A power battery bottom scraping detection device and a detection method

Abstract

The application relates to the technical field of battery detection equipment, in particular to a power battery bottom scraping detection device and a detection method, which comprises a mounting plate arranged on the ground, a detection assembly arranged on the mounting plate and a mounting trolley slidingly connected to the mounting plate. The detection assembly comprises a first limiting plate, a second limiting plate and a detection piece slidingly connected to the first limiting plate and the second limiting plate. The first limiting plate and the second limiting plate are arranged in parallel and at intervals. An inclined sliding channel is formed between the first limiting plate and the second limiting plate. The sliding channel is arranged at an angle with the track. The detection piece moves in the sliding channel. The detection piece comprises a mounting seat slidingly connected in the sliding channel, a mounting shaft rotationally connected to the mounting seat and a detection block fixed to the mounting shaft. The application has the effect of improving the accuracy of battery pack data detection.

Description

Technical Field

[0001] This application relates to the technical field of battery testing equipment, and in particular to a power battery bottom scraping detection device and testing method. Background Technology

[0002] With the rapid growth in vehicle sales and ownership, electric vehicles are increasingly entering complex road environments such as cities, rural areas, and even mountainous regions. During use, the safety of the onboard battery pack is becoming increasingly important. Since vehicles may be subjected to various collisions during operation, research shows that battery pack damage caused by undercarriage scrapes and impacts is one of the significant causes of electric vehicle fires or explosions. Therefore, conducting collision testing on onboard battery packs to assess their safety performance under different collision conditions is a crucial step in ensuring the safe operation of new energy vehicles.

[0003] For example, Chinese patent application CN116879062A discloses a method for bottom-impact testing of a power battery. The method includes: acquiring probability information of bottom-impact accidents in various test areas of the bottom of the power battery; acquiring simulated weak point information of each test area of ​​the bottom of the power battery; determining at least one bottom-impact test ball impact point location based on the probability information and simulated weak point information of each test area; initializing the power battery so that its initial performance parameters meet a preset parameter range, the preset parameter range being adjusted based on different bottom-impact test scenarios; and conducting a ball impact test on the bottom of the power battery according to the bottom-impact test ball impact point location; the method based on each test area... The method determines at least one impact point location for a bottoming-out test ball based on the probability information and simulation weakness information of each test area. This includes: calculating a comprehensive score for each test area based on the probability information and simulation weakness information of each test area, wherein the comprehensive score is positively correlated with the probability of each test area suffering a bottoming-out accident, and the ball impact point score is positively correlated with the number and degree of simulation weakness of each test area; determining at least one impact point location for a bottoming-out test ball based on each comprehensive score; and fully covering sudden accidents where multiple locations on the bottom of the power battery are simultaneously impacted and collided with external obstacles during use, thereby fully verifying whether the structural strength of the bottom of the power battery meets the design requirements of the vehicle and achieving a more comprehensive safety evaluation of the power battery.

[0004] In the aforementioned technologies, the ball impact test simulates the movement of a battery pack while a ball is fixed on the ground. The bottom of the moving battery pack impacts the ball, and battery data is recorded after the impact. However, in actual vehicle use, due to the uncontrollable nature of road surfaces, there are not only fixed objects scraping the bottom of the battery pack, but also rolling and sharp objects. During vehicle operation, when sharp objects are lifted up, they can also damage the bottom of the battery pack. The ball impact test alone cannot reflect different types of impact simulations, which can lead to a discrepancy between the actual damage to the battery pack when scraped or impacted and the test results, thus affecting the accuracy of the overall assessment of battery safety performance. Summary of the Invention

[0005] This application provides a power battery scratch detection device and method, aiming to solve the problem in the related technology that there is a discrepancy between the damage of the battery pack when it is actually scratched or impacted and the test results.

