Impact testing device and method for a skateboard chassis of a pure electric passenger car
By designing a chassis testing device for pure electric passenger vehicles that combines horizontal and vertical impacts, the problem of difficulty in simulating actual accident scenarios in existing technologies has been solved, enabling more accurate chassis testing and damage analysis, and improving the safety of electric vehicles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JILIN UNIVERSITY
- Filing Date
- 2024-09-27
- Publication Date
- 2026-05-22
AI Technical Summary
Existing testing methods for pure electric vehicle chassis are difficult to simulate real-world accident scenarios, especially the impact of a vehicle being struck by a sharp object while in motion, resulting in inaccurate test results.
An impact testing device was designed, comprising a mobile main body module, a support module, a monitoring module, a control module, and a power module. The position of the impact module is changed by adjusting the position of the support module. By combining horizontal and vertical impacts, the impact during actual driving is simulated. The monitoring module acquires data in real time, and the control module calculates the trigger point of the impact test.
It improves the accuracy and efficiency of chassis testing for pure electric passenger vehicles, enabling more realistic simulation of impacts during actual driving, analysis of damage and battery deformation, and providing a scientific and effective testing method for the safety of pure electric passenger vehicles.
Smart Images
Figure CN119147282B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive safety performance testing technology, and in particular to an impact testing device and method for a pure electric passenger vehicle with a skateboard chassis. Background Technology
[0002] Battery-chassis integration (CTC) technology is a crucial approach to further improve the space utilization, range, body rigidity, and cost control of electric vehicles. A chassis employing CTC technology is not only an actuator in an electric vehicle but also a key component ensuring the safety of the power battery pack. This places higher demands on the chassis's structural design, safety performance, and reliability. However, current research and development for pure electric vehicles primarily focuses on batteries and electronic control systems, while traditional techniques are still used in performance testing. This has resulted in a lack of research on key structural components of electric vehicles. As a vital component of a car, the chassis's operating characteristics directly impact the safety of the vehicle and its occupants. In particular, since most electric vehicle batteries are installed inside the chassis, collisions or scratches with sharp objects can easily damage the chassis, potentially causing the battery to ignite violently due to external forces, leading to spontaneous combustion incidents. Therefore, conducting comprehensive performance testing and analysis of electric vehicle chassis safety is of great significance.
[0003] Existing testing requirements for new energy vehicle skateboard chassis mainly include bottom scraping tests and chassis impact tests in a stationary state. However, since the vehicle is stationary, there is only a vertical relative velocity between the impact head and the chassis, and no relative velocity between the impact object and the chassis in the direction of travel. As a result, the test results are difficult to fully reproduce the actual accident scenario. Summary of the Invention
[0004] The purpose of this invention is to provide an impact testing device and method for a pure electric passenger vehicle's skateboard chassis, in order to solve the problems existing in the prior art, simulate the actual situation of a pure electric passenger vehicle's skateboard chassis in a collision, and improve the accuracy of pure electric passenger vehicle chassis testing.
[0005] To achieve the above objectives, the present invention provides the following solution:
[0006] This invention provides an impact testing device for a pure electric passenger vehicle's skateboard chassis, comprising a mobile main module, an impact module, a support module, a monitoring module, a control module, and a power module. The mobile main module is movable, and the support module is movably mounted on the mobile main module and can reciprocate on it. The impact module is installed within the support module, and its impact direction is vertical. The upper end of the impact module acts on the lower end of the skateboard chassis. The monitoring module monitors the impact velocity and acceleration of the impact module, the horizontal velocity of the mobile main module, and the distance between the mobile main module and the impact point on the skateboard chassis. The monitoring module is electrically connected to the control module, and the control module calculates the trigger point for the impact test based on the data monitored by the monitoring module. The power module is connected to the mobile main module and... The moving main module is used to drive the moving main module. A position adjustment module is installed on the upper end of the moving main module, and the support module is installed on the position adjustment module. The impact module includes a driving impact unit and a driven impact unit. The lower end of the driving impact unit is installed on the lower end of the support module, and the driving impact unit and the driven impact unit are coaxially arranged. In the initial state, the upper end of the driving impact unit and the lower end of the driven impact unit do not contact each other, and the upper end of the driven impact unit is connected to the upper end of the support module. The driving impact unit includes a cylinder rod and a cylinder barrel. One end of the cylinder rod extends into the cylinder barrel and is connected, and the end of the cylinder rod away from the cylinder barrel does not contact the driven impact unit. The driven impact unit includes an impact cylinder, a front impact head, and a rear impact head. The impact cylinder is located on the outer periphery of the front impact head and the rear impact head, and the upper end of the rear impact head is connected to the lower end of the front impact head.
