A Collision Test Device for New Energy Vehicle Battery Packs

Abstract

The present invention relates to the technical field of new energy vehicle battery pack detection, and specifically relates to a collision test device for a new energy vehicle battery pack, including: a transverse movement mechanism is arranged on the upper side of a bottom plate, a lifting mechanism is arranged on the outside of the transverse movement mechanism, and a clamping mechanism is arranged on the lifting mechanism; the present invention can apply targeted impacts to a single area of the battery pack or apply composite impacts to different areas synchronously, and can simulate the extrusion force continuously exerted by a pile on the battery pack under the influence of the vehicle's own weight during a collision impact; the present invention can realize driving the battery pack to move laterally synchronously during the process of the battery pack being vertically impacted, so as to simulate the composite stress state of the battery pack under the influence of vehicle inertia during an actual collision; the present invention can accurately simulate the vertical extrusion force exerted by a pile on the battery pack under the action of the vehicle's own weight, and by driving the battery pack to move laterally, test the influence of lateral extrusion friction on the overall structural stability of the battery pack in a state of no impact or weak impact.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle battery pack detection, and in particular to a new energy vehicle battery pack collision test device. Background Art

[0002] The battery pack of a new energy vehicle is the core energy storage unit of an electric vehicle. It is usually composed of multiple battery modules, a battery management system, a cooling system and a casing. The safety of the battery pack is directly related to the vehicle's endurance, stability and passenger safety. Therefore, its impact resistance and other properties need to be verified through collision tests.

[0003] In the existing technology, since the testing method of directly driving the chassis battery pack to collide with the pile by the moving vehicle is highly dangerous and cost-intensive, a pre-simulation test is required before the actual vehicle test. Usually, the battery pack is first fixed on a test bench or a vehicle simulation frame, and then a special impact equipment is used to impact the key areas such as the center, four corners and edges of the bottom of the battery pack from bottom to top. Through the multi-dimensional simulated collision design, the structural impact resistance and safety threshold of the battery pack can be more comprehensively evaluated, providing a theoretical basis and risk prediction for subsequent actual vehicle testing.

[0004] However, the traditional method of conducting pre-launch simulated crash tests on battery packs has the following problems: 1. Although the structural impact resistance and other properties of the battery pack can be evaluated through directional impact in existing simulated crash tests, their test logic mainly relies on the energy impact generated by instantaneous collisions, and fails to truly reproduce the continuous squeezing state between the battery pack and the pile under the action of the vehicle's own weight during a collision. 2. In existing simulated crash tests, the battery pack is usually subjected to single-point instantaneous impacts in sequence. However, during an actual vehicle collision, the battery pack is generally subjected to simultaneous impacts at multiple discrete points, resulting in a composite superposition of stresses in various regions, thereby exacerbating the overall deformation of the battery pack. 3. During an actual vehicle collision, the vehicle's own inertia causes the battery pack and the pile to form continuous squeezing and relative displacement, thereby causing large-scale friction damage and dynamic shear failure on the battery pack surface. However, in existing simulated crash tests, the battery pack is usually fixed and cannot be moved, which cannot fully reflect the comprehensive performance of the battery pack under the composite action state in an actual collision. As a result, the test data can only be used as a theoretical reference, thereby concealing the potential structural damage or functional abnormality risks of the battery pack during production testing, affecting risk control during actual vehicle testing. Summary of the Invention

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a new energy vehicle battery pack collision test device, comprising a base plate, a transverse movement mechanism is provided on the upper side of the base plate, a lifting mechanism is provided on the outer side of the transverse movement mechanism, and a clamping mechanism is provided on the lifting mechanism.

[0006] The transverse movement mechanism includes a first guide rail symmetrically fixed on the upper side of the bottom plate before and after through a backing plate. A second guide rail is fixedly arranged on the upper side of the bottom plate and between the backing plates. The first guide rail is provided with a mounting and positioning part for fixing the battery pack. A transverse movement part slidably matched with the corresponding first guide rail is arranged on the lower side of the mounting and positioning part. A traction docking part is arranged on the mounting and positioning part. A transverse traction part for driving the mounting and positioning part to move transversely in cooperation with the traction docking part is arranged on the second guide rail.

