A battery pack testing device

Abstract

This utility model discloses a battery pack testing device, comprising a fixed aluminum plate for positioning the battery pack and its frame; a clamping frame disposed on the fixed aluminum plate, with the battery pack and frame located within a limiting cavity formed by the clamping frame and the fixed aluminum plate; several fixed supports disposed on the surface of the fixed aluminum plate, each support having an upper pressure plate installed on it, the upper pressure plate contacting the upper surface of the battery pack frame for vertical limiting of the battery pack frame; and several pre-clamping structures disposed on the surface of the clamping frame. This utility model has a simple structure. Through the coordinated operation of the clamping frame, upper pressure plate, pre-clamping structures, and pressure plate structures, it achieves multi-dimensional and reliable fixation of the battery pack and its frame assembly in both vertical and horizontal directions, effectively simulating the constraint state during actual transportation and significantly improving the clamping stability and adaptability of the testing fixture.

Description

Technical Field

[0001] This utility model relates to the field of battery pack testing technology, specifically a battery pack testing device. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage technologies, the safety and reliability of power battery packs, as core components, are receiving increasing attention during transportation and use. Especially during the export transportation of battery packs, they often undergo various complex transportation environments, including sea and land transport, facing extremely harsh mechanical conditions such as vibration and impact. The UN38.3 certification standard, stipulated by the International Air Transport Association (IATA) and the United Nations' Recommendation on the Transport of Dangerous Goods, has become a mandatory requirement for the safe transportation of lithium batteries, particularly imposing strict regulations on the structural integrity and electrical safety of battery packs in tests such as vibration, acceleration shock, and high and low temperature cycling.

[0003] Currently, safety verification for battery pack transportation typically relies on vibration testing fixtures to simulate the dynamic load environment during actual transportation. However, existing vibration testing fixtures are mostly designed for conventional road transportation conditions and cannot realistically reproduce the long-period, complex-spectrum vibration conditions of maritime transport. Furthermore, when adapted to battery packs without lifting lugs, they suffer from problems such as unstable clamping, stress concentration, and complex fixing methods, affecting the accuracy of test results. In addition, the design of the testing fixture is disconnected from that of actual transportation equipment, meaning that even battery packs that pass the test may still experience risks such as structural loosening and component damage during actual transportation. Therefore, a battery pack testing device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a battery pack testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a battery pack testing device, comprising: Fixed aluminum plate, used to position the battery pack and battery pack frame; A clamping frame is mounted on a fixed aluminum plate, and the battery pack and battery pack frame are located in a limiting cavity formed by the clamping frame and the fixed aluminum plate. Several fixed brackets are set on the surface of the fixed aluminum plate. Each fixed bracket is equipped with an upper pressure plate. The upper pressure plate contacts the upper surface of the battery pack frame and is used to vertically limit the battery pack frame. Several pre-clamping structures are disposed on the surface of the clamping frame, contacting and limiting the surface of the battery pack frame, for pre-clamping and fixing the battery pack frame in the horizontal direction; and Two pressure plate structures are set on the surface of the fixed aluminum plate and located at both ends of the limiting cavity, respectively, to axially limit the battery pack and battery pack frame ends that protrude from the limiting cavity.

[0006] As a further embodiment of this utility model: the clamping frame is connected to the fixed aluminum plate through the base plate, and the base plate is connected to the fixed aluminum plate through bolts, which can better fix the clamping frame under the fixed aluminum plate. At the same time, the bolts can also facilitate subsequent disassembly and assembly.

[0007] As a further embodiment of this utility model: the surface of the clamping frame is fitted with multiple sets of protective foam that maintain contact with the battery pack, thereby protecting the surface and internal modules of the battery pack.

[0008] As a further embodiment of this utility model, tooling lifting rings are installed at the four corners of the upper surface of the fixed aluminum plate to facilitate the subsequent hoisting and transportation of tooling.

[0009] As a further embodiment of this utility model, the fixed aluminum plate is provided with several screw holes to facilitate subsequent connection and disassembly with the vibration table and other components.

