A test device for a battery pack

Abstract

The embodiment of the application provides a kind of test device for battery pack, including: support platform, test component includes pedestal and piston rod, piston rod is connected with pedestalPiston rod is telescopically arranged along preset direction;Sliding assembly, sliding assembly is connected with pedestal, sliding assembly is movably arranged relative to pedestal, sliding assembly includes sliding table and mounting plate, mounting plate is connected with sliding table, mounting plate is movably arranged relative to sliding table along preset direction, and mounting plate is used to carry battery pack to be measured;Impact component, impact component is connected with sliding table, and impact component is arranged on the side of mounting plate close to piston rod;Energy-absorbing component, energy-absorbing component is connected with sliding table, and at least part of energy-absorbing component is formed between sliding table Installation space, mounting plate is arranged in installation space;Sensor component, sensor component is connected with at least one of sliding table and mounting plate, and sensor component is at least used to detect the stress information of battery pack to be measured, so that test scene is closer to real collision scene.

Description

Technical Field

[0001] This application relates to the field of vehicle parts testing technology, and more specifically, to a testing apparatus for battery packs. Background Technology

[0002] With the rapid development of the electric vehicle industry, the safety performance, especially the impact resistance, of automotive battery packs, as one of the core components of new energy vehicles, has become a crucial consideration in the research and development and production process. Vehicles may encounter various collisions during operation, posing a severe challenge to the safety of battery packs. To ensure that battery packs maintain normal function after a collision and avoid safety hazards such as short circuits, leakage, or even explosions, the development of impact resistance testing devices capable of realistically simulating collision scenarios has become particularly important.

[0003] However, current automotive battery pack impact testing devices on the market have shortcomings in simulating real-world collision scenarios. Existing battery pack impact testing devices often impact the battery pack under static conditions, meaning the battery pack is stationary while an impact head or device strikes it. This approach fails to consider that in actual collision scenarios, the vehicle body structure is impacted and absorbs some energy first, and only then is the battery pack affected. Therefore, direct impact testing methods cannot accurately reflect the energy attenuation and distribution during a collision, leading to significant discrepancies between test results and actual collision scenarios.

[0004] There is currently no effective solution to the aforementioned technical problems. Utility Model Content

[0005] This application provides a testing device for battery packs, which aims to improve the problem of poor testing accuracy in the prior art due to the difficulty in simulating real collision scenarios during static testing of battery packs.

[0006] According to one aspect of the embodiments of this application, a testing device for a battery pack is provided, comprising: a support platform; a test assembly including a base and a piston rod connected to the base and telescopically disposed along a preset direction; a sliding assembly connected to the base and movably disposed relative to the base, the sliding assembly including a slide table and a mounting plate connected to the slide table and movably disposed relative to the slide table along a preset direction, the mounting plate being used to support the battery pack under test; an impact assembly connected to the slide table and disposed on the side of the mounting plate near the piston rod; an energy absorption assembly connected to the slide table, at least a portion of the energy absorption assembly forming an installation space with the slide table, the mounting plate being disposed within the installation space; and a sensor assembly connected to at least one of the slide table and the mounting plate, the sensor assembly being used at least to detect the force information of the battery pack under test.

[0007] The embodiments of this application achieve the following technical effects: By mounting the battery pack under test on a movable mounting plate and providing power through a piston rod, the dynamic impact of the battery pack during a car collision can be simulated more realistically, including changes in speed, direction, and acceleration. This is closer to actual working conditions than static impact testing. The design of the energy-absorbing component, especially the mounting space formed between it and the sliding table, allows the internal structure of the device to deform and absorb energy to a certain extent after the collision, which is closer to the energy absorption characteristics of a car body during a collision. With the impact component positioned on the side of the mounting plate near the piston rod, combined with the mobility of the sliding component, this invention can perform multi-angle and multi-directional impact tests on the battery pack, fulfilling comprehensive testing requirements.

[0008] Furthermore, the energy-absorbing assembly includes: a damper connected to the slide table, the damper being disposed on the side of the mounting plate near the piston rod; and an energy-absorbing element connected to the slide table, the length direction of the energy-absorbing element being disposed along a preset direction, with a portion of the energy-absorbing element located on the side of the mounting plate near the piston rod and another portion of the energy-absorbing element located on the side of the mounting plate away from the piston rod.

[0009] The above-mentioned optional embodiments of this application achieve the following technical effects: the setting of dampers and energy-absorbing elements can simulate the real scenario of energy absorption during vehicle collisions, thereby improving the accuracy of test results.

[0010] Furthermore, the energy-absorbing element includes: an energy-absorbing tube connected to the slide table, with multiple energy-absorbing tubes, a portion of which is located on the side of the mounting plate closer to the piston rod, and another portion of which is located on the side of the mounting plate away from the piston rod; and a buffer rod connected to the mounting plate, with multiple buffer rods, each buffer rod corresponding to one of the multiple energy-absorbing tubes.

