Since the impact is transmitted to the battery only through a single contact point of the steel pipe, the test results may not comprehensively reflect the complexity and diversity of the internal structure of the battery. In fact, the material distribution and structure at each position inside the cylindrical lithium battery may be different. Therefore, only performing impact detection on a specific point obviously cannot obtain a comprehensive and objective safety performance evaluation. Summary of the Invention

[0005] The purpose of the present invention is to propose a solution to solve the problem that the traditional testing method has obvious limitations. Since the impact is transmitted to the battery only through a single contact point of the steel pipe, the test results may not comprehensively reflect the complexity and diversity of the internal structure of the battery. In fact, the material distribution and structure at each position inside the cylindrical lithium battery may be different. Therefore, only performing impact detection on a specific point obviously cannot obtain a comprehensive and objective safety performance evaluation.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: A lithium battery testing device includes a fixed chassis, a support frame is connected to the top of the fixed chassis, and further includes: a power mechanism, an impact component, and an adjustment component assembled on the top of the fixed chassis;

[0007] The impact assembly comprises a connecting sleeve rod fixedly connected to the outer periphery of the power mechanism and a fixed frame fixedly connected to the top of the fixed base frame, an extension rod is slidably connected inside the connecting sleeve rod, and an adjusting member is connected to one side of the extension rod and the connecting sleeve rod, a connecting column is fixedly connected to the side of the extension rod away from the power mechanism, a connecting frame is installed on one side of the fixed frame, a fixing column is connected between the inner walls of the connecting frame, a rotating rod connected to the fixing column by rotating the outer periphery is connected to the impact block, and the connecting column and the rotating rod are connected by a stop member;

[0008] The adjustment assembly includes a welding plate fixedly mounted on the top of the fixed base frame, an extension column is fixedly connected to one side of the welding plate, the extension column is connected to the power mechanism through a transmission member, the fixed base frame is slidably connected to a slider through a slide groove provided inside, the top of the slider is connected to a placement plate, the placement plate and the transmission member are meshed and connected through a plurality of gear teeth, and the top of the placement plate is connected to a cylindrical lithium battery to be tested through two fixed assemblies;

[0009] As the power mechanism rotates, the connecting sleeve rod is driven to rotate. As the connecting sleeve rod rotates, the abutting member is driven to lift the rotating rod, and the rotating rod is caused to rotate with the fixed column as the center, thereby driving the impact block to impact the fixed cylindrical lithium battery. As the power mechanism rotates, the placement plate is driven to slide through the drive of the transmission member, so that the cylindrical lithium battery moves while being impacted by the impact block as the placement plate moves.

[0010] As a further description of the above technical solution:

[0011] The adjusting part includes a welding frame fixedly installed on one side of the connecting sleeve rod and a plurality of fixing holes opened on one side of the connecting sleeve rod and the extension rod. A pull rod is slidably connected inside the welding frame. One end of the pull rod passes through the welding frame and is connected to a pressure plate. The end of the pressure plate away from the pull rod is connected to a fixing rod in contact with the fixing hole. A compression spring is connected between one side of the pressure plate and the welding frame.

[0012] As a further description of the above technical solution:

[0013] The abutment member comprises a connecting frame fixedly mounted on the bottom of the rotating rod, a positioning column is fixedly mounted between the inner walls of the connecting frame, and the positioning column is connected to the connecting column through a supporting rod.

[0014] As a further description of the above technical solution:

[0015] The transmission member comprises a belt pulley installed on the periphery of the power mechanism and a gear plate rotatably installed on the periphery of the extension column. A belt is connected between the gear plate and the belt pulley, and the gear plate is meshedly connected with a plurality of gear teeth.

[0016] As a further description of the above technical solution:

[0017] A number of inner grooves are provided on the outer periphery of the gear disk. A fixed cylinder is fixedly connected to the inner wall of the inner groove. A number of pressing grooves and abutting grooves adjacent to the pressing grooves are provided inside the fixed cylinder. A pressing block is slidably connected to the inner wall of the fixed cylinder. A number of pressing blocks embedded in the pressing grooves are connected to the outer periphery of the pressing block. A support column is slidably connected inside the pressing block. An inclined block in contact with the pressing block is connected to the outer periphery of the support column. A connecting gear is connected to the bottom of the support column. The connecting gear is connected to the inner groove through a pressing spring.

