Battery pack test fixture and apparatus

Abstract

The utility model provides a kind of battery pack test tool and device, tool includes base, support block, connecting block;The base includes two base plates of horizontal interval arrangement, two base plates are symmetrically provided with multiple rows of first screw holes;The support block is equipped with second screw hole, third screw hole is equipped on the connecting block, support block is symmetrically arranged at the top of two base plates, connecting block is placed at the top of support block, three are fixed by bolt and first screw hole, second screw hole, third screw hole cooperation, form two symmetrical assemblies.The utility model adopts base, support block, connecting block detachable assembly mode, different support block can be replaced according to test object different, i.

Description

Technical Field

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

[0002] Electric vehicles encounter various complex operating conditions during operation. The design of the battery pack structure directly affects its overall safety performance; in particular, the vibration characteristics of the battery pack must be designed to match the vehicle's overall characteristics and are often used in its durability and lifespan evaluation. Battery packs generally require vibration testing. During vibration testing, the battery pack is fixed to a vibration testing fixture, ensuring that the fixture and battery pack do not resonate. Simultaneously, the vibration testing fixture must meet the strength and stiffness requirements during testing. Currently, there are various fixtures used for battery pack vibration testing, with different structures, making it difficult to intuitively correlate different fixtures with different battery pack models. This leads to the inability to determine whether the current fixture meets the vibration testing requirements of the current battery pack. Utility Model Content

[0003] The technical problem to be solved by this utility model is to design a combined vibration fixture that can be matched with battery packs of different models and sizes.

[0004] This utility model solves the above-mentioned technical problems through the following technical means: A battery pack testing fixture includes a base, a support block, and a connecting block. The base comprises two horizontally spaced base plates, each symmetrically equipped with multiple rows of first screw holes. The support block has second screw holes, and the connecting block has third screw holes. The support block is symmetrically positioned on top of the two base plates, and the connecting block is placed on top of the support block. The three components are fixed together by bolts engaging with the first, second, and third screw holes, forming two symmetrical components. This invention employs a detachable assembly method for the base, support block, and connecting block. Different support blocks can be replaced depending on the test object, allowing for one set of base and one set of connecting blocks to be equipped with multiple sets of designed support blocks. This significantly improves the utilization rate of the base and connecting blocks. The multiple sets of designed support blocks can be stacked for storage when not in use, occupying minimal space and facilitating movement.

[0005] Furthermore, the support block is a cuboid metal block.

[0006] Furthermore, the length, width, and height of the support block are 150mm*105mm*(50~130)mm respectively.

[0007] Furthermore, the support block is a cuboid metal block.

[0008] Furthermore, the support block is a solid metal block with a height of 120mm to 130mm, and has multiple rows of through-holes.

[0009] Furthermore, the support block has four independent, vertically connected hollow areas with a height of 105mm to 115mm; the four hollow areas form an X-shaped structure; the total planar area of ​​the hollow areas accounts for approximately 1 / 8 to 1 / 6 of the planar area of ​​the metal block; the support block has three rows of through second screw holes, located at the head, middle and tail of the X-shaped structure respectively.

[0010] Furthermore, the support block has a vertically penetrating H-shaped hollow area with a height of 95mm to 105mm; the total planar area of ​​the hollow area accounts for approximately 1 / 4 to 2 / 5 of the overall planar area; the support block has three rows of through second screw holes, located at the head, tail, and the metal body protruding towards the center of the hollow area from the belly.

[0011] Furthermore, the support block has three independent, vertically connected hollow areas with a height of 75mm to 95mm. The total area of ​​the hollow areas is approximately 1 / 6 to 1 / 5 of the overall plane area. The second screw holes are in two rows, located at both ends of the hollow areas.

[0012] Furthermore, the support block has two vertically connected and independent hollow areas with a height of 60mm to 75mm. The total area of ​​the hollow areas accounts for about 1 / 5 to 1 / 4 of the overall plane area of ​​the metal block. The second screw hole is in three rows, located at both ends of the support block and between the two hollow areas.

[0013] Furthermore, a vertically penetrating hollow area with a height of 50mm to 60mm is opened on the support block. The planar area of ​​the hollow area accounts for 1 / 3 to 1 / 4 of the overall planar area. The second screw hole is in two rows, located on opposite sides of the hollow area.