[0007] The lifting mechanism includes lifting driving parts symmetrically arranged on the upper side of the bottom plate before and after. Guide columns are symmetrically fixed on the upper side of the bottom plate and between the lifting driving parts before and after. A driven lifting part that cooperates with the lifting driving parts to lift and lower is jointly arranged on the symmetrically arranged guide columns before and after. An impact adjustment part for performing impact tests on different areas of the battery pack is arranged on the driven lifting part.

[0008] The clamping mechanism includes a clamping driving part arranged on the driven lifting part and a driven clamping part that cooperates with the clamping driving part to lock and position the driven lifting part on the guide column.

[0009] Preferably, the mounting and positioning part includes a mounting table that moves left and right along the first guide rail. A first buffer pad is fixedly arranged on the lower surface inside the mounting table. Cylinders I are symmetrically fixed on the mounting table before and after. A connecting plate I that moves back and forth is fixedly arranged at the telescopic end of the cylinder I. Slide rods slidably connected to the corresponding side walls of the mounting table are symmetrically fixed on the left and right sides of the connecting plate I close to the corresponding cylinder I. Positioning clamping plates are symmetrically fixed on the upper and lower sides of the connecting plate I away from the corresponding cylinder I. A first damping pad is fixedly arranged on the side of the positioning clamping plate away from the corresponding connecting plate I.

[0010] Preferably, the transverse movement part includes fixing plates I fixedly arranged at the four corners of the lower surface of the mounting table. The fixing plates I are located inside the corresponding first guide rails. Two groups of ball bearings are symmetrically arranged on the fixing plates I before and after and roll. Each group consists of a plurality of ball bearings evenly distributed left and right. A plurality of moving wheels are evenly rotatably arranged on the left and right sides of the lower side of the fixing plate I through a support I.

[0011] Preferably, the traction docking part includes fixing plates II symmetrically fixed on the mounting table before and after. Docking seats are symmetrically fixed on the sides of the fixing plates II away from the mounting table. Docking grooves extending up and down are opened on the sides of the docking seats away from the corresponding fixing plates II.

[0012] Preferably, the transverse traction part includes electric sliders symmetrically slidably arranged on the second guide rail. A U-shaped table that moves left and right along the second guide rail is jointly fixed on the upper sides of the symmetrically arranged electric sliders. Traction shafts slidably connected to the corresponding docking grooves are symmetrically fixed on the opposite sides of the vertical sections on the left and right of the U-shaped table before and after. The middle sections of the traction shafts are located inside the corresponding docking grooves.

[0013] Preferably, the lifting drive part includes a second cylinder fixedly arranged on the upper side of the bottom plate. A connecting platform that moves up and down is fixedly arranged at the telescopic end of the second cylinder. Blocks are fixedly arranged at the lower sides of the opposite ends of the connecting platform symmetrically in the front and back through connecting rods.

[0014] Preferably, the driven lifting part includes a shock platform that moves up and down and is slidably arranged on the symmetric guide columns in the front and back. L-shaped driven plates are symmetrically and fixedly arranged on the front and back sides of the shock platform. Notches for the corresponding connecting rods to move up and down through are formed on the sides of the horizontal sections of the L-shaped driven plates away from the corresponding vertical sections.

[0015] Preferably, the impact adjustment part includes multiple groups of receiving sleeves fixedly arranged evenly from left to right on the lower side of the shock platform. Each group consists of multiple receiving sleeves evenly distributed in the front and back. A receiving groove that penetrates up and down is formed on the shock platform and the receiving sleeves together. Multiple rectangular grooves that are in one-to-one correspondence and communicate with the corresponding receiving grooves are evenly formed on the upper surface of the shock platform. Impact piles with their lower ends extending out are slidably arranged in the receiving sleeves. Return-shaped frames that are slidably inserted into the corresponding rectangular grooves are fixedly arranged on the upper sides of the impact piles. Slots that penetrate from left to right are formed on the return-shaped frames. Handles are symmetrically and fixedly arranged on the upper sides of the return-shaped frames in the front and back. An installation plate that is slidably inserted into the corresponding slot is arranged on the upper side of the return-shaped frame and between the corresponding handles. The installation plate is installed on the upper side of the shock platform through bolts. Buffer pads two are symmetrically and fixedly arranged on the upper and lower sides of the installation plate.

