A new energy vehicle bottom battery pack oblique impact test system

Abstract

The utility model discloses a new energy vehicle bottom battery pack oblique hit test system, including new energy vehicle and track, and new energy vehicle bottom is loaded with battery pack, and new energy vehicle is installed on the track, and new energy vehicle is configured as can along the laying direction of track removal, hit simulation spare and ejector assembly, hit simulation spare is installed on the ejector assembly, and the ejector assembly is installed on the track, and the ejector assembly is configured as can release hit simulation spare, to make hit simulation spare hit the battery pack of moving, adjustment assembly, adjustment assembly is installed on the track, and the ejector assembly is installed on the adjustment assembly, and the adjustment assembly is configured as can adjust the angle of ejector assembly release hit simulation spare, new energy vehicle, ejector assembly and adjustment assembly can simulate the actual working condition of high -speed running of vehicle, provide real comprehensive impact test object for hit simulation spare, guarantee the real, effective of test result, can accurately reaction battery pack actual anti -impact performance.

Description

Technical Field

[0001] This utility model relates to the field of automobile crash testing, and in particular to a test system for oblique impact testing of the bottom battery pack of a new energy vehicle. Background Technology

[0002] With continuous technological advancements and increased consumer awareness of environmental protection, the market share of new energy vehicles continues to climb, becoming the mainstream trend in the future development of the automotive industry. New energy vehicles, with their numerous advantages such as zero or low emissions, low noise, and high efficiency, not only provide an effective way to alleviate the energy crisis and environmental pollution, but also bring consumers a brand-new travel experience. As the core component of new energy vehicles, the battery pack not only provides the electrical energy needed for vehicle propulsion, but its performance directly affects the vehicle's power performance, driving range, and overall safety. In the actual use of new energy vehicles, battery packs face complex, varied, and severe external environmental challenges. For example, when a vehicle is in motion, there may be foreign objects of various sizes, shapes, and materials on the road, such as stones, metal fragments, and branches. These foreign objects, under the influence of the strong airflow generated by the vehicle's high-speed movement and their own inertia, will be splashed at high speeds and specific angles, directly impacting the battery pack at the bottom of the vehicle. This can cause the battery pack casing to rupture, damage to the internal battery cells, and even lead to serious safety accidents such as battery short circuits, fires, or explosions. These safety accidents not only pose a direct threat to the lives and property of users but may also raise public concerns about the safety of new energy vehicles, hindering the further promotion and development of the new energy vehicle industry. Therefore, battery safety performance testing technology is becoming a focus of industry attention.

[0003] However, most existing battery safety performance tests are based on standardized simulated operating conditions, which have the following shortcomings: they only involve impacts in a single direction, ignoring the situation where foreign objects impact the battery pack at different angles; the set impact speed and foreign object type deviate significantly from actual road conditions, resulting in test results that cannot accurately reflect the impact resistance performance of the battery pack in actual use; and the test object used is a stationary battery pack, which cannot be used to conduct impact tests on battery packs that are traveling at high speeds, making it difficult to realistically and comprehensively reproduce the complex and variable actual operating conditions of a vehicle encountering a flying foreign object on the road while traveling at high speeds. Utility Model Content

[0004] The purpose of this invention is to provide a bottom battery pack oblique impact test system for new energy vehicles, in order to solve the problems of existing battery safety performance testing technologies that are based on impact in only one direction, impact speed and foreign object type, which deviate greatly from actual road conditions, and the test object is a stationary battery pack that cannot be tested while the vehicle is in motion. This makes it difficult to truly and comprehensively reproduce the actual working conditions at high speed, resulting in test results that cannot accurately reflect the actual impact resistance performance of the battery pack.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A bottom battery pack oblique impact test system for new energy vehicles includes:

[0007] A new energy vehicle and a track, wherein the new energy vehicle is equipped with a battery pack at its bottom, the new energy vehicle is mounted on the track, and the new energy vehicle is configured to move along the track's laying direction;

[0008] Impact simulator and ejection assembly, the impact simulator being mounted on the ejection assembly being mounted on a track, the ejection assembly being configured to release the impact simulator to cause the impact simulator to impact a moving battery pack;

[0009] An adjustment assembly is mounted on a track, and the ejection assembly is mounted on the adjustment assembly. The adjustment assembly is configured to adjust the angle at which the ejection assembly releases the impact simulator.

[0010] Based on the aforementioned technical means, new energy vehicles and tracks enable new energy vehicles with battery packs mounted on their bottoms to simulate the actual working conditions of high-speed vehicle operation. This provides a realistic and comprehensive impact test object for the impact simulation component, ensuring the authenticity and effectiveness of the test results and accurately reflecting the actual impact resistance performance of the battery pack. The ejection assembly releases the impact simulation component at a set speed to impact the moving battery pack, thus simulating a dynamic impact scenario more closely resembling the flying debris encountered by a vehicle at high speed. Simultaneously, the adjustable component flexibly adjusts the angle at which the impact simulation component is released, overcoming the limitation of existing technologies that can only impact in a single direction. This high flexibility allows for a more realistic and comprehensive reproduction of the complex and variable actual working conditions of a vehicle encountering flying debris at high speed. Consequently, the test results more accurately reflect the impact resistance performance of the battery pack in actual use, providing strong support for new energy companies to accurately test battery pack strength and scientifically assess vehicle safety risk levels, and powerfully promoting the development of new energy vehicle safety performance testing technology.

