Battery pack bottom scraping test device and test method

Abstract

The present invention relates to the technical field of electric vehicle test devices, and discloses a battery pack bottom scraping test device and test method, the device comprising: a trolley; a battery pack fixing module, comprising a connecting piece and a left fixing group and a right fixing group, the connecting position of the connecting piece on the left fixing group and the right fixing group can be adjusted left and right; the left fixing group and the right fixing group both comprise an upper connecting bracket, a lower connecting bracket, a fixing bracket and an angle adjusting piece, the installation height of the fixing bracket on the lower connecting bracket is adjustable to adjust the height of the battery pack; the angle adjusting piece can be counteracted with the lower connecting bracket through different angle adjusting inclined surfaces to adjust the inclination angle of the battery pack; it also comprises a ball barrier module; the trolley can move toward the ball barrier module to make the battery pack collide with the ball head assembly. The advantages of the present invention are that the device can adjust the height and inclination of the battery pack, and the adjustment is convenient; it can adapt to battery packs of different widths and specifications, has good versatility, and has a simple overall structure and a compact size.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle testing devices, and in particular to a battery pack bottom scraping testing device and a testing method. Background Art

[0002] The battery pack bottom scraping test is a safety performance test for electric vehicle batteries. It simulates the situation where the bottom of an electric vehicle is hit or scratched during driving, so as to evaluate the safety performance of the battery pack in this situation.

[0003] In the existing battery pack bottom scraping test, the battery pack is first fixed to the bottom of the test trolley by a fixing device, and then the test trolley is driven towards a pre-set barrier and the battery pack collides with the barrier. The height and inclination angle of the battery pack are adjusted by adjusting the fixing device, and the experiment is performed multiple times to ensure the integrity of the test data. However, in the existing battery pack bottom scraping test device, the battery pack fixing device has a complex structure and a large volume, and the height and inclination of the battery pack are difficult to adjust.

[0004] For example, the patent application with the publication number "CN117740400A" discloses a battery pack bottom scraping test method and device, which includes: a mounting frame and a trolley; the mounting frame is a door-shaped mounting frame, which is arranged on the trolley, and the brackets on both sides of the mounting frame are located on both sides of the trolley. The bottom surface of the brackets of the mounting frame is provided with a plurality of mounting brackets, which are used to be fixedly connected with the battery pack to be tested by bolts, and the battery pack to be tested is fixed under the mounting frame; the mounting bracket includes: a first bracket and a second bracket; one end of the first bracket is fixedly connected to the mounting frame, and the other end is fixedly connected to one end of the second bracket, and a connecting hole is provided on the other end of the second bracket, which is used to connect the battery pack to be tested; a height adjustment device is provided in the middle of the mounting frame, and the height adjustment device is connected to the trolley, which is used to adjust the height of the battery pack to be tested from the ground. In this device, the fixed structure of the battery pack on the trolley is bulky and complex in structure; during the test, the height of the battery pack to be tested from the ground is adjusted by the screw rod, and when performing the bottom scraping test of the battery pack with different slopes, the operation is troublesome and inconvenient to use. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a battery pack bottom scraping test device and test method which has a simple structure, a small size, can be applied to battery packs of different models and specifications, and is easy to use.

[0006] The technical solution adopted by the present invention to solve the technical problem is to provide a battery pack bottom scraping test device, comprising:

[0007] A trolley, comprising a frame and wheels mounted on the frame;

[0008] A battery pack fixing module, arranged on the vehicle frame and used for fixing the battery pack;

[0009] The battery pack fixing module includes a connecting member and a left fixing group and a right fixing group arranged at intervals, the connecting member is fixedly connected to the frame, and one end of the connecting member is connected to the left fixing group, and the other end is connected to the right fixing group, and the connection position of the connecting member on the left fixing group and the right fixing group can be adjusted left and right to adjust the distance between the left fixing group and the right fixing group;

[0010] The left fixing group and the right fixing group each include an upper connecting bracket, a lower connecting bracket, a fixing bracket and an angle adjustment member, the lower connecting bracket is rotatably connected to the upper connecting bracket, the fixing bracket is mounted on the lower connecting bracket, and the battery pack is fixed between the fixing brackets of the left fixing group and the right fixing group; wherein the mounting height of the fixing bracket on the lower connecting bracket is adjustable to adjust the height of the battery pack; the angle adjustment member has a plurality of angle adjustment inclined surfaces with different inclination angles, the angle adjustment member can be padded between the upper connecting bracket and the lower connecting bracket, and can be offset against the lower connecting bracket through different angle adjustment inclined surfaces to adjust the inclination angle of the battery pack;

[0011] The ball barrier module comprises a base plate and a ball head assembly, wherein the ball head assembly is mounted on the base plate, and the mounting position of the ball head assembly on the base plate is adjustable; the trolley can move toward the ball barrier module to cause the battery pack to collide with the ball head assembly.