[0016] Preferably, the clamping drive part includes third cylinders symmetrically and fixedly arranged on the upper side of the shock platform through second supports. A connecting plate two that moves back and forth is fixedly arranged at the telescopic end of the third cylinder. U-shaped drive plates with openings facing the corresponding guide columns are symmetrically and fixedly arranged on the left and right sides of the connecting plate two. Oblique linear grooves that penetrate up and down are formed on the symmetric horizontal sections of the U-shaped drive plates.

[0017] Preferably, the driven clamping part includes two groups of guide rods symmetrically arranged on the front and back sides of the guide columns. Each group consists of guide rods that are symmetrically arranged up and down. The two groups of guide rods symmetrically in the front and back are fixedly arranged on the upper side of the shock platform through third supports that are symmetrically arranged left and right. U-shaped clamping blocks located inside the corresponding U-shaped drive plates are symmetrically and slidably arranged on the two groups of guide rods symmetrically in the front and back. Damping pads two are fixedly arranged on the opposite sides of the symmetric U-shaped clamping blocks. Slide shafts that are slidably matched with the corresponding oblique linear grooves are symmetrically and fixedly arranged on the upper and lower sides of the U-shaped clamping blocks.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the lifting mechanism, the present invention can apply targeted impact to a single area of the battery pack or apply composite impact to different areas synchronously, and can simulate the extrusion force continuously exerted by the pile body on the battery pack under the influence of the vehicle's own weight during the collision impact. Therefore, not only can the independent impact resistance performance of each area of the battery pack be tested targeted, but also the actual comprehensive structural performance of the battery pack under the action of multi-point composite impact can be tested, ensuring that the simulated test state of the battery pack is more in line with the actual collision situation, exposing the structural defects of the battery pack that are difficult to capture under single-point impact, and thus improving the accuracy and reliability of the simulated collision test results.

[0019] 2. Through the cooperation of the transverse movement mechanism and the lifting mechanism, the present invention can drive the battery pack to move horizontally synchronously during the vertical impact on the battery pack, so as to simulate the composite stress state of the battery pack under the influence of vehicle inertia during actual collision, and thus reproduce the composite failure state of the battery pack caused by continuous extrusion, friction slip and dynamic shear during actual collision. Furthermore, the simulated test conditions of the battery pack are closer to the energy transfer and stress distribution characteristics of real collision, which can not only expose the structural defects that are difficult to find in the static test of the battery pack, but also evaluate the stability and reliability attenuation trend of the battery pack during dynamic deformation, providing more comprehensive data support for the overall safety performance optimization of the battery pack and the risk control of real vehicle test.

[0020] 3. Through the cooperation of the transverse movement mechanism, the lifting mechanism and the clamping mechanism, the present invention can accurately simulate the vertical extrusion force exerted by the pile body on the battery pack under the action of the vehicle's own weight, and drive the battery pack to move horizontally to test the influence of lateral extrusion friction on the overall structural stability of the battery pack in the state of no impact or weak impact. Therefore, the potential structural defects of the battery pack can be further evaluated and tested based on the test data under the actual collision mode, and thus the comprehensiveness and accuracy of the data obtained from the comprehensive structural performance test of the battery pack are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the present invention.

[0022] Figure 2 It is a partial sectional view of a part of the transverse movement mechanism.

[0023] Figure 3 It is Figure 2 The enlarged view at A in

[0024] Figure 4 It is a partial sectional view of a part of the lateral traction part.

[0025] Figure 5 It is a partial sectional view of a part of the lifting mechanism.

[0026] Figure 6 It is a partial cross-sectional diagram of the structure of the clamping mechanism.

[0027] Figure 7 It is a partial cross-sectional diagram of the structure of the driven clamping part.

