Lithium battery safety performance testing device

Abstract

A lithium battery safety performance testing device disclosed by the present invention comprises a rack, an energy charging detection module and an environment monitoring module, the energy charging detection module comprises a first driving assembly, clamping assemblies and an energy charging assembly, the first driving assembly is horizontally arranged in the middle of the rack, the two ends of the first driving assembly are respectively connected with the two clamping assemblies, and the energy charging assembly is arranged in the middle of the rack. The two energy charging assemblies are arranged on the two opposite side faces of the two clamping assemblies correspondingly. The environment monitoring module comprises a second driving assembly, sealing assemblies and puncturing assemblies, the second driving assembly is vertically arranged on the rack, the two ends of the second driving assembly are connected with the two sealing assemblies respectively, and the two puncturing assemblies are arranged in the two sealing assemblies respectively. Through the arrangement, the test efficiency and the test precision can be remarkably improved.

Description

Technical Field

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

[0002] A lithium battery safety performance testing device is a special equipment for systematically evaluating the safety performance of lithium-ion batteries. However, most of the existing lithium battery safety performance testing devices adopt a split-module design, that is, they are divided into independent charging energy testing devices, puncture testing devices, environmental monitoring devices and other modules according to the content included in the lithium battery safety performance testing. When conducting lithium battery safety performance testing, it is necessary to manually transfer the battery between the devices of different modules, resulting in a fragmented test process, making it difficult to establish the failure mechanism correlation under multi-stress coupling and having low test efficiency. At the same time, this device can only apply a single stress condition and cannot reproduce the real accident scenario where the battery is mechanically impacted when it expands due to heat, resulting in a deviation between the experimental data and the actual application and affecting the test results.

[0003] The above-mentioned status quo of the existing technology has led to a significant deviation between the lithium battery safety performance test results and the actual safety performance, making it difficult to meet the accurate assessment requirements of the power battery safety performance and becoming an important technical bottleneck restricting the industrialization of high-energy density battery technology. Summary of the Invention

[0004] The purpose of the present invention is to provide a lithium battery safety performance testing device to solve the technical problems of low test efficiency and low test accuracy caused by the split-module design of the existing lithium battery safety performance testing device.

[0005] To achieve the above technical purpose, the present invention adopts the following technical solutions: A lithium battery safety performance testing device, comprising: A frame; A charging energy detection module, including a first driving component, a clamping component and a charging energy component. The first driving component is horizontally arranged in the middle of the frame, both ends of the first driving component are respectively connected to the two clamping components, the two charging energy components are respectively arranged on two opposite sides of the two clamping components, and the two clamping components move relatively under the drive of the first driving component to clamp the battery to be tested and perform charging energy. An environmental monitoring module, including a second driving component, a sealing component and a puncture component. The second driving component is vertically arranged on the frame, both ends of the second driving component are respectively connected to the two sealing components, the two puncture components are respectively arranged inside the two sealing components, and the two sealing components move relatively under the drive of the second driving component to puncture the battery to be tested.

[0006] In some embodiments, the charging detection module further includes a first buffer component, and two first buffer components are respectively disposed inside the two clamping components to ensure that the electrodes of the battery to be tested are in full contact with the charging component.

[0007] In some embodiments, the environment monitoring module further includes a second buffer component, and two second buffer components are respectively disposed inside the two puncture components to ensure smooth puncture of the battery to be tested.

[0008] In some embodiments, the environmental monitoring module also includes a third driving component, two of the third driving components are respectively arranged inside the two sealing components and are respectively connected to the two puncture components in transmission, and each of the puncture components moves horizontally along the puncture surface of the battery to be tested under the drive of the corresponding third driving component.

[0009] In some embodiments, the rack includes a base plate, a support column and a mounting seat, the bottom of the support column is fixed to the base plate, and the mounting seat is fixed to a side surface of the support column.