[0006] The technical solution of the power battery bottom scraping detection device and detection method provided in this application is as follows:

[0007] First aspect:

[0008] A power battery bottom scraping detection device includes a mounting plate set on the ground, a detection component set on the mounting plate, and a mounting trolley slidably connected to the mounting plate. The battery pack to be tested is fixed on the mounting trolley. The detection component includes a first limiting plate and a second limiting plate, and a detection element slidably connected to the first limiting plate and the second limiting plate. The first limiting plate and the second limiting plate are arranged parallel and spaced apart, forming an inclined sliding channel between the first limiting plate and the second limiting plate. The sliding channel is angled to a track. The detection element moves within the sliding channel. The detection element includes a mounting base slidably connected within the sliding channel, a mounting shaft rotatably connected to the mounting base, and a detection block fixed to the mounting shaft. The detection block protrudes from the mounting plate and is used to impact the bottom of the battery pack.

[0009] By adopting the above technical solution, when a bottom scraping test of the battery pack is required, the battery pack is fixed on the mounting trolley, and then the weight of the mounting trolley is adjusted. Under the action of the drive motor, the mounting trolley slides on the mounting plate. During the sliding process, it will collide with the detection block in the sliding channel. During the collision, the detection block will hit the bottom of the battery pack. When the detection block can no longer slide at the bottom of the battery pack, the battery pack and the detection block will move simultaneously. Since the sliding channel is set as an inclined structure, when the mounting trolley and the battery pack move along the X-axis, the detection block also moves along the X-axis. At the same time, the detection block will also move along the Y-axis. During the movement of the detection block along the Y-axis, it will generate friction with the bottom of the battery pack, allowing the detection block to detect different positions on the bottom of the battery pack, thereby improving the accuracy of battery pack data detection.

[0010] Optionally, the mounting base includes a first mounting part, a connecting part, and a second mounting part. The width of the first mounting part is greater than the width of the sliding channel, and the width of the second mounting part is also greater than the width of the sliding channel. The width of the connecting part is the same as the width of the sliding channel. A first connecting component is provided on the first mounting part to connect the first mounting part and the connecting part. A second connecting component is provided on the second mounting part to mount the connecting part on the second mounting part.

[0011] By adopting the above technical solution, since the width of the first mounting part and the second mounting part are both greater than the width of the sliding channel, it is possible to prevent the mounting seat from detaching from the sliding channel. Under the action of the first connecting component and the second connecting component, it is convenient to replace the deformed detection block or mounting seat.

[0012] Optionally, the first connecting assembly includes a first connecting block fixed on the first mounting portion, a first connecting groove formed on the connecting portion, and a first connecting bolt passing through the connecting portion and the first connecting block.

[0013] By adopting the above technical solution, when the detection block is deformed and needs to be replaced, simply rotate the nut to remove the first bolt from the first connecting block and the connecting part, and remove the first connecting block and the first mounting part from the first connecting groove. During the installation process, insert the first connecting block into the first connecting groove and fix it with the first connecting bolt and nut. This achieves the purpose of facilitating the installation and replacement of the first mounting part and the detection block on the first mounting part.

[0014] Optionally, the second connecting assembly includes a second connecting block fixed on the connecting portion, a second connecting groove formed on the second connecting block, and a second connecting bolt passing through the second mounting portion and the second connecting block.

[0015] By adopting the above technical solution, when the connecting part is deformed and needs to be replaced, simply rotate the nut to remove the second connecting bolt from the second mounting part and the second connecting block, and remove the second connecting block and the connecting part from the second connecting groove. During the installation process, insert the second connecting block into the second connecting groove and fix it with the second connecting bolt and nut, thus achieving the purpose of facilitating the installation and replacement of the connecting part and the second mounting part.

[0016] Optionally, the mounting plate is provided with a positioning component for positioning the positions of the first limiting plate and the second limiting plate; the positioning component includes a first positioning plate and a second positioning plate fixed on the mounting plate, the first positioning plate and the second positioning plate are fixedly connected by bolts, the first positioning plate and the second positioning plate are arranged parallel to each other and spaced apart, and the first limiting plate and the second limiting plate are arranged between the first positioning plate and the second positioning plate.

[0017] By adopting the above technical solution, the first limiting plate and the second limiting plate are arranged in parallel and spaced apart. When installing the first limiting plate and the second limiting plate, the first limiting plate and the second limiting plate are directly placed between the first positioning plate and the second positioning plate, so as to facilitate the installation of the first limiting plate and the second limiting plate.

