A new energy lithium battery impact testing device

Abstract

The application relates to the technical field of battery safety testing, and discloses a new energy lithium battery impact testing device, which comprises a base, a rack arranged on the base and a testing guide rod, further comprises a lifting mechanism arranged on the base and a testing mechanism slidingly assembled on the testing guide rod; the testing mechanism comprises a testing plate, the bottom of the testing plate is fixed with a testing seat, and the bottom of the testing seat is fixed with a testing block for planar impact on the lithium battery. The new energy lithium battery impact testing device is provided with an adjusting assembly capable of horizontally adjusting the position, a lifting assembly capable of up-down telescopic adjustment and an impact assembly integrating an impact block and a puncture needle in the testing seat, so that the device can be freely switched among three modes of planar impact, point impact and puncture impact, the overall impact, local point impact and puncture test on the lithium battery can be completed without disassembling and replacing any tool parts, and the diversified and all-round lithium battery safety performance test demand is met.

Description

Technical Field

[0001] This invention relates to the field of battery safety testing technology, and in particular to a new energy lithium battery impact testing device. Background Technology

[0002] In recent years, new energy lithium batteries have been widely used in many fields such as new energy vehicles, energy storage power stations, and portable electronic devices due to their advantages such as high energy density, long cycle life, and no memory effect, becoming a core energy storage component of the new energy industry. However, during actual assembly and use, lithium batteries are susceptible to mechanical abuse conditions such as collisions, compression, and punctures, which can easily lead to safety accidents such as internal short circuits, thermal runaway, and even fires and explosions. Therefore, standardized impact tests are essential for the safety verification of lithium batteries.

[0003] Impact testing typically includes two core types: ordinary heavy object impact testing and sharp object puncture testing. The former is used to evaluate the overall impact resistance of the battery structure, while the latter is used to simulate the failure state of the battery after being punctured by a sharp object. Through systematic testing, the safety performance of the battery under different mechanical conditions can be fully understood, providing key data support for battery structure optimization and safety protection design, which is of great significance for comprehensively evaluating the safety of lithium batteries.

[0004] However, existing battery impact testing devices still have many obvious shortcomings and deficiencies. In terms of testing functions, most existing lithium battery impact testing devices are limited to one of the following modes: ordinary impact or puncture testing. When switching test types is required, the machine must be stopped and the impact and puncture components must be manually replaced, which is cumbersome and inefficient, making it difficult to meet the needs of continuous and diversified testing. At the same time, existing devices generally cannot flexibly adjust the impact position according to actual testing requirements. This makes it difficult to conduct directional testing on different weak points such as the center and corners of the battery in actual testing, thus failing to obtain diverse data generated by different impact points of the lithium battery. The test coverage is limited, the data is not comprehensive enough, and it cannot fully reflect the safety characteristics of lithium batteries under real complex working conditions, resulting in obvious application limitations. Therefore, these devices are insufficient and cannot meet the testing needs of manufacturers, so further improvement is necessary.

[0005] Therefore, in view of this, we will study and improve the existing structure and its shortcomings to provide a new energy lithium battery impact testing device, in order to achieve a more practical purpose. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problems of lithium battery impact testing devices having limited functionality, cumbersome operation for switching test types, and limited test coverage due to the inability to flexibly adjust the impact position.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A new energy lithium battery impact testing device includes a base, a frame and a test guide rod mounted on the base, a lifting mechanism mounted on the base, and a test mechanism slidably mounted on the test guide rod. The testing mechanism includes a test board, a test base is fixed to the bottom of the test board, and a test block for impacting the lithium battery is fixed to the bottom of the test base. The test holder and the test block share an internal cavity, in which an impact mechanism is built. The impact mechanism includes a drive assembly, an adjustment assembly connected to the drive assembly, a lifting assembly mounted on the adjustment assembly, and an impact assembly mounted on the lifting assembly. The impact assembly includes an impact block for point impact on the lithium battery and a puncture needle for puncture impact on the lithium battery. The drive component is used to drive the adjustment component to achieve the switching adjustment of the impact point. The lifting component is used to drive the impact component to move vertically downward, so that the impact block completes the point impact test on the lithium battery. At the same time, the impact component can extend the puncture needle and complete the puncture impact test on the lithium battery. The independent switching of the three modes of planar impact, point impact and puncture impact can be achieved by switching the work station.