[0028] In the figure: 1. Bottom plate; 2. Transverse movement mechanism; 21. Guide rail 1; 22. Guide rail 2; 23. Mounting and positioning part; 231. Mounting platform; 232. Cylinder 1; 233. Positioning clamp; 24. Transverse movement part; 241. Fixed plate 1; 242. Moving wheel; 25. Traction docking part; 251. Fixed plate 2; 252. Docking seat; 253. Docking groove; 26. Transverse traction part; 261. Electric slider; 262. U-shaped platform; 263. Traction shaft; 3. Lifting mechanism; 31. Lifting drive part; 3 11. Cylinder 2; 312. Connecting platform; 313. Support block; 32. Guide column; 33. Driven lifting part; 331. Impact platform; 332. L-shaped driven plate; 34. Impact adjustment part; 341. Storage sleeve; 342. Impact pile; 343. Return frame; 344. Mounting plate; 4. Clamping mechanism; 41. Clamping drive part; 411. Cylinder 3; 412. U-shaped drive plate; 413. Oblique linear groove; 42. Driven clamping part; 421. Guide rod; 422. U-shaped clamping block; 423. Sliding shaft. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1 A new energy vehicle battery pack collision test device includes a base plate 1, a transverse movement mechanism 2 is provided on the upper side of the base plate 1, a lifting mechanism 3 is provided on the outer side of the transverse movement mechanism 2, and a clamping mechanism 4 is provided on the lifting mechanism 3.

[0031] See also Figure 1 and Figure 2 The transverse movement mechanism 2 includes a guide rail 1 21 fixedly arranged on the upper side of the base plate 1 through a pad symmetrically in the front and rear directions, a guide rail 22 is fixedly arranged on the upper side of the base plate 1 and between the pads, a mounting positioning portion 23 for fixing the battery pack is provided on the guide rail 1 21, a transverse moving portion 24 is provided on the lower side of the mounting positioning portion 23 and cooperates with the corresponding guide rail 1 21 for sliding guidance, a traction docking portion 25 is provided on the mounting positioning portion 23, and a transverse traction portion 26 is provided on the guide rail 22 to cooperate with the traction docking portion 25 to drive the mounting positioning portion 23 to move transversely.

[0032] Please refer to Figure 1 and Figure 2 The installation and positioning part 23 includes an installation table 231 that moves left and right along the first guide rail 21. A first buffer pad is fixedly arranged on the lower surface inside the installation table 231. The first buffer pad is used to buffer the impact force between the battery pack and the installation table 231. First cylinders 232 are fixedly arranged symmetrically in the front and back on the installation table 231. A connecting plate one that moves back and forth is fixedly arranged at the telescopic end of the first cylinder 232. Slide rods that are slidably connected to the corresponding side walls of the installation table 231 are fixedly arranged symmetrically in the left and right on the side of the connecting plate one close to the corresponding first cylinder 232. Positioning clamping plates 233 are fixedly arranged symmetrically in the up and down on the side of the connecting plate one far from the corresponding first cylinder 232. A first damping pad is fixedly arranged on the side of the positioning clamping plate 233 far from the corresponding connecting plate one.

[0033] Place the bottom of the battery pack upward and align it into the installation table 231. Then, drive the corresponding connecting plate one and positioning clamping plate 233 to move towards the battery pack through the first cylinder 232 until the symmetrically arranged positioning clamping plates 233 on the left and right firmly clamp and fix the battery pack. The first damping pad can not only ensure the stability of the clamping and positioning of the battery pack, but also prevent the positioning clamping plate 233 from wearing the side wall of its outer shell when the battery pack is impacted.

[0034] Please refer to Figure 2 and Figure 4 The lateral movement part 24 includes first fixing plates 241 fixedly arranged at the four corners of the lower surface of the installation table 231. The first fixing plates 241 are located in the corresponding first guide rails 21. Two groups of ball bearings are symmetrically arranged in the front and back on the first fixing plates 241. Each group consists of a plurality of ball bearings evenly distributed in the left and right. A plurality of moving wheels 242 are evenly rotatably arranged in the left and right through a first support on the lower side of the first fixing plate 241.

[0035] When the installation table 231 and the first fixing plate 241 move left and right along the first guide rail 21, the ball bearings on the first fixing plate 241 can greatly reduce the frictional resistance with the inner side wall of the corresponding first guide rail 21, and the moving wheels 242 on the lower side of the first fixing plate 241 can greatly reduce the frictional resistance with the inner lower surface of the corresponding first guide rail 21, so as to ensure that the first guide rail 21 can stably guide the installation table 231 and the first fixing plate 241.

[0036] Please refer to Figure 1 、 Figure 2 and Figure 3 The traction and docking part 25 includes second fixing plates 251 fixedly arranged symmetrically in the front and back on the installation table 231. Docking seats 252 are fixedly arranged symmetrically in the front and back on the side of the second fixing plate 251 far from the installation table 231. A docking groove 253 extending up and down is arranged on the side of the docking seat 252 far from the corresponding second fixing plate 251.