[0010] The mounting base is composed of an integrally formed mounting plate and side plates, the middle of one side of the mounting plate is fixedly mounted on the support column, the two side plates are arranged in the middle of the two ends of the mounting plate, the two ends of the first driving component are respectively fixed to the two side plates, and the two ends of the second driving component are respectively fixed to the upper and lower ends of the mounting plate.

[0011] In some embodiments, the first drive assembly includes a connecting frame, a synchronous motor, a first bidirectional screw motor and a first slider, the two connecting frames are respectively mounted on the two side plates, the two synchronous motors are respectively arranged on one side of the two connecting frames, one end of the two first bidirectional screw motors are arranged on the other side of one of the connecting frames and are connected to the synchronous motor on this side through a coupling, the other end of the two first bidirectional screw motors are arranged on the other side of the other connecting frame and are connected to the synchronous motor on this side through a coupling, the four first sliders are respectively cooperated and connected with the two first bidirectional screw motors, and the two sides of the clamping assembly are respectively fixedly connected to the first sliders.

[0012] In some embodiments, the clamping assembly includes an inner frame and an outer frame that are connected to each other, the outer frame is connected to the first driving assembly, the charging assembly includes a plurality of joints arranged on the outside of the inner frame, the first buffer assembly includes a plurality of first dampers arranged on the side of the inner frame away from the joints, and a first elastic member is sleeved on the outside of the first damper.

[0013] In some embodiments, the second driving assembly includes a second bidirectional lead screw motor, second sliders, limiting blocks and limiting rods. The mounting plate is provided with a sliding groove and limiting grooves in the vertical direction. The two limiting grooves are respectively located on both sides of the sliding groove. The two second sliders are slidably arranged in the sliding groove and are adapted to the second bidirectional lead screw motor. The four limiting blocks are respectively slidably arranged in the limiting grooves and sleeved outside the two limiting rods. The second slider and the two limiting blocks on the same side are jointly fixed to the sealing assembly on that side.

[0014] In some embodiments, the sealing assembly includes a first box body and a second box body with a communicated internal space. The outer wall of the first box body is connected to the second driving assembly. The side wall of the second box body is provided with heat dissipation grilles. The third driving assembly includes a unidirectional lead screw motor and guide rods. The unidirectional lead screw motor is installed on one inner wall of the second box body. The two guide rods are arranged on this inner wall of the second box body and on both sides of the unidirectional lead screw motor. The puncturing assembly includes a sliding plate, a top plate and a needle. The second buffering assembly includes a second damper and a second elastic member. The sliding plate is sleeved outside the unidirectional lead screw motor and the two guide rods. The two ends of the second damper are respectively connected to the sliding plate and the top plate. The second elastic member is sleeved outside the second damper. The needle is arranged at one end of the top plate away from the sliding plate.

[0015] In some embodiments, the environmental monitoring module further includes a heating assembly, a fire protection assembly and an image monitoring assembly. The heating assembly, the fire protection assembly and the image monitoring assembly are respectively arranged in the two sealing assemblies.

[0016] Compared with the prior art, the beneficial effects of the present invention mainly include: The lithium battery safety performance testing device provided by the present invention integrates the energy charging detection module and the environmental monitoring module on the same frame, realizing that all the contents included in the lithium battery safety performance test can be completed on one device. The test process is complete and there is no need for manual transfer of the battery between different modules, so the test efficiency is improved. At the same time, the energy charging detection module includes a first driving assembly, a clamping assembly and an energy charging assembly, and the environmental monitoring module includes a second driving assembly, a sealing assembly and a puncturing assembly. Then, the present invention can apply multiple stress conditions simultaneously, enabling the testing device of the present invention to maximize the simulation of the real accident scenario of the mechanical impact suffered by the battery during thermal expansion, reducing the deviation between the experimental data and the actual application data, and thus improving the test accuracy. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the testing device of the present invention; Figure 2is another overall structural schematic diagram of the test device described in the present invention; Figure 3 is the overall structural schematic diagram of the measuring device described in the present invention after removing the frame; Figure 4 is the structural schematic diagram of the energy charging detection module described in the present invention; Figure 5 is the structural schematic diagram of the first buffer assembly and the energy charging assembly installed on the clamping assembly described in the present invention; Figure 6 is the structural schematic diagram of the environmental monitoring module located on the upper part of the frame in the present invention Figure 7 is a partial structural schematic diagram of the environmental monitoring module located on the lower part of the frame in the present invention; Figure 8 is the structural schematic diagram of the fire protection component described in the present invention.