[0007] Preferably, the moving main body module includes a power element, a braking element, and a mounting frame. The power element is located at the lower end of the mounting frame and is used to provide moving power to the mounting frame. The braking element is connected to the power element and is used to provide braking force to the mounting frame. The support module can reciprocate in the horizontal direction under the drive of the position adjustment module, and the moving direction of the support module is perpendicular to the moving direction of the moving main body module.
[0008] Preferably, the position adjustment module includes a ball screw, a screw slider, a platform, multiple guide rail sliders, and multiple fixed guide rails. The end of the ball screw is mounted on the moving main body module via a support base, and the outer periphery of the ball screw is movably connected to the screw slider. Each of the fixed guide rails is parallel to the ball screw, and each of the fixed guide rails is slidably connected to the guide rail slider. Both the guide rail slider and the screw slider are connected to the upper end of the platform, and the platform is connected to the support module.
[0009] Preferably, the support module includes a vertical support frame and diagonal braces. The vertical support frame is vertically mounted on the upper end of the position adjustment module. The impact module is installed inside the vertical support frame, and the impact end of the impact module can extend through the upper end of the vertical support frame. The lower end of the diagonal brace is rotatably mounted on the position adjustment module via a movable hinge support. The upper end of the diagonal brace is mounted on one side of the vertical support frame via the movable hinge support and is positioned close to the upper end of the movable hinge support. The upper end of the vertical support frame is connected to the upper end of the impact module via a connecting plate, and the lower end of the vertical support frame is connected to the position adjustment module via a long connecting plate and a short connecting plate.
[0010] Preferably, a flange is installed at each of the upper and lower ends of the prime mover impact unit, an upper enclosure is provided on the outer periphery of the upper end of the support module, and a lower enclosure is provided on the outer periphery of the lower end of the support module. The flange at the upper end of the prime mover impact unit is connected to the upper enclosure through an upper large flange, and the flange at the lower end of the prime mover impact unit is connected to the lower enclosure through a lower large flange.
[0011] Preferably, the cylinder is supplied with air from an air tank. A quick-release valve and an intake valve are also installed on the cylinder. The quick-release valve and the intake valve are connected to the air tank via air pipes. The cylinder is wirelessly controlled and controlled by a solenoid valve in conjunction with an electrical control box. An upper buffer pad is installed at the upper end of the support module, allowing the upper end of the front impact head to extend. A lower buffer pad is installed at the lower end of the impact cylinder. A lower patterned disc is connected to the lower end of the lower buffer pad, and an upper patterned disc is connected to the upper end of the upper buffer pad. Both the upper and lower patterned discs are connected to the ends of the impact cylinder. A linear bearing is fitted around the outer periphery of the rear impact head. A sleeve is provided at the upper end of the linear bearing, and the lower end of the linear bearing is limited to a shoulder on the inner wall of the impact cylinder. The sleeve is fitted around the outer periphery of the lower end of the front impact head, and the lower end of the sleeve abuts against another shoulder on the inner wall of the impact cylinder. The sleeve is fixed inside the impact cylinder by a set screw.
[0012] Preferably, the monitoring module includes a force sensor, a first speed sensor, a second speed sensor, and a distance sensor. The force sensor is installed between the front impact head and the rear impact head, the first speed sensor is installed on the front impact head, and the second speed sensor and the distance sensor are both installed on the moving main body module.
[0013] Preferably, the power module is an impact power assembly, which includes an impact cylinder assembly, a cylinder frame, and a guide rail. The guide rail and the cylinder frame are both mounted on the ground, and the guide rail is used to provide guidance when the mobile main module moves. The impact cylinder assembly is mounted on the cylinder frame, and the impact direction of the impact cylinder assembly is consistent with the moving direction of the mobile main module.
[0014] Preferably, the power module is a traction power assembly, which includes a winch, a traction cable, a traction slider, a hooked cable, and a traction guide rail. The traction guide rail is installed underground. The two ends of the traction cable are respectively connected to the winch and the traction slider. The traction slider is installed on the traction guide rail. The two ends of the hooked cable are respectively connected to the traction slider and the moving main module.