[0008] As a further description of the above technical solution: The lifting mechanism includes a lifting assembly, which includes a fixed plate fixed to one side of the base. A lifting motor is mounted on the upper side of the fixed plate. A take-up reel is fixedly connected to the output end of the lifting motor, and a steel wire rope is installed inside the take-up reel.

[0009] As a further description of the above technical solution: The lifting mechanism also includes an electromagnetic adsorption assembly, which includes a guide plate slidably mounted on the test guide rod. An electromagnet block is fixedly installed at the bottom of the guide plate, and the upper side of the guide plate is fixedly connected to a steel wire rope.

[0010] As a further description of the above technical solution: The lifting mechanism also includes guide rollers fixed on the frame. The guide rollers are adapted to and cooperate with the wire rope to realize the guiding and limiting transmission of the wire rope.

[0011] As a further description of the above technical solution: A guide sleeve is fixedly installed on the test plate, and the guide sleeve is slidably assembled on the test guide rod. Three opening slots are opened at the bottom of the test block.

[0012] As a further description of the above technical solution: The drive assembly includes a fixed frame fixed to the inner wall of the test base. A drive motor is mounted on one side of the fixed frame. A drive turntable is fixedly connected to the output end of the drive motor. A drive rod is movably mounted on the drive turntable.

[0013] As a further description of the above technical solution: The adjustment assembly includes an adjustment frame fixed to the inner wall of the test seat, a fixed guide rail fixedly installed on the adjustment frame, a movable guide block slidably installed on the fixed guide rail, an adjustment seat fixedly installed on the movable guide block, and an adjustment component fixedly installed on the adjustment seat. The end of the drive rod furthest from the drive turntable is movably connected to the adjusting component.

[0014] As a further description of the above technical solution: The lifting assembly includes a fixed base block fixed on the adjusting seat and a lifting block slidably mounted on the adjusting seat. A lifting motor is mounted on the fixed base block, and a lifting screw is fixedly connected to the output end of the lifting motor. The lifting screw and the lifting block are engaged by a threaded connection.

[0015] As a further description of the above technical solution: The impact assembly includes an impact frame fixed to the lifting block. One side of the impact frame is fixedly connected to the impact block, and a connecting frame is fixedly installed on the other side of the impact frame. An adjusting motor is fixed on the connecting frame, and a driving gear is fixedly connected to the output end of the adjusting motor. A driven gear is meshed with one side of the driving gear, and the driven gear is rotatably mounted on the impact block through a rotating ring.

[0016] As a further description of the above technical solution: The impact block has an internal cavity, and the driven gear is threadedly connected to an adjusting screw in the middle. The lower end of the adjusting screw extends into the internal cavity of the impact block and is fixedly connected to the movable slider. The bottom of the movable slider is fixedly connected to the top of the puncture needle. A limiting groove is formed on the inner cavity wall of the impact block, and a limiting block is fixedly installed on the outer side of the movable slider, with the limiting block located in the limiting groove.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This new energy lithium battery impact testing device, by setting up a horizontally adjustable adjustment component, a vertically extendable lifting component, and an impact component integrating an impact block and a puncture needle inside the test seat, allows the device to freely switch between three modes: planar impact, point impact, and puncture impact. Without disassembling or replacing any tooling parts, it can complete the overall impact, local fixed-point impact, and puncture tests on lithium batteries. It accurately detects the battery's impact resistance, structural strength, response characteristics and failure patterns under single-point force, as well as safety performance such as internal short circuits and thermal runaway under puncture conditions, meeting diverse and comprehensive lithium battery safety performance testing needs.