[0018] Explanation of reference numerals: 100, frame, 110, bottom plate, 120, support column, 130, mounting seat, 131, mounting plate, 132, side plate; 200, energy charging detection module, 210, first driving component, 211, connecting frame, 212, synchronous motor, 213, first bidirectional lead screw motor, 214, first slider, 220, clamping component, 221, inner frame, 222, outer frame, 230, energy charging component, 240, first buffer component, 241, first damper, 242, first elastic member; 300, environmental monitoring module, 310, second driving component, 311, second bidirectional lead screw motor, 312, second slider, 313, limiting block, 314, limiting rod, 320, sealing component, 321, first box body, 322, second box body, 3221, heat dissipation grille, 330, puncturing component, 331, sliding plate, 332, top plate, 333, needle, 334, semi-circular top block, 340, second buffer component, 341, second damper, 342, second elastic member, 350, third driving component, 351, unidirectional lead screw motor, 352, guiding rod, 360, heating component, 370, fire protection component, 371, driving motor, 372, transmission shaft, 373, driving gear, 374, driven gear, 375, synchronous belt, 376, nozzle, 377, water delivery pipeline, 378, water tank, 379, water pump, 380, image monitoring component. Detailed implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] In view of the technical problems that the existing lithium battery safety performance testing device is a separate module, and it is often necessary to manually transfer the battery between various modules, resulting in low testing efficiency, and it is impossible to apply multiple stress conditions simultaneously to simulate the real scenario of the lithium battery suffering mechanical shock during thermal expansion, resulting in a deviation between the test data and the actual data, the present invention provides a lithium battery safety performance testing device, which can improve the testing efficiency and testing accuracy.

[0021] As Figures 1 - 3 shown, the present invention provides a lithium battery safety performance testing device, including a frame 100, a charging and detecting module 200 and an environment monitoring module 300. The charging and detecting module 200 includes a first driving component 210, a clamping component 220 and a charging component 230. The first driving component 210 is horizontally arranged in the middle of the frame 100, and both ends of the first driving component 210 are respectively connected to the two clamping components 220. The two charging components 230 are respectively arranged on two opposite sides of the two clamping components 220. The two clamping components 220 move relatively under the drive of the first driving component 210 to clamp the battery to be tested and charge it. The environment monitoring module 300 includes a second driving component 310, a sealing component 320 and a puncturing component 330. The second driving component 310 is vertically arranged on the frame 100, and both ends of the second driving component 310 are respectively connected to the two sealing components 320. The two puncturing components 330 are respectively arranged inside the two sealing components 320. The two sealing components 320 move relatively under the drive of the second driving component 310 to puncture the battery to be tested.

[0022] The lithium battery safety performance testing device provided by the present invention integrates the charging and detecting module 200 and the environment monitoring module 300 on a frame 100 to form an integrated testing device, realizing all the contents included in the lithium battery safety performance testing on one device. The testing process is complete, and there is no need to manually transfer the battery between different modules, improving the testing efficiency. At the same time, the charging and detecting module 200 of the present invention includes a first driving component 210, a clamping component 220 and a charging component 230, and the environment monitoring module 300 includes a second driving component 310, a sealing component 320 and a puncturing component 330. Then the present invention can apply multiple stress conditions simultaneously, enabling the testing device of the present invention to simulate the real accident scenario of the battery suffering mechanical shock during thermal expansion to the greatest extent, reducing the deviation between the experimental data and the actual application data, and further improving the testing accuracy.

