Battery high-voltage box vibration test structure

Abstract

A battery high-pressure box vibration test structure relates to the field of new energy automobile battery high-pressure box test, and is used for solving the problem that the existing vibration table fixing tool plate is inconvenient to assemble, disassemble and move during battery high-pressure box test. The battery high-pressure box vibration test structure comprises a vibration table, a high-pressure box, a square tool plate and a threaded fastener. The high-pressure box is arranged on the vibration table and is in the shape of a cuboid. Two vibration mounting plates are respectively formed on the two side walls of the high-pressure box along the length direction of the high-pressure box. The two vibration mounting plates on the same side of the high-pressure box are distributed at intervals. The bottom wall of the vibration mounting plate is on the same plane as the bottom wall of the high-pressure box. The vibration mounting plate is fixedly connected with the high-pressure box. The vibration mounting plate is provided with a mounting hole. Four square tool plates are provided. The four square tool plates are respectively and correspondingly arranged with the four vibration mounting plates. The square tool plate is provided with a threaded hole in the middle. The threaded hole is provided with an internal thread. The threaded hole on the square tool plate is in communication with the mounting hole.

Description

Technical Field

[0001] This application relates to the field of high-voltage box testing for new energy vehicle batteries, and in particular to a vibration testing structure for a high-voltage box for batteries. Background Technology

[0002] When performing vibration tests on a battery high-voltage box, a fixture is needed to fix the box onto the vibration table. The fixture is a key structure connecting the vibration table and the high-voltage box, and its core function is to accurately transmit vibration energy and avoid affecting the accuracy of the test due to resonance or deformation of the fixture.

[0003] The current fixture adopts a metal plate structure and is fixedly connected to the vibration table by threaded parts. Two rectangular protrusions are set on the fixture plate, and two sets of threaded holes are set on each of the two rectangular protrusions. The high-voltage box of the battery to be tested is fixed to the fixture plate by threaded parts.

[0004] However, battery high-voltage boxes are usually rectangular structures with high density. In order to make the tooling plate stable to connect with the battery high-voltage box and play a stable fixing effect in vibration testing, the tooling plate is mostly made of hard metal and is thick, resulting in the tooling plate being large in size and heavy in weight, which is not conducive to movement and disassembly. Utility Model Content

[0005] This application provides a vibration test structure for a battery high-voltage box, which solves the problem of inconvenient loading, unloading and movement of the fixed fixture plate of the vibration table during existing battery high-voltage box testing.

[0006] This application provides a vibration testing structure for a battery high-voltage box, including a vibration table, a high-voltage box, square tooling plates, and threaded fasteners. The high-voltage box is mounted on the vibration table and is rectangular. Two vibration mounting plates extend outward from the two side walls along the length of the high-voltage box, with the two vibration mounting plates on the same side of the high-voltage box spaced apart. The bottom wall of the vibration mounting plate is on the same plane as the bottom wall of the high-voltage box, and the vibration mounting plate is fixedly connected to the high-voltage box. Mounting holes are formed on the vibration mounting plates. Four square tooling plates are provided, each corresponding to one of the four vibration mounting plates. A threaded hole is provided in the center of the square tooling plate, and an internal thread is provided in the threaded hole. The threaded hole on the square tooling plate communicates with the mounting hole on the corresponding vibration mounting plate. Fixing holes are also formed on the square tooling plate, distributed around the threaded hole. Four threaded fasteners are provided, each corresponding to one of the four threaded holes. The threaded fasteners pass through the mounting holes and extend into the corresponding threaded holes. Fixed connectors are provided in the fixing holes and fixedly connect the square tooling plates and the vibration table.

[0007] This application uses a rigid connection chain of "vibration table → tooling plate → vibration mounting plate → high voltage box" to ensure that vibration energy is transmitted without attenuation and avoid vibration distortion caused by loose connections or gaps. Two vibration mounting plates are set on each side of the high voltage box at intervals, and the bottom wall of the mounting plate is coplanar with the bottom wall of the high voltage box, forming a "four-point symmetrical support" structure to prevent the high voltage box from tilting, shaking or falling off during testing and reduce the risk of structural damage.

[0008] The square fixture plates are installed in the fixing holes via fixed connectors and connected to the battery high-voltage box via threaded fasteners. This design offers good versatility and provides a good foundation for testing different batteries. In this solution, the battery high-voltage box is connected to the vibration table using only four square fixture plates, resulting in a simple connection structure. The square fixture plates are small in size, lightweight, and have low production requirements, improving the convenience of loading, unloading, and movement while reducing production costs.