[0015] The present invention also provides an impact testing method for a pure electric passenger vehicle with a skateboard chassis, and the impact testing device for a pure electric passenger vehicle with a skateboard chassis using any of the above technical solutions includes the following steps:
[0016] S1. Move the test pure electric passenger vehicle's skateboard chassis to the designated position, and use a test bench or lift to lift the test pure electric passenger vehicle's skateboard chassis to the test height and fix it.
[0017] S2. Connect the impact testing device of the pure electric passenger vehicle skateboard chassis to the guide rail or to the hooked steel cable, and place the cylinder barrel and cylinder rod in the prime mover impact unit in the initial position;
[0018] S3. Determine the impact position on the skateboard chassis of the pure electric passenger vehicle under test, adjust the position adjustment module, and ensure that the impact testing device of the skateboard chassis of the pure electric passenger vehicle can reach the required impact position when moving. Adjust the parameters in the control module program to make the actual impact position coincide with the required impact position.
[0019] S4. Start the test. The impact test device of the pure electric passenger vehicle skateboard chassis is accelerated to the predetermined speed by the traction power component or the impact power component. The impact test device of the pure electric passenger vehicle skateboard chassis will autonomously complete the fixed-point impact action during the operation of the program. After the impact is completed, the impact test device of the pure electric passenger vehicle skateboard chassis is braked by the braking element until it comes to a complete stop. Then, the power component is used to drive the impact test device of the pure electric passenger vehicle skateboard chassis back to the initial position of the test. During the impact, the high-speed camera is used to capture and store the images.
[0020] S5. Repeat the test multiple times to obtain the results of different positions of the tested pure electric passenger vehicle's skateboard chassis after being subjected to impact, and observe whether the battery is deformed or damaged, and analyze the changes of different tested pure electric passenger vehicle skateboard chassis after being subjected to impact.
[0021] The present invention achieves the following technical effects compared to the prior art:
[0022] The present invention provides an impact testing device and method for a pure electric passenger vehicle's skateboard chassis. The movable main module is movable, facilitating reset after testing. A support module is movably mounted on the movable main module and can reciprocate on it. Adjusting the position of the support module changes the position of the impact module, ensuring it aligns with the impact point during movement, thus improving testing accuracy and efficiency. The impact module is installed within the support module, and its impact direction is vertical. The upper end of the impact module acts on the lower end of the skateboard chassis to simulate vertical impact. A monitoring module monitors the impact velocity and acceleration of the impact module, the horizontal velocity of the movable main module, and the movement... The distance between the main module and the impact point on the skateboard chassis is used to acquire various data in the impact test in real time. The monitoring module is electrically connected to the control module, and the control module is used to calculate the trigger point of the impact test based on the data monitored by the monitoring module, thereby improving the test accuracy. The power module is connected to the moving main module and is used to drive the moving main module to realize the impact simulation in the horizontal direction. By combining horizontal and vertical impacts, the impact test can more closely resemble the impact that the skateboard chassis of a pure electric passenger vehicle may experience during driving, and the damage and failure situation can be analyzed in situ. This provides a dedicated and reliable impact testing device and method for testing the skateboard chassis of pure electric passenger vehicles, and provides a scientific and effective method and technology for improving the safety of pure electric passenger vehicles. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the impact testing device for the skateboard chassis of a pure electric passenger vehicle in Example 1.
[0025] Figure 2 This is a schematic diagram of the position adjustment module in Embodiment 1;
[0026] Figure 3This is a schematic diagram of the impact module in Example 1;
[0027] Figure 4 This is a schematic diagram of the horizontal velocity provided by the impact power assembly in Embodiment 1;
[0028] Figure 5 This is a schematic diagram of the horizontal speed provided by the traction power assembly in Embodiment 1;
[0029] In the diagram: 101-Electrical box, 102-Pneumatic tire, 103-Brake element, 201-Cylinder rod, 202-Flange, 203-Quick exhaust valve, 204-Cylinder barrel, 205-Intake valve, 206-Lower enclosure, 207-Lower large flange, 208-Upper enclosure, 209-Upper large flange, 210-Air tank, 211-Air pipe, 301-Upper disc, 302-Upper buffer pad, 303-Front impact head, 304-Sleeve, 305-Rear impact head, 306-Linear bearing, 307-Impact cylinder, 308-Lower buffer pad, 309-Lower disc, 401-Linear connecting plate, 402-L-shaped connecting plate, 403-Upper support foot, 40 4-Connecting plate, 405-Modible hinge support, 406-Lower support foot, 407-Long connecting plate, 408-Short connecting plate, 501-Second speed sensor, 502-Force sensor, 503-First speed sensor, 504-Distance sensor, 601-Guide rail slider, 602-Fixed guide rail, 603-Platform, 604-Ball screw, 605-Screw slider, 606-Screw nut, 701-Battery, 702-High-speed camera, 703-Frame, 801-Guide rail, 802-Cylinder frame, 803-Impact cylinder, 901-Traction slider, 902-Traction guide rail, 903-Traction cable, 904-Hooked cable. Detailed Implementation
[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0031] The purpose of this invention is to provide an impact testing device and method for a pure electric passenger vehicle's skateboard chassis, in order to solve the problems existing in the prior art, simulate the actual situation of a pure electric passenger vehicle's skateboard chassis in a collision, and improve the accuracy of pure electric passenger vehicle chassis testing.