[0011] The above-mentioned optional embodiments of this application achieve the following technical effects: Through the synergistic effect of the energy-absorbing tube and the buffer rod, the testing device can more accurately evaluate the impact resistance performance of the battery pack under various collision conditions, effectively improving the reliability and accuracy of the test.

[0012] Furthermore, the energy-absorbing tube has a weakening structure, which consists of multiple weakening structures arranged at intervals along the axial direction of the energy-absorbing tube.

[0013] The above-mentioned optional embodiments of this application achieve the following technical effects: by weakening the structure design of the energy-absorbing tube in the energy-absorbing component, the realism and accuracy of the device simulating the impact of a vehicle collision on the battery pack are effectively enhanced.

[0014] In another embodiment of this application, the energy-absorbing assembly further includes: an energy-absorbing base connected to a slide table, an energy-absorbing element connected to the energy-absorbing base, the energy-absorbing element having a honeycomb cross-section; and a nesting plate connected to the energy-absorbing base, the nesting plate being arranged circumferentially along the energy-absorbing element.

[0015] The above-mentioned optional embodiments of this application achieve the following technical effects: they enhance the energy absorption capacity of the energy-absorbing components, enabling them to more effectively simulate the energy absorption process of the vehicle body structure during a collision.

[0016] Furthermore, the mounting plate includes: a mounting plate body, which is connected to the slide; a flange, one end of which is connected to the mounting plate body and the other end of which extends toward the slide; a buffer rod connected to the flange; and the flange being set at an angle to the mounting plate body.

[0017] The above-mentioned optional embodiments of this application achieve the following technical effects: through the guiding effect of the flange, the buffer rod can contact the energy-absorbing tube at a specific angle, which more realistically simulates the force situation of the battery pack during a vehicle collision.

[0018] Furthermore, the mounting plate includes reinforcing blocks connected to flanges. There are multiple reinforcing blocks, and at least one of the multiple reinforcing blocks is disposed corresponding to a damper.

[0019] The above-mentioned optional embodiments of this application achieve the following technical effects: by introducing the combination of reinforcing blocks and flanges, the structural stability and load-bearing capacity of the mounting plate are enhanced.

[0020] Furthermore, the sliding assembly also includes: a stop block, which is connected to the slide table. There are multiple stops, which are spaced apart along the length of the mounting plate. Some of the stops are located on the side of the mounting plate closer to the piston rod, and other parts of the stops are located on the side of the mounting plate away from the piston rod. A protective cover is connected to the slide table, and the mounting plate, impact assembly, and energy absorption assembly are all located inside the protective cover.

[0021] The optional embodiments described above achieve the following technical effects: The blocks are connected to the slide, and multiple blocks are spaced apart along the length of the mounting plate, enabling more comprehensive contact and buffering of the mounting plate's reverse movement after impact, ensuring stability and repeatability during testing. The protective cover not only provides external protection, avoiding safety hazards caused by flying parts during testing, but also creates a closed testing environment, helping to isolate external interference and improve the accuracy of test data.

[0022] Furthermore, the multiple stops include: a first stop connected to the slide table, the first stop located on the side of the mounting plate away from the piston rod, and there are multiple first stops; and a second stop connected to the slide table, the second stop located on the side of the mounting plate close to the piston rod, and there are multiple second stops, the side of the second stop close to the mounting plate having an anti-collision part.

[0023] The above-mentioned optional embodiments of this application achieve the following technical effects: by introducing the configuration of the first block and the second block, this testing device can more meticulously and comprehensively simulate the complex mechanical environment during vehicle collisions, ensuring the accuracy and reliability of battery pack testing.

[0024] Furthermore, the impact assembly includes: a bracket connected to a slide, the bracket being disposed on the side of the mounting plate near the piston rod; an adapter plate connected to the bracket; and an impact head connected to the bracket via the adapter plate.

[0025] The above-mentioned optional embodiments of this application achieve the following technical effects: by working together with the adapter plate, the impact head and the bracket, it is ensured that the battery pack can accurately contact the impact head during the test, regardless of its size or shape, and thus conduct an effective impact test.