[0023] In practical applications, in order to ensure the reliability of electrode contact, prevent electrode damage, and ensure a smooth and controllable puncture process, the charging detection module 200 also includes a first buffer component 240, and the two first buffer components 240 are respectively arranged inside the two clamping components 220; the environmental monitoring module 300 also includes a second buffer component 340, and the two second buffer components 340 are respectively arranged inside the two puncture components 330.

[0024] At the same time, in order to realize the battery puncture process, the environmental monitoring module 300 also includes a third driving component 350. The two third driving components 350 are respectively arranged inside the two sealing components 320 and are respectively connected to the two puncture components 330. Each puncture component 330 moves horizontally along the puncture surface of the battery to be tested under the drive of the corresponding third driving component 350 to puncture the required part of the battery.

[0025] The various components of the lithium battery safety performance testing device provided by the present invention are described in detail below.

[0026] In one embodiment, the frame 100 includes a base plate 110, a support column 120 and a mounting seat 130, the bottom of the support column 120 is fixed on the base plate 110, and the mounting seat 130 is fixed on a side surface of the support column 120. Further, the mounting seat 130 is composed of an integrally formed mounting plate 131 and a side plate 132, the middle of one side of the mounting plate 131 is fixed to the support column 120 by screws, and the two side plates 132 are arranged in the middle of the two ends of the mounting plate 131, the two ends of the first drive component 210 are respectively fixed to the two side plates 132, and the two ends of the second drive component 310 are respectively fixed to the upper and lower ends of the mounting plate 131.

[0027] In the above technical solution, by installing the charging detection module 200 on the side panel 132 and installing the environmental monitoring module 300 on the mounting plate 131, a high degree of integration of the equipment required for the lithium battery safety performance test is achieved, so that part of the test process can be carried out simultaneously, thereby improving the test efficiency and test accuracy.

[0028] In one embodiment, if Figure 4As shown in the figure, the first driving component 210 includes a connecting frame 211, a synchronous motor 212, a first bidirectional lead screw motor 213 and a first slider 214. The two connecting frames 211 are respectively installed on the two side plates 132. The two synchronous motors 212 are respectively arranged on one side of the two connecting frames 211. One end of the two first bidirectional lead screw motors 213 is arranged on the other side of one of the connecting frames 211 and is connected to the synchronous motor 212 on this side through a coupling. The other end of the two first bidirectional lead screw motors 213 is arranged on the other side of the other connecting frame 211 and is connected to the synchronous motor 212 on this side through a coupling. The four first sliders 214 are respectively connected to the two first bidirectional lead screw motors 213 in a matching manner, and both sides of the clamping component 220 are fixedly connected to the first sliders 214.

[0029] In the above technical solution, the two first bidirectional lead screw motors 213 can drive the two first sliders 214 arranged thereon to move relatively or away from each other, thereby driving the two clamping components 220 to move relatively or away from each other to clamp or release the battery, and the position can be adjusted according to the sizes of different lithium batteries; the setting of the two synchronous motors 212 can enable the two first bidirectional lead screw motors 213 to perform synchronous movement to ensure the synchronous movement of the two clamping components 220.

[0030] In one embodiment, as Figure 5 shown, the clamping component 220 includes a nested inner frame 221 and an outer frame 222. The outer frame 222 is connected to the first driving component 210, specifically fixedly connected to the first slider 214. The charging component 230 includes a plurality of connectors arranged on the outer side of the inner frame 221. The first buffer component 240 includes a plurality of first dampers 241 and first elastic members 242 arranged on the side of the inner frame 221 away from the connectors. The first elastic member 242 is sleeved outside the first damper 241.

