Vibration test tool

Abstract

The utility model relates to a vibration test tool which comprises a base and a connecting assembly, the base is provided with a mounting cavity, the connecting assembly is arranged in the mounting cavity and connected with the inner wall of the mounting cavity, the connecting assembly comprises a first connecting structure and a second connecting structure, the first connecting structure is located on the side close to a battery pack, and the first connecting structure forms a first connecting surface; the first connecting surface is suitable for being connected with the battery pack, the second connecting structure is located on the side away from the battery pack, the second connecting structure forms a second connecting surface, and the second connecting surface supports the battery pack through the first connecting surface. The connecting assembly is arranged to be of a double-layer structure in which the first connecting structure and the second connecting structure are matched, the overall rigidity of the vibration testing tool can be enhanced, the deformation condition of the tool in a vibration test is reduced, it is ensured that vibration excitation of the vibration table is accurately transmitted to the battery pack through the vibration testing tool, and the vibration testing efficiency is improved. Therefore, the accuracy of a battery pack vibration test result is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of battery pack vibration testing, and in particular to vibration testing tooling. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] As the power component of the vehicle, the battery pack is usually hung at the bottom of the vehicle body. The vehicle will vibrate during driving. To ensure the factory performance of the battery pack, the battery pack needs to be transferred to the vibration table through a vibration fixture for vibration testing to simulate the structural stability of the battery pack when the vehicle is in operation. During this process, the vibration excitation of the vibration table needs to be transmitted to the battery pack through the vibration fixture without distortion, which requires the vibration fixture to have sufficient rigidity. The existing vibration fixture structures are mostly rectangular frame structures formed by cross beams and longitudinal beams, which are prone to local deformation during vibration tests, resulting in distortion of vibration excitation transmission and inaccurate test results. Utility Model Content

[0004] The purpose of this application is to at least solve the technical problem that the vibration excitation transmission is distorted and the test results are inaccurate due to the easy deformation of the vibration tooling in the existing battery pack vibration test. This purpose is achieved through the following technical solutions:

[0005] The present application provides a vibration testing tool, which is suitable for connecting to a battery pack to perform vibration testing on the battery pack. The vibration testing tool includes a base and a connecting assembly. The base is provided with an installation cavity. The connecting assembly is arranged in the installation cavity and connected to the inner wall of the installation cavity. The connecting assembly includes a first connecting structure and a second connecting structure. The first connecting structure is located on a side close to the battery pack, and the first connecting structure forms a first connecting surface, which is suitable for connecting to the battery pack. The second connecting structure is located on a side away from the battery pack, and the second connecting structure forms a second connecting surface, which supports the battery pack through the first connecting surface.

[0006] The vibration test fixture of the present application enhances the overall rigidity of the vibration test fixture by configuring the connection component to be a double-layer structure in which a first connection structure cooperates with a second connection structure. The first connection structure forms a first connection surface suitable for connecting to a battery pack, and the second connection structure forms a second connection surface. The second connection surface supports the battery pack through the first connection surface, so that both the first connection surface and the second connection surface support the battery pack under force, thereby improving the support stability, reducing the deformation of the fixture during the vibration test, and ensuring that the vibration excitation of the vibration table is accurately transmitted to the battery pack through the vibration test fixture, thereby ensuring the accuracy of the battery pack vibration test results.

[0007] In some embodiments, a cavity is formed between the first connecting surface and the second connecting surface.

[0008] In some embodiments, the first connecting structure includes a first connecting rib and a second connecting rib, wherein a plurality of the first connecting ribs are arranged side by side and extend along a first direction, and both ends of the first connecting ribs are connected to the inner wall of the installation cavity, and a plurality of the second connecting ribs are arranged side by side and extend along a second direction, and the second connecting ribs and the first connecting ribs are connected to form the first connecting surface, the second direction forms an angle with the first direction, and both ends of the second connecting ribs are connected to the inner wall of the installation cavity.

[0009] In some embodiments, a plurality of the first connecting ribs are arranged at equal intervals along the second direction, and / or a plurality of the second connecting ribs are arranged at equal intervals along the first direction.

[0010] In some embodiments, the second connecting structure includes a third connecting rib and a fourth connecting rib, wherein a plurality of the third connecting ribs are arranged side by side and extend along the first direction, and both ends of the third connecting ribs are connected to the inner wall of the installation cavity, and a plurality of the fourth connecting ribs are arranged side by side and extend along the second direction, and the fourth connecting ribs are connected to the third connecting ribs to form the second connecting surface, and both ends of the fourth connecting ribs are connected to the inner wall of the installation cavity.