[0037] Please refer to Figure 2 、Figure 3 and Figure 4 The lateral traction part 26 includes electric sliders 261 symmetrically arranged left and right and slidably arranged on the second guide rail 22. A U-shaped table 262 that moves left and right along the second guide rail 22 is fixedly arranged on the upper sides of the symmetrically arranged electric sliders 261 left and right. Traction shafts 263 slidably connected to the corresponding docking grooves 253 are symmetrically and vertically fixed on the opposite sides of the left and right symmetric vertical sections of the U-shaped table 262 in the front and back. The middle sections of the traction shafts 263 are located inside the corresponding docking grooves 253.

[0038] The electric slider 261 drives the U-shaped table 262 and the traction shaft 263 to move left and right along the second guide rail 22. The traction shaft 263 drives the corresponding fixing plate two 251 and the mounting table 231 to move left and right synchronously through the corresponding docking seat 252. When the battery pack fixed inside the mounting table 231 is vertically impacted, the traction shaft 263 moves slightly up and down relative to the corresponding docking groove 253, so as to avoid the direct contact of the vertical impact force of the impact with the traction shaft 263, so that the traction shaft 263 can always stably drive the mounting table 231 to move left and right.

[0039] Please refer to Figure 1 As shown in FIGS.

[0040] Please refer to Figure 1 and Figure 5 The lifting driving part 3 includes lifting driving parts 31 symmetrically arranged front and back on the upper side of the bottom plate 1. Guide columns 32 are symmetrically fixed on the upper side of the bottom plate 1 and between the lifting driving parts 31. A driven lifting part 33 that cooperates with the lifting driving part 31 to lift is arranged on the symmetrically arranged guide columns 32 front and back. An impact adjusting part 34 for performing impact tests on different areas of the battery pack is arranged on the driven lifting part 33.

[0041] Please refer to Figure 1 and Figure 5 The driven lifting part 33 includes an impact table 331 that moves up and down and is slidably arranged on the symmetrically arranged guide columns 32 front and back. L-shaped driven plates 332 are symmetrically fixed on the front and back sides of the impact table 331. Notches for the corresponding connecting rods to move up and down through are formed on the sides of the horizontal sections of the L-shaped driven plates 332 far from the corresponding vertical sections.

[0042] The cylinder two 311 drives the connecting platform 312 to move upward. The connecting platform 312 then drives the corresponding supporting block 313 to move upward synchronously through the corresponding connecting rod. The supporting block 313 then fits against the lower surface of the horizontal section of the corresponding L-shaped driven plate 332, and drives the impact platform 331 to move upward along the guiding column 32 to the required height through the L-shaped driven plate 332. Then, the impact platform 331 is locked and positioned at the current height through the clamping mechanism 4, and the cylinder two 311 drives the corresponding supporting block 313 to move downward until it is below the mounting table 231. At this time, the clamping mechanism 4 can be used to release the locking of the impact platform 331, so that the impact platform 331 freely falls along the guiding column 32 from the required height.

[0043] Please refer to Figure 1 、 Figure 5 and Figure 6 As shown in, the impact adjustment part 34 includes multiple groups of receiving sleeves 341 uniformly and fixedly arranged on the lower side of the impact platform 331 from left to right. Each group consists of multiple receiving sleeves 341 uniformly distributed from front to back. The impact platform 331 and the receiving sleeves 341 are jointly provided with a receiving groove penetrating up and down. The upper surface of the impact platform 331 is uniformly provided with a plurality of rectangular grooves corresponding to and communicating with the corresponding receiving grooves. A striking pile 342 with its lower end protruding is slidably arranged in the receiving sleeve 341. A return frame 343 slidably inserted into the corresponding rectangular groove is fixedly arranged on the upper side of the striking pile 342. A slot penetrating left and right is provided on the return frame 343. Lifting handles are symmetrically and fixedly arranged on the upper side of the return frame 343 from front to back. An installation plate 344 slidably inserted into the corresponding slot is arranged on the upper side of the return frame 343 and between the corresponding lifting handles. The installation plate 344 is installed on the upper side of the impact platform 331 through bolts. Buffer pads two are symmetrically and fixedly arranged on the upper and lower sides of the installation plate 344, and the buffer pads two are used to buffer the impact force between the installation plate 344 and the corresponding return frame 343.