[0026] The embodiments of this application achieve the following technical effects: by movably setting the sliding component relative to the base, the piston rod impacts the sliding component, the energy absorption component simulates the shock absorption effect of the vehicle frame during actual collision, and the impact component impacts the battery pack under test during the movement, making the test scenario closer to the real collision scenario, thereby improving the test accuracy and solving the problem of poor test accuracy caused by the difficulty in simulating the real collision scenario in the static test of the battery pack in the prior art. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0028] Figure 1 This is an exploded view of a testing apparatus for a battery pack provided in an embodiment of this application;

[0029] Figure 2 This is an assembly schematic diagram of a battery pack testing device provided in one embodiment of this application;

[0030] Figure 3 This is a schematic diagram of the structure of a testing device for a battery pack provided in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure of a testing device for a battery pack provided in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the structure of an energy-absorbing component provided in an embodiment of this application;

[0033] Figure 6 This is a schematic diagram of the structure of an energy-absorbing component provided in an embodiment of this application;

[0034] Figure 7 This is a schematic diagram of the structure of an energy-absorbing component provided in an embodiment of this application;

[0035] Figure 8 This is a schematic diagram of the structure of the first stop block provided in an embodiment of this application;

[0036] Figure 9 This is a schematic diagram of the structure of the second stop provided in an embodiment of this application;

[0037] Figure 10 This is a schematic diagram of the structure of an impact component provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Support platform; 11. Base; 12. Piston rod; 13. Simulated collider;

[0040] 20. Sliding assembly; 21. Slide table; 22. Mounting plate; 220. Mounting plate body; 221. Flanged edge; 2211. Reinforcing block; 23. Stop block; 231. First stop block; 232. Second stop block; 2321. Anti-collision part; 24. Protective cover; 25. Slide rail; 26. Slider;

[0041] 30. Impact assembly; 31. Impact head; 311. Impact section; 312. Connecting section; 32. Adapter plate; 33. Bracket;

[0042] 40. Energy-absorbing component; 400. Installation space; 41. Damper; 42. Energy-absorbing element; 421. Energy-absorbing tube; 4211. Weakening structure; 422. Honeycomb block; 43. Buffer rod; 44. Nested plate; 45. Energy-absorbing base;

[0043] 50. Battery pack to be tested. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0048] Existing battery pack testing devices have the following drawbacks:

[0049] 1) Lack of simulation of energy absorption by vehicle body structure: Existing testing equipment directly applies impact force to the battery pack without considering the energy absorption of the vehicle body structure during a real vehicle collision. This results in differences between the test results and real vehicle collision scenarios, affecting the accuracy of the test.

[0050] 2) Limitations of impact angle and location: Existing testing devices are relatively limited in impact direction and location, and cannot fully cover the various impact conditions during vehicle collisions, thus limiting the comprehensiveness and effectiveness of the test.

[0051] 3) Low energy transfer efficiency: During the impact test, there is significant energy loss in the process of transferring energy from the impact device to the battery pack. Especially when simulating severe collision conditions, the battery pack may not be able to withstand the expected impact force, which affects the accuracy of the test.

[0052] 4) Limited testing scenarios: Existing testing devices can often only simulate a certain type of collision, such as frontal or side collisions, and cannot provide comprehensive, multi-angle collision simulations, which limits their application value in complex collision conditions.

[0053] 5) Insufficient protective measures: Although some test devices are equipped with fire extinguishing systems, they lack comprehensive protection for the battery pack during the impact process, which affects the safety of the experiment.

[0054] To address the above deficiencies, this application proposes a testing device for battery packs, which aims to provide a more comprehensive and accurate impact resistance test by simulating the energy transfer and energy absorption mechanism of the vehicle body structure during a real vehicle collision, thereby overcoming the aforementioned problems in the prior art.

[0055] Combination Figures 1 to 10 As shown, this application provides a testing device for battery packs.

[0056] This application provides a testing device for a battery pack, including a support platform 10, a sliding assembly 20, an impact assembly 30, an energy absorption assembly 40, and a sensor assembly. The support platform 10 includes a base 11 and a piston rod 12, which is connected to the base 11 and is telescopically arranged along a preset direction. The sliding assembly 20 is connected to the base 11 and is movably arranged relative to the base 11. The sliding assembly 20 includes a slide table 21 and a mounting plate 22, which is connected to the slide table 21 and is telescopically arranged along a preset direction. The mounting plate 22 is movably positioned relative to the slide table 21 and is used to support the battery pack 50 under test. The impact assembly 30 is connected to the slide table 21 and is located on the side of the mounting plate 22 near the piston rod 12. The energy absorption assembly 40 is connected to the slide table 21, and at least a portion of the energy absorption assembly 40 and the slide table 21 form an installation space 400. The mounting plate 22 is located within the installation space 400. The sensor assembly is connected to at least one of the slide table 21 and the mounting plate 22 and is used to detect the force information of the battery pack 50 under test.