[0011] In some embodiments, a plurality of the third connecting ribs are arranged at equal intervals along the second direction, and / or a plurality of the fourth connecting ribs are arranged at equal intervals along the first direction.

[0012] In some embodiments, the end of the third connecting rib is provided with a first oblique rib inclined toward the battery pack, and the third connecting rib is connected to the first connecting rib and the inner wall of the mounting cavity through the first oblique rib; the end of the fourth connecting rib is provided with a second oblique rib inclined toward the battery pack, and the fourth connecting rib is connected to the second connecting rib and the inner wall of the mounting cavity through the second oblique rib.

[0013] In some embodiments, the cavity includes a first cavity, the fourth connecting rib and the second connecting rib are correspondingly arranged and cooperate to form the first cavity, and the connecting assembly also includes a first supporting rib extending toward the battery pack, which is arranged in the first cavity, and one end of the first supporting rib is connected to the second connecting rib, and the other end of the first supporting rib is connected to the fourth connecting rib.

[0014] In some embodiments, the cavity includes a second cavity, the third connecting rib and the first connecting rib are correspondingly arranged and cooperate to form a second cavity, and the connecting assembly also includes a second support rib extending toward the battery pack, which is arranged in the second cavity, and one end of the second support rib is connected to the first connecting rib, and the other end of the second support rib is connected to the third connecting rib.

[0015] In some embodiments, the first cavity and / or the second cavity is a trapezoidal cavity.

[0016] In some embodiments, the base includes a first beam and a second beam that are connected, and the first beam and the second beam are alternately connected to form the installation cavity. The vibration testing tool also includes a column extending toward the battery pack and suitable for abutting the battery pack, and the column is connected to the first beam and / or the second beam.

[0017] In some embodiments, the second beam has a slot suitable for placing the battery pack, the column is connected to the first beam, and an end surface of the column facing the battery pack is coplanar with a bottom surface of the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a vibration testing tooling according to an embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the structure of the vibration test tooling according to an embodiment of the present application from a bottom view;

[0021] Figure 3 A front view of a vibration testing tool according to an embodiment of the present application;

[0022] Figure 4 It is a side view of the vibration testing tooling according to an embodiment of the present application.

[0023] The reference numerals are as follows:

[0024] 1. base; 11. first beam body; 12. second beam body; 121. installation cavity; 122. tank body;

[0025] 2. first connection structure; 21. first connection rib; 22. second connection rib; 211. second cavity;

[0026] 3. Second connection structure; 31. Third connection rib; 311. First oblique rib; 32. Fourth connection rib; 321. First cavity; 322. Second oblique rib;

[0027] 4. The first supporting rib;

[0028] 5. Column;

[0029] 6. Connection hole. DETAILED DESCRIPTION

[0030] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the present application describes the installation component through an external camera of a vehicle, which is only a preferred embodiment and is not a limitation on the scope of application of the installation component. For example, the installation component of the present application can also be used to install other external sensors such as radar sensors, etc. This adjustment also falls within the scope of protection of the installation component of the present application.

[0031] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", and "have" are inclusive and therefore specify the presence of stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0032] Although the terms first, second, etc. may be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. In addition, in the description of this application, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0033] For ease of description, spatial relative terms can be used in the text to describe the relationship of an element or feature relative to another element or feature as shown in the figure, and these relative terms are, for example, "outside", "inside", "side", "end", "bottom", "edge", "inside", "outside", "front", "back", "top", "bottom", etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation except the orientation depicted in the figure. For example, if the mechanism in the figure flips, the element described as "below other elements or features" or "below other elements or features" will be subsequently oriented to "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include the orientation on and below. The mechanism can be oriented in addition (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0034] Explanation of related names: the natural frequency is the frequency of an object when it vibrates freely. It has nothing to do with the initial conditions, but is only related to the mass, shape, stiffness of the material, and Young's modulus of the system. A system with a single degree of freedom has only one natural frequency. The mode uses natural frequency, mass, stiffness, damping, and modal vibration shape as parameters to jointly describe the dynamic characteristics of a system, which is called the mode of the system. The classic definition of modal analysis: transform the physical coordinates in the linear steady-state system vibration differential equation group into modal coordinates, decouple the equation group, and become a set of independent equations described by modal coordinates and modal parameters, so as to find the modal parameters of the system. The transformation matrix of the coordinate transformation is the modal matrix, and each column is the modal vibration shape. In short, it is to decouple the natural frequencies of each order of the system.