[0014] This utility model also provides a battery pack vibration device, including the above-mentioned tooling and vibration table, wherein the tooling is fixed on the vibration table.

[0015] The advantages of this utility model are: This utility model adopts a detachable assembly method for the base, support block, and connecting block. Different support blocks can be replaced according to different test objects, that is, one set of base and one set of connecting blocks are matched with multiple sets of designed support blocks, which greatly improves the utilization rate of the base and connecting blocks. The multiple sets of designed support blocks can be stacked and stored when not in use, occupying little space and making them easy to move.

[0016] By using different types of hollow designs and corresponding heights, support blocks of different qualities can be made to meet the testing requirements of battery packs of different sizes. This achieves a balance between the support block's quality, rigidity, structural stability, and the applicable battery pack, avoiding functional waste and reducing the difficulty of hoisting. Attached Figure Description

[0017] Figure 1 This is an exploded view of the tooling and battery pack assembly in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the assembled tooling in Embodiment 1 of this utility model; Figure 3 The diagram shows the structure of the six designs in Embodiment 1 of this utility model, where a is the first design, b is the second design, c is the third design, d is the fourth design, e is the fifth design, and f is the sixth design. Figure 4 This is a comparison table of the performance of the six groups of designs in vibration or impact tests in Embodiment 1 of this utility model.

[0018] 1-Base; 11-Substrate; 12-First screw hole; 2-Support block; 21-Second screw hole; 22-Hollowed-out area; 3-Connecting block; 31-Third screw hole; 4-Battery pack. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Example 1 This embodiment describes a battery pack testing fixture, such as... Figure 1 , Figure 2As shown, the fixture includes a base 1, a support block 2, and a connecting block 3. The base 1, used for fixing to a workbench (not shown in the diagram), consists of two identical rectangular base plates 11, placed horizontally side-by-side along their length. Multiple rows of first screw holes 12 are formed on each base plate 11. Some of the first screw holes 12 are used for bolting to the workbench, while others are used for bolting to the support block 2. The support block 2 is a cubic metal block with multiple rows of second screw holes 21 running vertically through it. Multiple support blocks 2 are bolted to the two base plates 11 of the base 1, symmetrically arranged. Then, a connecting block 3 is bolted to the top of the support blocks 2, forming a symmetrical left-right assembly. The connecting block 3 is a plate material thicker in the middle and slightly thinner at the edges, with a planar area approximately the same as that of the support block 2. The connecting block 3 has three rows of third screw holes 31: one row located in the thicker middle area for bolting to the battery pack 4, and two rows located in the thinner areas on either side for bolting to the support block 2 below. When fixing the base 1, support block 2, and connecting block 3, first fix the base on the worktable, then place the support block in the designated position on the base, and then place the connecting block 3 on top of the support block 2. Secure the connecting block 3 through the support block, base, and worktable using a long bolt, and then fix the battery pack 4 to the connecting block 3. The height difference between the slightly thinner areas on both sides and the slightly thicker area in the middle of the connecting block 3 provides operating space for the long bolt. After tightening the long bolt, its top should not be higher than the slightly thicker area in the middle of the connecting block 3, thus not affecting the fixation of the battery pack 4.

[0021] To accommodate vibration or impact tests of different battery packs 4, and considering energy conservation and consumption reduction in hoisting and other processes, this embodiment designs multiple sets of support blocks 2. Each set of support blocks 2 has a different mass and stiffness. By replacing different types of support blocks 2, the stiffness and mass of the vibration fixture can be increased or decreased, which can meet the vibration test requirements of battery packs 4 of different sizes and facilitate hoisting and other processes. In other words, a set of base 1 and a set of connecting blocks 2 are matched with multiple sets of designed support blocks 2, which can greatly improve the utilization rate of base 1 and connecting blocks 3. Unused support blocks 2 can be stacked, occupying little space and facilitating movement. In this embodiment, each set of support blocks 2 has the same structure and no less than 8 blocks. The length and width of the support blocks 2 in all sets are the same, which facilitates matching with base 1 and connecting blocks 3, but the height varies depending on the size of the hollow area. Generally, a larger hollow area and a lower height will result in greater stiffness. Therefore, the height design principle of this embodiment is that the height gradually decreases as the hollow area increases. The overall dimensions of the support block 2 are 150*105*(50~130 mm) in length, width and height.

