New energy automobile power battery pack stiffening beam anti-collision performance detection mechanism

Abstract

The utility model relates to the technical field of detection tools, and discloses a new energy automobile power battery pack stiffening beam anti-collision performance detection mechanism which comprises a rack, a tension meter is arranged on an upper cross beam of the rack, a clamping jaw is arranged on each of the tension meter and a bottom plate of the rack, and the two clamping jaws clamp the two ends of an anti-collision beam; a transverse notch, a vertical notch and an inclined notch are respectively formed in a clamping block of the clamping jaw, a strain gauge is pasted on the anti-collision beam, and the strain gauge is connected with a Wheatstone bridge circuit board; the Wheatstone bridge circuit board is installed on the front face of the rack and covered with the protective cover. The Wheatstone bridge circuit board is electrically connected with the voltmeter, and the voltmeter is installed on the rack; an impact structure facing the anti-collision beam is installed on the machine frame. According to the utility model, anti-collision simulation tests of different directions and inclination angles are carried out on the anti-collision beam, the flexibility of the detection mechanism is increased, and the test effect of the anti-collision beam of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, specifically a testing mechanism for the anti-collision performance of the reinforcing beam of a new energy vehicle power battery pack. Background Technology

[0002] The battery pack is the core component for energy storage in electric vehicles, containing a large number of flammable and explosive battery cells. In the event of a collision, the crash beam, as the first line of defense for the battery pack, effectively absorbs and disperses collision energy, reducing the direct impact on the battery pack. If the crash beam has quality problems or has not undergone rigorous testing, it may fail to provide adequate protection in a collision, leading to battery pack damage and potentially causing serious safety accidents such as short circuits, fires, or even explosions. Existing tensile testers measure the tensile strength and elongation at break of the reinforced beam material through tensile deformation testing; however, impact deformation requires additional instruments for detection, making crash testing of reinforced beams cumbersome.

[0003] The relevant reference CN116124610A discloses a bending resistance testing mechanism for automotive anti-collision beams, including a gantry frame and a positioning base plate fixed between the gantry frame. The anti-collision beam to be tested is fixedly placed in the positioning groove of the positioning base plate. The impact test block falls to carry out the impact. However, the direction of the battery pack anti-collision beam cannot be changed in the positioning groove, and the side of the battery pack anti-collision beam cannot be tested for anti-collision. The anti-collision test effect of the battery pack anti-collision beam is limited. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a new energy vehicle power battery pack reinforcement beam anti-collision performance testing mechanism that conducts anti-collision simulation tests on anti-collision beams in different directions and tilt angles, increases the flexibility of the testing mechanism, and improves the test effect of battery pack anti-collision beams.

[0005] To address the aforementioned technical issues, this utility model provides a collision resistance performance testing mechanism for the reinforcing beam of a new energy vehicle power battery pack. The mechanism includes a frame, a tension gauge mounted on the upper crossbeam of the frame, and a gripper on both the tension gauge and the base plate of the frame. The two grippers clamp the two ends of the anti-collision beam. The grippers have horizontal, vertical, and oblique slots on their clamping blocks. Strain gauges are attached to the anti-collision beam and connected to a Wheatstone bridge circuit board. The Wheatstone bridge circuit board is mounted on the front of the frame and covered by a protective cover. The Wheatstone bridge circuit board is electrically connected to a voltmeter, which is mounted on the frame. An impact structure facing the anti-collision beam is installed on the frame.

[0006] By adopting the above technical solution, horizontal, vertical, and oblique slots are set on the clamping block. The strain gauges on the anti-collision beam are connected to the voltmeter via a Wheatstone bridge circuit board. By testing the anti-collision beam clamped by the horizontal, vertical, and oblique slots, anti-collision simulation tests are conducted in different directions and tilt angles. This increases the flexibility of the testing mechanism and improves the test effect of the battery pack anti-collision beam.

[0007] Preferably, the impact structure includes a cylinder, and an impact seat is installed at the output end of the cylinder; an mounting plate is provided on the impact seat, and an impact block is provided on the mounting plate, with the impact block facing the anti-collision beam.

[0008] By adopting the above technical solution, the impact block is mounted on the impact seat at the output end of the cylinder via a mounting plate, and the impact block is driven by the cylinder. The structure is simple, the impact force is controllable, and the operation is convenient.