[0018] As a further description of the above technical solution:

[0019] The fixing component includes two opposite support blocks fixedly installed on the top of the placement plate. An inner groove is provided inside the support block. A placement block is rotatably connected to the inner wall of the inner groove. A compression plate is slidably connected to the inner wall of the placement block through a limiting plate. A pulling rod is fixedly connected to the inside of the compression plate. One end of the pulling rod extends out of the support block and is connected to an abutting plate. A number of pressure springs are connected between the compression plate and the placement block, and the pressure springs are arranged in a circular array.

[0020] As a further description of the above technical solution:

[0021] A rotating component is installed on the top of the fixed chassis. The rotating component includes a limiting rod connected to one side of the placement block and a C-shaped plate fixedly installed on the top of the fixed chassis. A rotating column is rotatably connected inside the C-shaped plate. One end of the rotating column extends out of the C-shaped plate and is connected to a rotating disk. A fixing screw in contact with the C-shaped plate is threadedly connected inside the rotating disk. The other end of the rotating column passes through the C-shaped plate and is connected to a rotating disk. A number of rotating blocks are connected to the side of the rotating disk away from the fixing screw. A spiral cylinder is fixedly connected to one side of each rotating block. A straight groove and a spiral groove communicating with the straight groove are provided inside the spiral cylinder.

[0022] As a further description of the above technical solution:

[0023] The power mechanism includes a servo motor fixedly installed on the top of the fixed chassis and a connecting shaft rotatably installed inside the support frame. A rotating shaft is connected to one side of the servo motor through an output shaft. A driving wheel is connected to the outer periphery of the rotating shaft. A driven wheel is connected to the outer periphery of the connecting shaft. The driving wheel and the driven wheel are connected through a tension belt.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] As the rotating shaft rotates, the pulley transmits power to the gear disc via the belt, and then drives a series of teeth and the placement plate connected thereto. During this process, the placement plate not only moves smoothly along the preset trajectory, but also drives the cylindrical lithium battery fixed on it to move synchronously, thus realizing the multi-point change of the impact point position. This design ensures that the battery can be impacted from different positions during the test, effectively improving the comprehensiveness of the test;

[0026] To further enhance the flexibility of the test, we introduced a convenient spacing adjustment function. By simply pressing, the number of meshes between the connecting gear and the teeth can be adjusted, thereby precisely controlling the distance between each impact point. This innovative design not only simplifies the adjustment process but also greatly improves the test efficiency;

[0027] During the test, the synchronous movement of the fixing component and the placement plate ensures the stability of the test. In particular, the ingenious combination of the spiral cylinder and the limiting rod can guide the placement block and the fixed battery to rotate automatically after the test is completed, realizing the replacement of the test surface. This automatic flipping mechanism greatly saves the test preparation time and ensures the continuity and efficiency of the test;

[0028] Finally, through the precise control of the servo motor, the placement plate can move back and forth along the preset path, enabling the battery to switch between different test surfaces and comprehensively covering all possible impact areas on the outer surface of the battery. This comprehensive and efficient impact detection method not only improves the accuracy of the test but also provides strong support for the safety performance evaluation of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Shows the overall structural schematic diagram according to the present invention;

[0030] Figure 2 Shows the structural schematic diagram of the power mechanism according to the present invention;

[0031] Figure 3 Shows the structural schematic diagram of the impact component and the adjustment component according to the present invention;

[0032] Figure 4 Shows according to the present invention Figure 3 The enlarged schematic diagram at A in;

[0033] Figure 5 Shows the disassembled structural schematic diagram of the adjustment component according to the present invention;

[0034] Figure 6 Shows the disassembled structural schematic diagram of the impact component according to the present invention;

[0035] Figure 7 Shows the structural schematic diagram of the connecting sleeve rod according to the present invention;

[0036] Figure 8 Shows a schematic internal structure diagram of a fixing component according to the present invention;

[0037] Figure 9 Shows a schematic structure diagram of a rotating component according to the present invention.