[0012] Further, the angle adjustment member has a first angle adjustment inclined surface, a second angle adjustment inclined surface and a third angle adjustment inclined surface which are adjacent to each other in sequence; the angle adjustment member has a first abutment plane on the opposite side of the first angle adjustment inclined surface, a second abutment plane on the opposite side of the second angle adjustment inclined surface, and a third abutment plane on the opposite side of the third angle adjustment inclined surface;

[0013] The angle between the first angle adjustment slope and the first abutment plane is a first angle, the angle between the second angle adjustment slope and the second abutment plane is a second angle, the angle between the third angle adjustment slope and the third abutment plane is a third angle, and the first angle, the second angle and the third angle are not equal.

[0014] Further, when the first abutting plane abuts against the upper connecting bracket, and the first angle adjustment inclined surface abuts against the lower connecting bracket, the inclination angle of the battery pack relative to the horizontal plane is equal to the first angle;

[0015] When the second abutting plane abuts against the upper connecting bracket, and the second angle adjustment inclined surface abuts against the lower connecting bracket, the inclination angle of the battery pack relative to the horizontal plane is equal to the second included angle;

[0016] When the third abutting plane abuts against the upper connecting bracket, and the third angle adjustment inclined surface abuts against the lower connecting bracket, the inclination angle of the battery pack relative to the horizontal plane is equal to the third included angle.

[0017] Furthermore, the angle adjustment piece is arranged in a polygonal column shape;

[0018] When the angle adjustment member is detached from between the upper connecting bracket and the lower connecting bracket, the battery pack can be adjusted to a horizontal state.

[0019] Furthermore, the lower connecting bracket is provided with a plurality of first gear slots, the fixing bracket is fixed in the first gear slot by a first fixing bolt, and the first fixing bolt can be switched among the plurality of first gear slots to adjust the height of the battery pack.

[0020] Further, the plurality of first gear slots are arranged in parallel and are located at different heights; one end of the plurality of first gear slots is connected through a first connecting slot, and the first fixing bolt can be switched between the plurality of first gear slots along the first connecting slot to adjust the height of the battery pack;

[0021] When the first fixing bolt fixes the fixing bracket in the first gear slot, a first locking piece is detachably provided on the first fixing bolt, one end of the first locking piece abuts against the first fixing bolt, and the other end of the first locking piece abuts against the side wall of the first connecting slot to lock the first fixing bolt.

[0022] Furthermore, the upper connecting bracket is provided with a plurality of second gear slots along its width direction, and the end of the connecting member is fixed in the second gear slot by a second fixing bolt; the second fixing bolt can be switched between the plurality of second gear slots to adjust the distance between the left fixing group and the right fixing group.

[0023] Further, one ends of the plurality of second gear slots are connected through the second connecting slot, and the second fixing bolt can switch between the plurality of second gear slots along the second connecting slot; wherein a row of the second gear slots is respectively provided on both sides of the second connecting slot on the upper connecting bracket, and one ends of the two rows of the second gear slots are both connected through the second connecting slot, and the two rows of the gear slots on both sides of the second connecting slot are staggered;

[0024] When the second fixing bolt fixes the end of the connecting member in one of the second gear slots, the second fixing bolt is also detachably provided with a second locking member, one end of the second locking member abuts against the second fixing bolt, and the other end of the second locking member abuts against the side wall of the second connecting slot to lock the second fixing bolt.

[0025] Furthermore, the bottom plate is provided with two parallel guide rails, and the installation position of the ball head assembly on the bottom plate can be adjusted by sliding along the guide rails; wherein the ball head assembly comprises a base, a plurality of pads and a ball head arranged in sequence from bottom to top, the base is located between the two guide rails, and the bolts can detachably fix the ball head assembly to the bottom plate;

[0026] The plurality of pads include pads of various different thicknesses, and one or more of the plurality of pads are arranged between the base and the ball head; wherein the thickness of the pads include 1 mm, 2 mm, 4 mm, 8 mm and 16 mm.

[0027] The technical solution adopted by the present invention to solve the technical problem is to also propose a battery pack bottom scraping test method, which is applied to the above-mentioned battery pack bottom scraping test device. The test method includes:

[0028] Adjusting the connection position of the connecting member on the left fixing group left and right, and adjusting the connection position of the connecting member on the right fixing group left and right to adapt to the width of the battery pack to be tested;

[0029] Fixing the battery pack to be tested between the fixing brackets of the left fixing group and the right fixing group;

[0030] Adjust the installation height of the fixed bracket on the lower connecting bracket to adjust the height of the battery pack; and place the angle adjustment member between the upper connecting bracket and the lower connecting bracket to adjust the inclination angle of the battery pack to be tested; or disengage the angle adjustment member from between the upper connecting bracket and the lower connecting bracket to make the battery pack to be tested in a horizontal state;

[0031] The trolley is moved toward the ball barrier module, and the battery pack to be tested is made to collide with the ball head assembly.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] In the present invention, the connection position of one end of the connecting member on the left fixing group can be adjusted left and right, and the connection position of the other end of the connecting member on the right fixing group can be adjusted left and right, so that the spacing between the left fixing group and the right fixing group can be adjusted, so that the battery pack fixing module can fix battery packs of different widths and specifications. In the left fixing group and the right fixing group, the installation height of the fixing bracket on the lower connecting bracket is adjustable, so that the height (i.e., the distance from the ground) of the battery pack is adjustable; the lower connecting bracket and the upper connecting bracket can be rotatably connected, and an angle adjustment piece can be placed between the two. The same angle adjustment piece can realize multi-angle adjustment between the lower connecting bracket and the upper connecting bracket, so as to realize the adjustment of different inclination angles of the battery pack. This test device can realize the height and inclination of the battery pack, and the adjustment is convenient; it can adapt to battery packs of different widths and specifications to ensure its versatility; and the overall structure is simple, compact and small in size.