[0018] 2. This new energy lithium battery impact testing device, with its adjustable impact position, impact method, and puncture stroke, allows for free switching of the impact position according to testing needs. It can conduct directional impact tests on different points such as the center and corners of the lithium battery, realistically reproducing the complex working conditions such as collisions, compression, and punctures that the battery may encounter in actual use. It comprehensively obtains the response characteristics and failure patterns of the battery under different stress forms, solving the problems of traditional devices that cannot adjust the impact position and have limited test coverage. It greatly enriches the test conditions and improves the comprehensiveness of the test data.

[0019] 3. This new energy lithium battery impact testing device, through the coordinated action between the test plate that can slide along the test guide rod and the lifting mechanism, can realize the adjustment and stable lifting of the impact mechanism's height, ensuring that the impact mechanism is reliably released at the set height, so that the impact process is only subject to gravity, resulting in stable, consistent, and highly repeatable impact force. At the same time, it effectively improves the device's operational stability and safety, providing a stable and reliable foundation for various impact tests, and significantly improving the accuracy and reliability of test data. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the overall three-dimensional structure provided according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the mounting structure of the base and guide rollers according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the installation structure of the electromagnetic adsorption assembly and testing mechanism provided according to an embodiment of the present invention is shown; Figure 4A schematic diagram of the mounting structure of the base and landing assembly provided according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the wire rope and guide roller installation structure provided according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the installation structure of the test mechanism and test guide rod provided according to an embodiment of the present invention is shown; Figure 7 A partial structural schematic diagram of the test holder and test block provided according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the installation structure of the test seat and impact mechanism provided according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the overall structure of the impact mechanism provided according to an embodiment of the present invention is shown; Figure 10 A schematic diagram of the deployment structure of the impact mechanism provided according to an embodiment of the present invention is shown; Figure 11 A partial structural schematic diagram of an impact assembly provided according to an embodiment of the present invention is shown.

[0022] Legend: 10. Base; 11. Frame; 12. Test guide rod; 20. Lifting and lowering mechanism; 21. Lifting and lowering assembly; 211. Fixing plate; 212. Lifting and lowering motor; 213. Take-up reel; 214. Wire rope; 22. Electromagnetic adsorption assembly; 221. Guide plate; 222. Electromagnetic block; 23. Guide roller; 30. Testing mechanism; 31. Testing plate; 311. Guide sleeve; 32. Testing seat; 33. Testing block; 331. Opening slot; 40. Impact mechanism; 41. Drive assembly; 411. Fixing frame; 412. Drive motor; 413. Drive turntable; 414. Drive rod; 42. Adjustment assembly; 421. Adjustment frame; 422. Fixed guide rail; 423. Movable guide block; 424. Adjustment seat; 425. Adjustment component; 43. Lifting assembly; 431. Fixing base block; 432. Lifting block; 433. Lifting motor; 434. Lifting screw; 44. Impact assembly; 441. Impact block; 4411. Limiting groove; 442. Impact frame; 4421. Connecting frame; 443. Adjustment motor; 444. Drive gear; 445. Driven gear; 4451. Rotating ring; 446. Adjusting screw; 447. Movable slider; 4471. Limiting block; 448. Puncture needle. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1 to 11 A new energy lithium battery impact testing device includes a base 10, a frame 11 mounted on the base 10, and a test guide rod 12. It also includes a lifting mechanism 20 mounted on the base 10 and a test mechanism 30 slidably mounted on the test guide rod 12. The test mechanism 30 includes a test plate 31, a test seat 32 fixed to the bottom of the test plate 31, and a test block 33 for planar impact testing of the lithium battery fixed to the bottom of the test seat 32. The test seat 32 and the test block 33 share an internal cavity, within which an impact mechanism 40 is housed. The impact mechanism 40 includes a drive assembly 41, an adjustment assembly 42 connected to the drive assembly 41, and a lifting mechanism 20 mounted on the test guide rod 12. The adjustment assembly 42 includes a lifting assembly 43 and an impact assembly 44 mounted on the lifting assembly 43. The impact assembly 44 includes an impact block 441 for performing point impact on the lithium battery and a puncture needle 448 for performing puncture impact on the lithium battery. The drive assembly 41 is used to drive the adjustment assembly 42 to achieve impact point switching adjustment. The lifting assembly 43 is used to drive the impact assembly 44 to move vertically downward, so that the impact block 441 completes the point impact test on the lithium battery. At the same time, the impact assembly 44 can extend the puncture needle 448 to complete the puncture impact test on the lithium battery. The independent switching of the three modes of planar impact, point impact and puncture impact can be achieved by switching the work position.