[0038] Legend Explanation:

[0039] 10. Fixed chassis; 11. Support frame; 12. Cylindrical lithium battery;

[0040] 20. Power mechanism; 21. Servo motor; 22. Rotating shaft; 23. Driving wheel; 24. Tension belt; 25. Driven wheel; 26. Connecting shaft;

[0041] 30. Impact component; 31. Connecting sleeve rod; 32. Extension rod; 33. Welding frame; 331. Pull rod; 332. Fixed rod; 333. Pressing plate; 334. Compression spring; 335. Fixed hole; 34. Connecting column; 35. Fixed frame; 36. Connecting frame; 361. Fixed column; 362. Rotating rod; 363. Impact block; 37. Connecting frame; 371. Positioning column; 372. Support rod;

[0042] 40. Adjusting component; 41. Placing plate; 411. Slide block; 412. Slide groove; 413. Teeth; 42. Welding plate; 43. Extension column; 44. Gear disk; 441. Fixed cylinder; 442. Pressing groove; 443. Abutting groove; 444. Pressing block; 445. Pressing block; 446. Inclined block; 447. Connecting gear; 448. Support column; 449. Pressing spring; 45. Pulley; 46. Belt;

[0043] 50. Fixing component; 51. Support block; 52. Placing block; 521. Compression plate; 522. Pressure spring; 53. Pulling rod; 54. Abutting plate;

[0044] 60. Rotating component; 61. Limiting rod; 62. C-shaped plate; 621. Rotating column; 622. Rotating disk; 623. Rotating plate; 624. Rotating block; 63. Fixed screw; 64. Spiral cylinder; 641. Linear groove; 642. Spiral groove. Detailed Implementation Manner

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] AsFigures 1-9 As shown in the figure, a lithium battery testing device provided by the present invention includes a fixed chassis 10. A support frame 11 is connected to the top of the fixed chassis 10. It further includes: a power mechanism 20, an impact assembly 30, an adjustment assembly 40, and a fixing assembly 50 assembled on the top of the fixed chassis 10;

[0047] As Figure 1 , Figure 2 , Figure 3 , Figure 8 As shown in the figure, the fixing assembly 50 includes two opposite support blocks 51 fixedly installed on the top of the placement plate 41. An inner groove is provided inside the support block 51. A placement block 52 is rotatably connected to the inner wall of the inner groove. A compression plate 521 is slidably connected to the inner wall of the placement block 52 through a limiting plate. A pulling rod 53 is fixedly connected inside the compression plate 521. One end of the pulling rod 53 extends out of the support block 51 and is connected to an abutting plate 54. The protruding end of the cylindrical lithium battery 12 is embedded inside the abutting plate 54. A plurality of pressure springs 522 are connected between the compression plate 521 and the placement block 52, and the pressure springs 522 are arranged in a circular array;

[0048] Before conducting the sampling impact test on the cylindrical lithium battery 12, a key step is to ensure that the battery is firmly installed on the testing device. This process requires accurately placing the cylindrical lithium battery 12 between the two abutting plates 54. To achieve this goal, first, pull the two pulling rods 53. The movement of the pulling rods 53 drives the corresponding displacement of the compression plate 521 inside the placement block 52. At the same time, the movement of the pulling rods 53 also pulls the abutting plates 54 to move together, and at the same time squeezes a plurality of pressure springs 522 inside the placement block 52. As the two abutting plates 54 move away from each other, space is created for the placement of the cylindrical lithium battery 12;

[0049] As the compression plate 521 moves deeper inside the placement block 52, it gradually compresses a plurality of pressure springs 522, and these pressure springs 522 are thus in a compressed state. When the cylindrical lithium battery 12 is accurately placed between the two abutting plates 54, the pulling rods 53 can be released at this time. Once the external force is removed, the pressure springs 522 in the compressed state will quickly rebound. Through their resilience, the two abutting plates 54 will tightly clamp the cylindrical lithium battery 12, thereby ensuring that it remains stable and immovable during the impact test. Such a design not only ensures the accuracy of the test but also improves the safety of the test process.