[0011] Furthermore, the ejection assembly includes a spring and a mounting post. One end of the spring is connected to an adjustment assembly, and the other end is connected to one end of the mounting post. The other end of the mounting post forms a mounting groove, and the impact simulation element can be placed in the mounting groove. The mounting post is configured to be movable along a first direction and a second direction.

[0012] When the mounting post moves along the first direction, the spring is compressed or stretched, and the impact simulation element is located in the mounting groove; when the mounting post moves along the second direction, the spring returns to its original position, and the impact simulation element is disengaged from the mounting groove and released.

[0013] Based on the aforementioned technical means, the spring and mounting post work together to provide the ejection power source for the impact simulator. The ejection force can be adjusted by controlling the compression or extension of the spring, allowing the impact simulator to be released at a set speed. Specifically, when the mounting post moves along the first direction under external force, the spring compresses or stretches to a preset degree to store energy for subsequent ejection, ensuring the impact simulator is stably placed in the mounting groove. This ensures reliable fixation of the impact simulator during the preparation stage, preventing premature detachment from affecting test results. When the impact test is performed, the external force driving the mounting post is removed, the spring resets, and the mounting post moves along the second direction, thus releasing the impact simulator due to inertia. Under its action, the impact simulator is precisely and quickly released and ejected to impact the moving battery pack, simulating the dynamic process of a high-speed flying foreign object impacting the battery pack. With its simple structure, flexible operation, and rapid response, it allows for better control of the timing and force of the impact simulator's launch. Combined with the adjustment component to control the ejection angle, it simulates various impact conditions with different angles and forces, comprehensively and realistically recreating the complex scenario of a vehicle encountering flying foreign objects on the road at high speed. This provides solid technical support for accurately evaluating the impact resistance performance of battery packs under complex real-world road conditions, and powerfully promotes the development and improvement of automotive battery pack safety performance testing technology.

[0014] Furthermore, the ejection assembly also includes a housing, a piston plate, and an air supply device. The housing is mounted on the adjustment assembly. The piston plate is movably connected within the cavity of the housing and divides the cavity into a sealed cavity and a mounting cavity. The spring is located within the mounting cavity, with its two ends connected to the inner walls of the piston plate and the mounting cavity, respectively. One end of the mounting post is connected to the piston plate, and the other end extends through the sealed cavity and the housing. The piston plate is configured to move between the sealed cavity and the mounting cavity to drive the mounting post to move along a first direction and a second direction.

[0015] The housing has an air inlet and an air outlet, which are configured to communicate with a sealed cavity. The air supply device is connected to the air inlet to provide an air source.

[0016] Based on the aforementioned technical means, a pneumatic-spring coordinated drive system is constructed by dividing the cavity of the housing into a sealed cavity and an installation cavity using a piston plate. Specifically, the air supply device supplies air to the sealed cavity through the air inlet, while the air outlet is closed. The gas pushes the piston plate to move, which in turn drives the installation column to move along the first direction to compress the spring, realizing the energy storage process of the impact simulation component. During this process, the compression degree of the spring can be flexibly adjusted by precisely controlling the air pressure, accurately controlling the ejection energy reserve. When the impact simulation component is released, the air supply device stops supplying air, opens the air outlet to discharge the gas in the sealed cavity, and the spring resets, driving the installation column to move along the first direction to compress the spring. The second direction of movement releases and ejects the impact simulator under the action of inertial force. The response speed is fast and the action is smooth, ensuring that the impact simulator can be ejected at a stable speed and angle, which greatly improves the repeatability and accuracy of the test. At the same time, the spring provides a certain buffer protection under its own elasticity to avoid damage to the system and enhance the reliability and stability of the entire ejection assembly. Those skilled in the art will understand that the spring can also be installed in the sealed cavity, with its two ends connected to the inner wall of the sealed cavity and the piston plate, respectively. When the gas pushes the piston plate to move, and then drives the mounting column to move in the first direction, the spring is stretched.

[0017] Furthermore, the ejection assembly also includes a sealing ring, which is mounted on the piston plate and fills the space between the inner wall of the housing and the piston plate.

[0018] Based on the above technical means, the sealing ring is tightly filled between the inner wall of the shell and the piston plate, which ensures the sealing of the sealed cavity and prevents gas leakage during the charging process. This improves the controllability and accuracy of the ejection process, allowing the impact simulation component to be ejected at a more stable speed and angle, and significantly improves the repeatability and accuracy of the test results.

[0019] Furthermore, the ejection assembly also includes a pressure sensor located within the mounting cavity and mounted on the piston plate. The pressure sensor is configured to abut against the inner wall of the mounting cavity to detect the pressure within the sealed cavity.

[0020] Based on the aforementioned technical means, the pressure inside the sealed cavity is accurately detected by the degree of contact between the air pressure sensor and the inner wall of the installation cavity. During the energy storage process, the pressure change during the inflation of the sealed cavity by the air supply device can be fed back in real time, allowing the operator to accurately control the air pressure value and thus precisely adjust the compression degree of the spring. This enables precise setting of the ejection energy of the impact simulation component, meeting the personalized needs of different battery pack specifications and diverse test scenarios for impact force, and greatly improving the flexibility and adaptability of the test.