[0031] In the above technical solution, the outer frame 222 moves driven by the first slider 214, and then drives the inner frame 221 to move. After clamping the lithium battery, the connectors are in contact with the electrodes of the lithium battery for charging and discharging; a pre-pressure is maintained between the inner frame 221 and the outer frame 222 through the first elastic member 242, so that the connectors maintain a constant contact pressure with the electrodes. The first damper 241 can effectively absorb the impact caused by clamping the lithium battery and prevent damage to the electrodes of the battery.

[0032] In one embodiment, in combination with Figure 3As shown, the second driving assembly 310 includes a second bidirectional lead screw motor 311, second sliders 312, limit blocks 313 and limit rods 314. The mounting plate 131 is provided with a chute and limit grooves in the vertical direction. The two limit grooves are respectively located on both sides of the chute. The two second sliders 312 are slidably arranged in the chute and are adapted to the second bidirectional lead screw motor 311. The four limit blocks 313 are respectively slidably arranged in the limit grooves and are respectively sleeved outside the two limit rods 314. The second slider 312 and the two limit blocks 313 on the same side are jointly fixed on the sealing assembly 320 on this side.

[0033] In the above technical solution, the second bidirectional lead screw motor 311 can drive the two second sliders 312 to move relatively or away from each other, and then drive the two sealing assemblies 320 to close and separate. After closing, the energy charging detection module 200 is wrapped therein to form a sealed space, providing a sealed environment for high-temperature or puncture tests, which is beneficial to simulating the environment of lithium batteries in actual accident scenarios; and during the movement of the two sealing assemblies 320, the sliding of the limit blocks 313 on the limit rods 314 helps the second sliders 312 to slide on the second bidirectional lead screw motor 311.

[0034] In one embodiment, as Figure 6 and Figure 7 shown, the sealing assembly 320 includes a first box body 321 and a second box body 322 with interconnected internal spaces. The outer wall of the first box body 321 is connected to the second driving assembly 310, specifically fixed to the second sliders 312 and the limit blocks 313. The side wall of the second box body 322 is provided with heat dissipation grilles 3221. The third driving assembly 350 includes a unidirectional lead screw motor 351 and a guide rod 352. The unidirectional lead screw motor 351 is installed on one inner wall of the second box body 322. The two guide rods 352 are arranged on this inner wall of the second box body 322 and are located on both sides of the unidirectional lead screw motor 351. The puncture assembly 330 includes a sliding plate 331, a top plate 332 and a needle 333. The second buffer assembly 340 includes a second damper 341 and a second elastic member 342. The sliding plate 331 is sleeved outside the unidirectional lead screw motor 351 and the two guide rods 352. The two ends of the second damper 341 are respectively connected to the sliding plate 331 and the top plate 332. The second elastic member 342 is sleeved outside the second damper 341. The needle 333 is arranged at one end of the top plate 332 away from the sliding plate 331.

[0035] In the above technical solution, the one-way lead screw motor 352 can drive the sliding plate 331 to reciprocate on the guide rod 352, and then drive the top plate 332 and the needle 333 to move to puncture the required part of the lithium battery; further, semi-circular top blocks 334 are provided on both sides of the inner wall of the second box body 322. When the one-way lead screw motor 351 drives the sliding plate 331 to move, both ends of the sliding plate 331 contact the semi-circular top blocks 334 on both sides to squeeze the sliding plate 331, then the sliding plate 331 squeezes the second elastic member 342, and then squeezes the top plate 332, so that the needle 333 is pushed into the battery to realize the puncture test of the battery. Further, the needle 333 is designed to be conical to facilitate piercing the battery, and a liquid discharge groove is formed on its surface to discharge internal gas or liquid during piercing to prevent pressure accumulation, and the second damper 341 can assist in absorbing the instantaneous impact force during the piercing process.