[0010] As a further embodiment of this utility model: the pre-compression structure includes an outer plate connected to the surface of the compression frame, and an inner plate provided on the side of the outer plate adjacent to the battery pack frame. The inner plate and the outer plate are connected by a limiting pin. A first threaded rod is installed on the outer plate, and the end of the first threaded rod passes through the outer plate and keeps in contact with the surface of the inner plate. This structural design adjusts the position of the inner plate by rotating the first threaded rod on the outer plate: when the first threaded rod rotates forward, it drives the inner plate to move towards the battery pack, thereby compressing and fixing the battery pack frame; when it rotates in the reverse direction, the inner plate retracts and disengages from the battery pack frame, thereby releasing and disassembling the battery pack.

[0011] As a further embodiment of this utility model: two through holes are provided on the outer plate, the interior of the through holes is adapted to the limiting pin, and the through holes and the limiting pin are in sliding fit.

[0012] As a further embodiment of this utility model: the pressure plate structure includes two support blocks installed on a fixed aluminum plate. The upper end face of each of the two support blocks is equipped with an upper pressure block that keeps in contact with the battery pack frame. The end face of the two support blocks away from the battery pack frame is connected to a connecting plate. The connecting plate is provided with a pressing plate on the side near the battery pack frame. The pressing plate and the connecting plate are connected by a second threaded rod, thereby restricting the portion of the battery pack and battery pack frame that protrudes into the limiting space.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This application achieves multi-dimensional and reliable fixation of the battery pack and its frame assembly in both vertical and horizontal directions through the coordinated operation of the clamping frame, upper pressure plate, pre-clamping structure, and pressure plate structure. This effectively simulates the constraint state during actual transportation, significantly improving the clamping stability and adaptability of the test fixture. During battery pack vibration testing, this fixture can realistically reproduce the vibration environment of the transportation conditions specified in UN38.3 standard, thereby accurately verifying the stability and reliability of the battery pack structural design. Furthermore, the structural design of this test fixture can directly serve as the design basis for transportation fixtures, achieving consistency between the test fixture and the actual transportation fixation method, which helps improve the safety and standardization level of the product during transportation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the vibration testing fixture of this utility model; Figure 2 This is a schematic diagram of the battery pack and battery pack frame assembly of this utility model; Figure 3 This is a schematic diagram of the fixed bracket and upper pressure plate assembly of this utility model; Figure 4 This is a schematic diagram of the pre-compression structure of this utility model; Figure 5 This is a schematic diagram of the pressure plate structure of this utility model; Figure 6 This is a schematic diagram of the tooling lifting ring of this utility model; In the diagram: 1. Fixed aluminum plate; 2. Battery pack; 3. Battery pack frame; 4. Pressing frame; 5. Base plate; 6. Protective foam; 7. Fixed bracket; 8. Upper pressure plate; 9. Pre-pressing structure; 901. Outer plate; 902. Inner plate; 903. Limit pin; 904. First threaded rod; 10. Pressure plate structure; 1001. Support block; 1002. Upper pressure block; 1003. Connecting plate; 1004. Extrusion plate; 1005. Second threaded rod; 11. Tooling lifting ring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-6 In this embodiment of the present invention, a battery pack testing device includes: A fixed aluminum plate 1 is used to position the battery pack 2 and the battery pack frame 3. The clamping frame 4 is set on the fixed aluminum plate 1, and the battery pack 2 and battery pack frame 3 are located in the limiting cavity formed by the clamping frame 4 and the fixed aluminum plate 1. Several fixed brackets 7 are set on the surface of the fixed aluminum plate 1. Each fixed bracket 7 is equipped with an upper pressure plate 8. The upper pressure plate 8 contacts the upper surface of the battery pack frame 3 and is used to vertically limit the battery pack frame 3. Several pre-clamping structures 9 are disposed on the surface of the clamping frame 4, contacting and limiting the surface of the battery pack frame 3, for pre-clamping and fixing the battery pack frame 3 in the horizontal direction; and Two pressure plate structures 10 are disposed on the surface of the fixed aluminum plate 1 and are located at both ends of the limiting cavity, respectively, for axially limiting the ends of the battery pack 2 and the battery pack frame 3 that protrude from the limiting cavity.