[0025] By incorporating a horizontally adjustable adjustment component 42, a vertically extendable lifting component 43, and an impact component 44 integrating an impact block 441 and a puncture needle 448 within the test holder 32, the device can freely switch between three modes: planar impact, point impact, and puncture impact. Without disassembling or replacing any tooling components, it can complete overall impact, local fixed-point impact, and puncture tests on lithium batteries. This accurately detects the battery's impact resistance, structural strength, response characteristics and failure patterns under single-point stress, as well as safety performance such as internal short circuits and thermal runaway under puncture conditions, meeting diverse and comprehensive lithium battery safety performance testing needs.

[0026] Please see Figures 4 to 5The lifting mechanism 20 includes a lifting assembly 21, which includes a fixed plate 211 fixed to one side of the base 10. A lifting motor 212 is mounted on the upper side of the fixed plate 211. A take-up reel 213 is fixedly connected to the output end of the lifting motor 212. A wire rope 214 is installed inside the take-up reel 213. By starting the lifting motor 212, the output end of the lifting motor 212 drives the take-up reel 213 to rotate, and the take-up reel 213 winds up the wire rope 214. As the take-up reel 213 continues to wind up, the wire rope 214 can pull the guide plate 221 to move.

[0027] Please see Figure 3 , Figure 6 The lifting mechanism 20 also includes an electromagnetic adsorption component 22, which includes a guide plate 221 slidably mounted on the test guide rod 12. An electromagnet block 222 is fixedly installed at the bottom of the guide plate 221, and the upper side of the guide plate 221 is fixedly connected to the steel wire rope 214. By energizing the electromagnet block 222, the electromagnet block 222 generates magnetic force and forms a magnetic adsorption fixation on the test plate 31. When a planar impact test is required on the lithium battery, the electromagnet block 222 is de-energized. After the electromagnet block 222 is de-energized, it loses its magnetic adsorption on the test plate 31, and the test plate 31 and the test seat 32 drive the test block 33 to fall freely under their own gravity.

[0028] Please see Figures 1 to 2 , Figure 5 The lifting mechanism 20 also includes a guide roller 23 fixed on the frame 11. The guide roller 23 is adapted to cooperate with the wire rope 214 to realize the guiding and limiting transmission of the wire rope 214. The guide roller 23 can pull the guide plate 221 to move under the guiding and limiting action of the guide roller 23.

[0029] Please see Figures 6 to 8 A guide sleeve 311 is fixedly installed on the test plate 31. The guide sleeve 311 is slidably assembled on the test guide rod 12. The bottom of the test block 33 has three opening slots 331. When the test plate 31 moves, the guide sleeve 311 slides along the test guide rod 12. Through the sliding guidance of the guide sleeve 311 and the test guide rod 12, the stability and coaxiality of the test plate 31, test seat 32 and test block 33 during the lifting process are effectively improved, and shaking or tilting during the lifting process is effectively avoided, ensuring that the subsequent impact position is accurate and reliable.

[0030] Please see Figures 9 to 10The drive assembly 41 includes a fixed frame 411 fixed to the inner wall of the test base 32. A drive motor 412 is mounted on one side of the fixed frame 411. The output end of the drive motor 412 is fixedly connected to a drive turntable 413. A drive rod 414 is movably mounted on the drive turntable 413. By starting the drive motor 412, the output end of the drive motor 412 drives the drive turntable 413 to rotate slowly. While the drive turntable 413 is rotating, it drives the drive rod 414 to move. The moving drive rod 414 drives the adjusting component 425 to move left and right.