[0057] This application, by mounting the battery pack 50 under test on a movable mounting plate 22 and combining the power provided by the piston rod 12, can more realistically simulate the dynamic impact of the battery pack during a car collision, including changes in speed, direction, and acceleration. This is closer to actual working conditions than static impact testing. The design of the energy-absorbing component 40, especially the mounting space 400 formed between it and the slide table 21, allows the internal structure of the device to undergo a certain degree of deformation and energy absorption after the collision. This is closer to the energy absorption characteristics of a car body during a collision, providing a more accurate testing environment. The impact component 30 is located on the side of the mounting plate 22 near the piston rod 12. Combined with the mobility of the sliding component 20, this invention can perform multi-angle and multi-directional impact tests on the battery pack, achieving comprehensive testing requirements.

[0058] Combination Figures 1 to 3 As shown, the support platform 10 includes a base 11, a piston rod 12, and a simulated impactor 13. The simulated impactor 13 is connected to the base 11, and the piston rod 12 is connected to the simulated impactor 13. The simulated impactor 13 is used to simulate the waveform with the same energy generated during a real collision with a vehicle, in order to recreate a real collision scenario. By extending and retracting the piston rod 12 of the support platform 10 in a preset direction, the sliding assembly 20 is driven to move relative to the base 11, so that the battery pack 50 under test mounted on the mounting plate 22 of the sliding assembly 20 obtains dynamic behavior close to that of an actual collision. The impact assembly 30 is disposed on the side of the mounting plate 22 near the piston rod 12, and is used to receive the impact of the battery pack 50 under test. The energy-absorbing assembly 40 is connected to the slide table 21, and the mounting space 400 formed between it and the slide table 21 is used to accommodate the mounting plate 22. When the slide table 21 moves, the energy-absorbing assembly 40 can absorb part of the energy during the collision, similar to the energy-absorbing zone in the vehicle structure, ensuring that the transmission of the impact force is closer to the actual vehicle situation. The sensor assembly is connected to the slide table 21 and the mounting plate 22 to collect the force information of the battery pack 50 under test in real time. Through data analysis, the performance of the battery pack 50 under test is evaluated under simulated collision, and its safety and reliability are verified. Therefore, the technical solution of this application can more accurately simulate the impact on the battery pack during a vehicle collision, thereby providing more reliable data support for the design and optimization of the battery pack and improving the safety performance of new energy vehicles.

[0059] Combination Figure 3 As shown, the energy-absorbing assembly 40 includes a damper 41 and an energy-absorbing element 42. The damper 41 is connected to the slide table 21 and is disposed on the side of the mounting plate 22 near the piston rod 12. The energy-absorbing element 42 is connected to the slide table 21 and is disposed along a preset direction in the length direction. Part of the energy-absorbing element 42 is located on the side of the mounting plate 22 near the piston rod 12, and the other part of the energy-absorbing element 42 is located on the side of the mounting plate 22 away from the piston rod 12.

[0060] In this embodiment, the damper 41 is directly connected to the slide table 21 and located on the side of the mounting plate 22 near the piston rod 12. It can respond immediately during the collision simulation, effectively mitigating the initial impact force and simulating the first stage of energy absorption during a vehicle collision. The energy-absorbing element 42 ensures that the collision energy can be fully absorbed and dispersed before the impact assembly 30 contacts the battery pack 50 under test, more accurately replicating the energy absorption behavior of the vehicle structure during a collision. The adjustability of the length and position of the energy-absorbing element 42 allows it to adapt to battery packs 50 of different sizes and weights, as well as to simulate collisions of different degrees, enhancing the versatility and flexibility of the testing device.

[0061] Combination Figure 4 As shown, the energy-absorbing element 42 includes an energy-absorbing tube 421 and a buffer rod 43. The energy-absorbing tube 421 is connected to the slide table 21. There are multiple energy-absorbing tubes 421. Some of the multiple energy-absorbing tubes 421 are located on the side of the mounting plate 22 closer to the piston rod 12, and the other part of the multiple energy-absorbing tubes 421 is located on the side of the mounting plate 22 away from the piston rod 12. The buffer rod 43 is connected to the mounting plate 22. There are multiple buffer rods 43, and the multiple buffer rods 43 are arranged one-to-one with the multiple energy-absorbing tubes 421.

[0062] In this embodiment, the energy-absorbing tube 421 is connected to the slide table 21 and is positioned on both sides of the mounting plate 22, close to and away from the piston rod 12. This arrangement allows the energy-absorbing tube 421 to effectively absorb and disperse impact energy from different directions when the battery pack 50 under test is impacted, reducing the direct impact force on the battery pack 50 and simulating the energy absorption process of the vehicle body structure in a collision. The buffer rod 43 is connected to the mounting plate 22 and is positioned one-to-one with the energy-absorbing tube 421. They provide further energy absorption after the energy-absorbing tube 421, ensuring the continuity and comprehensiveness of energy absorption throughout the test process and ensuring a high degree of fit between the test conditions and real collision scenarios. Through the synergistic effect of the energy-absorbing tube 421 and the buffer rod 43, this testing device can more accurately evaluate the impact resistance performance of the battery pack 50 under various collision conditions, effectively improving the reliability and accuracy of the test.