[0034] In the present invention, the angle adjustment piece is provided with a first angle adjustment inclined plane, a second angle adjustment inclined plane and a third angle adjustment inclined plane which are adjacent to each other in sequence and have different inclination angles, and a first abutment plane, a second abutment plane and a third abutment plane are respectively arranged on the opposite sides of the three. Through the cooperation of the abutment plane and the angle adjustment plane, the battery pack can at least have three different inclination angles (for example: 3 degrees, 4 degrees and 5 degrees); the angle adjustment piece is detached from between the upper connecting bracket and the lower connecting bracket, so that the battery pack can be arranged horizontally (that is, not tilted). The structural design of the angle adjustment piece is ingenious and the angle adjustment is convenient.

[0035] In the present invention, when the height of the battery pack is adjusted, the first fixing bolt is switched along the first connecting groove between the plurality of first gear slots to ensure that the height of the battery pack is easily adjusted, and after the height is adjusted, the first fixing bolt is locked in the first gear slot by the first locking member to ensure good structural stability. When the spacing between the left fixing group and the right fixing group is adjusted to accommodate battery packs of different widths and specifications, the second fixing bolt is switched along the second connecting groove between the plurality of second gear slots to ensure that the spacing is easily adjusted, and after the adjustment is completed, the second fixing bolt is locked in the second gear slot by the second locking member to ensure structural stability.

[0036] In the present invention, two guide rails are arranged in parallel on the bottom plate, and the installation position of the ball head assembly on the bottom plate can be adjusted by sliding along the guide rails to ensure that the position of the ball head can be adjusted conveniently during the test. In the ball head assembly, the thickness of the pad has a variety of different specifications, and the ball head can be raised to any integer value between 1 mm and 31 mm by five pads of 1 mm, 2 mm, 4 mm, 8 mm and 16 mm, with a wide adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a battery pack bottom scraping test device of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of the battery pack fixing module;

[0039] Figure 3 for Figure 2 Schematic diagram of the structure after the central angle adjustment piece is detached;

[0040] Figure 4 It is an exploded schematic diagram of the upper connecting bracket, the lower connecting bracket and the fixing bracket;

[0041] Figure 5 It is a structural schematic diagram of the angle adjustment member;

[0042] Figure 6 for Figure 5 Schematic diagram of the plane;

[0043] Figure 7 is a schematic diagram of the structure of the first locking member / the second locking member;

[0044] Figure 8 It is a structural schematic diagram of the ball barrier module;

[0045] Fig. 9 Schematic diagram of the exploded view of the ball head assembly.

[0046] In the figure:

[0047] 1. Trolley; 10. Frame; 11. Wheels;

[0048] 2. Battery pack fixing module; 20. Connecting piece; 21. Left fixing group; 22. Right fixing group; 211. Upper connecting bracket; 212. Lower connecting bracket; 213. Fixing bracket; 214. Angle adjusting piece; 215. First fixing bolt; 216. First locking piece; 217. Second fixing bolt; 218. Second locking piece; 211A. Second gear slot; 211B. Second connecting slot; 212A. First gear slot; 212B. First connecting slot; 214A. First angle adjusting inclined plane; 214B. Second angle adjusting inclined plane; 214C. Third angle adjusting inclined plane; 214D. First abutting plane; 214E. Second abutting plane; 214F. Third abutting plane;

[0049] 3. Ball barrier module; 30. Base plate; 31. Ball head assembly; 301. Guide rail; 311. Base; 312. Pad; 313. Ball head. DETAILED DESCRIPTION

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0051] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] Embodiment 1:

[0056] like Figure 1-Figure 4 As shown, a battery pack bottom scraping test device mainly includes: a trolley 1, a battery pack fixing module 2 and a ball barrier module 3.

[0057] The trolley 1 includes a frame 10 and wheels 11 mounted on the frame 10. During the test, the entire test device can be moved by pulling the trolley 1.

[0058] The battery pack fixing module 2 is arranged on the vehicle frame 10 and is used to fix the battery pack. The battery pack is detachably fixed on the trolley 1 through the battery pack fixing module 2, simulating the installation method of the actual vehicle (electric vehicle) to ensure the accuracy of the test. In addition, in this embodiment, it is also convenient to adjust the height and inclination of the battery pack, and the battery pack can be quickly adjusted to the same installation position as that on the actual vehicle.