[0009] In some embodiments of this application, each square tooling plate has four fixing holes, which are distributed around the threaded hole.

[0010] Four fixing holes are distributed around the threaded hole, so that the connection force between the tooling plate and the vibration table is symmetrically distributed around the core stress point, avoiding local stress concentration that could cause deformation of the tooling plate and ensuring that the tooling plate remains rigid during high-frequency / high-acceleration vibration. The symmetrically distributed fixing holes can reduce the "loose gap" between the tooling plate and the vibration table and avoid uneven vibration transmission caused by local connection failure.

[0011] In some embodiments of this application, the spacing between the fixing holes and the threaded holes is equal, and the spacing between two adjacent fixing holes is equal around the circumference of the threaded holes.

[0012] The evenly spaced distribution creates a "concentric circle symmetrical structure" at the connection point between the tooling plate and the vibration table. Regardless of whether the vibration direction is vertical, horizontal, or a combination of both, the tooling plate is subjected to uniform force in all areas, with no eccentric load moment, thus preventing the tooling plate from twisting and deforming during vibration. The evenly spaced design facilitates processing and positioning, reduces the manufacturing difficulty of the tooling plate, and ensures the interchangeability of tooling plates from different batches, reducing testing errors.

[0013] In some embodiments of this application, the fixing hole is a countersunk hole, and the limiting and abutting portion of the fixing connector is completely accommodated within the countersunk hole.

[0014] The countersunk hole design prevents the fixed connectors from protruding from the upper surface of the tooling plate, thus preventing mechanical interference with the vibration mounting plate of the high-voltage box and avoiding damage to the high-voltage box. At the same time, it can ensure that the vibration mounting plate and the tooling plate fit together completely, avoiding "vibration bouncing" caused by gaps and improving vibration transmission efficiency.

[0015] In some embodiments of this application, the four fixing holes are arranged in a square, and the distance between two adjacent fixing holes is 50mm or 100mm. 50mm and 100mm are common spacings for vibration table mounting holes, which conform to the general standards of industry testing equipment, improve the versatility of the tooling plate, and can be adapted to vibration tables of different brands and models, reducing customization costs.

[0016] The square distribution of the four fixing holes ensures that the force direction of the tooling plate is aligned with the geometric center, avoiding vibration direction deviation caused by asymmetrical hole positions.

[0017] In some embodiments of this application, the parallelism error range of the two side surfaces of the square tooling plate is 0.1 mm / m to 0.5 mm / m. Controlling the parallelism error within a low range avoids the formation of a "wedge gap" due to the tilting of the upper and lower surfaces of the tooling plate, preventing the vertical vibration of the vibration table from being converted into an additional tilting force on the high-voltage box. Strict error control ensures that the vibration environment experienced by each area of ​​the high-voltage box is consistent, making the test results more closely reflect actual working conditions.

[0018] In some embodiments of this application, the square tooling plate is a square steel plate. Steel has high strength and high elastic modulus, and is not prone to elastic deformation during high-frequency vibration or high-acceleration tests, thus avoiding test distortion caused by "resonance amplification" or "vibration attenuation" of the tooling plate.

[0019] In some embodiments of this application, the interval between the two vibration mounting plates located on both sides of the high-voltage box is equal. The equal interval between the vibration mounting plates on both sides ensures that the mounting support points of the high-voltage box are symmetrically distributed on both sides of its center of gravity, avoiding imbalance of the center of gravity of the high-voltage box due to the offset of the mounting points, preventing "swaying vibration" during testing, reducing the additional inertial force caused by the offset of the center of gravity, and ensuring that the high-voltage box maintains a stable posture during vibration. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0021] Figure 1 This is a schematic diagram of a vibration test structure for a battery high-voltage box provided in an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of a battery high-voltage box vibration test structure after the high-voltage box has been removed, as provided in an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of a square tooling plate in a vibration testing structure for a battery high-voltage box provided in an embodiment of this application.

[0024] Reference numerals: 1-Vibration table; 2-High pressure box; 21-Vibration mounting plate; 211-Mounting hole; 3-Square tooling plate; 31-Threaded hole; 32-Fixing hole; 4-Threaded fastener; 5-Fixing connector. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0029] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0030] When performing vibration tests on a battery high-voltage box, a fixture is needed to fix the box onto the vibration table. The fixture is a key structure connecting the vibration table and the high-voltage box, and its core function is to accurately transmit vibration energy and avoid affecting the accuracy of the test due to resonance or deformation of the fixture.