[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0033] Example 1
[0034] like Figures 1-5As shown, this embodiment provides an impact testing device for a pure electric passenger vehicle's skateboard chassis, including a moving main module, an impact module, a support module, a monitoring module, a control module, and a power module. The moving main module is movable, facilitating reset after testing. The support module is movably mounted on the moving main module and can reciprocate on it. By adjusting the position of the support module, the position of the impact module is changed, ensuring that the impact module is aligned with the impact position during movement, thus completing the impact test and improving testing accuracy and efficiency. The impact module is installed within the support module, and its impact direction is vertical. The upper part acts on the lower part of the impact-slide chassis to simulate vertical impact. The monitoring module monitors the impact velocity and acceleration of the impact module, the horizontal velocity of the moving main module, and the distance between the moving main module and the impact point on the skateboard chassis, in order to acquire various data in real time during the impact test. The monitoring module is electrically connected to the control module, and the control module is used to calculate the trigger point of the impact test based on the data monitored by the monitoring module, thereby improving the test accuracy. The power module is connected to the moving main module and is used to drive the moving main module to simulate horizontal impact. By combining horizontal and vertical impacts, the impact test can be made closer to pure impact simulation. During the operation of an electric passenger vehicle, the skateboard chassis may be subjected to impacts, and the damage is analyzed in situ. A position adjustment module is installed on the upper part of the moving main module, and a support module is installed on the position adjustment module. The impact module includes a driving impact unit and a driven impact unit. The lower end of the driving impact unit is installed on the lower end of the support module, and the driving and driven impact units are coaxially arranged. Initially, the upper end of the driving impact unit and the lower end of the driven impact unit are not in contact. When the driving impact unit impacts, it first impacts a certain distance before acting on the driven impact unit. The upper end of the driven impact unit is connected to the upper end of the support module. Since the driving impact unit mainly... The impact cylinder 803 impacts the vehicle vertically, but there is also a horizontal velocity during the test. Therefore, the cylinder rod 201 of the impact cylinder 803 may bend during the impact. Based on this, the impact cylinder 803 is not allowed to directly impact the skateboard chassis of the pure electric passenger vehicle. Instead, it is transitioned through a driven impact unit. The impact head of the driven impact unit is also more in line with the usage requirements and easier to replace. At the same time, the force sensor 502 and various speed sensors in the monitoring module also require space to be installed. The action time of the impact module is determined by the program control. To achieve the final impact point as the predetermined impact point, the data provided by the distance, speed and other sensors needs to be calculated by the program.The action is that the impact cylinder 803 of the prime mover impact unit impacts the impact head in the driven impact unit. After the impact head gains energy (speed), it impacts the skateboard chassis of the pure electric passenger vehicle, thus achieving the impact. Therefore, the final impact power comes from the impact cylinder 803. The prime mover impact unit includes a cylinder rod 201 and a cylinder barrel 204. One end of the cylinder rod 201 extends into the cylinder barrel 204 and connects to it. The end of the cylinder rod 201 away from the cylinder barrel 204 does not contact the driven impact unit. The driven impact unit includes an impact cylinder 307, a front impact head 303, and a rear impact head 305. The impact cylinder 307 is located on the outer periphery of the front impact head 303 and the rear impact head 305. The upper end of the rear impact head 305 is connected to the lower end of the front impact head 303.
[0035] Specifically, the moving main module includes a power element, a braking element 103, and a mounting frame. The power element includes a motor, a pneumatic tire 102, etc. An electrical box 101 is provided to provide power for the movement of the equipment. The pneumatic tire 102 is the main part of the movement. The power element is located at the lower end of the mounting frame and is used to provide movement power to the mounting frame. After the impact test is completed and the moving main module is braked, the power element moves and resets the moving main module and the components above it. The braking element 103 is connected to the power element and is used to provide braking force to the mounting frame to implement braking after the collision. The support module can move back and forth in the horizontal direction under the drive of the position adjustment module, and the movement direction of the support module is perpendicular to the movement direction of the moving main module. Thus, the coordinate position of the support module and the impact module can be adjusted by the support module so that the impact module can act on the required impact position when it travels and reaches the underside of the pure electric passenger vehicle's skateboard chassis.