[0018] Optionally, the mounting plate is provided with a reset assembly for resetting the moving mounting base; the reset assembly includes a reset spring fixed on the mounting plate and a reset plate fixed on the reset spring, the reset plate is slidably connected in the sliding channel, and a clearance groove is provided on the reset plate for making way for the first connecting bolt and nut.

[0019] Optionally, the second positioning plate is provided with a pushing assembly for pushing the detection block to rotate around the mounting axis. The pushing assembly includes a pushing block fixed on the second positioning plate and a pushing surface disposed on the detection block, the pushing surface being inclined.

[0020] By adopting the above technical solution, during the movement of the detection block, the pushing surface will abut against the pushing block, and the pushing block will push the detection block to rotate upward. At this time, it can simulate that an object suddenly rises from the ground and impacts the bottom of the battery pack, thus making the entire test data more comprehensive.

[0021] Optionally, a reinforcing strip is provided on the first limiting plate and a reinforcing strip is also provided on the second limiting plate. The two reinforcing strips are used to improve the strength of both sides of the sliding channel.

[0022] Optionally, a handle is fixedly installed on the first limiting plate, and a handle is also fixedly installed on the second limiting plate.

[0023] By adopting the above technical solution, since both the first limiting plate and the second limiting plate are provided with handles, it is convenient to remove the first limiting plate and the second limiting plate from between the first positioning plate and the second positioning plate after the bolts are separated from the fixing plate. At the same time, it is also convenient to place the first limiting plate and the second limiting plate between the first positioning plate and the second positioning plate.

[0024] The second aspect:

[0025] A method for detecting bottom scratches on a power battery includes the following steps:

[0026] S1: The battery pack is fixed on the installation trolley. The drive motor drives the installation trolley to slide on the track, causing the bottom of the battery pack to hit the detection block.

[0027] S2: The pusher block drives the detection block to rotate, and the detection block impacts the bottom of the battery pack;

[0028] S3: After the battery pack detaches from the detection block, the corresponding data of the battery pack is recorded, and the reset board is reset.

[0029] By adopting the above technical solution, the installation trolley moves along the track, and the detection block in the inclined sliding channel applies a physical impact to the bottom of the battery pack. During a complete impact, due to the action of the sliding channel, the detection block can move synchronously in two mutually perpendicular directions. This characteristic can continuously apply pressure to the bottom of the battery pack at different angles until the predetermined position is reached. As the installation trolley continues to move, the pushing surface on the detection block will abut against the pushing block, and the pushing block will push the horizontally positioned detection block to rotate around the installation axis, thereby simulating the effect of an object tilting up and impacting the battery pack in reality. Since the detection block can simulate different types of collisions, this not only comprehensively covers various potential risk points, but also helps to collect richer and more accurate data information, providing strong support for the final determination of product reliability.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. Because the sliding channel is set as an inclined structure, the detection block will move simultaneously along the X-axis and Y-axis. The installation trolley and the battery pack drive the detection block to move simultaneously along the X-axis and the Y-axis. During the movement of the detection block along the Y-axis, it will rub against the bottom of the battery pack, allowing the detection block to detect different positions on the bottom of the battery pack, thereby improving the accuracy of battery pack data detection.

[0032] 2. During the movement of the detection block, the pushing surface will abut against the pushing block, and the pushing block will push the detection block to rotate upward. At this time, it can simulate that an object suddenly rises from the ground and impacts the bottom of the battery pack, so that the entire test data can be more comprehensive. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0034] Figure 2 This is a schematic diagram of the detection component structure according to an embodiment of this application.

[0035] Figure 3 This is a schematic diagram of the positioning component structure according to an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the structure of the fixing plate and the second mounting part according to an embodiment of this application.

[0037] Figure 5 This is a cross-sectional view of the mounting base according to an embodiment of this application.

[0038] Figure 6 This is the main view of the detection component in an embodiment of this application.