[0021] Furthermore, the adjustment component includes:

[0022] A base and a mounting plate, wherein the base is mounted on a track, one end of the mounting plate is connected to the base via a hinge, and the other end of the mounting plate is configured to rotate about the pivot of the hinge to adjust the tilt angle of the mounting plate, and the housing is mounted on the mounting plate;

[0023] It also includes two connecting plates and two support rods. The two connecting plates are symmetrically installed on opposite sides of the mounting plate. Multiple adjustment holes are formed on the two connecting plates. The adjustment holes are evenly distributed along the inclined direction of the mounting plate. One end of each of the two support rods can be connected to any one of the adjustment holes on one of the connecting plates. The other end of each of the two support rods is hinged to the base.

[0024] Based on the aforementioned technical means, the mounting plate is connected to the base via a hinge, allowing the mounting plate to rotate around the hinge axis. This enables the mounting plate to adjust the housing at different tilt angles, thereby adjusting the ejection angle of the impact simulation component, offering high flexibility. Simultaneously, a connecting plate with evenly distributed adjustment holes along the tilt direction, and a support rod with one end detachably connected to any adjustment hole and the other end hinged to the base, achieve flexible and precise adjustment and support of the mounting plate's tilt angle. Specifically, in practical applications, according to actual testing needs, the mounting plate is flipped to a preset tilt angle, allowing the impact simulation component to eject at the preset ejection angle. At this point, rotating the two support rods connects them to the corresponding adjustment holes, providing support force to the mounting plate and ensuring the stability of the set angle. This avoids the impact of angle deviation on testing accuracy during the test, providing solid and reliable technical support for new energy companies to accurately test battery pack strength and scientifically assess vehicle safety risk levels, effectively promoting the advancement of new energy vehicle safety performance testing technology.

[0025] Furthermore, the mounting plate has a plurality of first mounting holes evenly distributed, and the housing has two or more second mounting holes, each of the second mounting holes being configured to be connected to the corresponding first mounting hole by bolts, so as to detachably mount the housing onto the mounting plate.

[0026] Based on the aforementioned technical means, the first mounting hole on the mounting plate is detachably connected to the second mounting hole on the housing via bolts. This allows for flexible adjustment of the housing's mounting position on the mounting plate according to different testing requirements. This not only enables adjustment of the housing's position on a plane to simulate diverse impact positions and angle combinations, but also accommodates battery packs of different sizes and specifications. This enhances the versatility and flexibility of the testing system, meeting diverse testing scenario needs. The system is simple in structure and convenient for maintenance, repair, and replacement.

[0027] Furthermore, it also includes:

[0028] The traction device, steel cable, and traction trolley are respectively installed on the track. One end of the steel cable is connected to the traction device, and the other end is connected to the traction trolley. The traction trolley is configured to connect with a new energy vehicle. The traction device is configured to drive the steel cable to move the traction trolley so that the new energy vehicle moves along the laying direction of the track.

[0029] A release device is installed on a track. The traction trolley, the release device, and the ejection assembly are distributed sequentially along the direction of movement of the new energy vehicle. The release device is configured to release the traction trolley and the new energy vehicle when the traction trolley moves the new energy vehicle to the release device, so as to separate the traction trolley and the new energy vehicle.

[0030] Based on the aforementioned technical means, a stable and precisely controllable mobile power source is provided for new energy vehicles through the combination of a traction device, steel cable, and traction trolley. The traction device drives the steel cable to move the traction trolley, thereby enabling the new energy vehicle carrying the battery pack to move smoothly along the track. When the traction trolley moves the new energy vehicle to the preset position, i.e., the release device, the release device can quickly and accurately release the traction trolley and the new energy vehicle, so that the traction trolley and the new energy vehicle are separated. This allows the new energy vehicle to maintain its speed under inertia and move freely along the track until it collides with the impact simulation piece. This improves the repeatability and accuracy of the test, avoids the errors and uncertainties that may be caused by manual operation, and provides a strong guarantee for comprehensively and accurately evaluating the impact resistance performance of the battery pack in complex driving environments. This also strongly promotes the further development of new energy vehicle safety performance testing technology.

[0031] Furthermore, it also includes a braking device, which is installed on the new energy vehicle and is connected to the control system of the new energy vehicle for braking the new energy vehicle.

[0032] Based on the aforementioned technical means, after the new energy vehicle has completed the impact test, the braking device can precisely control the new energy vehicle to decelerate and stop, improving testing efficiency and meeting the requirements of different testing scenarios. In addition, when the new energy vehicle moves along the track under the action of the traction device to simulate high-speed driving, if it is necessary to stop the new energy vehicle in an emergency due to a sudden situation, the braking device can quickly respond to the control command and apply braking force to the new energy vehicle in a timely manner, effectively avoiding potential safety accidents and ensuring the safety of test personnel and equipment.

[0033] Furthermore, it also includes a triggering device, which is mounted on the track and located on the support between the ejection assembly and the release device. The triggering device is controlled to be connected to the ejection assembly. The triggering device is configured to control the ejection assembly to release the impact simulation component when the new energy vehicle moves to the triggering device, so that the impact simulation component impacts the moving battery pack.

[0034] Based on the aforementioned technical means, when a new energy vehicle carrying a battery pack moves to the triggering device position along a preset trajectory, the triggering device can accurately sense and quickly control the ejection assembly to release the impact simulation component, ensuring that the impact simulation component accurately initiates an impact at a specific position of the new energy vehicle. This position-triggered mechanism greatly improves the accuracy of the impact time and impact position, ensures a high degree of consistency in test conditions, effectively improves the repeatability and reliability of test results, and avoids time errors and action deviations that may be caused by human operation. It not only simplifies the test operation process and reduces labor costs and operational difficulty, but also reduces the risk of test result distortion caused by human factors.