[0059] like Figure 2-Figure 4As shown, the battery pack fixing module 2 includes a connecting member 20 and a left fixing group 21 and a right fixing group 22 arranged at intervals. The left fixing group 21 and the right fixing group 22 are symmetrically arranged at the two ends of the connecting member 20. The connecting member 20 of this embodiment is a connecting plate. The connecting member 20 is fixedly connected to the frame 10. Specifically, a plurality of through holes are opened on the connecting member 20, and bolts pass through the through holes thereon to detachably fix it to the frame 10, so as to realize the detachable fixed connection between the battery pack fixing module 2 and the frame 10, and ensure convenient disassembly and assembly. Among them, one end of the connecting member 20 is connected to the left fixing group 21, and the other end of the connecting member 20 is connected to the right fixing group 22. The connection position of the connecting member 20 on the left fixing group 21 and the right fixing group 22 can be adjusted left and right to adjust the spacing between the left fixing group 21 and the right fixing group 22. By adjusting the fixed connection position of the connecting member 20 on the left fixing group 21 and the right fixing group 22 to the left and right, and then adjusting the distance between the left fixing group 21 and the right fixing group 22, it is ensured that battery packs of different widths and different models can be fixed on the battery pack fixing module 2 of this embodiment, thereby ensuring its versatility and wide range of application.

[0060] Specifically, the left fixing group 21 and the right fixing group 22 each include an upper connecting bracket 211, a lower connecting bracket 212, a fixing bracket 213 and an angle adjusting member 214. The lower connecting bracket 212 is rotatably connected to the upper connecting bracket 211. Specifically, the upper connecting bracket 211 and the lower connecting bracket 212 can be rotatably connected via a hinge, and the connection is simple. The fixing bracket 213 is installed on the lower connecting bracket 212, and the battery pack is fixed between the fixing brackets 213 of the left fixing group 21 and the right fixing group 22. Specifically, the fixing bracket 213 is L-shaped, including a vertically arranged connecting plate and a fixing plate, and a plurality of fixing holes are provided in the length direction of the fixing plate. Bolts pass through the through holes on the battery pack and the fixing holes on the fixing plate to detachably fix the battery pack on the fixing plate. The fixing holes on the fixing plate are waist-shaped, which is convenient for the insertion of bolts without precise alignment. Among them, the installation height of the fixing bracket 213 on the lower connecting bracket 212 is adjustable to adjust the height of the battery pack. Because the battery pack is fixedly installed on the fixing bracket 213, when the fixing bracket 213 is adjusted up and down, the height of the battery pack will change accordingly.

[0061] like Figure 2-Figure 6As shown, the angle adjustment piece 214 has a plurality of angle adjustment inclined surfaces with different inclination angles. The angle adjustment piece 214 can be arranged between the upper connecting bracket 211 and the lower connecting bracket 212, and can be abutted against the lower connecting bracket 212 through different angle adjustment inclined surfaces to adjust the inclination angle of the battery pack. Specifically, the angle adjustment piece 214 is arranged in a multi-prism shape. The angle adjustment piece 214 in this embodiment is preferably, but not limited to, an irregular hexagonal prism shape, and can be made of a hollow tube. The angle adjustment piece 214 has a first angle adjustment inclined surface 214A, a second angle adjustment inclined surface 214B, and a third angle adjustment inclined surface 214C adjacent to each other in sequence. The angle adjustment piece 214 has a first abutment plane 214D on the opposite side of the first angle adjustment inclined surface 214A, a second abutment plane 214E on the opposite side of the second angle adjustment inclined surface 214B, and a third abutment plane 214F on the opposite side of the third angle adjustment inclined surface 214C. The angle between the first angle adjustment inclined surface 214A and the first abutting plane 214D is a first angle (the angle is Figure 6 A1 in the figure), the angle between the second angle adjustment inclined surface 214B and the second abutting plane 214E is the second angle (the angle is Figure 6 A2 in the figure), the angle between the third angle adjustment inclined surface 214C and the third abutting plane 214F is the third angle (the angle is Figure 6 In the figure, the first angle A1, the second angle A2 and the third angle A3 are not equal. Preferably, among A1, A2 and A3, one is 3 degrees, one is 4 degrees and one is 5 degrees.

[0062] In actual use, when the first abutting plane 214D abuts against the upper connecting bracket 211 and the first angle adjustment slope 214A abuts against the lower connecting bracket 212, the inclination angle of the battery pack relative to the horizontal plane can be made equal to the first angle A1. When the second abutting plane 214E abuts against the upper connecting bracket 211 and the second angle adjustment slope 214B abuts against the lower connecting bracket 212, the inclination angle of the battery pack relative to the horizontal plane can be made equal to the second angle A2. When the third abutting plane 214F abuts against the upper connecting bracket 211 and the third angle adjustment slope 214C abuts against the lower connecting bracket 212, the inclination angle of the battery pack relative to the horizontal plane can be made equal to the third angle A3. When the angle adjustment member 214 is detached from between the upper connecting bracket 211 and the lower connecting bracket 212, the battery pack can be adjusted to a horizontal state. That is, in this embodiment, the tilt angle of the battery pack can be adjusted to at least 0 degrees, 3 degrees, 4 degrees and 5 degrees, and the tilt angle value can be selected according to actual needs.

