Battery pack test fixture and apparatus

Abstract

The utility model provides a kind of battery pack test tool, including base, connecting piece;The base includes two identical substrates, two substrates are horizontally arranged in parallel with interval, and multiple columns of first screw holes are opened on two substrates, the connecting piece is opened with second screw hole, the connecting piece is fixed on two substrates by bolt, and the assembly of left-right symmetry is formed.The utility model adopts the detachable assembly mode of base, connecting piece, can replace different connecting pieces according to different test objects, that is, realize a set of base, and the connecting piece of matched multiple groups design, greatly improve the utilization of base, and the connecting piece of multiple groups design can be stacked and stored when not in use, with small space occupation, convenient to move.

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 modular testing 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 and connectors. The base comprises two identical base plates arranged horizontally and parallel with a gap between them. Multiple rows of first screw holes are formed on both base plates. The connector has second screw holes and is fixed to the two base plates by bolts, forming a symmetrical assembly. This invention adopts a detachable assembly method for the base and connectors, allowing for the replacement of different connectors depending on the test object. This achieves one base with multiple sets of designed connectors, greatly improving the utilization rate of the base. The multiple sets of designed connectors can be stacked for storage when not in use, occupying little space and facilitating movement.

[0005] Furthermore, the connector is a rectangular plate with at least one row of through second screw holes on each of its opposite sides.

[0006] Furthermore, the connector has a through-hole area in the middle; at least one row of through-holes is provided on each of the two opposite sides of the through-hole area; the plane area of ​​the through-hole area is 1 / 3 to 1 / 2 of the plane area of ​​the connector.

[0007] Furthermore, the connector has three through-hole areas, each of which is elongated and arranged side by side with intervals, the middle one being larger and the two sides smaller; two rows of through-hole second screw holes are arranged along the length of the through-hole areas on opposite sides of the connector; the total area of ​​the three through-hole areas is 1 / 4 to 2 / 5 of the area of ​​the connector.

[0008] Furthermore, the connector has multiple through-hole areas, the total area of ​​which is 1 / 4 to 1 / 3 of the connector's surface area.

[0009] Furthermore, the hollowed-out area consists of five identical strip-shaped hollows arranged side by side at intervals, and the column line connecting the second screw holes is perpendicular to the long side of the strip-shaped hollow.

[0010] Furthermore, the connector has multiple hollow areas that run vertically through each other. These hollow areas are parallel strip-shaped hollows, with the long side of each strip parallel to the diagonal of the connector. The total area of ​​the multiple hollow areas is 1 / 5 to 1 / 4 of the total area of ​​the connector.

[0011] Furthermore, the connector has a long strip-shaped cutout running vertically through the top and bottom and two short strip-shaped cutouts. The two ends of the long strip-shaped cutout point to two opposite corners of the connector, and the two short strip-shaped cutouts are located on both sides of the long strip-shaped cutout and point to the other two opposite corners of the connector. The total area of ​​the cutout area accounts for 1 / 5 to 1 / 6 of the plane area of ​​the connector.

[0012] Furthermore, the connector includes two strip plates, each strip plate having at least one row of second screw holes, and the two strip plates are respectively fixed to two base plates of the base.

[0013] This utility model also provides a battery pack testing device, including the above-mentioned fixture and vibration table; the fixture is fixed on the vibration table.

[0014] The advantages of this utility model are: This utility model adopts a detachable assembly method for the base and connectors. Different connectors can be replaced according to different test objects, that is, one base with multiple sets of designed connectors, which greatly improves the utilization rate of the base. The multiple sets of designed connectors can be stacked and stored when not in use, occupying little space and making them easy to move.

[0015] By using different types of hollow designs and corresponding sizes, connectors of different qualities can meet the testing requirements of battery packs of different sizes. This achieves a balance between connector quality, rigidity, structural stability, and applicable battery packs, avoiding functional waste and reducing hoisting difficulty. Attached Figure Description

[0016] Figure 1This is an exploded view of the tooling and battery pack assembly in Embodiment 1 of this utility model, wherein the connecting part is Design 1; Figure 2 This is an exploded view of the tooling and battery pack assembly in Embodiment 1 of this utility model, wherein the connecting part is Design 7; Figure 3 This is a schematic diagram of the structure of the 7 groups of designs in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of the design 7 after assembly with the base in Embodiment 1 of this utility model; Figure 5 The dimensions of each of the seven sets of connectors and the dimensions of the battery pack used in Embodiment 1 of this utility model are shown.