[0031] Please see Figures 9 to 10 The adjustment assembly 42 includes an adjustment frame 421 fixed to the inner wall of the test seat 32. A fixed guide rail 422 is fixedly installed on the adjustment frame 421. A movable guide block 423 is slidably installed on the fixed guide rail 422. An adjustment seat 424 is fixedly installed on the movable guide block 423. An adjustment component 425 is fixedly installed on the adjustment seat 424. The end of the drive rod 414 away from the drive turntable 413 is movably connected to the adjustment component 425. As the adjustment component 425 moves, it drives the adjustment seat 424 and the movable guide block 423 to slide on the fixed guide rail 422. By controlling the rotation angle of the drive turntable 413, the drive rod 414 can move the adjustment seat 424 to a specified position, and align the impact block 441 with the corresponding opening slot 331 on the test block 33. This allows for flexible adjustment of the impact point. This setting enables the impact position to be switched freely according to test requirements, allowing for directional point impact tests on different points such as the center and corners of the lithium battery. This effectively solves the problems of traditional devices being unable to adjust the impact position and having limited test coverage, greatly enriching the test conditions and improving the comprehensiveness of the test data.

[0032] Please see Figures 9 to 10 The lifting assembly 43 includes a fixed base block 431 fixed on the adjusting seat 424 and a lifting block 432 slidably mounted on the adjusting seat 424. A lifting motor 433 is mounted on the fixed base block 431. A lifting screw 434 is fixedly connected to the output end of the lifting motor 433. The lifting screw 434 and the lifting block 432 are engaged by a threaded connection. By starting the lifting motor 433, the output end of the lifting motor 433 drives the lifting screw 434 to rotate, thereby causing the lifting screw 434 and the lifting block 432 to engage with each other by a threaded connection, pushing the lifting block 432 to slide downward along the adjusting seat 424. At the same time as the lifting block 432 moves downward, the impact frame 442 drives the impact block 441 to move downward synchronously, and the lower end of the impact block 441 extends out of the bottom of the test block 33. When the impact block 441 extends downward to a set length, the lifting motor 433 stops running.

[0033] Please see Figures 9 to 11The impact assembly 44 includes an impact frame 442 fixed on the lifting block 432. One side of the impact frame 442 is fixedly connected to the impact block 441, and a connecting frame 4421 is fixedly installed on the other side of the impact frame 442. An adjusting motor 443 is fixedly mounted on the connecting frame 4421. A drive gear 444 is fixedly connected to the output end of the adjusting motor 443. A driven gear 445 is meshed with one side of the drive gear 444. The driven gear 445 is rotatably mounted on the impact block 441 through a rotating ring 4451. By starting the adjusting motor 443, the output end of the adjusting motor 443 drives the drive gear 444 to rotate. The drive gear 444 and the driven gear 445 mesh to achieve transmission. During the rotation of the driven gear 445, it forms a threaded engagement with the adjusting screw 446, thereby driving the adjusting screw 446 to move downward.

[0034] Please see Figures 9 to 11 The impact block 441 has an internal cavity. An adjusting screw 446 is threadedly connected to the middle of the driven gear 445. The lower end of the adjusting screw 446 extends into the internal cavity of the impact block 441 and is fixedly connected to the movable slider 447. The bottom of the movable slider 447 is fixedly connected to the top of the puncture needle 448. A limiting groove 4411 is formed on the wall of the internal cavity of the impact block 441. A limiting block 4471 is fixedly installed on the outer side of the movable slider 447, and the limiting block 4471 is located in the limiting groove 4411. During the downward movement of the adjusting screw 446, the movable slider 447 moves smoothly within the internal cavity of the impact block 441. Simultaneously, the movable slider 447 pushes the puncture needle 448 downward, causing the lower end of the puncture needle 448 to extend beyond the impact block. At the bottom of the striking block 441, when the puncture needle 448 extends to the set length, the adjusting motor 443 stops running. At the same time, a limiting block 4471 is set on the outside of the movable slider 447. When the movable slider 447 moves down, it drives the limiting block 4471 to move synchronously and slide in the limiting groove 4411. This structure can effectively constrain the movement direction of the movable slider 447 and the puncture needle 448, improve the smoothness and coaxiality of the extension and retraction process of the puncture needle 448, and avoid skewing and shaking. On the other hand, it can limit the synchronous rotation of the adjusting screw 446 with the driven gear 445, ensuring that the adjusting screw 446 only makes axial linear movement, ensuring that the extension position of the puncture needle 448 is accurate and the stroke is stable and reliable.