[0063] The energy-absorbing tube 421 has a weakening structure 4211, and there are multiple weakening structures 4211, which are spaced apart along the axial direction of the energy-absorbing tube 421.

[0064] In this embodiment, the weakening structure 4211 on the energy-absorbing tube 421 can specifically change the stress distribution of the energy-absorbing tube 421 during the collision test, making it easier to deform at specific locations, thereby absorbing and dissipating collision energy and simulating the behavior of the energy absorption zone in the vehicle structure.

[0065] Combination Figure 6As shown, in one embodiment of this application, the weakening structure 4211 is a through hole, which can be a square hole. Multiple square holes are spaced apart along the axial direction, which can specifically change the stress distribution of the energy-absorbing tube 421 during the collision test, making it easier for it to deform at a specific location, thereby absorbing and dissipating collision energy and simulating the behavior of the energy absorption zone in the vehicle structure.

[0066] The energy-absorbing tube 421 has a weakening structure 4211, which is arranged along the circumferential direction of the energy-absorbing tube 421 and extends along the axial direction of the energy-absorbing tube 421.

[0067] In another embodiment of this application, during the test, when the mounting plate 22 carrying the battery pack 50 under test impacts the impact component 30, the energy-absorbing tube 421 first absorbs a portion of the energy by weakening the deformation of the structure 4211, simulating the energy dissipation of the vehicle body structure in a vehicle collision, thereby making the subsequent contact between the battery pack 50 under test and the impact component 30 closer to the actual vehicle collision scenario, thus improving the accuracy of the test.

[0068] Combination Figure 7 As shown, in this embodiment, the weakening structure 4211 is a spirally arranged through hole. This arrangement enhances the controllable deformation capability of the energy-absorbing tube 421 under stress, ensuring the efficiency and stability of the energy absorption process.

[0069] Combination Figure 5 As shown, the energy absorption assembly 40 also includes an energy absorption base 45 and a nesting plate 44. The energy absorption base 45 is connected to the slide table 21, and the energy absorption element 42 is connected to the energy absorption base 45. The cross-section of the energy absorption element 42 is honeycomb-shaped. The nesting plate 44 is connected to the energy absorption base 45 and is arranged along the circumference of the energy absorption element 42.

[0070] In this embodiment, the combination of the energy-absorbing element 42 and the nesting plate 44 results in a honeycomb-shaped cross-section for the energy-absorbing element 42. This significantly enhances the energy absorption capacity of the energy-absorbing assembly 40, enabling it to more effectively simulate the energy absorption process of the vehicle body structure during a collision. By finely adjusting the material and size of the energy-absorbing element 42 (honeycomb block 422), energy absorption can be optimized for different types of collision conditions, thereby more realistically reproducing the impact of a vehicle collision on the battery pack. The combined use of the nesting plate 44 and the energy-absorbing base 45 not only enhances the structural rigidity of the entire device but also provides additional support for the energy-absorbing assembly, ensuring the accuracy and safety of the test.

[0071] Combination Figure 4As shown, the mounting plate 22 includes a mounting plate body 220 and a flange 221. The mounting plate body 220 is connected to the slide table 21. One end of the flange 221 is connected to the mounting plate body 220, and the other end of the flange 221 extends toward the slide table 21. The buffer rod 43 is connected to the flange 221, and the flange 221 is set at an angle to the mounting plate body 220.

[0072] In this embodiment, the flange 221 is set at a certain angle to the mounting plate body 220, which helps to guide the buffer rod 43 to play a more precise role during the collision. That is, through the guiding effect of the flange 221, the buffer rod 43 can contact the energy absorption tube 421 at a specific angle, which more realistically simulates the force situation of the battery pack during a vehicle collision.

[0073] Combination Figure 3 and Figure 4 As shown, the mounting plate 22 includes a reinforcing block 2211, which is connected to the flange 221. There are multiple reinforcing blocks 2211, and at least one of the multiple reinforcing blocks 2211 is provided corresponding to the damper 41.

[0074] In this embodiment, by setting up reinforcing blocks 2211, especially the reinforcing block corresponding to the damper 41, the impact energy transmitted by the piston rod 12 can be more effectively dispersed and absorbed, making the energy transfer more uniform during the test and reducing the risk of local overload on the battery pack 50 under test. This design not only ensures the safety of the battery pack during the test, but also improves the accuracy and reliability of the test results, and more comprehensively evaluates the performance of the battery pack under actual collision scenarios.