[0031] The current fixture adopts a metal plate structure and is fixedly connected to the vibration table by threaded parts. Two rectangular protrusions are set on the fixture plate, and two sets of threaded holes are set on each of the two rectangular protrusions. The high-voltage box of the battery to be tested is fixed to the fixture plate by threaded parts.

[0032] However, battery high-voltage boxes are usually rectangular structures with high density. In order to make the tooling plate stable to connect with the battery high-voltage box and play a stable fixing effect in vibration testing, the tooling plate is mostly made of hard metal and is thick, resulting in the tooling plate being large in size and heavy in weight, which is not conducive to movement and disassembly.

[0033] Therefore, please refer to Figure 1 This application provides a vibration test structure for a battery high-voltage box, including a vibration table 1, a high-voltage box 2, a square tooling plate 3, threaded fasteners 4, and a fixing connector 5.

[0034] Please refer to Figure 1 The high-pressure box 2 has a rectangular structure and is made of die-cast aluminum alloy. The material can be an Al-Si-Mg alloy, with a length range of 600-1200mm, a width range of 300-600mm, and a height range of 150-300mm.

[0035] Please refer to Figure 1 Two rectangular vibration mounting plates 21 are formed by extending vertically outward from the middle of the two side walls along the length of the high-voltage box 2. The vibration mounting plates 21 can be 80-120mm long, 60-100mm wide, and 8-12mm thick. The vibration mounting plates 21 can be fixed to the side walls of the high-voltage box 2 by welding, with a weld height ≥5mm, or they can be rigidly connected by bolts.

[0036] Please refer to Figure 1 Two vibration mounting plates 21 located on the same side of the high-voltage box 2 are distributed at intervals along the length direction. The distance between the two vibration mounting plates 21 on the same side can be 200-500mm, and the bottom wall of the vibration mounting plate 21 is on the same horizontal plane as the bottom wall of the high-voltage box 2. A circular mounting hole 211 is formed at the center of the vibration mounting plate 21, and the diameter of the circular mounting hole 211 can be 10-16mm.

[0037] Please refer to Figure 2Four square tooling plates 3 are provided, each with a square flat plate structure. The side length can be selected as 80-150mm, and the thickness as 15-30mm. The material can be carbon structural steel, such as 45 steel or Q235, which is heat-treated to ensure rigidity. A threaded hole 31 matching the mounting hole 211 of the vibration mounting plate 21 is opened in the middle of the tooling plate. The diameter of the threaded hole 31 can be 10-16mm, and the pitch is 1.5-2mm. The threaded hole 31 is coaxial with the corresponding mounting hole 211 of the vibration mounting plate 21.

[0038] Please refer to Figure 2 Four fixing holes 32 are evenly distributed around the threaded hole 31 on the tooling plate. The fixing holes 32 are stepped countersunk holes. The diameter of the fixing holes 32 can be 8-12mm, the depth of the countersunk hole can be ≥5mm, and the diameter of the countersunk hole is 1-2mm larger than the head diameter of the fixing connector 5.

[0039] Please refer to Figure 3 The threaded fastener 4 is a high-strength bolt that passes through the mounting hole 211 of the vibration mounting plate 21 and then engages with the threaded hole 31 of the square tooling plate 3 to achieve rigid fixation between the high-pressure box 2 and the tooling plate. The fixing connector 5 is a fully threaded bolt with a nut that passes through the fixing hole 32 of the tooling plate and then connects with the threaded hole 31 of the vibration table 1, so that the tooling plate fits tightly against the vibration table 1.

[0040] Please refer to Figure 2 In some examples, each square tooling plate 3 has four fixing holes 32, which are arranged in a square array around the threaded hole 31. The square formed by connecting the centers of the holes has a side length of 40-80mm.

[0041] Please refer to Figure 2 The symmetrical distribution of the four fixing holes 32 makes the connection between the tooling plate and the vibration table 1 form a balanced force system, which evenly transmits the excitation force of the vibration table 1 to the entire area of ​​the tooling plate, avoiding local deformation of the tooling plate due to excessive force at a single point, and ensuring that the tooling plate has no resonance phenomenon at the vibration frequency of 10-2000Hz.

[0042] Please refer to Figure 3 In some examples, the fixing hole 32 is a countersunk hole, and the bolt head or nut of the fixing connector 5 is completely accommodated in the countersunk hole.