[0035] Working principle: First, the electromagnet block 222 is energized, which generates magnetic force and magnetically attracts and fixes the test plate 31. Then, the lifting motor 212 is started, and the output end of the lifting motor 212 drives the take-up reel 213 to rotate. The take-up reel 213 winds up the wire rope 214. As the take-up reel 213 continues to wind up, the wire rope 214 is pulled upward by the guide roller 23. During the upward movement of the guide plate 221, the electromagnet block 222 synchronously drives the test plate 31 to rise. When the test plate 31 moves upward, the guide sleeve 311 slides along the test guide rod 12. Through the sliding guidance of the guide sleeve 311 and the test guide rod 12, the stability and coaxiality of the lifting process of the test plate 31, test seat 32 and test block 33 are effectively improved, effectively avoiding shaking and tilting during the lifting process, and ensuring accurate and reliable impact position. Once the test block 33 is raised to the set height, the lifting motor 212 stops operating. At this time, the lithium battery to be tested is placed on the base 10 and directly below the test block 33, completing the pre-test preparation. This setting enables precise adjustment and stable lifting of the impact mechanism 40, ensuring that the impact mechanism 40 is released at a specified height, guaranteeing the consistency and repeatability of the impact force and impact height. At the same time, the guide and limit structure improves the overall motion accuracy, providing a stable and reliable motion foundation for subsequent planar impact, single-point impact, and puncture impact tests, effectively improving the accuracy of test data and the safety of device operation. Furthermore, this device has three impact modes. When a planar impact test is required on the lithium battery, the electromagnet block 222 is de-energized. After the electromagnet block 222 is de-energized, it loses its magnetic attraction to the test plate 31. Under its own gravity, the test plate 31 and the test base 32 drive the test block 33 to fall freely. The falling test block 33 is used to perform a planar impact test on the lithium battery. After the impact is completed, the relevant test data is recorded in real time. This setting can realize a planar impact test on the lithium battery, which can realistically simulate the working condition of the battery being impacted by heavy objects in actual use. It can accurately detect the impact resistance and structural strength of the battery's overall structure. At the same time, the free fall impact method ensures that the impact process is only affected by gravity. The impact force is stable and controllable, the test repeatability is high, and the authenticity and reliability of the planar impact test data are effectively improved. When a point impact test is required on a lithium battery, the drive motor 412 is started. The output of the drive motor 412 drives the drive turntable 413 to rotate slowly. As the drive turntable 413 rotates, it drives the drive rod 414 to move. The moving drive rod 414 drives the adjusting component 425 to move left and right. As the adjusting component 425 moves, it drives the adjusting seat 424 and the movable guide block 423 to slide on the fixed guide rail 422. By controlling the rotation angle of the drive turntable 413, the drive rod 414 can drive the adjusting seat 424 to the designated position, and the impact block 441 is aligned with the corresponding opening slot 331 on the test block 33. This allows for flexible adjustment of the impact point. This setting allows for free switching of the impact position according to the test requirements. It enables directional point impact tests on different points such as the center and corner areas of the lithium battery, effectively solving the problems of traditional devices being unable to adjust the impact position and having limited test coverage. This greatly enriches the test conditions and improves the comprehensiveness of the test data. At this point, the lifting motor 433 is restarted, and its output drives the lifting screw 434 to rotate. This causes the lifting screw 434 to engage with the lifting block 432 via a threaded connection, pushing the lifting block 432 downward along the adjusting seat 424. Simultaneously, the impact block 432 moves downward, causing the impact frame 442 to drive the impact block 441 downward, extending its lower end beyond the bottom of the test block 33. Once the impact block 441 extends to the set length, the lifting motor 433 stops. After the impact block 441 is adjusted, the electromagnet block 222 is de-energized. After power failure, the magnetic attraction to the test board 31 is lost. Under its own gravity, the test board 31 and test base 32 drive the test block 33 to fall freely. The falling test block 33 drives the impact block 441 to perform a fixed-point impact test on the lithium battery. After the impact is completed, the relevant test data is recorded in real time. This setting can realize