[0017] 1-Base; 11-Baseboard; 12-First screw hole; 2-Connector; 21-Second screw hole; 22-Hollowed-out area; 3-Hanging ring; 4-Battery pack. Detailed Implementation

[0018] 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.

[0019] Example 1 This embodiment describes a battery pack testing fixture, such as... Figure 1 , Figure 2 As shown, the system includes a base 1 and a connector 2. The base 1 consists of two identical rectangular base plates 11, placed horizontally side-by-side along its length. Multiple rows of first screw holes 12 are formed on each base plate 11. Some of the first screw holes 12 are used to fix the base 1 to the workbench, while others are used to fix the base 1 to the connector 2. The connector 2 has multiple rows of second screw holes 21 extending vertically. The two base plates 11 are respectively fixed to the connector 2 with bolts, forming a symmetrical assembly. The battery pack 4 is fixed to the top of the connector with bolts. To accommodate vibration testing of different battery packs and considering lifting and other processes, this embodiment designs multiple sets of connectors 2. Each set of connectors 2 has a different mass and stiffness. That is, one set of base 1 is equipped with multiple sets of designed connectors 2. By changing different types of connectors 2, the stiffness and mass of the vibration fixture can be increased or decreased, which greatly improves the utilization rate of the base 1, meets the vibration testing requirements of battery packs of different sizes and masses, and facilitates lifting and other processes. Furthermore, the connector 2 is plate-shaped, making it easy to stack and store. like Figure 3As shown, seven different designs of connector 2 are displayed. Figure 1 The connector 2 of design 1 is used in the middle. Figure 2 The connector 2 of design 7 is used. For example... Figure 3 As shown, the specific structure of the 7-group connector 2 is as follows: Design 1: The connector is a square or rectangular substrate with dimensions of 2000*1200*65 mm. Its outline matches that of the base, and at least one row of through-holes is provided on each of its opposite sides. Design 1 adopts a solid structure, providing the highest rigidity and is suitable for vibration or shock testing of large pouch cells or other types of battery module structures.

[0020] Design 2: The connector is a square or rectangular substrate with dimensions of 1200*600*35 mm. Its outline matches that of the base, with a vertically penetrating hollow area in the center. This hollow area has a rectangular planar shape. At least one row of through-holes is provided on each of the two long sides of the hollow area. The planar area of ​​the hollow area is 1 / 3 to 1 / 2 of the planar area of ​​the connector. Design 2 adopts a large hollow structure, which has a lighter weight and better stability. The hollow area allows for the placement of sensors at the bottom of the battery pack for data sampling.

[0021] Design 3: The connector is a square or rectangular base plate with dimensions of 1400*900*45 mm. Its outline matches that of the base. The connector has three through-hole areas, each a long strip arranged side-by-side with a larger central area and smaller side areas. Two rows of through-holes are arranged along the length of the through-hole areas on opposite sides of the connector. The total area of ​​the three through-hole areas is 1 / 4 to 2 / 5 of the total area of ​​the connector. Design 3 uses a combination of large and small through-holes to ensure overall rigidity while achieving lightweight design and high stability. This structure is also convenient for transportation.

[0022] Design 4: The connector is a square or rectangular substrate with dimensions of 1400*900*45 mm. Its outline matches that of the base. The connector has multiple identical, vertically continuous hollow areas; each hollow area typically consists of five parallel strip-shaped hollows, with the line connecting the second screw holes perpendicular to the long side of the strip-shaped hollows; the total planar area of ​​the hollow areas is 1 / 4 to 1 / 3 of the total planar area of ​​the connector. Design 4 employs a multi-long, hollow strip structure and controls the hollow area ratio to achieve maximum weight reduction and structural stability, making it widely applicable and suitable for vibration testing of large battery packs.

[0023] Design 5: The connector is a square or rectangular substrate with dimensions of 1600*900*55 mm. Its outline matches that of the base. The connector has multiple through-hole areas, which are parallel strip-shaped cutouts. The long side of each strip is parallel to the diagonal of the connector. The total area of ​​the multiple cutout areas is 1 / 5 to 1 / 4 of the total area of ​​the connector. In this embodiment, three diagonal strip-shaped cutouts are arranged in parallel and spaced apart, with the middle one being longer and the two side ones shorter. Design 5 uses parallel diagonal strip-shaped cutouts, which have good lateral rigidity and maximize the lightweight of the structure.