[0050] As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, the power mechanism 20 includes a servo motor 21 fixedly installed on the top of the fixed chassis 10 and a connecting shaft 26 rotatably installed inside the support frame 11. One side of the servo motor 21 is connected with a rotating shaft 22 through an output shaft. An active pulley 23 is connected to the outer periphery of the rotating shaft 22, a driven pulley 25 is connected to the outer periphery of the connecting shaft 26, and the active pulley 23 and the driven pulley 25 are connected by a tension belt 24;

[0051] After successfully fixing the cylindrical lithium battery 12, the preparatory work for the impact test enters the next stage. At this time, the servo motor 21 is started. The servo motor 21 immediately drives the rotating shaft 22 to start rotating. As the rotating shaft 22 rotates, the active pulley 23 connected thereto also rotates synchronously. Through the transmission of the tension belt 24, the active pulley 23 transmits the rotational force to the driven pulley 25, causing the driven pulley 25 to start rotating. As the driven pulley 25 rotates, it drives the connecting shaft 26 to rotate correspondingly inside the support frame 11. This series of coherent actions provides the necessary power source and transmission path for the subsequent impact test, ensuring the smooth progress of the test process.

[0052] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 As shown in the figure, the impact assembly 30 includes a connecting sleeve rod 31 fixedly connected to the outer periphery of the connecting shaft 26 and a fixing frame 35 fixedly connected to the top of the fixed chassis 10. An extension rod 32 is slidably connected inside the connecting sleeve rod 31, and adjusting members are connected to both the extension rod 32 and one side of the connecting sleeve rod 31. The adjusting member includes a welding frame 33 fixedly installed on one side of the connecting sleeve rod 31 and a number of fixing holes 335 opened on one side of the connecting sleeve rod 31 and the extension rod 32. A pull rod 331 is slidably connected inside the welding frame 33. One end of the pull rod 331 passes through the welding frame 33 and is connected with a pressing plate 333. One end of the pressing plate 333 away from the pull rod 331 is connected with a fixing rod 332 that contacts the fixing hole 335. A compression spring 334 is connected between one side of the pressing plate 333 and the welding frame 33. The compression spring 334 is sleeved on the outer periphery of the pull rod 331. One side of the extension rod 32 away from the power mechanism 20 is fixedly connected with a connecting column 34. A connecting frame 36 is installed on one side of the fixing frame 35. A fixing column 361 is connected between the inner walls of the connecting frame 36. The fixing column 361 is connected with an impact block 363 through a rotating rod 362 rotatably connected to the outer periphery. The connecting column 34 and the rotating rod 362 are connected through a moving member. The moving member includes an adapter frame 37 fixedly installed at the bottom of the rotating rod 362. A positioning column 371 is fixedly installed between the inner walls of the adapter frame 37, and the positioning column 371 and the connecting column 34 are connected through a support rod 372;

[0053] Driven by the continuous rotation of the connecting shaft 26, the connecting sleeve rod 31 also rotates synchronously. This rotation action is transmitted to the support rod 372 through the connecting column 34 on one side of the connecting sleeve rod 31, pushing it to move. The movement of the support rod 372 then triggers the connecting frame 37 at the top of the positioning column 371, causing the rotating rod 362 connected to it to rotate around the fixed column 361 as the center. As the rotation of the connecting shaft 26 deepens, the rotating rod 362 gradually descends, and the impact block 363 at its end impacts the already fixed cylindrical lithium battery 12, thus realizing the impact test on the cylindrical lithium battery 12.

