A kind of fixture for electric vehicle battery vibration experiment

Abstract

The application discloses a kind of electric vehicle battery vibration experiment clamps, including simulation automobile frame and battery package, simulation automobile frame is connected into rigid frame body by two transverse keels and two longitudinal keels, simulation automobile frame is connected with external test mechanism, the clamping and fixing mechanism for clamping and fixing battery package is arranged at the top of frame body, the installation form of battery package is simulated and installed on the body of car by simulation automobile frame simulation automobile real frame, the actual state of body vibration is simulated, the installation is consistent with frame body, battery package is fixed and constrained on clamping and fixing mechanism, support plate is connected with frame body, the constraint state of battery in battery package on the body of car is simulated, the actual state of battery vibration with body is simulated, the actual limiting state of top of battery package after installation is simulated by limiting top of battery package, ensure that test result is as close to actual driving condition as possible, obtain effective experimental results.

Description

Technical Field

[0001] This invention relates primarily to the field of automotive technology, specifically to a fixture for testing the vibration of electric vehicle batteries. Background Technology

[0002] Electric vehicles (EVs) are vehicles powered by an onboard power source, using an electric motor to drive the wheels, and meeting all road traffic and safety regulations. Due to their relatively smaller environmental impact compared to traditional vehicles, their prospects are widely viewed favorably; however, the current technology is still immature. The working principle of an electric vehicle is: battery → current → power regulator → electric motor → power transmission system → driving the vehicle. During vehicle operation, the impact of the road surface on the EV's wheels is transmitted to the EV's body. Vibration of the battery caused by the vehicle body can lead to battery failure. Therefore, vibration tests are necessary for the onboard battery to ensure that it meets design and practical requirements when installed in a vehicle.

[0003] According to the invention application number CN201811278581.X, a fixture for vibration testing of lithium-ion power battery packs includes a rectangular base plate fixed to a vibration table. The rectangular base plate is provided with matching threaded holes corresponding to the positions of the fixing screw holes on the vibration table surface. Support seats are provided at the four corners of the rectangular base plate. The support seats on the same side of the rectangular base plate are connected by a bearing plate, and the bearing plate is provided with arc-shaped holes.

[0004] The aforementioned clamp for the vibration test of lithium-ion power battery packs fixes the battery pack to the rectangular base plate of the vibration table with bolts, simulating the battery pack being installed in a bracket on a vehicle.

[0005] Simply fixing the battery pack to the rectangular base plate of the vibration table with bolts is insufficient because the rectangular base plate cannot be adjusted in position. Since battery packs vary in size across different vehicle models, the rectangular base plate's applicability is limited, making it unsuitable for various battery pack fixing fixtures. Furthermore, the aforementioned fixture for lithium-ion power battery pack vibration testing does not accurately simulate the battery pack's installation configuration on the vehicle body. The fixing and installation performance of the vibration testing fixture determines whether the experiment can be successfully conducted. Failing to simulate the battery's constraint state on the vehicle body and its actual vibration state with the vehicle body affects subsequent battery performance analysis and prevents the acquisition of effective experimental results. Summary of the Invention

[0006] This invention mainly provides a fixture for testing the vibration of electric vehicle batteries, in order to solve the technical problems mentioned in the background art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] A clamp for vibrating electric vehicle batteries includes a simulated car frame and a battery pack. The simulated car frame is a rigid frame body connected by two transverse keels and two longitudinal keels. Simulated car wheels are provided at the bottom of the frame body. The simulated car frame is connected to an external testing mechanism. A clamping and fixing mechanism for clamping the battery pack is provided at the top of the frame body.

[0009] Preferably, the battery pack consists of an upper end cover and a lower end cover, with a cavity for accommodating the battery module formed between the upper end cover and the lower end cover. A first fixing plate is integrally provided on the outer circumferential wall at the top of the upper end cover, and a second fixing plate is integrally provided on the outer circumferential wall at the bottom of the lower end cover. The first fixing plate and the second fixing plate are connected by a stop structure and are fixed together by a first bolt.

[0010] Preferably, the clamping and fixing mechanism includes a support plate, a clamping component is provided on the top of the support plate, the support plate and the vehicle frame structure are arranged in a cuboid shape, and bottom crossbeams are symmetrically arranged at the bottom of the support plate, the bottom crossbeams being parallel to the support plate.