[0036] Further, semi-circular grooves are provided at the contact positions of the two first box bodies 321. When the two first box bodies 321 are closed, a complete circular constraint space is formed, and together with the sealing gasket, the battery is completely wrapped to provide a sealed environment for high-temperature or puncture tests.

[0037] In one embodiment, as Figure 8 shown, the environmental monitoring module 300 further includes a heating component 360, a fire protection component 370, and an image monitoring component 380. The heating component 360, the fire protection component 370, and the image monitoring component 380 are respectively arranged in the two sealing components 320, specifically in the second box body 322.

[0038] In one embodiment, the heating component 360 is a heating sheet arranged around the bottom of the first box body 321, and the required temperature field is tested by the principle of resistance heating; the image monitoring component 380 is a camera arranged at the bottom of the second box body 322 to monitor the battery state in real time; the fire protection component 370 includes a transmission motor 371, a transmission shaft 372, a driving gear 373, a driven gear 374, a synchronous belt 375, a nozzle 376, a water delivery pipe 377, a water tank 378, and a water pump 379. The transmission motor 371 is installed on one side of the second box body 322, the transmission shaft 372 is connected to the transmission motor 371, a plurality of nozzles 376 are uniformly installed on the transmission shaft 372, the driving gear 373 is sleeved on the transmission shaft 372, one of the driven gears 374 meshes with the driving gear 373, and the other driven gear 374 meshes with the driven gear 374 close to the driving gear 373 through the synchronous belt 375. The water tank 378 is arranged on the frame 100, the two ends of the water delivery pipe 377 are respectively connected to the water tank 378 and the nozzle 376, and the water pump 379 is arranged on the water delivery pipe 377.

[0039] In the above technical solution, a moving frame is externally fitted and connected to the transmission shaft 372, and the spray head 376 is arranged on the moving frame. When the transmission motor 371 drives the transmission shaft 372 to rotate, the moving frame can horizontally move on the transmission shaft 372. At the same time, the driven gear 374 can be driven by the driving gear 373 to rotate, thereby driving the synchronous belt 375 to rotate, realizing the rotation of another driven gear and the transmission shaft. By starting the water pump 379, the water in the water tank 378 can be pumped into the water delivery pipe 377 and then sprayed out through the spray head 376 to extinguish the fire.

[0040] Further, the fire-fighting component 370 further includes a smoke sensor. When a fire signal is detected by the smoke sensor, the transmission motor 371 is turned on to automatically adjust the position of the spray head 376, and the water pump 379 is turned on to start the spraying program to spray water through the spray head 376 to extinguish the fire.

[0041] In summary, the lithium battery safety performance testing device provided by the present invention integrates each testing module on one device, avoiding manual transfer of the battery and improving the testing efficiency. At the same time, the testing device of the present invention can apply multiple stress conditions simultaneously, and can more realistically simulate the real accident scenario of the battery suffering mechanical impact during thermal expansion, reducing the gap between the testing data and the actual data and improving the testing accuracy.

[0042] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A lithium battery safety performance testing device, characterized in that, include: frame; The charging detection module includes a first driving component, a clamping component and a charging component, wherein the first driving component is arranged in the middle of the frame, and the two ends of the first driving component are respectively connected to the two clamping components, and the two charging components are respectively arranged on two opposite sides of the two clamping components, and the two clamping components move relative to each other under the drive of the first driving component to clamp the battery to be tested and charge it; The environmental monitoring module includes a second driving component, a sealing component and a puncture component. The second driving component is arranged on the frame. The two ends of the second driving component are respectively connected to the two sealing components. The two puncture components are respectively arranged inside the two sealing components. The two sealing components move relative to each other under the drive of the second driving component to puncture the battery to be tested.

2. The lithium battery safety performance testing device according to claim 1, wherein The charging detection module further includes a first buffer component, and two first buffer components are respectively arranged inside the two clamping components to ensure that the electrodes of the battery to be tested are in full contact with the charging component.