[0035] The beneficial effects of this utility model are:

[0036] 1. This utility model uses new energy vehicles and tracks to enable new energy vehicles with battery packs mounted at the bottom to simulate the actual working conditions of high-speed vehicle operation, thereby providing a real and comprehensive impact test object for the impact simulation component, ensuring the authenticity and effectiveness of the test results, and accurately reflecting the actual impact resistance performance of the battery pack.

[0037] 2. This utility model uses an ejector assembly to release an impact simulation component at a set speed to impact a moving battery pack, thereby simulating a dynamic impact scenario that more closely resembles the impact of foreign objects flying during high-speed vehicle operation. Simultaneously, by adjusting the component, the angle at which the impact simulation component is released from the ejector assembly can be flexibly adjusted, overcoming the limitation of existing technologies that can only impact in a single direction. This high flexibility allows for a more realistic and comprehensive reproduction of the complex and variable actual working condition of a vehicle encountering flying foreign objects at high speed. Consequently, the test results can more accurately reflect the impact resistance performance of the battery pack in actual use, providing strong support for new energy companies to accurately test battery pack strength and scientifically assess vehicle safety risk levels, and powerfully promoting the development of new energy vehicle safety performance testing technology. Attached Figure Description

[0038] Figure 1 This is an application diagram of the present utility model;

[0039] Figure 2 This is a cross-sectional view of the catapult assembly of this utility model;

[0040] Figure 3 This is a schematic diagram of the structure of the adjustment component of this utility model. Figure 1 ;

[0041] Figure 4 This is a schematic diagram of the structure of the adjustment component of this utility model. Figure 2 .

[0042] Among them, 1-New energy vehicle; 2-Railway; 3-Battery pack; 4-Impact simulation component; 5-Ejection assembly; 51-Spring; 52-Mounting column; 521-Mounting groove; 53-Housing; 531-Sealed cavity; 532-Mounting cavity; 533-Air inlet; 534-Air outlet; 535-Second mounting hole; 54-Piston plate; 55-Air supply device; 56-Sealing ring; 57-Air pressure sensor; 6-Adjustment assembly; 61-Base; 62-Mounting plate; 621-First mounting hole; 63-Hinge; 64-Connecting plate; 641-Adjustment hole; 65-Support rod; 71-Traction device; 72-Steel cable; 73-Traction trolley; 74-Release device; 8-Brake device; 9-Trigger device.

[0043] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0046] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0047] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0048] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0049] The technical solution of this embodiment will be described in detail below with reference to the accompanying drawings.

[0050] Example 1

[0051] like Figures 1-3 As shown, a new energy vehicle bottom battery pack oblique impact test system includes: a new energy vehicle 1 and a track 2, the new energy vehicle 1 has a battery pack 3 mounted on its bottom, the new energy vehicle 1 is mounted on the track 2 and is configured to move along the laying direction of the track 2; an impact simulator 4 and an ejection assembly 5, the impact simulator 4 is mounted on the ejection assembly 5, the ejection assembly 5 is mounted on the track 2 and is configured to release the impact simulator 4 so that the impact simulator 4 impacts the moving battery pack 3; and an adjustment assembly 6, the adjustment assembly 6 is mounted on the track 2 and the ejection assembly 5 is mounted on the adjustment assembly 6, the adjustment assembly 6 is configured to adjust the angle at which the ejection assembly 5 releases the impact simulator 4.

[0052] This embodiment uses a new energy vehicle 1 and a track 2 to simulate the actual working conditions of a vehicle traveling at high speed, thus providing a realistic and comprehensive impact test object for the impact simulator 4. This ensures the authenticity and effectiveness of the test results and accurately reflects the actual impact resistance performance of the battery pack. The ejection assembly 5 releases the impact simulator 4 at a set speed to impact the moving battery pack 3, thereby simulating a dynamic impact scenario that more closely resembles the impact of foreign objects flying when a vehicle is traveling at high speed. At the same time, the adjustment assembly 6 flexibly adjusts the angle at which the impact simulator 4 is released by the ejection assembly 5, overcoming the deficiency of existing technologies that can only impact in one direction. This provides high flexibility and can more realistically and comprehensively reproduce the complex and variable actual working conditions of a vehicle encountering foreign objects flying from the road surface at high speed. Specifically, in practical applications, the ejection assembly 5 is located on the moving path of the new energy vehicle 1. The impact simulation component 4 is placed on the ejection assembly 5. According to the actual test requirements, the adjustment assembly 6 adjusts the ejection assembly 5 to a preset release angle. The new energy vehicle 1, loaded with the battery pack 3, moves along the track 2 at a preset speed to simulate a moving vehicle. When the new energy vehicle 1 moves to the designated position, the ejection assembly 5 can release the impact simulation component 4 at a preset ejection speed, so that the impact simulation component 4 can impact the moving battery pack 3 at a preset speed and angle. This simulates the actual working conditions of the vehicle in a realistic, comprehensive, and effective manner, and the test results can more accurately reflect the impact resistance performance of the battery pack in actual use. This provides strong support for new energy companies to accurately test the strength of the battery pack and scientifically assess the safety risk level of the vehicle, and strongly promotes the development of new energy vehicle safety performance testing technology. The impact simulation component 4 can be a stone, metal fragment, branch, or other simulated foreign object.