[0039] Reference numerals: 1. Mounting plate; 11. Track; 12. Mounting trolley; 13. Mounting groove; 14. Fixing plate; 15. Reinforcing strip; 16. Handle; 2. Detection assembly; 21. First limiting plate; 22. Second limiting plate; 23. Sliding channel; 3. Detection component; 31. Mounting base; 311. First mounting part; 312. Connecting part; 313. Second mounting part; 32. Mounting shaft; 33. Detection block; 4. First connecting assembly; 41. First connecting block; 42. First connecting groove; 43. First connecting bolt; 5. Second connecting assembly; 51. Second connecting block; 52. Second connecting groove; 53. Second connecting bolt; 6. Positioning assembly; 61. First positioning plate; 62. Second positioning plate; 7. Reset assembly; 71. Reset spring; 72. Reset plate; 8. Pushing assembly; 81. Pushing block; 82. Pushing surface. Detailed Implementation

[0040] The following combination Figures 1-6 This application will be described in further detail.

[0041] First aspect:

[0042] This application discloses a device for detecting bottom scratches on a power battery. (Refer to...) Figures 1 to 3 A power battery scraping detection device includes a mounting plate 1 set on the ground and a detection component 2 set on the mounting plate 1. The mounting plate 1 is provided with a rotating wheel, and the battery pack is installed on the mounting plate 1. At the same time, a track 11 is fixed to the mounting plate 1 by bolts. The rotating wheel is slidably connected to the track 11. A drive motor is provided on the mounting trolley 12. The output shaft of the drive motor is fixedly connected to the rotating wheel. The drive motor drives the rotating wheel to rotate, and then the mounting trolley 12 slides in the track 11. During the sliding of the mounting trolley 12, the battery pack will move. Then the detection component 2 detects the battery pack on the mounting trolley 12.

[0043] In this embodiment, the moving speed of the mounting trolley 12 on the track 11 can be changed by adjusting the rotation speed of the drive motor, and the weight of the entire mounting trolley 12 can be changed by setting a counterweight on the mounting plate 1. The weight of the mounting trolley 12 and the moving speed of the mounting trolley 12 can be selected according to the actual testing.

[0044] Reference Figures 1 to 3An installation groove 13 is provided on the installation plate 1, and the detection component 2 is set in the installation groove 13. A fixing plate 14 is fixedly installed at the bottom of the installation groove 13, and the detection component 2 is fixed to the fixing plate 14 by bolts. The detection component 2 includes a first limiting plate 21 and a second limiting plate 22, and a detection element 3 slidably connected to the first limiting plate 21 and the second limiting plate 22. The first limiting plate 21 and the second limiting plate 22 are arranged in parallel and spaced apart, and an inclined sliding channel 23 is formed between the first limiting plate 21 and the second limiting plate 22. The sliding channel 23 is set at an angle to the track 11. The detection element 3 moves in the sliding channel 23. Since the detection element 3 slides in the inclined sliding channel 23, it is equivalent to moving in both the X and Y directions at the same time. During the process of the installation trolley 12 moving the battery pack, it impacts the bottom of the battery pack in different directions, thereby realizing the detection of the bottom of the battery pack in different positions. In this embodiment, the length direction of the track 11 is defined as the X-axis direction, and the direction perpendicular to the X-axis is defined as the Y-axis direction.

[0045] Reference Figures 2 to 6 The detection component 3 includes a mounting base 31 slidably connected in the sliding channel 23, a mounting shaft 32 rotatably connected to the mounting base 31, and a detection block 33 fixed on the mounting shaft 32. The detection block 33 protrudes from the mounting plate 1. During the movement of the mounting trolley 12, the detection block 33 will impact the bottom of the battery pack. After the bottom of the battery pack is impacted, the appearance and temperature of the battery pack are detected. Since the detection block 33 and the battery pack are physically impacted, it is easy to directly observe the damage to the battery pack.

[0046] Reference Figures 2 to 6 The mounting base 31 includes a first mounting part 311, a connecting part 312, and a second mounting part 313. The width of the first mounting part 311 is greater than the width of the sliding channel 23, and the width of the second mounting part 313 is also greater than the width of the sliding channel 23. The width of the connecting part 312 is the same as the width of the sliding channel 23. A first connecting component 4 is provided on the first mounting part 311 to connect the first mounting part 311 and the connecting part 312. A second connecting component 5 is provided on the second mounting part 313 to mount the connecting part 312 on the second mounting part 313. During long-term impact, the detection block 33 is prone to deformation, and the connecting part 312 is also prone to deformation. When the detection block 33 is deformed, the first mounting part 311 is directly removed from the connecting part 312. When the connecting part 312 is deformed, the connecting part 312 is removed from the second mounting part 313.