[0009] Preferably, the cylinder is mounted on the frame via a mounting block.

[0010] By adopting the above technical solution, the mounting block provides a stable support foundation for the cylinder, preventing the risk of the cylinder accidentally falling off during operation and ensuring the safe operation of the testing mechanism.

[0011] Preferably, the impact block is square.

[0012] By adopting the above technical solution, many impact scenarios in practical work involve objects with flat surfaces or sharp edges, such as components in vehicle collisions. Using block impact can more realistically simulate these actual scenarios, allowing for the study of the failure modes and energy absorption capacity of the tested object under complex stress states.

[0013] Preferably, the mounting plate is provided with pin holes, and the impact block is also provided with pin holes. The mounting plate and the impact block are connected by pin shafts.

[0014] By adopting the above technical solution, the mounting plate and the impact block are connected by a pin, which is stable. When it is necessary to replace the impact block with one of different specifications or materials, simply pull out the pin, replace it with a new impact block and insert the pin. This is very convenient, greatly improves testing efficiency and reduces maintenance costs.

[0015] Preferably, a wire groove is provided on one side of the protective cover, and the wires on the strain gauge pass through the wire groove.

[0016] By adopting the above technical solution, the wires on the Wheatstone bridge circuit board are routed through wire channels, making the wiring neater and more orderly.

[0017] Preferably, the protective cover is provided with mounting feet, which are mounted on the front of the frame by fasteners.

[0018] By adopting the above technical solution, the mounting feet make it easy to install and remove the protective cover, thereby improving the maintenance efficiency of the Wheatstone bridge circuit board.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model has horizontal, vertical and oblique slots on the clamping block. The strain gauges on the anti-collision beam are connected to the voltmeter via a Wheatstone bridge circuit board. By testing the anti-collision beam clamped by the horizontal, vertical and oblique slots, anti-collision simulation tests are conducted in different directions and tilt angles, which increases the flexibility of the testing mechanism and improves the test effect of the battery pack anti-collision beam.

[0021] 2. The impact block of this utility model is mounted on the impact seat at the output end of the cylinder by a mounting plate, and the impact block is driven by the cylinder. The structure is simple, the impact force is controllable, and the operation is convenient.

[0022] 3. The mounting plate and the impact block of this utility model are connected by a pin, which makes the connection stable. When it is necessary to replace the impact block with one of different specifications or materials, simply pull out the pin, replace it with a new impact block and insert the pin. This is very convenient, greatly improves testing efficiency and reduces maintenance costs. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present utility model;

[0024] Figure 2 This is a structural diagram of the gripper of this utility model;

[0025] Figure 3 This is a schematic diagram of the clamping block of this utility model;

[0026] Figure 4 This is a diagram of the impact structure of this utility model.

[0027] Drawing numbers: 1. Frame, 2. Force gauge, 3. Gripper, 4. Anti-collision beam, 5. Clamping block, 6. Horizontal slot, 7. Vertical slot, 8. Angled slot, 9. Strain gauge, 10. Wheatstone bridge circuit board, 11. Protective cover, 12. Voltmeter, 13. Impact structure, 14. Cylinder, 15. Impact seat, 16. Mounting plate, 17. Impact block, 18. Pin, 19. Wire groove, 20. Mounting foot, 21. Mounting block, 22. Shaft, 23. Clamping bolt. Detailed Implementation

[0028] like Figure 1 As shown, the collision resistance testing mechanism for the reinforcing beam of a new energy vehicle power battery pack includes a frame 1. A tension gauge 2 is installed on the upper crossbeam of the frame 1, and a gripper 3 is installed on both the tension gauge 2 and the base plate of the frame 1. The two grippers 3 clamp the two ends of the anti-collision beam 4. Figure 2As shown, the top surface of the clamping block 5 of the gripper 3 fits against the top surface of the clamping block cavity. The shaft 22 on the side of the clamping block 5 passes through the shaft hole in the side wall of the clamping block cavity. The side wall of the clamping block cavity is threaded with a clamping bolt 23. Tightening the clamping bolt 23 will bring the two clamping blocks 5 closer together and clamp the clamping blocks 5. Loosening the clamping bolt 23 and moving the clamping blocks 5 to both sides will release the clamping blocks 5.