the precise point impact test of the lithium battery, which can simulate the real working condition of the battery being impacted by a sharp heavy object in a local area. It can accurately obtain the response characteristics and failure law of the battery under single-point force. The test accuracy is high and the positioning is accurate. The point impact mode can be switched without changing the tooling. The operation is simple and the test efficiency is high. When a puncture impact test is required on the lithium battery, the regulating motor 443 is activated. The output of the regulating motor 443 drives the drive gear 444 to rotate. The drive gear 444 meshes with the driven gear 445 to achieve transmission. During the rotation of the driven gear 445, it forms a threaded engagement with the regulating screw 446, thereby driving the regulating screw 446 to move downward. During the downward movement of the regulating screw 446, it pushes the movable slider 447 to move smoothly in the inner cavity of the impact block 441. At the same time, the movable slider 447 synchronously pushes the puncture needle 448 downward to extend it, so that the lower end of the puncture needle 448 extends to the outside of the bottom of the impact block 441. When the puncture needle 448 extends to the set length... Afterwards, the adjusting motor 443 stops running. At the same time, by setting a limiting block 4471 on the outside of the movable slider 447, the movable slider 447 moves down and drives the limiting block 4471 to move synchronously, and the limiting block 4471 slides in the limiting groove 4411. This structure can effectively constrain the movement direction of the movable slider 447 and the puncture needle 448, improve the smoothness and coaxiality of the extension and retraction process of the puncture needle 448, and avoid skewing and shaking. On the other hand, it can limit the synchronous rotation of the adjusting screw 446 with the driven gear 445, ensure that the adjusting screw 446 only makes axial linear movement, and ensure that the extension position of the puncture needle 448 is accurate and the stroke is stable and reliable. After the position of the puncture needle 448 is adjusted, the electromagnet block 222 is de-energized. After the electromagnet block 222 is de-energized, it loses its magnetic attraction to the test plate 31. Under its own gravity, the test plate 31 and the test seat 32 drive the test block 33 to fall freely. The falling test block 33 drives the puncture needle 448 to perform a puncture impact test on the lithium battery. After the impact, the relevant test data is recorded in real time. With this setting, the puncture impact test mode can be quickly switched without changing the tooling or disassembling the parts. It can realistically simulate the extreme working condition of the lithium battery being punctured by a sharp object, accurately detect the internal short circuit, thermal runaway and other safety performance of the battery under puncture conditions. At the same time, combined with the aforementioned planar impact and point impact modes, a single device integrates three test functions, greatly simplifying the operation process, improving test efficiency, broadening the scope of test application, and meeting the diverse and comprehensive lithium battery safety performance test needs.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A new energy lithium battery impact testing device, comprising a base (10), a frame (11) disposed on the base (10), and a test guide rod (12), characterized in that: It also includes a lifting mechanism (20) mounted on the base (10) and a test mechanism (30) slidably mounted on the test guide rod (12). The testing mechanism (30) includes a test plate (31), a test seat (32) is fixed to the bottom of the test plate (31), and a test block (33) for impacting the lithium battery is fixed to the bottom of the test seat (32). The test seat (32) and the test block (33) have an internal cavity. An impact mechanism (40) is built into the internal cavity. The impact mechanism (40) includes a drive assembly (41), an adjustment assembly (42) connected to the drive assembly (41), a lifting assembly (43) mounted on the adjustment assembly (42), and an impact assembly (44) mounted on the lifting assembly (43). The impact assembly (44) includes an impact block (441) for point impact on the lithium battery and a puncture needle (448) for puncture impact on the lithium battery. The drive component (41) is used to drive the adjustment component (42) to achieve the switching adjustment of the impact point. The lifting component (43) is used to drive the impact component (44) to move vertically downward, so that the impact block (441) completes the point impact test on the lithium battery. At the same time, the impact component (44) can extend the puncture needle (448) and complete the puncture impact test on the lithium battery. The independent switching of the three modes of planar impact, point impact and puncture impact can be achieved by switching the work station.