[0075] Combination Figure 1 As shown, the sliding assembly 20 also includes a stop block 23 and a protective cover 24. The stop block 23 is connected to the slide table 21. There are multiple stop blocks 23, which are spaced apart along the length of the mounting plate 22. Some of the multiple stop blocks 23 are located on the side of the mounting plate 22 closer to the piston rod 12, and other parts of the multiple stop blocks 23 are located on the side of the mounting plate 22 away from the piston rod 12. The protective cover 24 is connected to the slide table 21, and the mounting plate 22, the impact assembly 30, and the energy absorption assembly 40 are all located inside the protective cover 24.

[0076] The bidirectional arrangement of the stop block 23—partially located on the side of the mounting plate 22 closer to the piston rod 12, and the other part located on its relatively far side—provides stable support for the mounting plate 22 during both forward and reverse movement during testing, enhancing the adaptability and reliability of the device. The connection between the protective cover 24 and the slide table 21 ensures that both the impact assembly 30 and the energy-absorbing assembly 40 are located within the protective cover 24, creating safer and more controllable conditions for the testing process. Especially during high-energy impact tests, this significantly reduces the risk of accidental injury and improves the overall operational safety level of the testing device.

[0077] Combination Figure 1 , Figure 3 , Figure 8 and Figure 9 As shown, the multiple stops 23 include a first stop 231 and a second stop 232. The first stop 231 is connected to the slide table 21 and is located on the side of the mounting plate 22 away from the piston rod 12. There are multiple first stops 231, and each of the multiple first stops 231 is arranged in a one-to-one correspondence with a multiple energy-absorbing tube 421. The second stop 232 is connected to the slide table 21 and is located on the side of the mounting plate 22 near the piston rod 12. There are multiple second stops 232, and each of the multiple second stops 232 is arranged in a one-to-one correspondence with a portion of the multiple reinforcing blocks 2211. The side of the second stop 232 near the mounting plate 22 has an anti-collision part 2321.

[0078] During the test, when the mounting plate 22 moves the battery pack 50 under test to the end of its travel, the first stop 231 contacts the corresponding energy-absorbing tube 421, further refining the energy absorption and ensuring the controllability of the impact process and the accuracy of the test results. The second stop 232 is connected to the slide table 21 and is located on the side of the mounting plate 22 near the piston rod 12. Some of the second stops 232 correspond one-to-one with the reinforcing block 2211, and have an anti-collision part 2321 on the side facing the mounting plate 22. The design of the anti-collision part 2321 helps to provide additional protection when the mounting plate 22 moves rapidly toward the second stop 232, avoiding unexpected secondary impacts on the battery pack 50 under test, and ensuring the safety of the test process and the validity of the test results.

[0079] Combination Figure 10 As shown, the impact assembly 30 includes an impact head 31, an adapter plate 32, and a bracket 33. The bracket 33 is connected to the slide table 21 and is located on the side of the mounting plate 22 near the piston rod 12. The adapter plate 32 is connected to the bracket 33. The impact head 31 is connected to the bracket 33 through the adapter plate 32.

[0080] In this embodiment, the impact assembly 30 includes a bracket 33, which is securely connected to the slide table 21 and positioned on the mounting plate 22 near the piston rod 12. This ensures that the impact head 31 can accurately align with the battery pack during testing, simulating the impact effects of a vehicle in different collision scenarios. The adapter plate 32 is flexibly connected to the bracket 33, enabling multi-angle positioning of the impact head 31. This allows the testing device to adapt to impacts from various directions that the battery pack 50 under test may experience in actual collisions, thus providing a more comprehensive evaluation of the battery pack's safety performance. Through the coordinated operation of the adapter plate 32, the impact head 31, and the bracket 33, it is ensured that, regardless of the size or shape of the battery pack 50 under test, it can accurately contact the impact head 31 during testing, enabling effective impact testing.

[0081] Combination Figure 10 As shown, the impact head 31 includes a connecting section 312 and an impact section 311. The connecting section 312 is connected to the adapter plate 32; the impact section 311 is connected to the connecting section 312, and the longitudinal cross-sectional area of ​​the impact section 311 is varied.

[0082] In this embodiment, the impact head 31 is composed of a connecting section 312 and an impact section 311. The connecting section 312 ensures a stable connection between the impact head 31 and the adapter plate 32, while the impact section 311 has a variable cross-sectional area, which can adjust the area of ​​contact between it and the battery pack 50 under test according to different test requirements, thereby changing the distribution of impact force and simulating collisions at different locations, such as side, front, or rear collisions of a vehicle.

[0083] Combination Figure 10 As shown, in a specific embodiment of this application, the cross-sectional area of ​​the connecting segment 312 is circular. This arrangement allows the impact head 31 to adjust the angle of the connecting segment 312, thereby enabling the impact segment 311 to simulate collisions with the battery pack 50 under test at different angles. This allows for a more comprehensive evaluation of the battery pack's performance under various collision conditions, effectively compensating for the shortcomings of the prior art in that the impact test is singular and cannot cover multiple collision scenarios.