[0036] like Figure 2As shown, the position adjustment module includes a ball screw 604, a screw slider 605, a platform 603, multiple guide rail sliders 601, and multiple fixed guide rails 602. The end of the ball screw 604 is mounted on the moving main body module via a support to improve stability. The outer periphery of the ball screw 604 is movably connected to the screw slider 605, so that when the ball screw 604 rotates, it can drive the screw slider 605 to reciprocate along the length of the ball screw 604. A screw nut 606 is provided at the screw slider 605, and each fixed guide rail 602... All components are parallel to the ball screw 604. Each fixed guide rail 602 has a sliding guide slider 601 connected to it, thus guiding the guide slider 601. Both the guide slider 601 and the ball screw slider 605 are connected to the upper end of the platform 603. When the ball screw 604 rotates, it drives the ball screw slider 605 to move, which in turn drives the platform 603 to move. With the auxiliary support of the guide slider 601 and the fixed guide rails 602, the platform 603 moves more stably. The platform 603 is connected to a support module, allowing for position adjustment of the support module. A slot is cut into the bottom of the platform 603 for positioning the ball screw slider 605 and the guide slider 601. As a preferred embodiment, the guide rail slider 601 is provided with a threaded hole. After moving into position, a bolt passes through the threaded hole and abuts against the fixed guide rail 602, thereby limiting the movement between the guide rail slider 601 and the fixed guide rail 602. As another preferred embodiment, the fixed guide rail 602 is provided with a limiting block. When the guide rail slider 601 moves to the limiting block, it cannot move further, thereby limiting the movement between the guide rail slider 601 and the fixed guide rail 602. Those skilled in the art can also select other limiting methods according to actual needs.
[0037] The support module includes a vertical support frame and diagonal braces. Upper support feet 403 are located at each corner of the upper end of the vertical support frame, and lower support feet 406 are located at each corner of the lower end. An L-shaped connecting plate 402 and a straight connecting plate 401 are located in the middle. The vertical support frame is vertically mounted on the upper end of the position adjustment module. The impact module is installed inside the vertical support frame, and the impact end of the impact module can extend through the upper end of the vertical support frame, thus ensuring the verticality of the impact module. The lower end of the diagonal brace is rotatably mounted on the position adjustment module via a movable hinge support 405, and the upper end of the diagonal brace... The movable hinge support 405 is installed on one side of the vertical support frame and positioned near its upper end. It supports the vertical support frame with diagonal bracing, improving stability. The upper end of the vertical support frame is connected to the upper end of the impact module via a connecting plate 404, thus reinforcing the portion of the upper part of the vertical support frame connected to the driven impact unit. This transforms the impact force from being borne solely by the profile to being shared by the connecting plate 404, the upper face plate 301, and the profile, improving safety. The lower end of the vertical support frame is connected to the position adjustment module via a long connecting plate 407 and a short connecting plate 408. The vertical support frame can also be configured as a telescopic type and can self-lock after reaching its extended or retracted position, thus adapting to different application scenarios.
[0038] like Figure 3 As shown, a flange 202 is installed at each of the upper and lower ends of the prime mover impact unit. An upper enclosure 208 is provided on the outer periphery of the upper end of the support module, and a lower enclosure 206 is provided on the outer periphery of the lower end of the support module. The flange 202 at the upper end of the prime mover impact unit is connected to the upper enclosure 208 through an upper large flange 209, and the flange 202 at the lower end of the prime mover impact unit is connected to the lower enclosure 206 through a lower large flange 207, so as to better connect to the support module and achieve a tight connection between the prime mover impact unit and the support module.