[0047] Reference Figures 2 to 6The first connecting assembly 4 includes a first connecting block 41 fixed on the first mounting portion 311, a first connecting groove 42 formed on the connecting portion 312, and a first connecting bolt 43 passing through the connecting portion 312 and the first connecting block 41. When the first connecting bolt 43 passes through the first connecting block 41 and the connecting portion 312, the first connecting bolt 43 is fixed by a nut to achieve the purpose of fixing the first mounting portion 311. When it is necessary to fix the first mounting portion 311, the first connecting block 41 is inserted into the first connecting groove 42, and the first connecting block 41 is fixed on the connecting portion 312 by the first connecting bolt 43 and the nut. When the detection block 33, the mounting shaft 32, or the mounting seat 31 are deformed and need to be replaced, the first connecting bolt 43 is removed, and the first mounting portion 311 is directly pulled off the connecting portion 312 to facilitate the installation and disassembly of the first mounting portion 311.

[0048] Reference Figures 2 to 6 The second connecting component 5 includes a second connecting block 51 fixed on the connecting part 312, a second connecting groove 52 formed on the second connecting block 51, and a second connecting bolt 53 passing through the second mounting part 313 and the second connecting block 51. The second connecting bolt 53 passes through the second mounting part 313 and the second connecting block 51, and is fixed by a nut to achieve the purpose of fixing the connecting part 312. When it is necessary to fix the second mounting part 313, the second connecting block 51 is inserted into the second connecting groove 52, and the second connecting block 51 is fixed on the second connecting part 312 by the second connecting bolt 53 and the nut. When it is necessary to replace the connecting part 312, the second connecting bolt 53 and the nut are removed, and the connecting part 312 is directly pulled off the second mounting part 313, so as to facilitate the installation and disassembly of the connecting part 312.

[0049] Reference Figures 1 to 3 A reinforcing strip 15 is provided on the first limiting plate 21 and a reinforcing strip 15 is also provided on the second limiting plate 22. The two reinforcing strips 15 can improve the strength of both sides of the sliding channel 23. During the testing process, the mounting seat 31 can be reduced from coming out of the sliding channel 23, making the mounting seat 31 more stable when moving.

[0050] Reference Figures 2 to 6 A positioning component 6 is provided on the base. The positioning component 6 is used to position the first limiting plate 21 and the second limiting plate 22, so that the first limiting plate 21 and the second limiting plate 22 can be installed on the mounting plate 1. The positioning component 6 includes a first positioning plate 61 and a second positioning plate 62 fixed on the mounting plate 1. The first positioning plate 61 and the second positioning plate 62 are both fixedly connected by bolts. The first positioning plate 61 and the second positioning plate 62 are arranged in parallel and spaced apart. The first limiting plate 21 and the second limiting plate 22 are arranged between the first positioning plate 61 and the second positioning plate 62.

[0051] To facilitate the removal of the first limiting plate 21 and the second limiting plate 22 from between the first positioning plate 61 and the second positioning plate 62, a handle 16 is fixedly installed on the first limiting plate 21 and the second limiting plate 22. After removing the bolts on the first limiting plate 21 and the second limiting plate 22, the operator can directly remove the first limiting plate 21 and the second limiting plate 22 from between the first positioning plate 61 and the second positioning plate 62 through the handle 16, thereby improving the efficiency of the installation and removal of the first limiting plate 21 and the second limiting plate 22.

[0052] When installing the detection component 2, firstly, the first limiting plate 21 is placed between the first positioning plate 61 and the second positioning plate 62, and the first limiting plate 21 is fixed to the fixing plate 14 with bolts. Then, the mounting base 31 is placed into the sliding channel 23, and the side of the connecting part 312 abuts against the first limiting plate 21, and the bottom of the first mounting part 311 also abuts against the first limiting plate 21. Then, the second limiting plate 22 is placed between the first positioning plate 61 and the second positioning plate 62, and the second limiting plate 22 is limited by the first positioning plate 61 and the second positioning plate 62. After the second limiting plate 22 is fixed by bolts, the connecting part 312 in the sliding channel 23 is limited, and the connecting part 312 can only slide along the length direction of the sliding channel 23.