[0011] Preferably, the support plate is located at the top of the vehicle frame, the outer wall of each bottom crossbeam is connected to the inner wall of the transverse keel of the vehicle frame, the bottom of the support plate is connected to the top of the transverse keel of the vehicle frame, a plurality of first fixing holes are evenly and continuously opened at the top of the transverse keel of the vehicle frame, and a plurality of second fixing holes corresponding to the first fixing holes are continuously opened at the top of the support plate near the long edge, and the first fixing holes and the second fixing holes are connected by second bolts.

[0012] Preferably, the clamping assembly includes clamping plates arranged in a symmetrical structure, the clamping plates are arranged in an inverted L-shape, four sliding blocks are evenly arranged at the bottom of each clamping plate, a positioning block is integrally fixedly connected to one end of each sliding block, and a third screw hole is formed through each positioning block, the third screw hole is built into a positioning rotation handle.

[0013] Preferably, each of the clamping plates has a fourth screw hole that is uniformly and through-hole for connection with the battery pack, and the battery pack is located between two of the clamping plates.

[0014] Preferably, the bottom of the lower end cover is connected to the top of the support plate, the bottom of the second fixing plate on the outer circumferential wall of the bottom of the lower end cover is connected to the top of the clamping plate, and the fixing screw holes on the second fixing plate correspond to the fourth screw holes.

[0015] Preferably, each sliding block on the support plate has a groove at its bottom, the groove is perpendicular to the clamping plate, the sliding block slides inside the groove, and each groove has a plurality of fifth bolt fixing holes that are evenly arranged inside it and connected to the third screw hole.

[0016] Preferably, three sets of limiting components are uniformly arranged outside the clamping assembly on the support plate for limiting the top of the battery pack. Each limiting component includes a limiting base plate, which is L-shaped. The bottom of the limiting base plate is fixed to the top of the support plate by bolts. The top of the limiting base plate is connected to a limiting upright by threads. The top of the limiting upright is connected to a top plate for limiting the top of the battery pack near the middle of the support plate. The limiting top plate is connected to the top of the upper end cover.

[0017] Preferably, the bottom of the simulated car wheels of the simulated car frame is connected to the external testing mechanism.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This application uses a simulated car frame to simulate the actual car frame and the actual state of vehicle body vibration. The battery pack is installed in a simulated form on the vehicle body, and is consistent with the frame during installation. The battery pack is fixed and constrained on the clamping and fixing mechanism, and the support plate is connected to the frame. This simulates the constraint state of the battery in the battery pack on the vehicle body and the actual state of the battery vibrating with the vehicle body. By limiting the top of the battery pack, the actual limiting state of the top of the battery pack after installation is simulated, ensuring that the test results are as close as possible to the actual driving situation and obtaining effective experimental results.

[0020] The clamping components of the support plate are position-adjustable, making it convenient to clamp various types of battery packs. It has a wide range of applications and strong applicability.

[0021] The simulated car frame is a rigid frame body connected by two transverse keels and two longitudinal keels, which ensures that the vibration energy of the vibration table is rigidly transmitted to the battery pack.

[0022] It is installed with bolts, making installation and disassembly convenient.

[0023] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a top view of the simulated car frame of the present invention;

[0025] Figure 2 This is an isometric view of the battery pack of the present invention;

[0026] Figure 3 This is an isometric view of the clamping and fixing mechanism of the present invention;

[0027] Figure 4 This is an isometric view of the clamping assembly of the present invention;

[0028] Figure 5 This is a schematic diagram of the bottom of the clamping plate of the present invention;

[0029] Figure 6 For the present invention Figure 4 Enlarged view of area A in the middle.

[0030] Figure Descriptions: 1. Simulated car frame; 11. Frame body; 111. First fixing hole; 12. Car wheel; 2. Battery pack; 21. Upper end cover; 211. First fixing plate; 212. Second fixing plate; 213. First bolt; 22. Lower end cover; 3. Clamping and fixing mechanism; 31. Support plate; 311. Bottom crossbeam; 312. Second fixing hole; 313. Second bolt; 4. Clamping plate; 41. Sliding block; 42. Positioning block; 421. Third screw hole; 422. Positioning rotating handle; 43. Fourth screw hole; 44. Slide groove; 441. Fifth bolt fixing hole; 51. Limiting bottom plate; 52. Limiting upright; 53. Limiting top plate. Detailed Implementation