[0084] Combination Figure 1 As shown, the sliding assembly 20 also includes a slide rail 25 and a slider 26. The slide rail 25 is connected to the slide table 21 and is arranged adjacent to the mounting plate 22. The slide rail 25 is arranged along a preset direction. The slider 26 is connected to the mounting plate 22 and is connected to the slide rail 25. The slider 26 is movably arranged relative to the slide rail 25.

[0085] In this embodiment, the combined design of the slide rail 25 and the slider 26 enables the mounting plate 22 and the battery pack 50 under test on it to obtain acceleration and kinetic energy in the collision simulation, achieving a dynamic impact effect. This is closer to the actual vehicle collision scenario than the static impact test of the fixed battery pack, thus obtaining more reliable and repeatable test results.

[0086] In one specific embodiment of this application, the working principle of the testing device for the battery pack is as follows:

[0087] Before the test, collision acceleration waveform data of the actual vehicle was collected, and a waveform with the same energy was calibrated using the simulated collision device 13. The mounting plate 22, first stop 231, second stop 232, slide rail 25, slider 26, impact component 30, and energy absorption component 40 were installed on the slide table 21, and the impact position and angle of the impact head 31 were adjusted. During operation, the simulated collision device 13 instantly transfers all the impact energy to the slide table 21 via the piston rod 12. The slide table 21 is launched in the impact direction (away from the piston rod 12). At this time, the mounting plate 22 moves in the opposite direction of the impact due to inertia (closer to the piston rod 12), causing the battery pack 50 under test to move closer to the impact head 31. After the energy absorption component 40 absorbs some of the energy, the battery pack 50 under test... The battery pack 50 contacts the impact head 31, completing the impact of the battery pack 50 on the impact head 31. After the impact, the mounting plate 22 will have a rebound phase, moving towards the impact direction of the piston rod 12 (the side closer to the piston rod 12). The energy-absorbing element 42 (energy-absorbing tube 421) contacts the first stop 231 to absorb the rebound energy. After the energy-absorbing tube 421 is compressed to a certain extent, the reinforcing block 2211 on the mounting plate 22 contacts the second stop 232 (the anti-collision part 2321). The second stop 232 ensures that the mounting plate 22 will not detach from the slide rail 25, and the impact resistance test is completed. If a fire occurs during the test, the protective cover 24 is equipped with a temperature sensor, and the fire extinguishing control room will immediately and automatically control the release of perfluorohexanone gas extinguishing agent to quickly extinguish the fire through the pipeline.

[0088] During this process, the damper 41 and the reinforcing block 2211 on the mounting plate 22 will first come into contact and absorb some energy. Then, the energy-absorbing tube 421 will come into contact with the first stop block 231, and both will absorb the impact energy at the same time. When the absorption effect of the damper 41 and the energy-absorbing tube 421 on the impact energy is equivalent to the energy absorbed by the vehicle body structure in a real vehicle collision, the impact head 31 will start to impact the battery pack 50 under test, thereby more realistically simulating the impact effect on the vehicle battery pack during a car collision.

[0089] In another embodiment of this application, a method for testing the impact resistance of an automotive battery pack is also provided, comprising the following steps:

[0090] Step 1: Collect the actual vehicle collision acceleration waveform and body structure deformation data, and use the simulated collision device 13 to debug the waveform with the same energy;

[0091] Step 2: Install the mounting plate 22, the first stop 231, the second stop 232, the slide rail 25, the slider 26, the impact assembly 30, and the energy absorption assembly 40 on the slide table 21. Remove the battery pack 50 to be tested and the protective cover 24. Install the sensor assembly on the slide table 21 and the mounting plate 22 to collect data. Start the simulated collision device 13 and the piston rod 12 to complete the launch. Compare the test data with the actual vehicle data.

[0092] Step 3: Adjust the damper 41 to change the length of the energy-absorbing tube 421 and the shape of the weakening structure 4211 (weakening groove), conduct multiple tests, and after confirming that the test data and the actual vehicle data are consistent, install the battery pack 50 to be tested and the protective cover 24 on the slide table 21, and start the simulated collision device 13 and piston rod 12 again to complete the battery pack impact resistance test.

[0093] In this application, "multiple" refers to two or more.