[0022] like Figure 3 As shown, Figure 3In the diagram, a through f correspond to the support block structures of groups one through six below. It should be noted that the heights of the support blocks in each group are for illustrative purposes only and are not strictly proportional. The specific structures are as follows: The first group consists of solid metal blocks, 120mm to 130mm in height, with three rows of through-holes 21. The three rows of through-holes 21 are evenly arranged, with three holes in each row. The support blocks 2 in the first group are the heaviest and have the highest rigidity, making them suitable for vibration testing of all battery packs 4. However, due to their large weight, they require significant manpower for assembly and are more difficult to lift, so they are generally used for vibration or impact testing of ultra-large battery modules.

[0023] The second group consists of four vertically penetrating hollow areas 22, each 105mm to 115mm high, cut into a metal block. The four hollow areas 22 are independent of each other, but together they form an X shape, with the four corners of the X pointing towards the four corners of the metal block. The four hollow areas can be regular rectangular planes or irregular elongated planes stretched downwards from the top of the metal block. Figure 3 The hollowed-out plane has a serrated shape; the irregular serrations can disperse stress and improve the stability and rigidity of the structure. The total planar area of ​​the hollowed-out area 22 accounts for approximately 1 / 8 to 1 / 6 of the planar area of ​​the metal block. The second screw holes 21 are arranged in three rows, with three second screw holes 21 in each row, evenly distributed. The three rows of second screw holes 21 are located at both ends and the middle of the X-shaped hollowed-out area 22, respectively. The bolt areas of this group of support blocks 2 and connecting blocks 3 are cross-connected, improving the integrity and high rigidity of each bolt. Compared with the first group, the rigidity and weight of the second group are reduced, but the cross-shaped hollowed-out design can ensure the lateral and vertical rigidity of the support block, making it suitable for larger battery module structures.

[0024] The third group: An I-shaped hollow area 22, 95mm-105mm high, is designed on the metal block, occupying approximately 1 / 4-2 / 5 of the overall plane area. Three rows of second screw holes are designed, located at the front, back, and middle of the I-shaped hollow area 22. The front and back rows each have three second screw holes 21, while the middle row has two, located on the protruding metal body on the belly of the I-shaped hollow area 22. This design enhances the rigidity of the bolt area between the support block 2 and the connecting block 3, while maximizing the structural lightweight.

[0025] The fourth group consists of three vertically connected and independent hollow areas 22 on the metal block, with a height of 75mm to 95mm. All three hollow areas 22 are rectangular and arranged side-by-side, with their long sides parallel to the short sides of the metal block. The total area of ​​the hollow areas 22 is approximately 1 / 6 to 1 / 5 of the overall surface area. The second screw holes 21 are arranged in two rows of three, located at opposite ends of the hollow areas 22. This design ensures the rigidity of the support block's perimeter and central area while maximizing lightweight design and structural stability, making it widely applicable.

[0026] The fifth group consists of two vertically connected and independent hollow areas 22 on the metal block, with a height of 60mm to 75mm. The two hollow areas 22 are rectangular, arranged side-by-side, and can be the same or different sizes. The long side of the hollow area 22 is parallel to the long side of the metal block. The total planar area of ​​the hollow areas occupies approximately 1 / 5 to 1 / 4 of the overall planar area of ​​the metal block. Three rows of second screw holes are located on the outer sides of the two hollow areas 22 and between them, with three second screw holes in each row. This double-hollow structure ensures the overall rigidity of the support block's perimeter and center, while achieving good weight reduction and high stability.

[0027] The sixth group consists of a vertically penetrating hollow area 22, 50mm-60mm high, carved into the metal block. This hollow area 22 is relatively large, occupying approximately 1 / 3-1 / 4 of the overall planar area. It can be cylindrical or rectangular. Two rows of screw holes are located on opposite sides of the hollow area 22. This structure ensures the rigidity of the support block's perimeter, achieving good stability with a relatively light weight, making it suitable for small battery packs 4.