[0044] The corresponding installation plate 344 is removed from the upper side of the impact platform 331 by removing the bolts. Then, the corresponding return frame 343 and the striking pile 342 are lifted upward through the lifting handle until the striking pile 342 is completely received into the receiving sleeve 341. At this time, the installation plate 344 can be just inserted into the slot inside the corresponding return frame 343, and the installation plate 344 is installed on the impact platform 331 again through bolts, so as to stably position the striking pile 342 in the corresponding receiving sleeve 341.

[0045] When adjusting the impact area of the battery pack in the installation table 231, the impact pile 342 above the area where the battery pack does not need to be impacted is stably received into the corresponding receiving sleeve 341 through the mounting plate 344, and the impact pile 342 above the area where the battery pack needs to be impacted stably extends downward out of the corresponding receiving sleeve 341. Then, the support block 313 drives the impact table 331 and the extended impact pile 342 to move upward along the guide post 32 to the required height, and the impact table 331 and the impact pile 342 freely fall along the guide post 32 from the required height through the cooperation of the clamping mechanism 4, so that the remaining impact piles 342 stably impact the area of the battery pack that needs to be impacted. At the same time, under the action of the overall self-weight of the impact pile 342 and the impact table 331, a squeezing force can also be continuously applied to the bottom of the battery pack.

[0046] The above operation method can achieve targeted impact on a single area of the battery pack or synchronous composite impact on different areas by flexibly adjusting the impact pile 342, and can simulate the squeezing force continuously applied by the impact pile 342 to the battery pack under the influence of the vehicle's self-weight during the collision impact, so as to ensure that the simulated test state of the battery pack is more in line with the actual collision situation and improve the accuracy and reliability of the simulated collision test results.

[0047] When simulating the composite stress state of the battery pack under the influence of vehicle inertia during the actual collision process, if the battery pack moves to the right under the drive of the traction shaft 263, the lower end of the impact pile 342 at a specific position in the right-edge area of the impact table 331 is positioned below the corresponding receiving sleeve 341 through the mounting plate 344, and the impact piles 342 at other positions are stably received into the corresponding receiving sleeves 341 to simulate the situation of the vehicle colliding with an obstacle during the actual directional driving process. Then, the impact table 331 drives the extended impact pile 342 to freely fall downward from the required height, and at the same time, the traction shaft 263 drives the battery pack to move to the right synchronously. The extended impact pile 342 impacts the bottom of the battery pack and at the same time moves relative to the battery pack until the moving battery pack is completely separated from the impact pile 342.

[0048] The above operation method can reproduce the composite failure state of the battery pack caused by continuous extrusion, frictional slip and dynamic shear during the actual collision, so that the simulated test conditions of the battery pack are closer to the energy transfer and stress distribution characteristics of the real collision, providing more comprehensive data support for the overall safety performance optimization of the battery pack and the risk control of the actual vehicle test.

[0049] Please refer to Figure 1 and Figure 5 The clamping mechanism 4 includes a clamping drive part 41 arranged on the driven lifting part 33 and a driven clamping part 42 that cooperates with the clamping drive part 41 to lock and position the driven lifting part 33 at any position on the guide post 32.

[0050] Please refer to Figure 5 、 Figure 6 and Figure 7 , the clamping driving part 41 includes a cylinder three 411 symmetrically and fixedly arranged on the upper side of the impact table 331 before and after through a second support. A connecting plate two that moves back and forth is fixedly arranged at the telescopic end of the cylinder three 411. U-shaped driving plates 412 with openings facing the corresponding guide posts 32 are symmetrically and fixedly arranged on the left and right sides of the connecting plate two. Oblique linear grooves 413 that penetrate up and down are formed on the horizontally symmetrical sections of the U-shaped driving plates 412 symmetrically up and down.