[0054] To flexibly adjust the impact test force, by pulling the pull rod 331, it smoothly slides along the inner wall of the welding frame 33. This action drives the pressing plate 333 and the fixed rod 332 connected to it to move, causing the fixed rod 332 to disengage from the fixing holes 335 of the connecting sleeve rod 31 and the extension rod 32. During this process, the movement of the pressing plate 333 also squeezes the compression spring 334. Once the fixed rod 332 completely moves out of the fixing hole 335 of the extension rod 32, the extension rod 32 can be manually pulled up and down to adjust its extended length. After adjustment, release the pull rod 331, and the compressed compression spring 334 quickly rebounds, pushing the pressing plate 333 and the fixed rod 332 back into the fixing holes 335 of the connecting sleeve rod 31 and the extension rod 32 to complete the fixed connection between the connecting sleeve rod 31 and the extension rod 32. It should be noted that the extended length of the extension rod 32 directly determines the impact force of the impact block 363 on the cylindrical lithium battery 12. Combining with the rotation speed control of the servo motor 21, flexible switching of the rotation speed can be achieved during the impact on the cylindrical lithium battery 12.

[0055] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 shown, the adjusting assembly 40 includes a welding plate 42 fixedly installed on the top of the fixed chassis 10. One side of the welding plate 42 is fixedly connected with an extension column 43. The extension column 43 is connected to the power mechanism 20 through a transmission member. The fixed chassis 10 is slidably connected with a slider 411 through a chute 412 opened inside. The top of the slider 411 is connected with a placement plate 41. The placement plate 41 is meshed with the transmission member through a number of gear teeth 413. The top of the placement plate 41 is connected with the cylindrical lithium battery 12 to be tested through two fixing assemblies 50. The transmission member includes a pulley 45 installed on the outer periphery of the power mechanism 20 and a gear disc 44 rotatably installed on the outer periphery of the extension column 43. The gear disc 44 as Figure 5As shown, one tooth is fixed. There is a belt 46 connecting the gear disc 44 and the pulley 45. The gear disc 44 is meshed and connected with a number of teeth 413. The outer periphery of the gear disc 44 is provided with a number of inner grooves. The inner wall of the inner groove is fixedly connected with a fixed cylinder 441. The inside of the fixed cylinder 441 is provided with a number of pressing grooves 442 and abutting grooves 443 adjacent to the pressing grooves 442. The inner wall of the fixed cylinder 441 is slidably connected with a pressing block 444. The outer periphery of the pressing block 444 is connected with a number of pressing blocks 445 that are embedded in the pressing grooves 442. The inside of the pressing block 444 is slidably connected with a support column 448. The outer periphery of the support column 448 is connected with an inclined block 446 that contacts the pressing block 445. The inclined surfaces between the pressing block 445 and the inclined block 446 are in contact. The bottom of the support column 448 is connected with a connecting gear 447. The connecting gear 447 is connected with the inner groove through a pressing spring 449;

[0056] In order to perform multi-point impact tests on the fixed cylindrical lithium battery 12, as the rotating shaft 22 rotates, it synchronously drives the rotation of the pulley 45. Through the transmission of the belt 46, the pulley 45 transmits the rotational force to the gear disc 44, causing the gear disc 44 to start rotating. The rotation of the gear disc 44 further drives a number of teeth 413 meshed with it. These teeth 413 are respectively connected to the placement plate 41. Since the placement plate 41 also slides through the cooperation of the slider 411 and the chute 412, as the gear disc 44 continues to rotate, the placement plate 41 will move along the trajectory of the chute 412;

[0057] This movement process ensures that the cylindrical lithium battery 12 fixed on the placement plate 41 also moves accordingly, thus changing the position of the cylindrical lithium battery 12 relative to the impact block 363. As the impact block 363 performs periodic impacts driven by the servo motor 21, and because the placement plate 41 drives the cylindrical lithium battery 12 to move, the impact block 363 can impact different positions of the cylindrical lithium battery 12, thereby achieving the effect of multi-point impact tests. Such a design not only improves the comprehensiveness of the test but also ensures the accuracy and reliability of the test;