[0053] Reference Figures 2 to 6 A reset assembly 7 is provided on the mounting plate 1. The reset assembly 7 is used to reset the moved mounting base 31. The reset assembly 7 includes a reset spring 71 fixed on the mounting plate 1 and a reset plate 72 fixed on the reset spring 71. The reset plate 72 is slidably connected in the sliding channel 23 and has a clearance groove for the first connecting bolt 43 and nut. After the mounting trolley 12 collides with the detection block 33, the mounting trolley 12 will drive the detection block 33 and the mounting base 31 to move in the sliding channel 23. During the movement of the mounting base 31, it will abut against the reset plate 72, and then the reset spring 71 will be compressed. During the compression process, it will gradually charge. When the battery pack is no longer in contact with the detection block 33, the reset spring 71 pushes the mounting base 31 and the detection block 33 to reset, which facilitates the subsequent testing of the battery pack.

[0054] Because the mounting base 31 moves within the inclined sliding channel 23, it moves along the X and Y axes during the movement of the mounting carriage 12, resulting in more detection positions and more accurate battery pack detection data compared to existing technologies.

[0055] Reference Figures 2 to 6A pushing assembly 8 is provided on the second positioning plate 62 for pushing the detection block 33 to rotate around the mounting shaft 32. The pushing assembly 8 includes a pushing block 81 fixed on the second positioning plate 62 and a pushing surface 82 provided on the detection block 33. The pushing surface 82 is inclined. Under the action of the pushing surface 82, the end of the detection block 33 near the pushing block 81 is set as a pointed structure, while the end of the detection block 33 away from the pushing block 81 is set as an arc-shaped structure, which facilitates the pushing block 81 to push the detection block 33 to rotate around the mounting shaft 32. In the initial state, the return spring 71 is at its natural length, the lower end face of the detection block 33 abuts against the first mounting part 311, and both the upper and lower surfaces of the detection block 33 are set as planes. The first mounting part 311 is provided with an arc-shaped surface, which limits the rotation of the detection block 33, so that the detection block 33 can only rotate 90 degrees. After the detection block 33 separates from the bottom of the battery pack, the detection block 33 resets under the action of gravity.

[0056] After the battery pack on the mounting trolley 12 collides with the detection block 33, the detection block 33, the mounting base 31, and the battery pack move simultaneously. Under the action of the sliding channel 23, the mounting base 31 and the detection block 33 move along the X and Y axes. During the movement, the pushing surface 82 contacts the pushing block 81, and the pushing block 81 pushes the detection block 33 to rotate upward around the mounting axis 32. During the rotation, the tip of the detection block 33 will collide with the bottom of the battery pack. This can simulate the situation in the prior art where an object is lifted up at the bottom of the battery pack. When the second mounting part 313 abuts against the second positioning plate 62, the mounting base 31 cannot move. The mounting trolley 12 drives the battery pack to continue moving. During the movement, the vertically rotated detection block 33 will scrape the bottom of the battery pack. Since the detection block 33 can simulate different types of collisions, the data detected by the battery pack during the battery pack impact test is more accurate.

[0057] The implementation principle of the power battery bottom scratch detection device in this application embodiment is as follows: The device simulates the bottom collision and scratching situations that the battery pack may encounter during actual use, and performs impact and wear tests on the battery pack to detect its explosion-proof capability. First, the battery pack is fixed on the mounting carriage 12, which is connected to a drive motor. The drive motor drives the mounting carriage 12 to move on the track 11. By adjusting the speed of the drive motor, the moving speed of the mounting carriage 12 can be controlled to adapt to different testing requirements. At the same time, by setting a counterweight on the mounting plate 1, the weight of the entire mounting carriage 12 can be changed to further simulate different working conditions in actual use.