[0063] In this embodiment, the angle adjustment piece 214 has a first angle adjustment inclined surface 214A, a second angle adjustment inclined surface 214B and a third angle adjustment inclined surface 214C which are adjacent to each other in sequence and have different inclination angles, and a first abutment plane 214D, a second abutment plane 214E and a third abutment plane 214F are respectively arranged on the opposite sides of the three. Through the cooperation of the abutment plane and the angle adjustment plane, the battery pack can at least have three different inclination angles (for example: 3 degrees, 4 degrees and 5 degrees); the angle adjustment piece 214 is detached from between the upper connecting bracket 211 and the lower connecting bracket 212, so that the battery pack can be arranged horizontally (that is, not tilted). The structural design of the angle adjustment piece 214 is ingenious and the angle adjustment is convenient.

[0064] More specifically, the lower connecting bracket 212 is provided with a plurality of first gear slots 212A, and the fixing bracket 213 is fixed in the first gear slot 212A by a first fixing bolt 215. In order to ensure reliable fixing, one or more nuts are provided on the first fixing bolt 215. In addition, the first fixing bolt 215 can be switched among the plurality of first gear slots 212A to adjust the height of the battery pack. The specific implementation method of the first fixing bolt 215 switching among the plurality of first gear slots 212A is as follows: the plurality of first gear slots 212A are arranged in parallel and are located at different heights. One end of the plurality of first gear slots 212A is connected through the first connecting slot 212B, and the first connecting slot 212B is perpendicular to the plurality of first gear slots 212A. The first fixing bolt 215 can switch among the plurality of first gear slots 212A along the first connecting slot 212B to adjust the height of the battery pack. During the switching process, the first fixing bolt 215 can be switched without being pulled out from the first gear slot 212A, and the adjustment is convenient.

[0065] Preferably, after the first fixing bolt 215 fixes the fixing bracket 213 in the first gear slot 212A, the first fixing bolt 215 may be detachably provided with a first locking member 216 (such as Figure 3 and Figure 7 As shown in FIG. 2 ), one end of the first locking member 216 abuts against the first fixing bolt 215, and the other end of the first locking member 216 abuts against the side wall of the first connecting groove 212B, locking the first fixing bolt 215. One end of the first locking member 216 has an arc surface, and the other end is a plane. The arc surface on the first locking member 216 abuts against the screw cylinder surface of the first fixing bolt 215, and the plane on the other end of the first locking member 216 abuts against the side wall of the first connecting groove 212B, ensuring that the first fixing bolt 215 is reliably locked, the first fixing bolt 215 will not shift, and the first locking member 216 is easy to disassemble and assemble.

[0066] More specifically, the upper connecting bracket 211 is provided with a plurality of second gear slots 211A along its width direction, and the end of the connecting member 20 is fixed in the second gear slot 211A by a second fixing bolt 217. The second fixing bolt 217 can be switched between the plurality of second gear slots 211A to adjust the spacing between the left fixing group 21 and the right fixing group 22, and adjust the spacing between the left fixing group 21 and the right fixing group 22 to be equal to the spacing of the battery pack to be tested, so as to ensure that the battery pack fixing module 2 can firmly fix the battery pack to be tested, and the battery pack fixing module 2 of this embodiment can adapt to battery packs of different widths and specifications.

[0067] Among them, one end of the plurality of second gear slots 211A is connected through the second connecting slot 211B, and the second fixing bolt 217 can switch between the plurality of second gear slots 211A along the second connecting slot 211B. A row of second gear slots 211A is respectively provided on both sides of the second connecting slot 211B on the upper connecting bracket 211, and one end of the two rows of second gear slots 211A are connected through the second connecting slot 211B. The two rows of gear slots on both sides of the second connecting slot 211B are staggered to ensure that as many gears as possible are ensured within a limited width range, so as to be applicable to more battery packs of different widths.

[0068] Preferably, when the second fixing bolt 217 fixes the end of the connecting member 20 in one of the second gear slots 211A, the second fixing bolt 217 may be detachably provided with a second locking member 218 (such as Figure 7 As shown in FIG. 2 ), one end of the second locking member 218 abuts against the second fixing bolt 217, and the other end of the second locking member 218 abuts against the side wall of the second communicating groove 211B, locking the second fixing bolt 217. The structure of the second locking member 218 is the same as that of the first locking member 216, that is, one end of the second locking member 218 has an arc surface, and the other end is a plane. The arc surface on the second locking member 218 abuts against the screw cylinder surface of the second fixing bolt 217, and the plane at the other end of the second locking member 218 abuts against the side wall of the second communicating groove 211B, ensuring that the second fixing bolt 217 is reliably locked, the second fixing bolt 217 will not be displaced, and the second locking member 218 is easy to disassemble and assemble.