[0043] Please refer to Figure 3 The countersunk hole structure prevents the fixing connector 5 from protruding from the surface of the tooling plate, preventing mechanical interference with the vibration mounting plate 21, while ensuring that the contact area between the vibration mounting plate 21 and the tooling plate is ≥95%, reducing the loss of vibration energy at the contact surface.

[0044] Please refer to Figure 2In some examples, the four fixing holes 32 are arranged in a square, and the hole spacing between two adjacent fixing holes 32 is 50mm or 100mm.

[0045] Please refer to Figure 2 The standardized hole spacing is compatible with the T-slot spacing of mainstream vibration tables 1 (compliant with ISO10816 vibration equipment standard), allowing the tooling plate to be directly installed on vibration tables 1 of different brands (such as Sushen, Aerospace Hill, etc.) without the need for additional processing of adapter holes, thus improving versatility.

[0046] In some examples, the parallelism error of the two side surfaces of the square tooling plate 3 ranges from 0.1 mm / m to 0.5 mm / m.

[0047] High-precision parallelism ensures that the upper and lower surfaces of the tooling plate are free from tilt angles, preventing the vertical vibration of the vibration table 1 from being converted into the tilting additional force of the high-pressure box 2, thereby improving the uniformity of vibration acceleration in each area of ​​the high-pressure box 2 by 20%.

[0048] In some examples, the square tooling plate 3 is a square steel plate. For example, the material is 45 steel, and it has been quenched and tempered.

[0049] The high elastic modulus of steel ensures that the tooling plate does not deform elastically under 30g acceleration vibration, avoiding vibration frequency distortion caused by tooling plate deformation. At the same time, the damping characteristics of steel can reduce high-frequency vibration noise.

[0050] Please refer to Figure 1 In some examples, the interval between the two vibration mounting plates 21 located on both sides of the high-voltage box 2 is equal, and they are symmetrically distributed on both sides of the center of gravity axis of the high-voltage box 2.

[0051] The symmetrical spacing distribution forms a balanced support system at the mounting points of the high-voltage box 2. During the test, the center of gravity offset of the high-voltage box 2 is ≤1mm, eliminating the "swaying vibration" phenomenon and reducing the risk of fatigue damage to internal components caused by eccentric vibration.

[0052] This application provides a vibration test structure for a battery high-voltage box, including a vibration table 1, a high-voltage box 2, a square tooling plate 3, and threaded fasteners 4. The high-voltage box 2 is a cuboid with a length of 800mm, a width of 400mm, and a height of 200mm. Two vibration mounting plates 21 extend outward from the two side walls along the length of the high-voltage box 2, respectively. The vibration mounting plates 21 are fixedly connected to the high-voltage box 2 by welding. The two vibration mounting plates 21 located on the same side of the high-voltage box 2 are spaced apart by a distance of 300mm. The bottom wall of the vibration mounting plate 21 is on the same plane as the bottom wall of the high-voltage box 2. A mounting hole 211 with a diameter of 12mm is formed on the vibration mounting plate 21.

[0053] Four square tooling plates 3 are provided, each corresponding to one of the four vibration mounting plates 21. Each square tooling plate 3 is a square steel plate with a side length of 100mm and a thickness of 20mm, made of 45# steel. The parallelism error of the two surfaces of the square tooling plate 3 is 0.2mm / m. A threaded hole 31 with a diameter of 12mm is provided in the center of each square tooling plate 3. The threaded hole 31 has an internal thread and communicates with the corresponding mounting hole 211 on the vibration mounting plate 21.

[0054] The square tooling plate 3 also has four fixing holes 32 arranged around the threaded holes 31. The fixing holes 32 are countersunk holes, and the spacing between the fixing holes 32 and the threaded holes 31 is equal, each 30mm. Around the circumference of the threaded holes 31, the spacing between adjacent fixing holes 32 is equal. The four fixing holes 32 are arranged in a square pattern, with a hole spacing of 50mm between adjacent fixing holes 32. Four threaded fasteners 4, using M12 bolts, are provided. Each of the four threaded fasteners 4 corresponds to one of the four threaded holes 31. The threaded fasteners 4 pass through the mounting holes 211 and extend into the corresponding threaded holes 31. The fixing connector 5, using M8 bolts, is installed within the fixing holes 32. The bolt head of the fixing connector 5 is completely accommodated within the countersunk holes. The fixing connector 5 securely connects the square tooling plate 3 and the vibration table 1.