[0031] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] Please refer to the appendix carefully. Figure 1-6As shown, a clamp for vibrating electric vehicle batteries includes a simulated car frame 1 and a battery pack 2. The simulated car frame 1 is a rigid frame body 11 connected by two transverse keels and two longitudinal keels. Simulated car wheels 12 are provided at the bottom of the frame body 11. The battery pack 2 consists of an upper end cover 21 and a lower end cover 22. A cavity for accommodating battery modules is formed between the upper end cover 21 and the lower end cover 22. A first fixing plate 211 is integrally provided on the outer circumferential wall of the top of the upper end cover 21, and a second fixing plate 212 is integrally provided on the outer circumferential wall of the bottom of the lower end cover 22. The first fixing plate 211 and the second fixing plate 212 are connected by a stop structure and fixed by a first bolt 213. The simulated car frame 1 is connected to an external testing mechanism. A clamping and fixing mechanism 3 for clamping the battery pack 2 is provided on the top of the frame body 11. The bottom of the simulated car wheels 12 of the simulated car frame 1 is connected to the external testing mechanism.

[0035] It should be noted that in this embodiment, the simulated car frame 1 simulates the actual car frame and the actual state of vehicle body vibration. The battery pack 2 is installed on the vehicle body in a simulated manner, and is consistent with the frame body 11 during installation. The battery pack 2 is fixedly constrained on the clamping and fixing mechanism 3, and the support plate 31 is connected to the frame body 11. This simulates the constraint state of the battery in the battery pack 2 on the vehicle body. The simulated car frame 1 is a rigid frame body 11 connected by two transverse keels and two longitudinal keels, which ensures that the vibration energy of the vibration table is rigidly transmitted to the battery pack 2, simulating the actual state of the battery vibrating with the vehicle body. This ensures that the test results are as close as possible to the actual driving situation and obtains effective experimental results.

[0036] Please refer to the appendix carefully. Figure 2-4As shown, the clamping and fixing mechanism 3 includes a support plate 31, with a clamping assembly on the top of the support plate 31. The support plate 31 and the frame body 11 are arranged in a cuboid structure. Bottom crossbeams 311 are symmetrically arranged at the bottom of the support plate 31, parallel to the support plate 31. The support plate 31 is located at the top of the frame body 11. The outer wall of each bottom crossbeam 311 connects to the inner wall of the transverse keel of the frame body 11. The bottom of the support plate 31 connects to the top of the transverse keel of the frame body 11. Several first fixing holes 111 are evenly and continuously opened through the top of the transverse keel of the frame body 11. Several second fixing holes 312 corresponding to the first fixing holes 111 are continuously opened through the top of the support plate 31 near its long edge. The first fixing holes 111 and the second fixing holes 312 are connected by second bolts 313. The clamping assembly includes clamping plates 4 arranged in a symmetrical structure, with the clamping plates 4 arranged in an inverted L-shape. Each clamping... Four sliding blocks 41 are evenly arranged at the bottom of plate 4. A positioning block 42 is integrally fixedly connected to one end of each sliding block 41. A third screw hole 421 is opened through each positioning block 42. A positioning rotating handle 422 is built into the third screw hole 421. A fourth screw hole 43 connected to the battery pack 2 is evenly opened through each clamping plate 4. The battery pack 2 is located between two clamping plates 4. The bottom of the lower end cover 22 is connected to the top of the support plate 31. The bottom of the second fixing plate 212 on the outer circumferential wall of the bottom of the lower end cover 22 is connected to the top of the clamping plate 4, and the fixing screw hole on the second fixing plate 212 corresponds to the fourth screw hole 43. A sliding groove 44 is opened at the bottom of each sliding block 41 on the support plate 31. The sliding groove 44 is perpendicular to the clamping plate 4. The sliding block 41 slides inside the sliding groove 44. Several fifth bolt fixing holes 441 connected to the third screw hole 421 are evenly arranged inside each sliding groove 44.

[0037] It should be noted that in this embodiment, the support plate 31 is located on the top of the vehicle frame 11, and the outer wall of each bottom crossbeam 311 is connected to the inner wall of the transverse keel of the vehicle frame 11, so that the support plate 31 is engaged with the top between the transverse keels of the vehicle frame 11 through the bottom crossbeam 311. The support plate 31 simulates the real state of the car floor. The support plate 31 is connected to the vehicle frame 11 by bolts, and it is easy to install and disassemble during testing.