[0039] The cylinder 204 is supplied with air through an air tank 210. A quick-release valve 203 and an intake valve 205 are also installed on the cylinder 204. The quick-release valve 203 and the intake valve 205 are connected to the air tank 210 via air pipes 211. The cylinder 204 is wirelessly controlled and operated via a solenoid valve in conjunction with an electrical box 101. An upper buffer pad 302 is installed at the upper end of the support module, allowing the upper end of the front impact head 303 to extend. A lower buffer pad 308 is installed at the lower end of the impact cylinder 307 to prevent accidents that may occur during impact. A lower disc 309 is also connected to the lower end of the lower buffer pad 308. The upper buffer pad 302... The upper end is also connected to an upper flower plate 301. Both the upper flower plate 301 and the lower flower plate 309 are connected to the end of the impact cylinder 307. A linear bearing 306 is sleeved on the outer periphery of the rear impact head 305. The linear bearing 306 plays a guiding role, so that the two impact heads can move in a straight line and minimize friction. A sleeve 304 is provided at the upper end of the linear bearing 306. The lower end of the linear bearing 306 is limited to a shoulder on the inner wall of the impact cylinder 307. The sleeve 304 is sleeved on the outer periphery of the lower end of the front impact head 303, and the lower end of the sleeve 304 abuts against another shoulder on the inner wall of the impact cylinder 307. The sleeve 304 is fixed inside the impact cylinder 307 by a set screw.
[0040] The monitoring module includes a force sensor 502, a first velocity sensor 503, a second velocity sensor 501, and a distance sensor 504. The force sensor 502 is installed between the front impact head 303 and the rear impact head 305 using glue and bolts to monitor the impact force. The first velocity sensor 503 is installed on the front impact head 303 using glue and bolts to monitor the impact velocity. The second velocity sensor 501 and the distance sensor 504 are both installed on the moving main body module using glue and bolts. By monitoring the velocity and distance, the trigger point of the impact test is calculated in conjunction with the program of the control module.
[0041] The pure electric passenger vehicle's skateboard chassis is lifted and fixed by a test bench 703. The battery 701 is integrated with the pure electric passenger vehicle's skateboard chassis. The impact testing device for the pure electric passenger vehicle's skateboard chassis needs to be guided during its movement to ensure that the impact coordinates in the direction of travel are not deviated. The impact process is observed and recorded by a high-speed camera 702.
[0042] like Figure 4As shown, the power module is an impact power assembly, which includes an impact cylinder group 803, a cylinder frame 802, and a guide rail 801. Both the guide rail 801 and the cylinder frame 802 are mounted on the ground, and the guide rail 801 is used to provide guidance when the moving main module moves. The impact cylinder group 803 is mounted on the cylinder frame 802, and the impact direction of the impact cylinder group 803 is consistent with the moving direction of the moving main module. Thus, the impact cylinder group 803 provides an initial velocity to the impact testing device of the pure electric passenger vehicle skateboard chassis, and is guided by the guide rail 801.
[0043] like Figure 5 As shown, the power module is a traction power assembly, which includes a winch, a traction cable 903, a traction slider 901, a hooked cable 904, and a traction guide rail 902. The traction guide rail 902 is installed underground. The two ends of the traction cable 903 are connected to the winch and the traction slider 901, respectively. The traction slider 901 is installed on the traction guide rail 902. The two ends of the hooked cable 904 are connected to the traction slider 901 and the moving main module, respectively. The winch drives the traction cable 903 to stretch, thereby driving the traction slider 901 to move. At the same time, the traction guide rail 902 guides the traction slider 901. The traction slider 901 drives the pure electric passenger vehicle's skateboard chassis to move through the hooked cable 904.
[0044] Compared to existing chassis impact simulation technologies and testing methods, this embodiment adds a horizontal relative velocity to the moving main module, which can more realistically simulate the damage caused by scraping or hitting the bottom during actual driving. By adjusting the impact position, impact tests are carried out at different positions and with different impact loads. Furthermore, the correlation between the impact damage of the skateboard chassis of pure electric passenger vehicles and the thermal runaway accident of the 701 pack of batteries in pure electric passenger vehicles is analyzed, providing a scientific and effective method and technology for further safety analysis of pure electric passenger vehicles.
[0045] Example 2
[0046] This embodiment provides an impact testing method for a pure electric passenger vehicle's skateboard chassis, using the impact testing device for a pure electric passenger vehicle's skateboard chassis from Embodiment 1, and includes the following steps:
[0047] S1. Move the pure electric passenger vehicle's skateboard chassis to the designated position, and use the 703 test bench or a lift to lift the pure electric passenger vehicle's skateboard chassis to the test height and fix it in place;
[0048] S2. Connect the impact testing device of the pure electric passenger vehicle skateboard chassis to the guide rail 801, or connect it to the hooked steel cable 904, and place the cylinder barrel 204 and cylinder rod 201 in the prime mover impact unit in the initial position.