[0055] This application provides another battery high-voltage box vibration test structure, including a vibration table 1, a high-voltage box 2, a square tooling plate 3, and threaded fasteners 4. The high-voltage box 2 is a cuboid with a length of 1000mm, a width of 500mm, and a height of 250mm. Two vibration mounting plates 21 extend outward from the two side walls along the length of the high-voltage box 2, respectively. The vibration mounting plates 21 are fixedly connected to the high-voltage box 2 by bolts. The two vibration mounting plates 21 located on the same side of the high-voltage box 2 are spaced apart by a distance of 400mm. The bottom wall of the vibration mounting plate 21 is on the same plane as the bottom wall of the high-voltage box 2. A mounting hole 211 with a diameter of 14mm is formed on the vibration mounting plate 21.

[0056] Four square tooling plates 3 are provided, each corresponding to one of the four vibration mounting plates 21. Each square tooling plate 3 is a square steel plate with a side length of 120mm and a thickness of 25mm, made of Q235 steel. The parallelism error of the two sides of the square tooling plate 3 is 0.4mm / m. A threaded hole 31 with a diameter of 14mm is provided in the center of each square tooling plate 3. The threaded hole 31 has an internal thread and communicates with the corresponding mounting hole 211 on the vibration mounting plate 21.

[0057] The square tooling plate 3 also has four fixing holes 32 arranged around the threaded holes 31. The fixing holes 32 are countersunk holes, and the spacing between the fixing holes 32 and the threaded holes 31 is equal, each 35mm. Around the circumference of the threaded holes 31, the spacing between adjacent fixing holes 32 is equal. The four fixing holes 32 are arranged in a square pattern, with a hole spacing of 100mm between adjacent fixing holes 32. Four threaded fasteners 4, using M14 bolts, are provided. Each of the four threaded fasteners 4 corresponds to one of the four threaded holes 31. The threaded fasteners 4 pass through the mounting holes 211 and extend into the corresponding threaded holes 31. The fixing connector 5, using M10 bolts, is installed within the fixing holes 32. The bolt head of the fixing connector 5 is completely accommodated within the countersunk holes. The fixing connector 5 fixes the square tooling plate 3 and the vibration table 1.

[0058] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A vibration testing structure for a battery high-voltage box, characterized in that, include: Vibration table; A high-voltage box is mounted on the vibration table. The high-voltage box is rectangular, and two vibration mounting plates extend outward from the two side walls along the length of the high-voltage box. The two vibration mounting plates on the same side of the high-voltage box are spaced apart. The bottom wall of the vibration mounting plate is on the same plane as the bottom wall of the high-voltage box. The vibration mounting plate is fixedly connected to the high-voltage box, and mounting holes are formed on the vibration mounting plate. Four square tooling plates are provided, and each of the four square tooling plates corresponds to one of the four vibration mounting plates. A threaded hole is provided in the middle of the square tooling plate, and an internal thread is provided in the threaded hole. The threaded hole on the square tooling plate is connected to the mounting hole on the corresponding vibration mounting plate. Fixing holes distributed around the threaded hole are also formed on the square tooling plate. Four threaded fasteners are provided, and the four threaded fasteners correspond one-to-one with the four threaded holes. The threaded fasteners pass through the mounting holes and extend into the corresponding threaded holes. A fixing connector is disposed in the fixing hole, and the fixing connector fixes the square tooling plate and the vibration table.

2. The battery high-voltage box vibration test structure according to claim 1, characterized in that, Each of the square tooling plates has four fixing holes, which are distributed around the threaded hole.

3. The battery high-voltage box vibration test structure according to claim 2, characterized in that, The spacing between the fixing holes and the threaded holes is equal, and the spacing between two adjacent fixing holes is equal around the circumference of the threaded holes.

4. The battery high-voltage box vibration test structure according to claim 1, characterized in that, The fixing hole is a countersunk hole, and the limiting and abutting part of the fixing connector is completely accommodated in the countersunk hole.

5. The battery high-voltage box vibration test structure according to claim 2, characterized in that, The four fixing holes are arranged in a square, and the distance between two adjacent fixing holes is 50mm or 100mm.

6. The battery high-voltage box vibration test structure according to any one of claims 1 to 5, characterized in that, The parallelism error range of the two sides of the square tooling plate is 0.1 mm / m to 0.5 mm / m.

7. The battery high-voltage box vibration test structure according to claim 1, characterized in that, The square tooling plate is a square steel plate.

8. The battery high-voltage box vibration test structure according to claim 1, characterized in that, The interval between the two vibration mounting plates located on both sides of the high-voltage box is equal.

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