[0035] Introduction to related technologies: For battery systems, when testing on a vibration table according to the standard, the battery pack to be tested needs to be transferred to the vibration table through a vibration fixture. This requires that the vibration fixture needs to have sufficient rigidity to transmit the vibration excitation of the vibration table to the battery pack without distortion. This requires that the natural frequency of the vibration fixture be greater than the excitation frequency of the vibration table. If the designed vibration fixture is not rigid enough, the vibration excitation transmitted from the vibration table to the battery pack will be distorted, which is manifested by a chaotic sweep frequency curve, affecting the determination of the vibration test results. In this case, retesting is generally required. The cost of testing alone is usually tens of thousands of yuan, and the cost of the battery pack to be tested is even more expensive, and it delays the project cycle and wastes work time.

[0036] Based on the above problems, the embodiment of the present application proposes a vibration test tool, such as Figures 1 to 4As shown, it includes a base 1 and a connecting component, wherein the base 1 is provided with a mounting cavity 121, the connecting component is arranged in the mounting cavity 121 and connected to the inner wall of the mounting cavity 121, the connecting component includes a first connecting structure 2 and a second connecting structure 3, the first connecting structure 2 is located on a side close to the battery pack, the first connecting structure 2 forms a first connecting surface, and the first connecting surface is suitable for connecting to the battery pack, the second connecting structure 3 is located on a side away from the battery pack, the second connecting structure 3 forms a second connecting surface, and the second connecting surface supports the battery pack through the first connecting surface.

[0037] The vibration test fixture of the present application is composed of a base 1 and a connecting component. The overall rigidity of the vibration test fixture is enhanced by setting the connecting component as a double-layer structure in which a first connecting structure 2 and a second connecting structure 3 cooperate. The first connecting structure 2 forms a first connecting surface suitable for connecting to a battery pack, and the second connecting structure 3 forms a second connecting surface. The second connecting surface supports the battery pack through the first connecting surface, so that the first connecting surface and the second connecting surface both support the battery pack under force, thereby improving the support stability, reducing the deformation of the fixture during the vibration test, and ensuring that the vibration excitation of the vibration table is accurately transmitted to the battery pack through the vibration test fixture, thereby ensuring the accuracy of the battery pack vibration test results.

[0038] It should be noted that the vibration testing tool of the present application is suitable for being connected to a battery pack to perform vibration testing on the battery pack so as to analyze the performance of the battery pack. Of course, in other embodiments, the vibration testing tool of the present application can also be applied to vibration test scenarios of other products, not limited to this embodiment.

[0039] In this embodiment, a cavity is formed between the first connection surface and the second connection surface, which reduces the overall weight of the vibration test fixture and contributes to a lightweight structure design.

[0040] In terms of specific structure, in this embodiment, the first connecting structure 2 includes a first connecting rib 21 and a second connecting rib 22, wherein a plurality of first connecting ribs 21 are arranged side by side and extend along the first direction, and both ends of the first connecting rib 21 are connected to the inner wall of the installation cavity 121, and a plurality of second connecting ribs 22 are arranged side by side and extend along the second direction, and the second connecting rib 22 and the first connecting rib 21 are connected to form a first connecting surface, the second direction forms an angle with the first direction, and both ends of the second connecting rib 22 are connected to the inner wall of the installation cavity 121.

[0041] By configuring the first connecting structure 2 to include a first connecting rib 21 extending along a first direction and a second connecting rib 22 extending along a second direction, the second direction forms an angle with the first direction, and both ends of the first connecting rib 21 and the second connecting rib 22 are connected to the inner wall of the mounting cavity 121, the structural stiffness of the entire vibration test fixture along the first direction and the second direction is enhanced.

[0042] It can be understood that a plurality of first connecting ribs 21 arranged side by side and a plurality of second connecting ribs 22 arranged side by side are connected to form a first connecting surface.

[0043] Further, a plurality of first connecting ribs 21 are arranged at equal intervals along the second direction, and / or a plurality of second connecting ribs 22 are arranged at equal intervals along the first direction. Arranging a plurality of first connecting ribs 21 at equal intervals along the second direction and a plurality of second connecting ribs 22 at equal intervals along the first direction can improve the force balance of the first connecting structure 2 along the second direction and the first direction, ensure that the structural rigidity at each location is the same, and reduce the risk of local deformation due to unbalanced force.

[0044] In this embodiment, three first connecting ribs 21 can be arranged at equal intervals along the second direction, and three second connecting ribs 22 can be arranged at equal intervals along the first direction. The three first connecting ribs 21 and the three second connecting ribs 22 are cross-connected to form a first connecting surface.