[0053] like Figure 1 As shown, this embodiment also includes: a traction device 71, a steel cable 72, and a traction trolley 73. The traction device 71, steel cable 72, and traction trolley 73 are respectively installed on the track 2. One end of the steel cable 72 is connected to the traction device 71, and the other end is connected to the traction trolley 73. The traction trolley 73 is configured to be able to connect with the new energy vehicle 1. The traction device 71 is configured to drive the steel cable 72 to move the traction trolley 73, so that the new energy vehicle 1 moves along the laying direction of the track 2. A release device 74 is installed on the track 2. The traction trolley 73, the release device 74, and the ejection assembly 5 are distributed sequentially along the moving direction of the new energy vehicle 1. The release device 74 is configured to release the traction trolley 73 from the new energy vehicle 1 when the traction trolley 73 moves the new energy vehicle 1 to the release device 74, so that the traction trolley 73 separates from the new energy vehicle 1.

[0054] Specifically, in practical applications, the combination of the traction device 71, steel cable 72, and traction trolley 73 provides a stable and precisely controllable power source for the new energy vehicle 1. The traction device 71 drives the steel cable 72 to move the traction trolley 73, thereby enabling the new energy vehicle 1, carrying the battery pack 3, to move smoothly along the track 2. When the traction trolley 73 moves the new energy vehicle 1 to the preset position, i.e., the release device 74, the release device 74 can quickly and accurately release the traction trolley 73 from the new energy vehicle 1, so that the traction trolley 73 and the new energy vehicle 1 are separated. This allows the new energy vehicle 1 to maintain its speed under inertia and move freely along the track 2 until it collides with the impact simulation piece 4. This improves the repeatability and accuracy of the test, avoids the errors and uncertainties that may be caused by manual operation, and provides a strong guarantee for comprehensively and accurately evaluating the impact resistance performance of the battery pack in complex driving environments. This also strongly promotes the further development of new energy vehicle safety performance testing technology. Among them, the release device 74 adopts a release structure known to those skilled in the art, such as a release plate.

[0055] like Figure 1 As shown, this embodiment also includes a braking device 8, which is installed on the new energy vehicle 1 and is controlled and connected to the new energy vehicle 1 for braking the new energy vehicle 1. Specifically, in practical applications, after the new energy vehicle 1 has completed the impact test, the braking device 8 can precisely control the new energy vehicle 1 to decelerate and stop, improving test efficiency and meeting the requirements of different test scenarios. In addition, when the new energy vehicle 1 moves along the track 2 under the action of the traction device 71 to simulate high-speed vehicle travel, if it is necessary to stop the new energy vehicle urgently due to sudden situations such as equipment failure or abnormal test parameters, the braking device 8 can quickly respond to the control command and apply braking force to the new energy vehicle 1 in a timely manner, effectively avoiding potential safety accidents and ensuring the safety of test personnel and equipment. The braking device 8 adopts a braking structure known to those skilled in the art, such as a brake.

[0056] like Figure 1As shown, this embodiment also includes a triggering device 9, which is mounted on the track 2 and located on the bracket between the ejection assembly 5 and the release device 74. The triggering device 9 is controlled to connect with the ejection assembly 5. The triggering device 9 is configured to control the ejection assembly 5 to release the impact simulation component 4 when the new energy vehicle 1 moves to the triggering device 9, so that the impact simulation component 4 impacts the moving battery pack 3. Specifically, in practical applications, when the new energy vehicle 1 carrying the battery pack 3 moves to the position of the triggering device 9 along a preset trajectory, the triggering device 9 can accurately sense and quickly control the ejection assembly 5 to release the impact simulation component 4, ensuring that the impact simulation component 4 accurately initiates an impact at a specific position of the new energy vehicle 1. This position-triggered mechanism greatly improves the accuracy of the impact time and impact position, ensures a high degree of consistency of test conditions, effectively improves the repeatability and reliability of test results, and avoids time errors and action deviations that may be caused by human operation. It not only simplifies the test operation process and reduces labor costs and operational difficulty, but also reduces the risk of test result distortion caused by human factors. The triggering device 9 uses a trigger switch known to those skilled in the art.

[0057] Example 2

[0058] like Figures 1-4 As shown, the difference between Example 1 and Example 2 is that:

[0059] like Figure 2 As shown, the ejection assembly 5 includes a spring 51 and a mounting post 52. One end of the spring 51 is connected to the adjustment assembly 6, and the other end is connected to one end of the mounting post 52. The other end of the mounting post 52 forms a mounting groove 521, in which the impact simulation element 4 can be placed. The mounting post 52 is configured to move along a first direction and a second direction. When the mounting post 52 moves along the first direction, the spring 51 is compressed or stretched, and the impact simulation element 4 is located in the mounting groove 521. When the mounting post 52 moves along the second direction, the spring 51 is reset, and the impact simulation element 4 is disengaged from the mounting groove 521 and released.