[0069] In this embodiment, when the height of the battery pack is adjusted, the first fixing bolt 215 is switched along the first connecting groove 212B between the plurality of first gear slots 212A to ensure that the height of the battery pack is easily adjusted. After the height is adjusted, the first fixing bolt 215 is locked in the first gear slot 212A by the first locking member 216 to ensure good structural stability. When the spacing between the left fixing group 21 and the right fixing group 22 is adjusted to accommodate battery packs of different widths and specifications, the second fixing bolt 217 is switched along the second connecting groove 211B between the plurality of second gear slots 211A to ensure that the spacing is easily adjusted. After the adjustment is completed, the second fixing bolt 217 is locked in the second gear slot 211A by the second locking member 218 to ensure structural stability.

[0070] like Figure 8-Figure 9 As shown, the ball barrier module 3 includes a base plate 30 and a ball head assembly 31. The ball head assembly 31 is mounted on the base plate 30, and the mounting position of the ball head assembly 31 on the base plate 30 is adjustable. During the test, the trolley 1 can move toward the ball barrier module 3 to make the battery pack collide with the ball head assembly 31.

[0071] Two parallel guide rails 301 are provided on the bottom plate 30, and the installation position of the ball head assembly 31 on the bottom plate 30 can be adjusted by sliding along the guide rails 301. Specifically, the position of the ball head assembly 31 can be adjusted left and right, so that the ball head 313 can be aligned with the weakest position (and impact point) of the front end of the battery pack.

[0072] The ball head assembly 31 includes a base 311, a plurality of pads 312 and a ball head 313 arranged in sequence from bottom to top. The base 311 is located between the two guide rails 301. Bolts can detachably fix the ball head assembly 31 to the bottom plate 30. The two guide rails 301 press the base 311 against the bottom plate 30 to ensure that the ball head assembly 31 will not detach upward from the bottom plate 30. The plurality of pads 312 include pads 312 of various thicknesses, and one or more of the plurality of pads 312 are arranged between the base 311 and the ball head 313; the thickness of the pads 312 includes 1 mm, 2 mm, 4 mm, 8 mm and 16 mm.

[0073] It needs to be explained that the present embodiment provides five pads 312 with thicknesses of 1 mm, 2 mm, 4 mm, 8 mm and 16 mm. The purpose is to enable the pads 312 to raise the ball head 313 to any integer value between 1 mm and 31 mm, so that a small number of pads 312 can achieve a wide range of adjustment.

[0074] For example: when the pad height is 1 mm, a 1 mm pad 312 is selected; when the pad height is 2 mm, a 2 mm pad 312 is selected; when the pad height is 3 mm, a combination of 1 mm + 2 mm pads 312 is selected; when the pad height is 4 mm, a 4 mm pad 312 is selected; when the pad height is 5 mm, a combination of 2 mm + 4 mm pads 312 is selected; when the pad height is 6 mm, a combination of 2 mm + 4 mm pads 312 is selected; when the pad height is 7 mm, a combination of 1 mm + 2 mm + 4 mm pads 312 is selected; when the pad height is 8 mm, an 8 mm pad 312 is selected; when the pad height is 9 mm, a combination of 1 mm + 8 mm pads 312 is selected; when the pad height is 10 mm, a combination of 2 mm + 8 mm pads 312 is selected.

[0075] When the pad height is 11 mm, use the 1 mm + 2 mm + 8 mm pad 312 combination; when the pad height is 12 mm, use the 4 mm + 8 mm pad 312 combination; when the pad height is 13 mm, use the 1 mm + 4 mm + 8 mm pad 312 combination; when the pad height is 14 mm, use the 2 mm + 4 mm + 8 mm pad 312 combination; when the pad height is 15 mm, use the 1 mm + 2 mm + 4 mm + 8 mm pad When the pad height is 16 mm, a 16 mm pad 312 is selected; when the pad height is 17 mm, a 1 mm + 16 mm pad 312 combination is selected; when the pad height is 18 mm, a 2 mm + 16 mm pad 312 combination is selected; when the pad height is 19 mm, a 1 mm + 2 mm + 16 mm pad 312 combination is selected; when the pad height is 20 mm, a 4 mm + 16 mm pad 312 combination is selected;

[0076] When the pad height is 21 mm, use the combination of 1 mm + 4 mm + 16 mm pads 312; when the pad height is 22 mm, use the combination of 2 mm + 4 mm + 16 mm pads 312; when the pad height is 23 mm, use the combination of 1 mm + 2 mm + 4 mm + 16 mm pads 312; when the pad height is 24 mm, use the combination of 8 mm + 16 mm pads 312; when the pad height is 25 mm, use the combination of 1 mm + 8 mm + 16 mm pads 312; when the pad height is 26 mm, use 2 mm + 8 mm + 16 mm. The pad 312 combination is selected; when the pad height is 27 mm, the 1 mm + 2 mm + 8 mm + 16 mm pad 312 combination is selected; when the pad height is 28 mm, the 4 mm + 8 mm + 16 mm pad 312 combination is selected; when the pad height is 29 mm, the 1 mm + 4 mm + 8 mm + 16 mm pad 312 combination is selected; when the pad height is 30 mm, the 2 mm + 4 mm + 8 mm + 16 mm pad 312 combination is selected; when the pad height is 31, the 1 mm + 2 mm + 4 mm + 8 mm + 16 mm pad 312 combination is selected. That is, the five pads 312 of different thicknesses in this embodiment can achieve a pad height range of 1 mm to 31 mm.