[0017] Specifically, the fixed aluminum plate 1 is provided with multiple screw holes, which are used to connect the vibration table, the fixed bracket 7, the clamping frame 4 and the pressure plate structure 10, respectively, to facilitate subsequent replacement and assembly. The vibration table is located on the side of the fixed aluminum plate 1 away from the clamping frame 4 and the pressure plate structure 10 (not shown in the figure). The internal space of the limiting cavity is larger than the combination of the battery pack 2 and the battery pack frame 3, so that the whole assembly can be placed into the limiting cavity. The two ends of the assembly are respectively constrained by two pressure plate structures 10 to achieve lateral fixation; multiple fixed brackets 7 and the upper pressure plate 8 are located on the outside of the assembly, and the two are connected by bolts to form an L-shaped structure. The fixed brackets 7 are fixedly connected to the fixed aluminum plate 1 by bolts to provide support for the upper pressure plate 8. By rotating the bolts, the upper pressure plate 8 can be driven to move to one side of the fixed brackets 7, thereby applying a vertical clamping force from top to bottom to the upper end face of the battery pack frame 3 to ensure the stable fixation of the assembly in the vertical direction; the number of pre-compression structures 9 is not limited, but in this embodiment, it is preferred to be the same as the number of upper pressure plates 8 and correspond one-to-one. The pre-compression structures 9 use the compression frame 4 as a support point and apply pre-pressure to the battery pack frame 3 in the horizontal direction to further enhance its lateral positioning stability; through the synergistic effect of the compression frame 4, the upper pressure plate 8, the pre-compression structures 9 and the pressure plate structures 10, the battery pack assembly is reliably fixed in multiple directions.

[0018] Finally, the fixed aluminum plate 1 was installed on the vibration table for vibration testing to simulate the fixed working conditions during transportation, in order to verify the stability and reliability of the battery pack structure design. This fixture is not only used to test whether the battery pack meets the transportation requirements, but also to evaluate its own fixing effect, ensuring compliance with the test conditions for transportation vibration in UN38.3 standard.

[0019] Please see Figure 1 and Figure 6In one embodiment, preferably, the clamping frame 4 is connected to the fixed aluminum plate 1 via the base plate 5. The clamping frame 4 and the base plate 5 are welded together, and the base plate 5 is connected to the fixed aluminum plate 1 via bolts. This allows for better fixation of the clamping frame 4 to the fixed aluminum plate 1, and the bolts also facilitate subsequent disassembly and assembly. The surface of the clamping frame 4 is fitted with multiple sets of protective foam 6 that maintain contact with the battery pack 2, protecting the surface of the battery pack 2 and converting the hard contact between the two into a soft contact, thus preventing the battery pack 2 from deforming under pressure. Tooling lifting rings 11 are installed at the four corners of the upper surface of the fixed aluminum plate 1 to facilitate subsequent lifting and transportation of tooling.

[0020] Please see Figure 4 In one embodiment, preferably, the pre-compression structure 9 includes an outer plate 901 connected to the surface of the compression frame 4. An inner plate 902 is provided on the side of the outer plate 901 adjacent to the battery pack frame 3. The inner plate 902 and the outer plate 901 are connected by a limiting pin 903. Two through holes are provided on the outer plate 901. The interior of the through holes is adapted to the limiting pin 903. The through holes and the limiting pin 903 are in sliding fit. A first threaded rod 904 is installed on the outer plate 901. The end of the first threaded rod 904 passes through the outer plate 901 and keeps in contact with the surface of the inner plate 902. This structure design adjusts the position of the inner plate 902 by rotating the first threaded rod 904 on the outer plate 901: when the first threaded rod 904 rotates forward, it drives the inner plate 902 to move towards the battery pack 2, thereby compressing and fixing the battery pack frame 3; when it rotates in the reverse direction, the inner plate 902 retracts and disengages from the battery pack frame 3, thereby releasing and disassembling the battery pack 2.

[0021] Please see Figure 5 In one embodiment, preferably, the pressure plate structure 10 includes two support blocks 1001 mounted on the fixed aluminum plate 1. Each of the two support blocks 1001 has an upper pressure block 1002 mounted on its upper end surface to maintain contact with the battery pack frame 3. Both support blocks 1001 are connected to the fixed aluminum plate 1 by bolts, and both upper pressure blocks 1002 are connected to the two support blocks 1001 by bolts respectively. Furthermore, the end faces of the two support blocks 1001 away from the battery pack frame 3 are connected to the connecting plate 1003. The connecting plate 1003 is provided with a pressing plate 1004 on the side near the battery pack frame 3. The pressing plate 1004 and the connecting plate 1003 are connected by a second threaded rod 1005, thereby restricting the portion of the battery pack 2 and the battery pack frame 3 that protrudes into the limiting space. The number of second threaded rods 1005 is not limited. In this embodiment, it is preferred that there are two second threaded rods 1005. Both second threaded rods 1005 are threadedly connected to the connecting plate 1003, and the ends of both second threaded rods 1005 are rotatably connected to the pressing plate 1004. In this way, the pressing plate 1004 will not rotate along with the second threaded rods 1005 during rotation.