[0058] When the installation trolley 12 moves with the battery pack under the action of the drive motor, the bottom of the battery pack impacts the detection block 33. The detection block 33 then moves within the sliding channel 23, and due to its special structure (such as the protruding detection block 33), it physically impacts the bottom of the battery pack. This impact not only helps to directly observe the external damage of the battery pack, but also allows for the assessment of the integrity of the internal structure by monitoring parameters such as temperature changes. Furthermore, due to the replaceable design, any parts that are deformed or damaged due to long-term use can be easily replaced, ensuring the continuous and effective operation of the equipment.

[0059] After the battery pack on the mounting trolley 12 collides with the detection block 33, the detection block 33, the mounting base 31, and the battery pack move simultaneously. Under the action of the sliding channel 23, the mounting base 31 and the detection block 33 move along the X and Y axes. During the movement, the pushing surface 82 contacts the pushing block 81, and the pushing block 81 pushes the detection block 33 to rotate upward around the mounting axis 32. During the rotation, the tip of the detection block 33 will collide with the bottom of the battery pack. This can simulate the situation in the prior art where an object is lifted up at the bottom of the battery pack. When the second mounting part 313 abuts against the second positioning plate 62, the mounting base 31 cannot move. The mounting trolley 12 drives the battery pack to continue moving. During the movement, the vertically rotated detection block 33 will scrape the bottom of the battery pack. Since the detection block 33 can simulate different types of collisions, the data detected by the battery pack during the battery pack impact test is more accurate.

[0060] The second aspect:

[0061] A method for detecting bottom scratches on a power battery includes the following steps:

[0062] S1: The battery pack is fixed on the mounting trolley 12. The drive motor drives the mounting trolley 12 to slide on the track 11, causing the bottom of the battery pack to hit the detection block 33.

[0063] S2: Pushing block 81 pushes detection block 33 to rotate, and detection block 33 impacts the bottom of the battery pack;

[0064] S3: After the battery pack is separated from the detection block 33, the corresponding data of the battery pack is recorded and the reset board 72 is reset.

[0065] The implementation principle of the power battery bottom scratch detection method in this application embodiment is as follows: When the equipment is started, as the installation trolley 12 moves along the track 11, the detection block 33 in the inclined sliding channel 23 applies a physical impact to the bottom of the battery pack. This direct contact method not only facilitates visual inspection of external damage, but also allows for comprehensive evaluation of the internal structural safety status in conjunction with temperature monitoring and other means. Considering that long-term repeated testing may lead to wear or deformation of certain components, this design adopts an easy-to-disassemble structural layout to ensure that any damaged parts can be quickly replaced, maintaining the efficient operation of the system.

[0066] During a complete impact, the detection block 33 moves synchronously in two mutually perpendicular directions due to a specific guiding mechanism. This feature allows for continuous pressure application to the target object at different angles until a predetermined position is reached. Further pushing at this point will cause the detection block 33, originally horizontal, to rotate around the mounting axis 32 to a vertical position, achieving an effect similar to an object being lifted in reality. This not only comprehensively covers various potential risk points but also helps collect richer and more accurate data, providing strong support for ultimately determining product reliability.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A power battery bottom scraping detection device, comprising a mounting plate (1) arranged on the ground, a detection assembly (2) arranged on the mounting plate (1), and a mounting trolley (12) slidingly connected to the mounting plate (1), wherein the battery pack to be detected is fixed on the mounting trolley (12), characterized in that: The detection assembly (2) comprises a first limiting plate (21), a second limiting plate (22) and a detection piece (3) slidably connected between the first limiting plate (21) and the second limiting plate (22), the first limiting plate (21) and the second limiting plate (22) are arranged in parallel and at intervals, an inclined sliding channel (23) is formed between the first limiting plate (21) and the second limiting plate (22), the sliding channel (23) is arranged at an angle with the track (11), the detection piece (3) moves in the sliding channel (23), the detection piece (3) comprises a mounting seat (31) slidably connected in the sliding channel (23), a mounting shaft (32) rotatably connected to the mounting seat (31), and a detection block (33) fixed to the mounting shaft (32), the detection block (33) protrudes from the mounting plate (1) and is used for impacting the bottom of the battery pack; the sliding channel (23) is arranged in an inclined structure, the detection block (33) moves in the directions of the X-axis and the Y-axis at the same time, the mounting trolley (12) drives the detection block (33) to move in the direction of the X-axis at the same time, and the detection block (33) also moves in the direction of the Y-axis, the detection block (33) generates friction with the bottom of the battery pack during movement in the direction of the Y-axis, so that the detection block (33) can detect different positions of the bottom of the battery pack.