[0045] The second connection structure 3 is similar to the first connection structure 2 in configuration. Specifically, the second connection structure 3 includes a third connection rib 31 and a fourth connection rib 32, wherein a plurality of third connection ribs 31 are arranged side by side and extend along the first direction, and both ends of the third connection rib 31 are connected to the inner wall of the installation cavity 121, and a plurality of fourth connection ribs 32 are arranged side by side and extend along the second direction, and the fourth connection rib 32 is connected to the third connection rib 31 to form a second connection surface, and both ends of the fourth connection rib 32 are connected to the inner wall of the installation cavity 121.

[0046] By configuring the second connecting structure 3 to include a third connecting rib 31 extending along the first direction and a fourth connecting rib 32 extending along the second direction, and the two ends of the third connecting rib 31 and the fourth connecting rib 32 are connected to the inner wall of the mounting cavity 121, the structural stiffness of the entire vibration test fixture along the first direction and the second direction is further enhanced.

[0047] Therefore, the present application ensures the structural stiffness of the vibration test fixture along the first direction by setting the first connecting rib 21 and the third connecting rib 31 extending along the first direction, and ensures the structural stiffness of the vibration test fixture along the second direction by setting the second connecting rib 22 and the fourth connecting rib 32 extending along the second direction, thereby ensuring the structural stiffness of the vibration test fixture along the first direction and the second direction.

[0048] It can be understood that a plurality of third connecting ribs 31 arranged side by side and a plurality of fourth connecting ribs 32 arranged side by side are connected to form a second connecting surface.

[0049] Further, a plurality of third connecting ribs 31 are arranged at equal intervals along the second direction, and / or a plurality of fourth connecting ribs 32 are arranged at equal intervals along the first direction. Arranging a plurality of third connecting ribs 31 at equal intervals along the second direction and a plurality of fourth connecting ribs 32 at equal intervals along the first direction can improve the force balance of the second connecting structure 3 along the second direction and the first direction, ensure that the structural rigidity at each location is the same, and reduce the risk of local deformation due to unbalanced force.

[0050] Therefore, the present application ensures that the structural stiffness of the vibration test tooling along the first direction and the second direction is consistent by arranging the first connecting ribs 21 and the third connecting ribs 31 at equal intervals along the second direction, and arranging the second connecting ribs 22 and the fourth connecting ribs 32 at equal intervals along the first direction, thereby avoiding deformation caused by insufficient local stiffness.

[0051] In this embodiment, three third connecting ribs 31 may be arranged at intervals along the second direction, and three fourth connecting ribs 32 may be arranged at intervals along the first direction. The three third connecting ribs 31 and the three fourth connecting ribs 32 are cross-connected to form a second connecting surface.

[0052] Optionally, a first oblique rib 311 inclined toward the battery pack is provided at the end of the third connecting rib 31, and the third connecting rib 31 is connected to the first connecting rib 21 and the inner wall of the mounting cavity 121 through the first oblique rib 311, and a second oblique rib 322 inclined toward the battery pack is provided at the end of the fourth connecting rib 32, and the fourth connecting rib 32 is connected to the second connecting rib 22 and the inner wall of the mounting cavity 121 through the second oblique rib 322.

[0053] The third connecting rib 31 is specifically connected to the first connecting rib 21 and the inner wall of the installation cavity 121 through the first oblique rib 311, and the fourth connecting rib 32 is specifically connected to the second connecting rib 22 and the inner wall of the installation cavity 121 through the second oblique rib 322, so that the third connecting rib 31, the first connecting rib 21 and the inner wall of the installation cavity 121 are connected at one point, and the fourth connecting rib 32, the second connecting rib 22 and the inner wall of the installation cavity 121 are connected at one point, thereby reducing point installation and improving installation efficiency, and the first oblique rib 311 and the second oblique rib 322 can also provide oblique support force to further enhance the structural rigidity.

[0054] In this embodiment, the cavity includes a first cavity 321, the fourth connecting rib 32 and the second connecting rib 22 are correspondingly arranged and cooperate to form the first cavity 321, and the connecting component also includes a first supporting rib 4 extending toward the battery pack, which is arranged in the first cavity 321, and one end of the first supporting rib 4 is connected to the second connecting rib 22, and the other end of the first supporting rib 4 is connected to the fourth connecting rib 32.

[0055] The first cavity 321 realizes structural weight reduction, and the first supporting rib 4 can connect and support the second connecting rib 22 and the fourth connecting rib 32 , and can also compensate for the weakening of the structure between the second connecting rib 22 and the fourth connecting rib 32 due to the opening of the first cavity 321 .