[0022] The working principle and usage process of this utility model are as follows: First, the battery pack 2 and its battery pack frame 3 are placed at the designated position on the fixed aluminum plate 1. Then, the base plate 5, which is connected to the clamping frame 4, is fixed to the fixed aluminum plate 1 with bolts, so that the clamping frame 4 clamps the battery pack 2 vertically from top to bottom, while also providing protection. Next, the upper pressure plate 8 is connected to the fixed bracket 7, and the lower surface of the upper pressure plate 8 limits and constrains the upper surface of the battery pack frame 3 below it. Then, the first threaded rod 904 is rotated, which drives the inner plate 902 to move towards the battery pack frame 3, thereby achieving horizontal alignment of its side. The process involves pressing and fixing the battery pack frame 3. Then, the support block 1001 is installed and fixed onto the fixed aluminum plate 1, with the upper pressure block 1002 connected to it pressing against the upper surface of the battery pack frame 3. Simultaneously, the second threaded rod 1005 is rotated, driving the pressing plate 1004 to move inward, making its surface contact the side of the battery pack frame 3, further applying horizontal pressure to enhance the fixing effect. Through these steps, the battery pack 2 and battery pack frame 3 are reliably fixed in multiple directions. Finally, the entire fixture is installed on a vibration table for vibration testing to simulate transportation conditions and verify the stability and safety of the battery pack structure.

[0023] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0024] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A battery pack testing device, characterized by, include: Fixed aluminum plate, used to position the battery pack and battery pack frame; A clamping frame is mounted on a fixed aluminum plate, and the battery pack and battery pack frame are located in a limiting cavity formed by the clamping frame and the fixed aluminum plate. Several fixed brackets are set on the surface of the fixed aluminum plate. Each fixed bracket is equipped with an upper pressure plate. The upper pressure plate contacts the upper surface of the battery pack frame and is used to vertically limit the battery pack frame. Several pre-clamping structures are disposed on the surface of the clamping frame, contacting and limiting the surface of the battery pack frame, for pre-clamping and fixing the battery pack frame in the horizontal direction; and Two pressure plate structures are set on the surface of the fixed aluminum plate and located at both ends of the limiting cavity, respectively, to axially limit the battery pack and battery pack frame ends that protrude from the limiting cavity.

2. The battery pack testing device of claim 1, wherein, The clamping frame is connected to the fixed aluminum plate via a base plate, and the base plate is connected to the fixed aluminum plate via bolts.

3. The battery pack testing device of claim 1, wherein, The surface of the clamping frame is fitted with multiple sets of protective foam that maintain contact with the battery pack.

4. The battery pack testing apparatus of claim 1, wherein, Tooling lifting rings are installed at the four corners of the upper surface of the fixed aluminum plate.

5. The battery pack testing apparatus of claim 1, wherein, The fixed aluminum plate has several screw holes.

6. The battery pack testing apparatus of claim 1, wherein, The pre-compression structure includes an outer plate connected to the surface of the compression frame, an inner plate on the side of the outer plate adjacent to the battery pack frame, the inner plate and the outer plate being connected by a limiting pin, and a first threaded rod installed on the outer plate, the end of the first threaded rod passing through the outer plate and maintaining contact with the surface of the inner plate.

7. The battery pack testing device of claim 6, wherein, Two through holes are provided on the outer plate. The interior of the through holes is adapted to the limiting pin, and the through holes and the limiting pin are in sliding fit.

8. The battery pack testing device of claim 1, wherein, The pressure plate structure includes two support blocks mounted on a fixed aluminum plate. The upper end face of each of the two support blocks is equipped with an upper pressure block that keeps in contact with the battery pack frame. The end face of the two support blocks away from the battery pack frame is connected to a connecting plate. The connecting plate has a pressing plate on the side near the battery pack frame. The pressing plate and the connecting plate are connected by a second threaded rod.

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