[0051] Please refer to Figure 5 、 Figure 6 and Figure 7 , the driven clamping part 42 includes two groups of guide rods 421 symmetrically arranged on the front and rear sides of the guide post 32. Each group consists of guide rods 421 that are symmetrically up and down. The two groups of guide rods 421 that are symmetrically arranged before and after are fixedly arranged on the upper side of the impact table 331 through supports three that are symmetrically arranged left and right. U-shaped clamping blocks 422 located inside the corresponding U-shaped driving plates 412 are symmetrically slidably arranged on the two groups of guide rods 421 that are symmetrically arranged before and after. Damping pads two are fixedly arranged on the opposite sides of the U-shaped clamping blocks 422 that are symmetrically arranged left and right. Slide shafts 423 that are slidably matched with the corresponding oblique linear grooves 413 are symmetrically and fixedly arranged on the upper and lower sides of the U-shaped clamping blocks 422.

[0052] The cylinder three 411 drives the connecting plate two to move a specific distance in the direction of the corresponding guide post 32. The connecting plate two then drives the corresponding U-shaped driving plate 412 to move synchronously. The U-shaped driving plate 412 then drives the oblique linear groove 413 to be slidably matched with the corresponding slide shaft 423. The slide shaft 423 then drives the U-shaped clamping block 422 to slide along the guide rod 421 towards the corresponding guide post 32 until the U-shaped clamping blocks 422 that are symmetrically arranged left and right stably clamp and lock the guide post 32, thereby realizing the stable locking and positioning of the impact table 331 at any position on the guide post 32. Among them, the damping pad two can improve the clamping stability of the U-shaped clamping block 422.

[0053] The supporting block 313 drives the impact pile 342 protruding at the required position to be stably pressed against the bottom of the battery pack, and the U-shaped clamping block 422 stably locks the impact table 331 at the current position. Then, the traction shaft 263 drives the mounting table 231 and the battery pack to move directionally, so that the battery pack and the impact pile 342 stably move relative to each other in a non-impact state, in order to test the influence of lateral extrusion friction on the overall structural stability of the battery pack in a non-impact or weak-impact state. Thus, the potential structural defects of the battery pack can be further evaluated and inspected based on the test data in the actual collision mode, and further ensure the comprehensiveness and accuracy of the data obtained from the comprehensive structural performance test of the battery pack.

[0054] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A collision test device for a new energy vehicle battery pack, comprising a bottom plate, characterized in that: A transverse movement mechanism is arranged on the upper side of the bottom plate, a lifting mechanism is arranged on the outer side of the transverse movement mechanism, and a clamping mechanism is arranged on the lifting mechanism; The transverse movement mechanism includes a first guide rail symmetrically fixed on the upper side of the bottom plate before and after through a cushion plate, a second guide rail is fixedly arranged on the upper side of the bottom plate and between the cushion plates, an installation and positioning part for fixing the battery pack is arranged on the first guide rail, a transverse movement part slidably matched with the corresponding first guide rail is arranged on the lower side of the installation and positioning part, a traction docking part is arranged on the installation and positioning part, and a transverse traction part for driving the installation and positioning part to move transversely in cooperation with the traction docking part is arranged on the second guide rail; The lifting mechanism includes lifting driving parts symmetrically arranged on the upper side of the bottom plate before and after, guide columns are symmetrically and fixedly arranged on the upper side of the bottom plate and between the lifting driving parts before and after, a driven lifting part that is lifted in cooperation with the lifting driving parts is jointly arranged on the symmetrically arranged guide columns before and after, and an impact adjustment part for performing impact tests on different areas of the battery pack is arranged on the driven lifting part; The clamping mechanism includes a clamping driving part arranged on the driven lifting part and a driven clamping part that cooperates with the clamping driving part to lock and position the driven lifting part on the guide column; The lifting driving part includes a second cylinder fixedly arranged on the upper side of the bottom plate, a connecting platform that moves up and down is fixedly arranged at the telescopic end of the second cylinder, and a support block is fixedly arranged at the lower side of the opposite ends of the symmetrically arranged connecting platforms before and after through a connecting rod; The driven lifting part includes an impact platform that moves up and down and is jointly slidably arranged on the symmetrically arranged guide columns before and after; The impact adjustment part includes a plurality of sets of receiving sleeves evenly fixed on the lower side of the impact platform from left to right, each set consists of a plurality of receiving sleeves evenly distributed before and after, a receiving groove that penetrates up and down is jointly opened on the impact platform and the receiving sleeve, a plurality of rectangular grooves corresponding to the receiving grooves one by one are evenly opened on the upper surface of the impact platform, an impact pile with its lower end extending out is slidably arranged in the receiving sleeve, a return frame slidably inserted into the corresponding rectangular groove is fixedly arranged on the upper side of the impact pile, a slot that penetrates left and right is opened on the return frame, a handle is symmetrically and fixedly arranged on the upper side of the return frame before and after, an installation plate slidably inserted into the corresponding slot is arranged on the upper side of the return frame and between the corresponding handles, the installation plate is installed on the upper side of the impact platform through bolts, and buffer pads II are symmetrically fixed on the upper and lower sides of the installation plate.