[0060] In this embodiment, the spring 51 and the mounting post 52 work together to provide the power source for the ejection of the impact simulation component 4. The ejection force can be adjusted by controlling the compression or extension of the spring 51, so as to release the impact simulation component 4 at a set speed. Specifically, when the mounting post 52 moves along the first direction under external force, the spring 51 is compressed or stretched to a preset degree to store energy for subsequent ejection. The impact simulation component 4 can be stably placed in the mounting groove 521, ensuring reliable fixation of the impact simulation component 4 during the preparation stage and avoiding premature detachment that would affect the test results. When the impact test is performed, the external force driving the mounting post 52 is removed, the spring 51 returns to its original position, and the mounting post 52 moves along the second direction. Under the influence of inertia, the impact simulator 4 is released and ejected precisely and quickly to impact the moving battery pack 3, simulating the dynamic process of a high-speed flying foreign object impacting the battery pack 3. The structure is simple, the operation is flexible, and the response is rapid. It can better control the timing and force of the launch of the impact simulator 4. Combined with the adjustment component 6 to adjust the ejection angle, it can simulate various impact conditions with different angles and forces, comprehensively and realistically recreating the complex scenario of a vehicle encountering flying foreign objects on the road at high speed. This provides solid technical support for accurately evaluating the impact resistance performance of the battery pack under complex actual road conditions and powerfully promotes the development and improvement of vehicle battery pack safety performance testing technology.

[0061] like Figure 2 As shown, in this embodiment, the ejection assembly 5 further includes a housing 53, a piston plate 54, and an air supply device 55. The housing 53 is mounted on the adjustment assembly 6. The piston plate 54 is movably connected within the cavity of the housing 53, dividing the cavity of the housing 53 into a sealed cavity 531 and a mounting cavity 532. The spring 51 is located within the mounting cavity 532, with its two ends connected to the inner walls of the piston plate 54 and the mounting cavity 532, respectively. One end of the mounting post 52 is connected to the piston plate 54, and the other end extends through the sealed cavity 531 and the housing 53. The piston plate 54 is configured to move between the sealed cavity 531 and the mounting cavity 532 to drive the mounting post 52 to move along a first direction and a second direction. An air inlet 533 and an air outlet 534 are formed on the housing 53. The air inlet 533 and the air outlet 534 are configured to communicate with the sealed cavity 531, respectively. The air supply device 55 is connected to the air inlet 533 to provide an air source.

[0062] In this embodiment, the cavity of the housing 53 is divided into a sealed cavity 531 and an installation cavity 532 by a piston plate 54, thus constructing a pneumatic-spring coordinated drive system. Specifically, in practical applications, the air supply device 55 supplies air to the sealed cavity 531 through the air inlet 533. At this time, the air outlet 534 is closed, and the gas pushes the piston plate 54 to move, thereby driving the installation column 52 to move along the first direction to compress the spring 51, realizing the energy storage process of the impact simulation element 4. During this process, the compression degree of the spring 51 can be flexibly adjusted by precise control of the air pressure, accurately controlling the ejection energy reserve. When the impact simulation element 4 is released, the air supply device 55 stops supplying air, opens the air outlet 534 to discharge the gas in the sealed cavity 531, and the spring 51 resets, driving the installation column 52 to move along the second direction, so as to achieve the energy storage process of the impact simulation element 4. The impact simulation component 4 is released and ejected quickly and smoothly, ensuring that the impact simulation component 4 can be ejected at a stable speed and angle, which greatly improves the repeatability and accuracy of the test. At the same time, the spring 51 provides a certain buffer protection under its own elasticity to avoid damage to the system and enhance the reliability and stability of the entire ejection assembly 5. Those skilled in the art will understand that the spring 51 can also be installed in the sealed cavity 531, with its two ends connected to the inner wall of the sealed cavity 531 and the piston plate 54, respectively. When the gas pushes the piston plate 54 to move, and then drives the mounting column 52 to move in the first direction, the spring 51 is stretched. The gas supply device 55 can be an air compressor. As a preferred embodiment of this embodiment, the mounting column 52 and the piston plate 54 are integrally formed.

[0063] like Figure 2 As shown, in this embodiment, the ejection assembly 5 also includes a sealing ring 56. The sealing ring 56 is installed on the piston plate 54 and fills the space between the inner wall of the housing 53 and the piston plate 54. By tightly filling the space between the inner wall of the housing 53 and the piston plate 54 with the sealing ring 56, the sealing performance of the sealed cavity 531 is ensured, preventing gas leakage during the charging process. This improves the controllability and accuracy of the ejection process, allowing the impact simulation component to be ejected at a more stable speed and angle, and significantly improving the repeatability and accuracy of the test results.

[0064] like Figure 2As shown, in this embodiment, the ejection assembly 5 also includes a pressure sensing device 57. The pressure sensing device 57 is located inside the mounting cavity 532 and mounted on the piston plate 54. The pressure sensing device 57 is configured to abut against the inner wall of the mounting cavity 532 to detect the air pressure inside the sealed cavity 531. Specifically, in practical applications, the degree of contact between the pressure sensing device 57 and the inner wall of the mounting cavity 532 is used to accurately detect the air pressure inside the sealed cavity 531. During the charging process, the pressure change during the inflation of the sealed cavity 531 by the air supply device 55 can be fed back in real time, allowing the operator to accurately control the air pressure value and thus accurately adjust the compression degree of the spring 51. This enables precise setting of the ejection energy of the impact simulation component 4, meeting the personalized needs of different battery pack specifications and diverse test scenarios for impact force, and greatly improving the flexibility and adaptability of the test. The pressure sensing device 57 can be a pressure sensor.