[0029] like Figure 3 As shown, the clamping blocks 5 of the gripper 3 are respectively provided with horizontal slots 6, vertical slots 7, and oblique slots 8. Strain gauges 9 are attached to the anti-collision beam 4, and the strain gauges 9 are connected to a Wheatstone bridge circuit board 10. The Wheatstone bridge circuit board 10 is mounted on the front of the frame 1 and covered by a protective cover 11. The Wheatstone bridge circuit board 10 is electrically connected to a voltmeter 12, which is mounted on the frame 1. An impact structure 13 facing the anti-collision beam 4 is installed on the frame 1. This application provides horizontal slots 6, vertical slots 7, and oblique slots 8 on the clamping blocks 5. The strain gauges 9 on the anti-collision beam 4 are connected to the voltmeter 12 via the Wheatstone bridge circuit board 10. By testing the anti-collision beam 4 held by the horizontal slots 6, vertical slots 7, and oblique slots 8, anti-collision simulation tests are conducted in different directions and tilt angles, increasing the flexibility of the testing mechanism and improving the test effect of the battery pack anti-collision beam 4.

[0030] A wire channel 19 is provided on one side of the protective cover 11, through which the wires on the strain gauge 9 pass. The wires on the Wheatstone bridge circuit board 10 also pass through the wire channel 19, making the wiring neater and more orderly.

[0031] The protective cover 11 is provided with mounting feet 20, which are mounted on the front of the frame 1 by fasteners. The mounting feet 20 make it easy to install and remove the protective cover 11, improving the maintenance efficiency of the Wheatstone bridge circuit board 10.

[0032] like Figure 4 As shown, the impact structure 13 includes a cylinder 14, with an impact seat 15 mounted on the output end of the cylinder 14. A mounting plate 16 is provided on the impact seat 15, and an impact block 17 is mounted on the mounting plate 16, facing the anti-collision beam 4. The impact block 17 is mounted on the impact seat 15 at the output end of the cylinder 14 via the mounting plate 16, and is driven by the cylinder 14. The structure is simple, the impact force is controllable, and the operation is convenient.

[0033] The cylinder 14 is mounted on the frame 1 via the mounting block 21. The mounting block 21 provides a stable support base for the cylinder 14, preventing the risk of the cylinder accidentally falling off during operation and ensuring the safe operation of the testing mechanism.

[0034] Impact block 17 is square. In real-world applications, many impact scenarios involve objects with flat surfaces or sharp edges, such as components in vehicle collisions. Using a square impact block can more realistically simulate these scenarios, allowing for the study of the failure modes and energy absorption capabilities of the tested object under complex stress states.

[0035] The mounting plate 16 has pin holes, and the impact block 17 also has pin holes. The mounting plate 16 and the impact block 17 are connected by a pin 18. The connection between the mounting plate 16 and the impact block 17 using the pin 18 is secure. When it is necessary to replace the impact block 17 with one of different specifications or materials, simply pull out the pin 18, replace it with the new impact block 17, and insert the pin 18. This is very convenient, greatly improves testing efficiency, and reduces maintenance costs.

[0036] During operation, strain gauges 9 are attached to the anti-collision beam 4 to be tested.