[0028] The six sets of support blocks 2 with open areas 22 all maintained their side facades without damaging the support blocks 2, ensuring the integrity of the outer structure and preventing deformation during operation. The battery pack 4 models corresponding to different proportions of the open areas 22 in each set of support blocks 2, and their performance during vibration or impact tests are as follows: Figure 4 As shown.

[0029] The mass of the six sets of support blocks 2 has been determined, and the optimal matching soft-pack battery module has also been determined. When vibration or stamping tests are required on a certain model of soft-pack battery module, it is only necessary to select the corresponding support block 2 and assemble it with the base 1 and connecting block 3. Generally, three support blocks 2 are fixed on each of the two plates of the base 1. When selecting high-quality, high-rigidity support blocks 2 to match low-quality, low-size soft-pack battery modules, the number of support blocks 2 can be appropriately reduced, only requiring symmetrical arrangement on the two plates of the base 1. The support blocks 2 provided in this embodiment are generally selected from multiple support blocks 2 of the same group for simultaneous use. Of course, support blocks 2 from different groups can be freely combined, with a high degree of freedom in combination, and can be adapted to different types of battery modules.

[0030] Example 2 This embodiment provides a battery pack vibration device, including the tooling and vibration table described in Embodiment 1, wherein the tooling is fixed to the vibration table by bolts.

[0031] Example 3 This embodiment provides a battery pack impact testing device, including the tooling and impact testing table described in Embodiment 1, wherein the tooling is fixed to the impact testing table by bolts.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery pack testing fixture, characterized in that, The system includes a base, a support block, and a connecting block. The base includes two horizontally spaced base plates, each with multiple rows of first screw holes symmetrically arranged. The support block has a second screw hole, and the connecting block has a third screw hole. The support block is symmetrically arranged on the top of the two base plates, and the connecting block is placed on top of the support block. The three components are fixed together by bolts that engage with the first, second, and third screw holes to form two symmetrical components.

2. The battery pack testing fixture according to claim 1, characterized in that, The support block is a rectangular metal block.

3. The battery pack testing fixture according to claim 2, characterized in that, The support block has a length, width, and height of 150mm, 105mm, and (50-130)mm, respectively.

4. The battery pack testing fixture according to claim 2 or 3, characterized in that, The support block is a solid metal block with a height of 120mm to 130mm, and has multiple rows of through-holes.

5. The battery pack testing fixture according to claim 2 or 3, characterized in that, The support block has four independent, vertically connected hollow areas with a height of 105mm to 115mm; the four hollow areas form an X-shaped structure; the total plane area of ​​the hollow areas accounts for 1 / 8 to 1 / 6 of the plane area of ​​the metal block; the support block has three rows of through second screw holes, located at the head, middle and tail of the support block along its length.

6. The battery pack testing fixture according to claim 2 or 3, characterized in that, The support block has a vertically penetrating H-shaped hollow area with a height of 95mm to 105mm; the total planar area of ​​the hollow area accounts for 1 / 4 to 2 / 5 of the overall planar area; the support block has three rows of through second screw holes, located at the head, tail, and the metal body protruding towards the center of the hollow area.

7. The battery pack testing fixture according to claim 2 or 3, characterized in that, The support block has three independent, vertically connected hollow areas with a height of 75mm to 95mm. The total area of ​​the hollow areas is approximately 1 / 6 to 1 / 5 of the overall plane area. The second screw holes are in two rows, located at both ends of the length of the support block.

8. The battery pack testing fixture according to claim 2 or 3, characterized in that, The support block has two vertically connected and independent hollow areas with a height of 60mm to 75mm. The total area of ​​the hollow areas accounts for about 1 / 5 to 1 / 4 of the overall plane area of ​​the metal block. The second screw hole is in three rows, located at both ends of the support block and between the two hollow areas.

9. The battery pack testing fixture according to claim 2 or 3, characterized in that, A through-hole area with a height of 50mm to 60mm is opened on the support block. The plane area of ​​the through-hole area accounts for 1 / 3 to 1 / 4 of the overall plane area. The second screw hole is in two rows, located on opposite sides of the through-hole area.

10. A battery pack testing device, characterized in that, It includes the tooling and vibration table as described in any one of claims 1 to 9; the tooling is fixed on the vibration table.

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