[0065] like Figure 3 and Figure 4 As shown, in this embodiment, the adjustment component 6 includes: a base 61 and a mounting plate 62. The base 61 is mounted on the track 2. One end of the mounting plate 62 is connected to the base 61 via a hinge 63. The other end of the mounting plate 62 is configured to rotate around the pivot of the hinge 63 to adjust the tilt angle of the mounting plate 62. The housing 53 is mounted on the mounting plate 62. It also includes two connecting plates 64 and two support rods 65. The two connecting plates 64 are symmetrically mounted on opposite sides of the mounting plate 62. Multiple adjustment holes 641 are formed on the two connecting plates 64. The adjustment holes 641 are evenly distributed along the tilt direction of the mounting plate 62. One end of each of the two support rods 65 can be connected to any one of the adjustment holes 641 on one of the connecting plates 64. The other ends of the two support rods 65 are respectively hinged to the base 61.

[0066] In this embodiment, the mounting plate 62 is connected to the base 61 via a hinge 63, allowing the mounting plate 62 to rotate around the hinge 3 axis. This enables the mounting plate 62 to drive the housing 53 to adjust different tilt angles, thereby adjusting the ejection angle of the impact simulation component 4, providing high flexibility. Simultaneously, a connecting plate 64 with evenly distributed adjustment holes 641 along the tilt direction, and a support rod 65 with one end detachably connected to any adjustment hole 641 and the other end hinged to the base 61, achieve flexible and precise adjustment and support of the tilt angle of the mounting plate 62. Specifically, in practical applications, according to actual testing requirements, the mounting plate 62 is flipped to a preset tilt angle, allowing the impact simulation component 4 to eject at a preset ejection angle. At this time, the two support rods 65 are rotated to connect to the corresponding adjustment holes 641, providing support force to the mounting plate 62 and ensuring the stability of the set angle. This avoids the impact of angle deviation on testing accuracy during the test, providing solid and reliable technical support for new energy companies to accurately test battery pack strength and scientifically assess vehicle safety risk levels, and powerfully promoting the advancement of new energy vehicle safety performance testing technology.

[0067] In a preferred embodiment of this invention, the mounting plate 62 has a plurality of first mounting holes 621 evenly distributed, and the housing 53 has two or more second mounting holes 535 configured to be connected to the corresponding first mounting hole 621 by bolts, so that the housing 53 can be detachably mounted on the mounting plate 62. Specifically, the first mounting holes 621 on the mounting plate 62 are detachably connected to the second mounting holes 535 on the housing 53 by bolts, which allows for flexible adjustment of the installation position of the housing 53 on the mounting plate 62 according to different testing requirements. This not only enables the adjustment of the position of the housing 53 on the plane to simulate diverse impact positions and angle combinations, but also adapts to battery packs 3 of different sizes and specifications, improving the versatility and flexibility of the testing system, meeting diverse testing scenario requirements, and featuring a simple structure and convenient maintenance, repair, and replacement.

[0068] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.

[0069] Example 3

[0070] This embodiment provides a method for simulating impact testing of a vehicle battery pack, using the oblique impact testing system for the bottom battery pack of a new energy vehicle as described in Embodiment 1 or Embodiment 2, including the following steps:

[0071] S1. The traction device 71, the ejection assembly 5, the triggering device 9, the release device 74, the traction trolley 73 and the new energy vehicle 1 are installed in sequence at the set positions on the track 2. The traction device 71 and the steel cable 72 are connected to the traction trolley 73, the traction trolley 73 is connected to the new energy vehicle 1, the battery pack 3 is installed at the bottom of the new energy vehicle 1, the braking device 8 is installed on the new energy vehicle 1, and the battery pack 3 is charged to the preset power level.

[0072] S2. Place the impact simulation component 4 on the ejection assembly 5, and adjust the preset ejection angle of the ejection assembly 5 by adjusting the component 6. The ejection assembly 5 is charged to the preset release speed.

[0073] S3. Start the traction device 71 to drive the steel cable 72 to move the traction trolley 73 and the new energy vehicle 1 along the track 2 at a preset speed;

[0074] S4. When the traction trolley 73 moves the new energy vehicle 1 to the position of the release device 74, the traction trolley 73 separates from the new energy vehicle 1, and the new energy vehicle 1 continues to move along the track 2 while maintaining its speed.

[0075] S5. When the new energy vehicle 1 moves the battery pack 3 to the position of the triggering device 9, the ejection assembly 5 releases the impact simulation component 4 at a set speed and angle to impact the moving battery pack 3.

[0076] S6. After the impact simulation component 4 impacts the battery pack 3, the braking device 8 brakes the new energy vehicle 1.

[0077] S7. Observe whether the battery pack 3 experiences thermal runaway, fire, or explosion. Record the time interval between the impact and the fire / explosion of the battery pack 3 to complete the test.

[0078] Compared with traditional battery safety performance testing technologies, this application is more flexible and can more realistically and comprehensively reproduce the complex and ever-changing actual working conditions of vehicles encountering road debris splashing during high-speed driving. This allows the test results to more accurately reflect the impact resistance performance of the battery pack in actual use, providing strong support for new energy companies to accurately test battery pack strength and scientifically assess vehicle safety risk levels, and powerfully promoting the development of new energy vehicle safety performance testing technology.