2. The power battery bottom scraping detection device according to claim 1, wherein: The mounting seat (31) comprises a first mounting portion (311), a connecting portion (312) and a second mounting portion (313), the width of the first mounting portion (311) is greater than the width of the sliding channel (23), the width of the second mounting portion (313) is also greater than the width of the sliding channel (23), the width of the connecting portion (312) is the same as the width of the sliding channel (23), a first connecting assembly (4) is arranged on the first mounting portion (311), the first connecting assembly (4) is used for connecting the first mounting portion (311) and the connecting portion (312), and a second connecting assembly (5) is arranged on the second mounting portion (313), the second connecting assembly (5) is used for mounting the connecting portion (312) on the second mounting portion (313).

3. The power battery bottom scraping detection device according to claim 2, characterized in that: The first connecting assembly (4) comprises a first connecting block (41) fixed to the first mounting portion (311), a first connecting groove (42) formed in the connecting portion (312), and a first connecting bolt (43) penetrating through the connecting portion (312) and the first connecting block (41).

4. The power battery bottom scraping detection device according to claim 2, characterized in that: The second connecting assembly (5) comprises a second connecting block (51) fixed to the connecting portion (312), a second connecting groove (52) formed in the second connecting block (51), and a second connecting bolt (53) penetrating through the second mounting portion (313) and the second connecting block (51).

5. The power battery bottom scraping detection device according to claim 3, characterized in that: The mounting plate (1) is provided with a positioning assembly (6) for positioning the positions of the first limiting plate (21) and the second limiting plate (22); the positioning assembly (6) comprises a first positioning plate (61) and a second positioning plate (62) fixed on the mounting plate (1), the first positioning plate (61) and the second positioning plate (62) are fixedly connected by bolts, the first positioning plate (61) and the second positioning plate (62) are arranged in parallel and are spaced apart, and the first limiting plate (21) and the second limiting plate (22) are arranged between the first positioning plate (61) and the second positioning plate (62).

6. The power battery bottom scraping detection device according to claim 5, characterized in that: The mounting plate (1) is provided with a reset assembly (7) for resetting the mounting seat (31) after movement; the reset assembly (7) comprises a reset spring (71) fixed on the mounting plate (1) and a reset plate (72) fixed on the reset spring (71), the reset plate (72) is slidingly connected in the sliding channel (23), and a clearance groove is arranged on the reset plate (72) for providing clearance for the first connecting bolt (43) and the nut.

7. The power battery bottom scraping detection device according to claim 6, characterized in that: The second positioning plate (62) is provided with a pushing assembly (8) for pushing the detection block (33) to rotate around the mounting shaft (32), the pushing assembly (8) comprises a pushing block (81) fixed on the second positioning plate (62) and a pushing surface (82) arranged on the detection block (33), and the pushing surface (82) is arranged obliquely.

8. The power battery bottom scraping detection device according to claim 1, characterized in that: The first limiting plate (21) is provided with a reinforcing strip (15), and the second limiting plate (22) is also provided with a reinforcing strip (15), and the two reinforcing strips (15) are used for improving the strength of the two sides of the sliding channel (23).

9. The power battery bottom scraping detection device according to claim 1, characterized in that: The first limiting plate (21) is fixedly provided with a handle (16), and the second limiting plate (22) is also fixedly provided with a handle (16).

10. A method for detecting a dead bottom of a power battery, characterized in that: The power battery bottom scraping detection device of claim 7 comprises the following steps: S1: the battery pack is fixed on the mounting trolley (12), the driving motor drives the mounting trolley (12) to slide on the track (11), so that the bottom of the battery pack impacts the detection block (33); S2: the pushing block (81) pushes the detection block (33) to rotate, and the detection block (33) impacts the bottom of the battery pack; S3: after the battery pack is separated from the detection block (33), the corresponding data of the battery pack is recorded, and the reset plate (72) is reset.

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