[0094] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0095] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if any) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0096] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0097] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

Claims

1. A testing apparatus for a battery pack, characterized in that, include: The support platform (10) includes a base (11) and a piston rod (12), the piston rod (12) is connected to the base (11), and the piston rod (12) is telescopically arranged in a preset direction; A sliding assembly (20) is connected to the base (11). The sliding assembly (20) is movably disposed relative to the base (11). The sliding assembly (20) includes a slide (21) and a mounting plate (22). The mounting plate (22) is connected to the slide (21). The mounting plate (22) is movably disposed relative to the slide (21) along the preset direction. The mounting plate (22) is used to support the battery pack (50) to be tested. Impact assembly (30), which is connected to the slide (21), is disposed on the side of the mounting plate (22) near the piston rod (12); An energy-absorbing component (40) is connected to the slide (21), and at least a portion of the energy-absorbing component (40) and the slide (21) form an installation space (400), and the mounting plate (22) is disposed within the installation space (400); A sensor assembly connected to at least one of the slide (21) and the mounting plate (22), the sensor assembly being used at least to detect force information of the battery pack (50) under test.

2. The testing apparatus for a battery pack according to claim 1, characterized in that, The energy-absorbing component (40) includes: A damper (41) is connected to the slide (21) and is disposed on the side of the mounting plate (22) near the piston rod (12). Energy-absorbing element (42) is connected to the slide (21). The length direction of the energy-absorbing element (42) is set along the preset direction. Part of the energy-absorbing element (42) is located on the side of the mounting plate (22) close to the piston rod (12), and the other part of the energy-absorbing element (42) is located on the side of the mounting plate (22) away from the piston rod (12).

3. The testing apparatus for a battery pack according to claim 2, characterized in that, The energy-absorbing element (42) includes: An energy-absorbing tube (421) is connected to the slide (21). There are multiple energy-absorbing tubes (421). A portion of the multiple energy-absorbing tubes (421) is located on the side of the mounting plate (22) closer to the piston rod (12), and another portion of the multiple energy-absorbing tubes (421) is located on the side of the mounting plate (22) away from the piston rod (12). A buffer rod (43) is connected to the mounting plate (22). There are multiple buffer rods (43), and multiple buffer rods (43) are arranged one-to-one with multiple energy-absorbing tubes (421).

4. The testing apparatus for a battery pack according to claim 3, characterized in that, The energy-absorbing tube (421) has a weakening structure (4211), and there are multiple weakening structures (4211), which are spaced apart along the axial direction of the energy-absorbing tube (421).

5. The testing apparatus for a battery pack according to claim 2, characterized in that, The energy-absorbing component (40) also includes: An energy-absorbing base (45) is connected to the slide (21), and an energy-absorbing element (42) is connected to the energy-absorbing base (45). The cross-section of the energy-absorbing element (42) is honeycomb. Nested plate (44), which is connected to the energy-absorbing base (45), is arranged along the circumference of the energy-absorbing element (42).

6. The testing apparatus for a battery pack according to claim 3, characterized in that, The mounting plate (22) includes: Mounting plate body (220), the mounting plate body (220) is connected to the slide (21); A flange (221) is provided, one end of which is connected to the mounting plate body (220), and the other end of which extends toward the slide (21). A buffer rod (43) is connected to the flange (221), and the flange (221) is set at an angle to the mounting plate body (220).

7. The testing apparatus for a battery pack according to claim 6, characterized in that, The mounting plate (22) includes a reinforcing block (2211) connected to the flange (221). There are multiple reinforcing blocks (2211), and at least one of the multiple reinforcing blocks (2211) is provided corresponding to the damper (41).

8. The testing apparatus for a battery pack according to claim 1, characterized in that, The sliding component (20) further includes: A stop block (23) is connected to the slide table (21). There are multiple stop blocks (23). The multiple stop blocks (23) are spaced apart along the length direction of the mounting plate (22). A portion of the multiple stop blocks (23) is located on the side of the mounting plate (22) closer to the piston rod (12), and another portion of the multiple stop blocks (23) is located on the side of the mounting plate (22) away from the piston rod (12). The protective cover (24) is connected to the slide (21), and the mounting plate (22), the impact component (30), and the energy absorption component (40) are all located inside the protective cover (24).

9. The testing apparatus for a battery pack according to claim 8, characterized in that, The plurality of said stops (23) include: The first stop (231) is connected to the slide (21). The first stop (231) is located on the side of the mounting plate (22) away from the piston rod (12). There are multiple first stops (231). The second stop (232) is connected to the slide (21). The second stop (232) is located on the side of the mounting plate (22) near the piston rod (12). There are multiple second stops (232). The side of the second stop (232) near the mounting plate (22) has an anti-collision part (2321).

10. The testing apparatus for a battery pack according to claim 1, characterized in that, The impact assembly (30) includes: A bracket (33) is connected to the slide (21) and is disposed on the side of the mounting plate (22) near the piston rod (12); Adapter plate (32), which is connected to the bracket (33); Impact head (31), which is connected to the bracket (33) via the adapter plate (32).

Images