[0079] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A test system for oblique impact testing of the bottom battery pack of a new energy vehicle, characterized in that, include: A new energy vehicle (1) and a track (2), wherein the new energy vehicle (1) is equipped with a battery pack (3) at its bottom, the new energy vehicle (1) is mounted on the track (2), and the new energy vehicle (1) is configured to move along the laying direction of the track (2); Impact simulator (4) and ejection assembly (5), the impact simulator (4) is mounted on the ejection assembly (5), the ejection assembly (5) is mounted on the track (2), and the ejection assembly (5) is configured to release the impact simulator (4) so ​​that the impact simulator (4) impacts the moving battery pack (3). Adjustment component (6), which is mounted on track (2), and ejection component (5), which is mounted on adjustment component (6), are configured to adjust the angle at which ejection component (5) releases impact simulator (4).

2. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 1, characterized in that, The ejection assembly (5) includes a spring (51) and a mounting post (52). One end of the spring (51) is connected to the adjustment assembly (6), and the other end is connected to one end of the mounting post (52). The other end of the mounting post (52) forms a mounting groove (521). The impact simulation element (4) can be placed in the mounting groove (521). The mounting post (52) is configured to be movable along a first direction and a second direction. When the mounting post (52) moves in the first direction, the spring (51) is compressed or stretched, and the impact simulation element (4) is located in the mounting groove (521); when the mounting post (52) moves in the second direction, the spring (51) is reset, and the impact simulation element (4) is disengaged from the mounting groove (521) and released.

3. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 2, characterized in that, The ejection assembly (5) further includes a housing (53), a piston plate (54), and an air supply device (55). The housing (53) is mounted on the adjustment assembly (6). The piston plate (54) is movably connected in the cavity of the housing (53) and divides the cavity of the housing (53) into a sealed cavity (531) and a mounting cavity (532). The spring (51) is located in the mounting cavity (532) and its two ends are connected to the inner walls of the piston plate (54) and the mounting cavity (532) respectively. One end of the mounting post (52) is connected to the piston plate (54), and the other end extends out of the sealed cavity (531) and the housing (53). The piston plate (54) is configured to move between the sealed cavity (531) and the mounting cavity (532) to drive the mounting post (52) to move along a first direction and a second direction. The housing (53) has an air inlet (533) and an air outlet (534) formed thereon. The air inlet (533) and the air outlet (534) are configured to be connected to the sealed cavity (531) respectively. The air supply device (55) is connected to the air inlet (533) and is used to provide an air source.

4. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 3, characterized in that, The ejection assembly (5) also includes a sealing ring (56), which is mounted on the piston plate (54) and fills the space between the inner wall of the housing (53) and the piston plate (54).

5. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 3, characterized in that, The ejection assembly (5) also includes a pressure sensor (57) located in the mounting cavity (532) and mounted on the piston plate (54). The pressure sensor (57) is configured to abut against the inner wall of the mounting cavity (532) to detect the pressure in the sealed cavity (531).

6. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 3, characterized in that, The adjustment component (6) includes: A base (61) and a mounting plate (62) are provided. The base (61) is mounted on a track (2). One end of the mounting plate (62) is connected to the base (61) via a hinge (63). The other end of the mounting plate (62) is configured to be able to rotate about the pivot of the hinge (63) to adjust the tilt angle of the mounting plate (62). The housing (53) is mounted on the mounting plate (62). It also includes two connecting plates (64) and two support rods (65). The two connecting plates (64) are symmetrically installed on opposite sides of the mounting plate (62). Multiple adjustment holes (641) are formed on the two connecting plates (64). Each adjustment hole (641) is evenly distributed along the inclined direction of the mounting plate (62). One end of each of the two support rods (65) can be connected to any one of the adjustment holes (641) on one of the connecting plates (64). The other end of each of the two support rods (65) is hinged to the base (61).

7. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 6, characterized in that, The mounting plate (62) has a plurality of first mounting holes (621) evenly distributed. The housing (53) has two or more second mounting holes (535) configured to be connected to the corresponding first mounting hole (621) by bolts, so as to detachably mount the housing (53) onto the mounting plate (62).

8. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 1, characterized in that, Also includes: The traction device (71), steel cable (72) and traction trolley (73) are respectively installed on the track (2). One end of the steel cable (72) is connected to the traction device (71) and the other end is connected to the traction trolley (73). The traction trolley (73) is configured to be connected to the new energy vehicle (1). The traction device (71) is configured to drive the steel cable (72) to move the traction trolley (73) so that the new energy vehicle (1) moves along the laying direction of the track (2). Release device (74) is installed on track (2). The traction trolley (73), release device (74) and ejection assembly (5) are distributed in sequence along the moving direction of the new energy vehicle (1). The release device (74) is configured to release the traction trolley (73) and the new energy vehicle (1) when the traction trolley (73) moves the new energy vehicle (1) to the release device (74), so that the traction trolley (73) and the new energy vehicle (1) are separated.

9. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 1, characterized in that, It also includes a braking device (8), which is installed on the new energy vehicle (1) and is connected to the new energy vehicle (1) for braking the new energy vehicle (1).

10. The oblique impact test system for the bottom battery pack of a new energy vehicle according to claim 8, characterized in that, It also includes a triggering device (9), which is mounted on the track (2) and located between the ejection assembly (5) and the release device (74). The triggering device (9) is controlled to the ejection assembly (5). The triggering device (9) is configured to control the ejection assembly (5) to release the impact simulator (4) when the new energy vehicle (1) moves to the triggering device (9), so that the impact simulator (4) impacts the moving battery pack (3).

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