[0037] The anti-collision beam 4 is placed in the horizontal slot 6 and clamped with the jaws 3. The jaws 3 are pulled upward to apply tension to the anti-collision beam 4 until it breaks or reaches the predetermined maximum tensile force value, and the tensile strength is tested. The anti-collision beam 4 to be tested is still clamped in the horizontal slot 6. The cylinder 14 is activated, and the impact block 17 impacts the anti-collision beam 4. The voltage change value of the strain gauge 9 is read. Based on the strain data collected by the strain gauge 9 and the observed deformation and damage of the anti-collision beam 4, the impact resistance performance of the front of the anti-collision beam 4 is analyzed. The anti-collision beam 4 is placed in the vertical slot 7 and clamped with the jaws 3. The jaws 3 are pulled upward to apply tension to the anti-collision beam 4 until it breaks or reaches the predetermined maximum tensile force value, and the tensile strength is tested. The anti-collision beam 4 to be tested is still clamped in the vertical slot 7. The cylinder 14 is activated, and the impact block 17 impacts the anti-collision beam 4. The voltage change value of the strain gauge 9 is read. Based on the strain data collected by the strain gauge 9 and the observed deformation and damage of the anti-collision beam 4, the impact resistance performance of the side of the anti-collision beam 4 is analyzed. The anti-collision beam 4 is placed into the inclined slot 8 and clamped with the jaws 3. The jaws 3 are pulled upward to apply tension to the anti-collision beam 4 until it breaks or reaches the predetermined maximum tensile force value, and the tensile strength is tested. The anti-collision beam 4 to be tested is still clamped in the inclined slot 8, the cylinder 14 is activated, and the impact block 17 impacts the anti-collision beam 4. The voltage change value of the strain gauge 9 is read. Based on the strain data collected by the strain gauge 9 and the observed deformation and damage of the anti-collision beam 4, the impact resistance performance of the anti-collision beam 4 under inclined force is analyzed.

[0038] In practical use, the crash beam 4 may be subjected to tensile and impact forces from different directions. By conducting tests in three directions—lateral, vertical, and diagonal—the complex stress conditions that the crash beam 4 may encounter in actual use were simulated, making the test results closer to real-world application scenarios. The strain gauge 9 can accurately reflect the strain changes of the crash beam 4 during tension and impact in real time. By reading the voltmeter 12, operators can intuitively understand the stress situation of the crash beam 4, providing crucial data for analyzing its stress distribution and deformation patterns. Simultaneously, observing the deformation and damage of the crash beam 4 provides a direct understanding of its impact resistance. Combining these two methods allows for a more in-depth and comprehensive analysis of the crash beam 4's impact resistance performance in different directions, providing targeted suggestions for product improvement and optimization.

[0039] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A collision resistance testing mechanism for a reinforcing beam of a power battery pack for new energy vehicles, comprising a frame (1), a tension gauge (2) mounted on the upper crossbeam of the frame (1), and a clamp (3) mounted on the tension gauge (2) and the base plate of the frame (1), the two clamps (3) clamping the two ends of the anti-collision beam (4); characterized in that: The clamping blocks (5) of the gripper (3) are respectively provided with horizontal slots (6), vertical slots (7) and oblique slots (8). Strain gauges (9) are attached to the anti-collision beam (4). The strain gauges (9) are connected to the Wheatstone bridge circuit board (10). The Wheatstone bridge circuit board (10) is installed on the front of the frame (1) and covered by a protective cover (11). The Wheatstone bridge circuit board (10) is electrically connected to the voltmeter (12). The voltmeter (12) is installed on the frame (1). The impact structure (13) facing the anti-collision beam (4) is installed on the frame (1).

2. The new energy vehicle power battery pack reinforcing beam anti-collision performance detection mechanism according to claim 1, characterized in that: The impact structure (13) includes a cylinder (14), an impact seat (15) is installed at the output end of the cylinder (14), an mounting plate (16) is provided on the impact seat (15), an impact block (17) is provided on the mounting plate (16), and the impact block (17) faces the anti-collision beam (4).

3. The new energy vehicle power battery pack reinforcing beam anti-collision performance detection mechanism according to claim 2, characterized in that: The cylinder (14) is mounted on the frame (1) via a mounting block (21).

4. The new energy vehicle power battery pack reinforcing beam anti-collision performance detection mechanism according to claim 2, characterized in that: The impact block (17) is square.

5. The new energy vehicle power battery pack reinforcing beam anti-collision performance detection mechanism according to claim 4, characterized in that: The mounting plate (16) is provided with pin holes, and the impact block (17) is also provided with pin holes. The mounting plate (16) and the impact block (17) are connected by a pin shaft (18).

6. The new energy vehicle power battery pack reinforcing beam anti-collision performance detection mechanism according to claim 1, characterized in that: The protective cover (11) has a wire groove (19) on one side, and the wires on the strain gauge (9) pass through the wire groove (19).

7. The new energy vehicle power battery pack reinforcing beam anti-collision performance detection mechanism according to claim 6, characterized in that: The protective cover (11) is provided with mounting feet (20), which are mounted on the front of the frame (1) by fasteners.

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