[0049] S3. Determine the impact position on the skateboard chassis of the pure electric passenger vehicle under test, adjust the position adjustment module, and ensure that the impact testing device of the skateboard chassis of the pure electric passenger vehicle can reach the required impact position when moving. Adjust the parameters in the control module program to make the actual impact position coincide with the required impact position.
[0050] S4. Start the test. The impact test device of the pure electric passenger vehicle skateboard chassis is accelerated to the predetermined speed by the traction power component or the impact power component. The impact test device of the pure electric passenger vehicle skateboard chassis will autonomously complete the fixed-point impact action during the operation of the program. After the impact is completed, the impact test device of the pure electric passenger vehicle skateboard chassis is braked by the braking element 103 until it stops completely. Then, the power component is used to drive the impact test device of the pure electric passenger vehicle skateboard chassis back to the initial position of the test. During the impact, the high-speed camera 702 is used to capture and store the images.
[0051] S5. Repeat the test multiple times to obtain the results of different positions of the tested pure electric passenger vehicle's skateboard chassis after being impacted, and observe whether the battery 701 is deformed or damaged. Analyze the changes of different tested pure electric passenger vehicle skateboard chassis after being impacted, which will play an important role in improving the safety of pure electric passenger vehicles.
[0052] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.
Claims
1. An impact testing device for a pure electric passenger vehicle's skateboard-type chassis, characterized in that: The device includes a mobile main body module, an impact module, a support module, a monitoring module, a control module, and a power module. The mobile main body module is movable. The support module is movably mounted on the mobile main body module and can reciprocate on it. The impact module is installed inside the support module, and its impact direction is vertical. The upper end of the impact module acts on the lower end of the impact-slide chassis. The monitoring module monitors the impact velocity and acceleration of the impact module, the horizontal velocity of the mobile main body module, and the distance between the mobile main body module and the impact point on the skateboard chassis. The monitoring module is electrically connected to the control module, and the control module calculates the trigger point for the impact test based on the data monitored by the monitoring module. The power module is connected to the mobile main body module and drives it to move. The moving main module is equipped with a position adjustment module at its upper end, and the support module is mounted on the position adjustment module. The impact module includes a driving impact unit and a driven impact unit. The lower end of the driving impact unit is mounted on the lower end of the support module, and the driving impact unit and the driven impact unit are coaxially arranged. In the initial state, the upper end of the driving impact unit is not in contact with the lower end of the driven impact unit, and the upper end of the driven impact unit is connected to the upper end of the support module. The driving impact unit includes a cylinder rod and a cylinder barrel. One end of the cylinder rod extends into the cylinder barrel and is connected, and the end of the cylinder rod away from the cylinder barrel does not contact the driven impact unit. The driven impact unit includes an impact cylinder, a front impact head, and a rear impact head. The impact cylinder is located on the outer periphery of the front impact head and the rear impact head, and the upper end of the rear impact head is connected to the lower end of the front impact head.
2. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 1, characterized in that: The moving main body module includes a power element, a braking element, and a mounting frame. The power element is located at the lower end of the mounting frame and is used to provide moving power to the mounting frame. The braking element is connected to the power element and is used to provide braking force to the mounting frame. The support module can reciprocate in the horizontal direction under the drive of the position adjustment module, and the moving direction of the support module is perpendicular to the moving direction of the moving main body module.
3. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 2, characterized in that: The position adjustment module includes a ball screw, a screw slider, a platform, multiple guide rail sliders, and multiple fixed guide rails. The end of the ball screw is mounted on the moving main body module via a support base, and the outer periphery of the ball screw is movably connected to the screw slider. Each of the fixed guide rails is parallel to the ball screw, and each of the fixed guide rails has a guide rail slider slidably connected to it. Both the guide rail slider and the screw slider are connected to the upper end of the platform, and the platform is connected to the support module.
4. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 2, characterized in that: The support module includes a vertical support frame and diagonal braces. The vertical support frame is vertically mounted on the upper end of the position adjustment module. The impact module is installed inside the vertical support frame, and the impact end of the impact module can extend through the upper end of the vertical support frame. The lower end of the diagonal brace is rotatably mounted on the position adjustment module via a movable hinge support, and the upper end of the diagonal brace is mounted on one side of the vertical support frame via the movable hinge support, and is positioned close to the upper end of the movable hinge support. The upper end of the vertical support frame is connected to the upper end of the impact module via a connecting plate, and the lower end of the vertical support frame is connected to the position adjustment module via a long connecting plate and a short connecting plate.
5. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 1, characterized in that: The prime mover impact unit has a flange installed at both its upper and lower ends. The upper outer periphery of the support module is provided with an upper enclosure, and the lower outer periphery of the support module is provided with a lower enclosure. The flange at the upper end of the prime mover impact unit is connected to the upper enclosure through an upper large flange, and the flange at the lower end of the prime mover impact unit is connected to the lower enclosure through a lower large flange.
6. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 5, characterized in that: The cylinder is supplied with air through an air tank. A quick-release valve and an intake valve are also installed on the cylinder. The quick-release valve and the intake valve are connected to the air tank via air pipes. The cylinder is wirelessly controlled and controlled by a solenoid valve in conjunction with an electrical control box. An upper buffer pad is installed at the upper end of the support module, allowing the upper end of the front impact head to extend. A lower buffer pad is installed at the lower end of the impact cylinder. A lower patterned disc is connected to the lower end of the lower buffer pad, and an upper patterned disc is connected to the upper end of the upper buffer pad. Both the upper and lower patterned discs are connected to the ends of the impact cylinder. A linear bearing is fitted around the outer periphery of the rear impact head. A sleeve is provided at the upper end of the linear bearing, and the lower end of the linear bearing is limited to a shoulder on the inner wall of the impact cylinder. The sleeve is fitted around the outer periphery of the lower end of the front impact head, and the lower end of the sleeve abuts against another shoulder on the inner wall of the impact cylinder. The sleeve is fixed inside the impact cylinder by a set screw.
7. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 6, characterized in that: The monitoring module includes a force sensor, a first speed sensor, a second speed sensor, and a distance sensor. The force sensor is installed between the front impact head and the rear impact head, the first speed sensor is installed on the front impact head, and the second speed sensor and the distance sensor are both installed on the moving main body module.
8. The impact testing device for a pure electric passenger vehicle skateboard chassis according to claim 1, characterized in that: The power module is an impact power assembly, which includes an impact cylinder assembly, a cylinder frame, and a guide rail. The guide rail and the cylinder frame are both mounted on the ground, and the guide rail is used to provide guidance when the mobile main module moves. The impact cylinder assembly is mounted on the cylinder frame, and the impact direction of the impact cylinder assembly is consistent with the moving direction of the mobile main module.
9. The impact testing device for a pure electric passenger vehicle's skateboard chassis according to claim 1, characterized in that: The power module is a traction power assembly, which includes a winch, a traction cable, a traction slider, a hooked cable, and a traction guide rail. The traction guide rail is installed underground. The two ends of the traction cable are respectively connected to the winch and the traction slider. The traction slider is installed on the traction guide rail. The two ends of the hooked cable are respectively connected to the traction slider and the moving main module.
10. An impact testing method for a skateboard-type chassis of a pure electric passenger vehicle, characterized in that: The impact testing apparatus for a pure electric passenger vehicle with a skateboard chassis according to any one of claims 1-9 includes the following steps: S1. Move the test pure electric passenger vehicle's skateboard chassis to the designated position, and use a test bench or lift to lift the test pure electric passenger vehicle's skateboard chassis to the test height and fix it. S2. Connect the impact testing device of the pure electric passenger vehicle skateboard chassis to the guide rail or to the hooked steel cable, and place the cylinder barrel and cylinder rod in the prime mover impact unit in the initial position; S3. Determine the impact position on the skateboard chassis of the pure electric passenger vehicle under test, adjust the position adjustment module, and ensure that the impact testing device of the skateboard chassis of the pure electric passenger vehicle can reach the required impact position when moving. Adjust the parameters in the control module program to make the actual impact position coincide with the required impact position. S4. Start the test. The impact test device of the pure electric passenger vehicle skateboard chassis is accelerated to the predetermined speed by the traction power component or the impact power component. The impact test device of the pure electric passenger vehicle skateboard chassis will autonomously complete the fixed-point impact action during the operation of the program. After the impact is completed, the impact test device of the pure electric passenger vehicle skateboard chassis is braked by the braking element until it comes to a complete stop. Then, the power component is used to drive the impact test device of the pure electric passenger vehicle skateboard chassis back to the initial position of the test. During the impact, the high-speed camera is used to capture and store the images. S5. Repeat the test multiple times to obtain the results of different positions of the tested pure electric passenger vehicle's skateboard chassis after being subjected to impact, and observe whether the battery is deformed or damaged, and analyze the changes of different tested pure electric passenger vehicle skateboard chassis after being subjected to impact.