3. The lithium battery safety performance testing device according to claim 1, wherein The environment monitoring module further comprises a second buffer component, and two second buffer components are respectively arranged inside the two puncture components to ensure smooth puncture of the battery to be tested.

4. The lithium battery safety performance testing device according to claim 3, characterized in that, The environmental monitoring module also includes a third driving assembly, two of which are respectively arranged inside the two sealing assemblies and are respectively connected to the two puncture assemblies in transmission, and each of the puncture assemblies moves horizontally along the puncture surface of the battery to be tested under the drive of the corresponding third driving assembly.

5. The lithium battery safety performance testing device according to claim 1, wherein The frame includes a bottom plate, a support column and a mounting seat, wherein the bottom of the support column is fixed to the bottom plate, and the mounting seat is fixed to a side surface of the support column, wherein: The mounting base is composed of an integrally formed mounting plate and side plates, the middle of one side of the mounting plate is fixedly mounted on the support column, the two side plates are arranged in the middle of the two ends of the mounting plate, the two ends of the first driving component are respectively fixed to the two side plates, and the two ends of the second driving component are respectively fixed to the upper and lower ends of the mounting plate.

6. The lithium battery safety performance testing device according to claim 5, wherein, The first driving assembly includes a connecting frame, a synchronous motor, a first bidirectional screw motor and a first slider, the two connecting frames are respectively mounted on the two side plates, the two synchronous motors are respectively arranged on one side of the two connecting frames, one end of the two first bidirectional screw motors is arranged on the other side of one of the connecting frames and is connected to the synchronous motor on this side through a coupling, the other end of the two first bidirectional screw motors is arranged on the other side of the other connecting frame and is connected to the synchronous motor on this side through a coupling, the four first sliders are respectively cooperated and connected with the two first bidirectional screw motors, and the two sides of the clamping assembly are respectively fixedly connected to the first slider.

7. The lithium battery safety performance testing device according to claim 2, wherein, The clamping assembly includes an inner frame and an outer frame that are sleeved together, the outer frame is connected to the first driving assembly, the charging assembly includes a plurality of joints arranged on the outside of the inner frame, the first buffer assembly includes a plurality of first dampers arranged on a side of the inner frame away from the joints, and a first elastic member is sleeved on the outside of the first damper.

8. The lithium battery safety performance testing device according to claim 5, wherein The second driving component includes a second bidirectional lead screw motor, second sliders, limit blocks and limit rods. The mounting plate is provided with a chute and limit grooves in the vertical direction. The two limit grooves are respectively located on both sides of the chute. The two second sliders are slidably arranged in the chute and are adapted to the second bidirectional lead screw motor. The four limit blocks are respectively slidably arranged in the limit grooves and are respectively sleeved outside the two limit rods. The second slider and the two limit blocks on the same side are jointly fixed to the sealing component on that side.

9. The lithium battery safety performance testing device according to claim 4, characterized in that, The sealing component includes a first box body and a second box body with a communicated internal space. The outer wall of the first box body is connected to the second driving component. The side wall of the second box body is provided with heat dissipation grilles. The third driving component includes a unidirectional lead screw motor and a guide rod. The unidirectional lead screw motor is installed on one side inner wall of the second box body. The two guide rods are arranged on the inner wall of this side of the second box body and are located on both sides of the unidirectional lead screw motor. The puncture component includes a sliding plate, a top plate and a needle. The second buffer component includes a second damper and a second elastic member. The sliding plate is sleeved outside the unidirectional lead screw motor and the two guide rods. The two ends of the second damper are respectively connected to the sliding plate and the top plate. The second elastic member is sleeved outside the second damper. The needle is arranged at one end of the top plate away from the sliding plate.

10. The lithium battery safety performance testing device according to claim 1, wherein, The environmental monitoring module further includes a heating component, a fire protection component and an image monitoring component. The heating component, the fire protection component and the image monitoring component are respectively arranged in the two sealing components.

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