[0058] In order to conveniently adjust the spacing between multiple impacts, by pushing the pressing block 444, it drives the pressing block 445 to squeeze the inclined block 446 to move. As the inclined block 446 moves, the connecting gear 447 on the support column 448 it is connected to will squeeze the pressing spring 449. At the same time, the inclined block 446 gradually moves out of the pressing groove 442. With the continuous pushing of the pressing block 445, due to the inclined surface contact between the two, the inclined block 446 will be pushed to contact the abutting groove 443. At this time, the connecting gear 447 is meshed and connected with a plurality of gear teeth 413, and the limit fixing of the connecting gear 447 is realized through the limitation of the abutting groove 443. By adjusting the number of connecting gears 447 meshed with the gear teeth 413, the distance between each impact point of the cylindrical lithium battery 12 can be controlled;

[0059] When it is necessary to disconnect the connection between the connecting gear 447 and the gear teeth 413, push the pressing block 444 again to move the support column 448. As the support column 448 moves, the inclined block 446 contacts the inclined surface of the abutting groove 443. Subsequently, under the resilience of the pressing spring 449, the inclined block 446 returns to the pressing groove 442 again to prepare for the next adjustment. Such a design is both convenient and efficient, and can flexibly adjust the impact spacing.

[0060] As Figure 1 、 Figure 9 shown, two sets of rotating components 60 are installed on the top of the fixed chassis 10. As Figure 9 shown, the linear groove 641 of the rotating component 60 on the right is shorter than that of the rotating component 60 on the left, and the setting of the spiral groove 642 on the right enables the cylindrical lithium battery 12 to be rotationally adjusted in one direction. The rotating component 60 includes a limiting rod 61 connected to one side of the placing block 52 and a C-shaped plate 62 fixedly installed on the top of the fixed chassis 10. A rotating column 621 is rotatably connected inside the C-shaped plate 62. One end of the rotating column 621 extends out of the C-shaped plate 62 and is connected with a rotating disk 622. A fixing screw 63 in contact with the C-shaped plate 62 is threadedly connected inside the rotating disk 622. The other end of the rotating column 621 passes through the C-shaped plate 62 and is connected with a rotating disk 623. A plurality of rotating blocks 624 are connected to the side of the rotating disk 623 away from the fixing screw 63. A spiral cylinder 64 is fixedly connected to one side of each rotating block 624. A linear groove 641 and a spiral groove 642 communicating with the linear groove 641 are opened inside the spiral cylinder 64;

[0061] During the testing process, as the placement plate 41 moves smoothly, the fixing component 50 will be displaced synchronously. During this movement, the limiting rod 61 connected to the placement block 52 in the fixing component 50 will slide smoothly along the preset linear groove 641 in the spiral cylinder 64. When the impact test is over, the limiting rod 61 will continue to move along the spiral groove 642 of the spiral cylinder 64. During this process, the spiral groove 642 will guide the limiting rod 61 to drive the placement block 52 to rotate. At the same time, due to the precise fit between the placement block 52 and the inner groove and the limiting plate in the support block 51, the compression plate 521 will also rotate accordingly. Then, through the abutting plate 54 connected by the pulling rod 53, the cylindrical lithium battery 12 firmly fixed by it will also start to rotate;

[0062] At this time, the servo motor 21 will reverse. Through the precise control of the adjustment component 40, the placement plate 41 is pulled back to move, so that the cylindrical lithium battery 12 with the changed angle faces the impact of the impact component 30 again, thereby realizing the impact test on different surfaces of the battery. When the placement plate 41 moves back and reaches the specified position, the limiting rod 61 on the other side will enter the spiral groove 642 along the linear groove 641 of the spiral cylinder 64 again. With the complete reset of the placement plate 41, the cylindrical lithium battery 12 will change to a new test surface again. Through this reciprocating movement method, the impact detection of the outer surface of the cylindrical lithium battery 12 can be completed comprehensively and efficiently;

[0063] By turning the fixing screw 63, the fixing restriction on the rotation of the rotating disk 622 can be easily released. Then, manually rotating the rotating disk 622 can drive the rotating column 621 and the rotating disk 623 to rotate, thereby adjusting the contact position between the spiral cylinder 64 and the limiting rod 61 at different angles to meet the impact test requirements of the cylindrical lithium battery 12 at different angles. This design greatly enhances the versatility and practicality of the test system.