[0024] Design 6: The connector is a square or rectangular substrate with dimensions of 1600*900*55 mm. Its outline matches that of the base. The connector has a long, vertically continuous cutout and two short, vertically continuous cutouts. The two ends of the long cutout point to opposite corners of the connector, and the two short cutouts are located on either side of the long cutout, pointing to the other two opposite corners of the connector, roughly forming an X shape. The total area of ​​the cutout region accounts for 1 / 5 to 1 / 6 of the connector's surface area. Design 6 uses a cross-cutting structure, which has good lateral and longitudinal stiffness, improving the overall integrity and high rigidity of the tooling, and is suitable for vibration testing of larger soft-pack or similar battery module structures.

[0025] Design 7: The connector includes two strip plates, each with dimensions (length x width x height) of 900 x 70 x 25 mm. Each strip plate has at least one row of second screw holes, such as... Figure 4 As shown, two strip plates are fixed in the center to the two base plates of the base. Lifting rings are fixed to both ends of each strip plate. Design 7 uses simple strip plates, and this structure is simple and easy to manufacture.

[0026] Designs 1-6 all involve screwing lifting rings 3 into the second screw holes at the four corners of the connector. Design 7 involves screwing lifting rings into the screw holes at both ends of the two strip plates, allowing for rapid transport. The number of lifting rings 3 is determined by the size of the battery pack, generally 2-6.

[0027] In designs 1 to 6, the hollowed-out areas of connector 2 do not damage the side facade of connector 2, ensuring the integrity of the connector's external structure and preventing deformation during operation. The battery pack models corresponding to different proportions of the hollowed-out areas 22 in each group of connector 2, and their performance in vibration or impact tests are shown below. Figure 5 As shown.

[0028] The quality of the seven sets of connectors 2 has been determined, and the optimal battery pack 4 has also been determined. When vibration or stamping tests are required on a certain type of soft-pack battery module, simply select the corresponding connector 2 and assemble it with the base 1. When assembling designs 1-6 with the base 1, cover the two substrates 11 with the entire connector 1 and center it, then fix them with bolts, and then place the battery pack 4 on top of the connector 2 and fix it with bolts. For design 7, place the two strip plates in the middle of the two substrates 11 and fix them with bolts, then place the battery pack on the two strip plates and fix the battery pack to the two strip plates with bolts. In this embodiment, the substrate specifications remain unchanged; only the connectors need to be replaced to adapt to different battery packs, resulting in high substrate utilization.

[0029] 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.

[0030] 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.

[0031] 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 assembly includes a base and a connector. The base consists of two identical base plates arranged horizontally and parallel to each other. Multiple rows of first screw holes are formed on the two base plates. The connector has second screw holes and is fixed to the two base plates by bolts, forming a symmetrical assembly.

2. The battery pack testing fixture according to claim 1, characterized in that, The connector is a rectangular plate with at least one row of through-holes on each of its left and right opposite sides.

3. The battery pack testing fixture according to claim 2, characterized in that, The connector has a through-hole area in the middle; at least one row of through-holes is provided on each of the two opposite sides of the through-hole area; the area of ​​the through-hole area is 1 / 3 to 1 / 2 of the area of ​​the connector.

4. The battery pack testing fixture according to claim 2, characterized in that, The connector has three through-hole areas, each of which is long and narrow, arranged side by side with intervals, the middle one being larger and the two sides smaller; two rows of through-holes are arranged along the length of the through-hole areas on opposite sides of the connector; the total area of ​​the three through-hole areas is 1 / 4 to 2 / 5 of the area of ​​the connector.

5. The battery pack testing fixture according to claim 2, characterized in that, The connector has multiple through-hole areas, and the total area of ​​the through-hole areas is 1 / 4 to 1 / 3 of the total area of ​​the connector.

6. The battery pack testing fixture according to claim 5, characterized in that, The hollowed-out area consists of five identical strip-shaped hollows arranged side by side at intervals, with the column line of the second screw hole perpendicular to the long side of the strip-shaped hollow.

7. The battery pack testing fixture according to claim 2, characterized in that, The connector has multiple open areas that run vertically through each other. These open areas are parallel strip-shaped cutouts, with the long side of each strip parallel to the diagonal of the connector. The total area of ​​the multiple open areas is 1 / 5 to 1 / 4 of the total area of ​​the connector.

8. The battery pack testing fixture according to claim 2, characterized in that, The connector has a long, vertically extending cutout and two short, vertically extending cutouts. The two ends of the long cutout point to two opposite corners of the connector, and the two short cutouts are located on both sides of the long cutout and point to the other two opposite corners of the connector. The total area of ​​the cutout area accounts for 1 / 5 to 1 / 6 of the plane area of ​​the connector.

9. The battery pack testing fixture according to claim 1, characterized in that, The connector includes two strip plates, each strip plate having at least one row of second screw holes, and the two strip plates are respectively fixed to two base plates of the base.

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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