2. The new energy lithium battery impact testing device according to claim 1, characterized in that: The lifting mechanism (20) includes a lifting assembly (21), which includes a fixing plate (211) fixed to one side of the base (10). A lifting motor (212) is mounted on the upper side of the fixing plate (211), and a take-up reel (213) is fixedly connected to the output end of the lifting motor (212). A wire rope (214) is provided inside the take-up reel (213).

3. The new energy lithium battery impact testing device according to claim 2, characterized in that: The lifting mechanism (20) also includes an electromagnetic adsorption assembly (22), which includes a guide plate (221) slidably mounted on the test guide rod (12). An electromagnet block (222) is fixedly installed at the bottom of the guide plate (221), and the upper side of the guide plate (221) is fixedly connected to the wire rope (214).

4. The new energy lithium battery impact testing device according to claim 2, characterized in that: The lifting mechanism (20) also includes a guide roller (23) fixed on the frame (11). The guide roller (23) is adapted to cooperate with the wire rope (214) to realize the guiding and limiting transmission of the wire rope (214).

5. The new energy lithium battery impact testing device according to claim 1, characterized in that: A guide sleeve (311) is fixedly installed on the test plate (31), and the guide sleeve (311) is slidably assembled on the test guide rod (12). The bottom of the test block (33) has three opening slots (331).

6. The new energy lithium battery impact testing device according to claim 1, characterized in that: The drive assembly (41) includes a fixed frame (411) fixed on the inner wall of the test seat (32), a drive motor (412) is mounted on one side of the fixed frame (411), a drive turntable (413) is fixedly connected to the output end of the drive motor (412), and a drive rod (414) is movably mounted on the drive turntable (413).

7. The new energy lithium battery impact testing device according to claim 6, characterized in that: The adjustment assembly (42) includes an adjustment frame (421) fixed to the inner wall of the test seat (32), a fixed guide rail (422) fixedly installed on the adjustment frame (421), a movable guide block (423) slidably installed on the fixed guide rail (422), an adjustment seat (424) fixedly installed on the movable guide block (423), and an adjustment component (425) fixedly installed on the adjustment seat (424). The end of the drive rod (414) away from the drive turntable (413) is movably connected to the adjusting member (425).

8. The new energy lithium battery impact testing device according to claim 7, characterized in that: The lifting assembly (43) includes a fixed base block (431) fixed on the adjusting seat (424) and a lifting block (432) slidably mounted on the adjusting seat (424). A lifting motor (433) is mounted on the fixed base block (431). A lifting screw (434) is fixedly connected to the output end of the lifting motor (433). The lifting screw (434) and the lifting block (432) are engaged by threaded screws.

9. The new energy lithium battery impact testing device according to claim 8, characterized in that: The impact assembly (44) includes an impact frame (442) fixed on the lifting block (432). One side of the impact frame (442) is fixedly connected to the impact block (441), and a connecting frame (4421) is fixedly installed on the other side of the impact frame (442). An adjusting motor (443) is fixedly installed on the connecting frame (4421). A drive gear (444) is fixedly connected to the output end of the adjusting motor (443). A driven gear (445) is meshed on one side of the drive gear (444). The driven gear (445) is rotatably mounted on the impact block (441) through a rotating ring (4451).

10. A new energy lithium battery impact testing device according to claim 9, characterized in that: The impact block (441) has an internal cavity. The driven gear (445) is threadedly connected to an adjusting screw (446) in the middle. The lower end of the adjusting screw (446) extends into the internal cavity of the impact block (441) and is fixedly connected to the movable slider (447). The bottom of the movable slider (447) is fixedly connected to the top of the puncture needle (448). A limiting groove (4411) is provided on the inner cavity wall of the impact block (441), and a limiting block (4471) is fixedly installed on the outer side of the movable slider (447), and the limiting block (4471) is located in the limiting groove (4411).

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