[0077] In actual use, the connection position of one end of the connecting member 20 on the left fixing group 21 can be adjusted left and right, and the connection position of the other end of the connecting member 20 on the right fixing group 22 can be adjusted left and right, so that the spacing between the left fixing group 21 and the right fixing group 22 can be adjusted, so that the battery pack fixing module 2 can fix battery packs of different widths and specifications. In the left fixing group 21 and the right fixing group 22, the installation height of the fixing bracket 213 on the lower connecting bracket 212 is adjustable, so that the height (i.e., the distance from the ground) of the battery pack can be adjusted; the lower connecting bracket 212 and the upper connecting bracket 211 can be rotatably connected, and an angle adjustment member 214 can be placed between the two. The same angle adjustment member 214 can realize multi-angle adjustment between the lower connecting bracket 212 and the upper connecting bracket 211, thereby realizing the adjustment of different inclination angles of the battery pack. This test device can realize the height and inclination of the battery pack, and the adjustment is convenient; it can adapt to battery packs of different widths and specifications to ensure its versatility; and the overall structure is simple, compact and small in size.

[0078] Embodiment 2:

[0079] This embodiment provides a battery pack bottom scraping test method, which is applied to the battery pack bottom scraping test device in the first embodiment. The test method includes the following steps:

[0080] First, the connection position of the connecting member 20 on the left fixing group 21 and the connection position of the connecting member 20 on the right fixing group 22 are adjusted left and right to adapt to the width of the battery pack to be tested.

[0081] Then, the battery pack to be tested is fixed between the fixing brackets 213 of the left fixing group 21 and the right fixing group 22; that is, the fixing holes on the fixing plate of the fixing bracket 213 are aligned with the through holes on the side plate of the battery pack, and the battery pack is fixed on the fixing bracket 213 after the bolts pass through the through holes and the fixing holes.

[0082] Then, adjust the installation height of the fixed bracket 213 on the lower connecting bracket 212 to adjust the height of the battery pack; and, place the angle adjusting piece 214 between the upper connecting bracket 211 and the lower connecting bracket 212 to adjust the inclination angle of the battery pack to be tested; or separate the angle adjusting piece 214 from between the upper connecting bracket 211 and the lower connecting bracket 212 to make the battery pack to be tested in a horizontal state; the specific inclination angle value can be selected according to actual test needs.

[0083] Finally, the trolley 1 is moved toward the ball barrier module 3 , and the battery pack to be tested is made to collide with the ball head assembly 31 , specifically, the battery pack to be tested collides with the ball head 313 of the ball head assembly 31 .

[0084] In this solution, the test device can adjust the height and inclination of the battery pack, and the adjustment is convenient; it can be adapted to battery packs of different widths and specifications, has good versatility, and has a simple overall structure and a compact size.

Claims

1. A battery pack bottom scraping test device, characterized in that: include: A trolley, comprising a frame and wheels mounted on the frame; A battery pack fixing module, arranged on the frame, for fixing the battery pack; The battery pack fixing module includes a connecting member and a left fixing group and a right fixing group arranged at intervals, the connecting member is fixedly connected to the frame, and one end of the connecting member is connected to the left fixing group, and the other end is connected to the right fixing group, and the connection position of the connecting member on the left fixing group and the right fixing group can be adjusted left and right to adjust the distance between the left fixing group and the right fixing group; The left fixing group and the right fixing group each include an upper connecting bracket, a lower connecting bracket, a fixing bracket and an angle adjustment member, the lower connecting bracket is rotatably connected to the upper connecting bracket, the fixing bracket is mounted on the lower connecting bracket, and the battery pack is fixed between the fixing brackets of the left fixing group and the right fixing group; wherein the mounting height of the fixing bracket on the lower connecting bracket is adjustable to adjust the height of the battery pack; the angle adjustment member has a plurality of angle adjustment inclined surfaces with different inclination angles, the angle adjustment member can be padded between the upper connecting bracket and the lower connecting bracket, and can be offset against the lower connecting bracket through different angle adjustment inclined surfaces to adjust the inclination angle of the battery pack; The ball barrier module comprises a base plate and a ball head assembly, wherein the ball head assembly is mounted on the base plate, and the mounting position of the ball head assembly on the base plate is adjustable; the trolley can move toward the ball barrier module to cause the battery pack to collide with the ball head assembly.