2. The new energy vehicle battery pack collision test device according to claim 1, characterized in that: The installation and positioning part includes an installation table that moves left and right along the first guide rail, a buffer pad I is fixedly arranged on the lower surface inside the installation table, cylinders I are symmetrically and fixedly arranged on the installation table before and after, a connecting plate I that moves back and forth is fixedly arranged at the telescopic end of the cylinder I, sliding rods slidably connected to the corresponding side walls of the installation table are symmetrically fixed on the side of the connecting plate I close to the corresponding cylinder I, positioning clamping plates are symmetrically fixed on the side of the connecting plate I far from the corresponding cylinder I, and a damping pad I is fixedly arranged on the side of the positioning clamping plate far from the corresponding connecting plate I.

3. The new energy vehicle battery pack collision test device according to claim 2, characterized in that: The transverse movement part includes fixing plates I fixedly arranged at the four corners of the lower surface of the installation table, the fixing plates I are located in the corresponding first guide rails, two groups of balls are symmetrically arranged on the fixing plates I before and after, each group consists of a plurality of balls evenly distributed from left to right, and a plurality of moving wheels are evenly rotatably arranged on the lower side of the fixing plates I through supports I.

4. The new energy vehicle battery pack collision test device according to claim 2, characterized in that: The traction docking part includes fixing plates II symmetrically arranged before and after and fixedly arranged on the mounting table. On the side of the fixing plate II far from the mounting table, docking seats are symmetrically arranged before and after. On the side of the docking seat far from the corresponding fixing plate II, a docking groove extending vertically is provided.

5. The collision test device for a new energy vehicle battery pack according to claim 4, characterized in that: The lateral traction part includes electric sliders symmetrically arranged left and right and slidably arranged on the guide rail II. On the upper sides of the symmetrically arranged electric sliders left and right, a U-shaped table moving left and right along the guide rail II is fixedly arranged. On the opposite sides of the symmetrically arranged vertical sections of the U-shaped table left and right, traction shafts slidably connected with the corresponding docking grooves are symmetrically arranged before and after. The middle section of the traction shaft is located inside the corresponding docking groove.

6. The collision test device for a new energy vehicle battery pack according to claim 1, characterized in that: L-shaped driven plates are symmetrically arranged before and after on both sides of the impact table. On the side of the horizontal section of the L-shaped driven plate far from the corresponding vertical section, a notch is provided for the corresponding connecting rod to penetrate up and down.

7. An impact test device for a new energy vehicle battery pack according to claim 6, characterized in that: The clamping driving part includes cylinders III symmetrically arranged before and after and fixedly arranged on the upper side of the impact table through supports II. The telescopic ends of the cylinders III are fixedly provided with connecting plates II moving back and forth. On the left and right sides of the connecting plate II, U-shaped driving plates with openings facing the corresponding guide columns are symmetrically arranged. Oblique linear grooves penetrating up and down are provided on the symmetrically arranged upper and lower horizontal sections of the U-shaped driving plate.

8. A new energy vehicle battery pack collision test device according to claim 7, characterized in that: The driven clamping part includes two groups of guide rods symmetrically arranged on the front and rear sides of the guide columns. Each group consists of guide rods symmetrically arranged up and down. The two groups of symmetrically arranged guide rods before and after are fixedly arranged on the upper side of the impact table through supports III symmetrically arranged left and right. On the two groups of symmetrically arranged guide rods before and after, U-shaped clamping blocks located inside the corresponding U-shaped driving plates are symmetrically slidably arranged left and right. On the opposite sides of the symmetrically arranged U-shaped clamping blocks left and right, damping pads II are fixedly arranged. On the upper and lower sides of the U-shaped clamping blocks, sliding shafts slidably matched with the corresponding oblique linear grooves are symmetrically arranged.

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