[0064] Working principle: In order to conduct an impact test on the sampled cylindrical lithium battery 12, it is first necessary to install it between the two abutting plates 54. By operating the pulling rod 53, the compression plate 521 and the abutting plate 54 are driven to move. At the same time, the compression plate 521 squeezes the pressure spring 522. After the cylindrical lithium battery 12 is placed in place, the pulling rod 53 is released, and the pressure spring 522 rebounds to fix the cylindrical lithium battery 12 through the abutting plate 54;

[0065] After the fixation is completed, the servo motor 21 is started to drive the rotating shaft 22 and the driving wheel 23 to rotate. The driving wheel 23 drives the driven wheel 25 and the connecting shaft 26 to rotate synchronously through the tension belt 24. The rotation of the connecting shaft 26 further drives the connecting sleeve rod 31 to rotate, and pushes the support rod 372 through the connecting column 34, so that the rotating rod 362 rotates and descends around the fixed column 361, and finally the impact block 363 conducts an impact test on the fixed cylindrical lithium battery 12;

[0066] To adjust the impact force, the pull rod 331 can be pulled to disengage the fixed rod 332 from the fixing hole 335 connecting the sleeve rod 31 and the extension rod 32. Subsequently, the length of the extension rod 32 is adjusted, and by releasing the pull rod 331, the fixed rod 332 is re-fixed in the hole by the resilience of the compression spring 334. The length of the extension rod 32 determines the magnitude of the impact force. In combination with the operation of the servo motor 21, the switching between fast and slow impacts can be achieved.

[0067] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A lithium battery testing device, comprising a fixed base frame (10), the top of the fixed base frame (10) being connected to a support frame (11), characterized in that: Also includes: A power mechanism (20), an impact assembly (30), and an adjustment assembly (40) assembled on the top of the fixed base frame (10); The impact assembly (30) comprises a connecting sleeve rod (31) fixedly connected to the outer periphery of the power mechanism (20) and a fixing frame (35) fixedly connected to the top of the fixed base frame (10); an extension rod (32) is slidably connected inside the connecting sleeve rod (31); and an adjusting member is connected to one side of the extension rod (32) and the connecting sleeve rod (31); a connecting column (34) is fixedly connected to the side of the extension rod (32) away from the power mechanism (20); a connecting frame (36) is installed on one side of the fixing frame (35); a fixing column (361) is connected between the inner walls of the connecting frame (36); the fixing column (361) is connected to an impact block (363) via a rotating rod (362) rotatably connected to the outer periphery; and the connecting column (34) and the rotating rod (362) are connected via a stop member; The adjustment assembly (40) comprises a welding plate (42) fixedly mounted on the top of the fixed base frame (10); an extension column (43) is fixedly connected to one side of the welding plate (42); the extension column (43) is connected to the power mechanism (20) via a transmission member; the fixed base frame (10) is slidably connected to a slider (411) via a slide groove (412) provided inside; the top of the slider (411) is connected to a placement plate (41); the placement plate (41) and the transmission member are meshedly connected via a plurality of gear teeth (413); the top of the placement plate (41) is connected to a cylindrical lithium battery (12) to be tested via two fixed assemblies (50); As the power mechanism (20) rotates, the connecting sleeve rod (31) is driven to rotate. As the connecting sleeve rod (31) rotates, the abutting member is driven to lift the rotating rod (362), and the rotating rod (362) is caused to rotate with the fixed column (361) as the center of the circle, thereby driving the impact block (363) to impact the fixed cylindrical lithium battery (12). As the power mechanism (20) rotates, the placement plate (41) is driven to slide by the transmission member, so that the cylindrical lithium battery (12) moves while being impacted by the impact block (363) as the placement plate (41) moves; The fixing assembly (50) comprises two opposing support blocks (51) fixedly mounted on the top of the placement plate (41); an inner groove is provided inside the support block (51); the inner wall of the inner groove is rotatably connected to a placement block (52); the inner wall of the placement block (52) is slidably connected to a compression plate (521) via a limit plate; a pulling rod (53) is fixedly connected inside the compression plate (521); one end of the pulling rod (53) extends out of the support block (51) and is connected to an abutment plate (54); a plurality of pressure springs (522) are connected between the compression plate (521) and the placement block (52); and the pressure springs (522) are arranged in a circular array; A rotating assembly (60) is installed on the top of the fixed base frame (10). The rotating assembly (60) comprises a limit rod (61) connected to one side of the placement block (52) and a C-shaped plate (62) fixedly installed on the top of the fixed base frame (10). The C-shaped plate (62) is internally rotatably connected to a rotating column (621). One end of the rotating column (621) extends out of the C-shaped plate (62) and is connected to a rotating disk (622). The internal thread of the rotating disk (622) is connected to a fixing screw (63) in contact with the C-shaped plate (62). The other end of the rotating column (621) passes through the C-shaped plate (62) and is connected to the rotating disk (623). A side of the rotating disk (623) away from the fixing screw (63) is connected to a plurality of rotating blocks (624). One side of each rotating block (624) is fixedly connected to a spiral barrel (64). A linear groove (641) and a spiral groove (642) communicating with the linear groove (641) are provided inside the spiral barrel (64).