2. The battery pack bottom scraping test device according to claim 1, characterized in that: The angle adjustment member has a first angle adjustment inclined surface, a second angle adjustment inclined surface and a third angle adjustment inclined surface which are adjacent to each other in sequence; the angle adjustment member is provided with a first abutting plane along the opposite side of the first angle adjustment inclined surface, a second abutting plane along the opposite side of the second angle adjustment inclined surface, and a third abutting plane along the opposite side of the third angle adjustment inclined surface; The angle between the first angle adjustment slope and the first abutment plane is a first angle, the angle between the second angle adjustment slope and the second abutment plane is a second angle, the angle between the third angle adjustment slope and the third abutment plane is a third angle, and the first angle, the second angle and the third angle are not equal.

3. The battery pack bottom scraping test device according to claim 2, characterized in that: When the first abutting plane abuts against the upper connecting bracket, and the first angle-adjusting inclined plane abuts against the lower connecting bracket, the inclination angle of the battery pack relative to the horizontal plane is equal to the first included angle; When the second abutting plane abuts against the upper connecting bracket, and the second angle-adjusting inclined surface abuts against the lower connecting bracket, the inclination angle of the battery pack relative to the horizontal plane is equal to the second included angle; When the third abutting plane abuts against the upper connecting bracket, and the third angle adjustment inclined surface abuts against the lower connecting bracket, the inclination angle of the battery pack relative to the horizontal plane is equal to the third included angle.

4. The battery pack bottom scraping test device according to any one of claims 1 to 3, characterized in that: The angle adjustment piece is arranged in a polygonal column shape; When the angle adjustment member is detached from between the upper connecting bracket and the lower connecting bracket, the battery pack can be adjusted to a horizontal state.

5. The battery pack bottom scraping test device according to claim 1, characterized in that: The lower connecting bracket is provided with a plurality of first gear slots, the fixing bracket is fixed in the first gear slot by a first fixing bolt, and the first fixing bolt can be switched among the plurality of first gear slots to adjust the height of the battery pack.

6. The battery pack bottom scraping test device according to claim 5, characterized in that: The plurality of first gear slots are arranged in parallel and at different heights; one end of the plurality of first gear slots is connected through a first connecting slot, and the first fixing bolt can be switched between the plurality of first gear slots along the first connecting slot to adjust the height of the battery pack; When the first fixing bolt fixes the fixing bracket in the first gear slot, a first locking piece is detachably provided on the first fixing bolt, one end of the first locking piece abuts against the first fixing bolt, and the other end of the first locking piece abuts against the side wall of the first connecting slot to lock the first fixing bolt.

7. The battery pack bottom scraping test device according to claim 1, characterized in that: The upper connecting bracket is provided with a plurality of second gear slots along its width direction, and the end of the connecting member is fixed in the second gear slot by a second fixing bolt; the second fixing bolt can be switched between the plurality of second gear slots to adjust the distance between the left fixing group and the right fixing group.

8. The battery pack bottom scraping test device according to claim 7, characterized in that: One ends of the plurality of second gear slots are connected through the second connecting slot, and the second fixing bolt can switch between the plurality of second gear slots along the second connecting slot; wherein a row of the second gear slots is respectively provided on both sides of the second connecting slot on the upper connecting bracket, and one ends of the two rows of the second gear slots are both connected through the second connecting slot, and the two rows of the gear slots on both sides of the second connecting slot are staggered; When the second fixing bolt fixes the end of the connecting member in one of the second gear slots, the second fixing bolt is also detachably provided with a second locking member, one end of the second locking member abuts against the second fixing bolt, and the other end of the second locking member abuts against the side wall of the second connecting slot to lock the second fixing bolt.

9. The battery pack bottom scraping test device according to claim 1, characterized in that: The bottom plate is provided with two parallel guide rails, and the installation position of the ball head assembly on the bottom plate can be adjusted by sliding along the guide rails; wherein the ball head assembly comprises a base, a plurality of pads and a ball head arranged in sequence from bottom to top, the base is located between the two guide rails, and the bolts can detachably fix the ball head assembly on the bottom plate; The plurality of pads include pads of various different thicknesses, and one or more of the plurality of pads are arranged between the base and the ball head; wherein the thickness of the pads include 1 mm, 2 mm, 4 mm, 8 mm and 16 mm.

10. A battery pack bottom scraping test method, applied to the battery pack bottom scraping test device according to any one of claims 1 to 9, characterized in that: The test method includes: Adjusting the connection position of the connecting member on the left fixing group left and right, and adjusting the connection position of the connecting member on the right fixing group left and right to adapt to the width of the battery pack to be tested; Fixing the battery pack to be tested between the fixing brackets of the left fixing group and the right fixing group; Adjust the installation height of the fixed bracket on the lower connecting bracket to adjust the height of the battery pack; and place the angle adjustment member between the upper connecting bracket and the lower connecting bracket to adjust the inclination angle of the battery pack to be tested; or disengage the angle adjustment member from between the upper connecting bracket and the lower connecting bracket to make the battery pack to be tested in a horizontal state; The trolley is moved toward the ball barrier module, and the battery pack to be tested is made to collide with the ball head assembly.

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