[0038] Furthermore, the sliding block 41 at the bottom of the clamping plate 4 slides inside the sliding groove 44. The position of the clamping plate 4 can be easily adjusted by the sliding block 41 and the sliding groove 44, making it convenient to clamp various types of battery packs 2. It has a wide range of applications and strong applicability.

[0039] Furthermore, the clamping plate 4 is arranged in an inverted L-shape. One end of the clamping plate 4 is grounded to the bottom outer wall of the lower end cover 22 of the battery pack 2, so that the battery pack 2 is confined between the two clamping plates 4. The bottom of the second fixing plate 212 on the top outer circumferential wall of the lower end cover 22 is grounded to the top of the clamping plate 4 and fixed by bolts, so that the battery pack 2 is firmly clamped on the clamping plate 4, simulating the constraint state of the battery in the battery pack 2 on the vehicle body, and ensuring that the test results are as close as possible to the actual installation test situation.

[0040] Please refer to the appendix carefully. Figure 3 , 4 As shown in Figure 6, limiting components for limiting the top of the battery pack 2 are uniformly arranged outside the clamping assembly on the support plate 31. There are three sets of limiting components. Each limiting component includes a limiting base plate 51, which is L-shaped. The bottom of the limiting base plate 51 is fixed to the top of the support plate 31 by bolts. The top of the limiting base plate 51 is connected to a limiting rod 52 by threads. The top of the limiting rod 52 is connected to a top plate 53 for limiting the top of the battery pack 2 near the middle of the support plate 31. The limiting top plate 53 is connected to the top of the upper end cover 21.

[0041] It should be noted that in this embodiment, the top of the limiting base plate 51 is connected to the limiting rod 52 by a thread. The height of the limiting rod 52 can be adjusted by the thread, so that the limiting top plate 53 is locked on the top of the upper end cover 21. The limiting base plate 51, the limiting rod 52 and the limiting top plate 53 simulate the real limiting state of the top of the battery pack 2 after installation, so as to ensure that the test results are as close as possible to the actual driving situation and obtain effective experimental results.

[0042] The specific process of this invention is as follows:

[0043] Before installing the battery pack 2 onto the simulated car frame 1, a vibration test is required on the battery pack 2 using a vibration table to ensure that the batteries installed on the vehicle body meet the design requirements.

[0044] The support plate 31 is placed on the top of the frame body 11. The outer wall of each bottom crossbeam 311 is connected to the inner wall of the transverse keel of the frame body 11, so that the support plate 31 is locked between the transverse keels of the frame body 11 by the bottom crossbeam 311. The support plate 31 is connected to the frame body 11 by bolts. The battery pack 2 is placed on the support plate 31 between the clamping plates 4. The bottom of the lower end cover 22 of the battery pack 2 is connected to the top of the support plate 31. The position of the clamping plate 4 is adjusted by the sliding block 41 and the sliding groove 44. The bottom of the second fixing plate 212 on the outer circumferential wall of the bottom of the lower end cover 22 is connected to the top of the clamping plate 4 and fixed by bolts. The height of the limiting rod 52 is adjusted by the threaded connection so that the limiting top plate 53 is locked on the top of the upper end cover 21. After installation, the test is carried out.

[0045] The simulated car frame 1 simulates the actual car frame and the actual state of vehicle body vibration. The battery pack 2 is installed on the vehicle body in a simulated manner, maintaining consistency with the frame body 11 during installation. The battery pack 2 is fixedly constrained on the clamping mechanism 3, and the support plate 31 is connected to the frame body 11, simulating the constraint state of the battery in the battery pack 2 on the vehicle body. The simulated car frame 1 is a rigid frame body 11 connected by two transverse keels and two longitudinal keels, ensuring that the vibration energy of the vibration table is rigidly transmitted to the battery pack 2, simulating the actual state of the battery vibrating with the vehicle body. The clamping plate 4 is inverted. The L-shaped structure is designed so that one end of the clamping plate 4 is grounded to the bottom outer wall of the lower end cover 22 of the battery pack 2, thus confining the battery pack 2 between the two clamping plates 4. The bottom of the second fixing plate 212 on the top outer circumferential wall of the lower end cover 22 is grounded to the top of the clamping plate 4 and fixed by bolts, so that the battery pack 2 is firmly clamped on the clamping plate 4, simulating the constraint state of the battery in the battery pack 2 on the vehicle body. The limiting bottom plate 51, the limiting upright 52 and the limiting top plate 53 simulate the real limiting state of the top of the battery pack 2 after installation, ensuring that the test results are as close as possible to the actual driving situation and obtain effective experimental results.