2. A lithium battery testing device according to claim 1, characterized in that: The adjusting member comprises a welding frame (33) fixedly mounted on one side of the connecting sleeve rod (31) and a plurality of fixing holes (335) opened on one side of the connecting sleeve rod (31) and the extension rod (32); a pull rod (331) is slidably connected inside the welding frame (33); one end of the pull rod (331) passes through the welding frame (33) and is connected to a pressing plate (333); one end of the pressing plate (333) away from the pull rod (331) is connected to a fixing rod (332) in contact with the fixing hole (335); and a compression spring (334) is connected between one side of the pressing plate (333) and the welding frame (33).

3. A lithium battery testing device according to claim 2, characterized in that: The abutment member comprises a connection frame (37) fixedly mounted on the bottom of the rotating rod (362), a positioning column (371) is fixedly mounted between the inner walls of the connection frame (37), and the positioning column (371) and the connection column (34) are connected via a support rod (372).

4. A lithium battery testing device according to claim 1, characterized in that: The transmission member comprises a pulley (45) mounted on the periphery of the power mechanism (20) and a gear plate (44) rotatably mounted on the periphery of the extension column (43); a belt (46) is connected between the gear plate (44) and the pulley (45); and the gear plate (44) is meshingly connected with a plurality of gear teeth (413).

5. A lithium battery testing device according to claim 4, characterized in that: The gear plate (44) is provided with a plurality of inner grooves on its outer circumference, a fixed cylinder (441) is fixedly connected to the inner wall of the inner groove, a plurality of pressing grooves (442) and abutting grooves (443) adjacent to the pressing grooves (442) are provided inside the fixed cylinder (441), a pressing block (444) is slidably connected to the inner wall of the fixed cylinder (441), a plurality of abutting blocks (445) embedded in the pressing grooves (442) are connected to the outer circumference of the pressing block (444), a support column (448) is slidably connected to the inside of the pressing block (444), an inclined block (446) in contact with the abutting block (445) is connected to the outer circumference of the support column (448), a connecting gear (447) is connected to the bottom of the support column (448), and the connecting gear (447) and the inner groove are connected via a pressing spring (449).

6. A lithium battery testing device according to claim 1, characterized in that: The power mechanism (20) comprises a servo motor (21) fixedly mounted on the top of the fixed base frame (10) and a connecting shaft (26) rotatably mounted inside the support frame (11); one side of the servo motor (21) is connected to a rotating shaft (22) via an output shaft; the outer periphery of the rotating shaft (22) is connected to a driving wheel (23); the outer periphery of the connecting shaft (26) is connected to a driven wheel (25); and the driving wheel (23) and the driven wheel (25) are connected via a tensioning belt (24).

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