[0046] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A fixture for electric vehicle battery vibration test, comprising a simulated vehicle frame (1) and a battery pack (2), characterized in that The simulated car frame (1) is a rigid frame body (11) formed by two transverse keels and two longitudinal keels. The bottom of the frame body (11) is provided with simulated car wheels (12). The simulated car frame (1) is connected to an external testing mechanism. The top of the frame body (11) is provided with a clamping and fixing mechanism (3) for clamping the battery pack (2). The battery pack (2) is composed of an upper end cover (21) and a lower end cover (22). A cavity for accommodating the battery module is formed between the upper end cover (21) and the lower end cover (22). A first fixing plate (211) is integrally provided on the outer circumferential wall of the top of the upper end cover (21), and a second fixing plate (212) is integrally provided on the outer circumferential wall of the bottom of the lower end cover (22). The first fixing plate (211) and the second fixing plate (212) are connected by a stop structure, and the first fixing plate (211) and the second fixing plate (212) are fixed together by a first bolt (213). The clamping and fixing mechanism (3) includes a support plate (31), a clamping component is provided on the top of the support plate (31), the support plate (31) and the frame body (11) are arranged in a cuboid structure, and a bottom crossbeam (311) is symmetrically arranged at the bottom of the support plate (31), the bottom crossbeam (311) is parallel to the support plate (31); The support plate (31) is located on the top of the frame body (11). The outer wall of each bottom crossbeam (311) is connected to the inner wall of the transverse keel of the frame body (11). The bottom of the support plate (31) is connected to the top of the transverse keel of the frame body (11). The top of the transverse keel of the frame body (11) is uniformly provided with a number of first fixing holes (111). The support plate (31) is provided with a number of second fixing holes (312) corresponding to the first fixing holes (111) near the top of the long edge. The first fixing holes (111) and the second fixing holes (312) are connected by second bolts (313).

2. The fixture for battery vibration test of an electric vehicle according to claim 1, wherein The clamping assembly includes clamping plates (4) arranged in a symmetrical structure. The clamping plates (4) are arranged in an inverted L-shape. Four sliding blocks (41) are evenly arranged at the bottom of each clamping plate (4). A positioning block (42) is integrally fixedly connected to one end of each sliding block (41). A third screw hole (421) is provided through each positioning block (42). A positioning rotating handle (422) is built into the third screw hole (421).

3. The fixture for battery vibration test of an electric vehicle according to claim 2, wherein Each of the clamping plates (4) has a fourth screw hole (43) that is uniformly opened through it and connected to the battery pack (2). The battery pack (2) is located between the two clamping plates (4).

4. The fixture for battery vibration test of an electric vehicle according to claim 1, wherein The bottom of the lower end cover (22) is connected to the top of the support plate (31), and the bottom of the second fixing plate (212) on the outer circumferential wall of the bottom of the lower end cover (22) is connected to the top of the clamping plate (4), and the fixing screw hole on the second fixing plate (212) corresponds to the fourth screw hole (43).

5. A clamp for vibrating electric vehicle batteries according to claim 2, characterized in that, Each sliding block (41) on the support plate (31) has a groove (44) at its bottom. The groove (44) is perpendicular to the clamping plate (4). The sliding block (41) slides inside the groove (44). Each groove (44) has several fifth bolt fixing holes (441) that are connected to the third screw hole (421) evenly arranged inside it.

6. The fixture for battery vibration test of an electric vehicle according to claim 2, wherein On the support plate (31), there are three sets of limiting components uniformly arranged outside the clamping assembly for limiting the top of the battery pack (2). Each limiting component includes a limiting base plate (51). The limiting base plate (51) is L-shaped. The bottom of the limiting base plate (51) is fixed to the top of the support plate (31) by bolts. The top of the limiting base plate (51) is connected to a limiting rod (52) by threads. The top of the limiting rod (52) is connected to a top plate (53) for limiting the top of the battery pack (2) near the middle of the support plate (31). The limiting top plate (53) is connected to the top of the upper end cover (21).

7. The fixture of claim 1, wherein The simulated car wheels (12) of the simulated car frame (1) are connected to the bottom of the external testing mechanism.

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