[0056] Furthermore, the cavity includes a second cavity 211, the third connecting rib 31 and the first connecting rib 21 are correspondingly arranged and cooperate with each other to form the second cavity 211, and the connecting assembly also includes a second supporting rib (not shown in the figure) extending toward the battery pack, which is arranged in the second cavity 211, and one end of the second supporting rib is connected to the first connecting rib 21, and the other end of the second supporting rib is connected to the third connecting rib 31.

[0057] The second cavity 211 further reduces the weight of the structure. The second supporting ribs can provide connection support between the first connecting rib 21 and the third connecting rib 31 , and can also compensate for the weakening of the structure between the first connecting rib 21 and the third connecting rib 31 due to the opening of the second cavity 211 .

[0058] In this embodiment, the three fourth connecting ribs 32 and the three second connecting ribs 22 cooperate with each other to form three first cavities 321, thereby achieving a significant weight reduction effect.

[0059] Specifically, the first support rib 4 and the second support rib may extend along a third direction, which is perpendicular to the battery pack, so that the structural stiffness of the vibration test fixture along the third direction is enhanced by the provision of the first support rib 4 and / or the second support rib.

[0060] Of course, in other embodiments, the first supporting rib 4 may also be arranged obliquely in the first cavity 321 , and the second supporting rib may also be arranged obliquely in the second cavity 211 , which is not limited to this embodiment.

[0061] In this embodiment, only the first support rib 4 is provided in the first cavity 321 , and a plurality of first support ribs 4 are provided at intervals along the length direction of the first cavity 321 , which can ensure that the stiffness of the entire vibration test fixture in the third direction meets the requirements.

[0062] Of course, in other embodiments, the second supporting rib may be provided only in the second cavity 211, or the first supporting rib 4 may be provided in the first cavity 321 and the second supporting rib may be provided in the second cavity 211 at the same time, which is not limited to the solution of this embodiment.

[0063] It should be noted that the first direction in this embodiment is Figure 1 The direction indicated by the x arrow in the middle, the second direction is Figure 1 The direction indicated by the y arrow, the third direction is Figure 1In the direction indicated by the z arrow, the first connecting rib 21 and the third connecting rib 31 are extended along the x direction, the second connecting rib 22 and the fourth connecting rib 32 are extended along the y direction, and the first supporting rib 4 and / or the second supporting rib are extended along the z direction, thereby enhancing the stiffness of the vibration test fixture along the x direction, the y direction and the z direction.

[0064] In terms of specific shape, the second cavity 211 and / or the first cavity 321 is a trapezoidal cavity, which has a stable structure and saves material cost.

[0065] The second cavity 211 and the first cavity 321 can both be configured as a trapezoidal cavity that is small at the top and large at the bottom (large at the side close to the battery pack and small at the side away from the battery pack). The trapezoidal cavity can specifically be a right-angled trapezoidal cavity or an isosceles trapezoidal cavity.

[0066] In addition, the base 1 includes a first beam 11 and a second beam 12 connected to each other, wherein the first beam 11 and the second beam 12 are alternately connected to form an installation cavity 121. In this embodiment, the vibration test fixture also includes a column 5 extending toward the battery pack and suitable for abutting the battery pack, and the column 5 is connected to the first beam 11 and / or the second beam 12. The first beam 11 and the second beam 12 are alternately connected to form the installation cavity 121 to ensure the structural strength of the base 1. The column 5 extending toward the battery pack can enhance the structural rigidity of the first beam 11 and / or the second beam 12 and reduce their deformation during the vibration test.

[0067] In this embodiment, two first beams 11 are arranged at intervals along the first direction, and two second beams 12 are arranged at intervals along the second direction. The two first beams 11 and the two second beams 12 are alternately connected to form a rectangular base 1, and the corresponding installation cavity 121 is also a rectangular cavity.

[0068] Specifically, the column 5 can be arranged along the third direction (vertical to the direction of the battery pack, i.e. Figure 1 The first beam body 11 and the second beam body 12 extend in the direction indicated by the z arrow in the figure to enhance the structural rigidity of the first beam body 11 and / or the second beam body 12 along the z direction.

[0069] The second beam 12 has a slot 122 suitable for placing the battery pack, and the column 5 is connected to the first beam 11, and the end surface of the column 5 facing the battery pack is coplanar with the bottom surface of the slot 122. The slot 122 facilitates the placement of the battery pack and limits the installation of the battery pack. The connection of the column 5 to the first beam 11 can enhance the structural rigidity of the first beam 11, and the end surface of the column 5 facing the battery pack is coplanar with the bottom surface of the slot 122, so that the battery pack can be supported by the bottom surface of the slot 122 and the end surface of the column 5 at the same time, thereby improving the stability of the vibration test.

[0070] Specifically, the deformation positions of the two first beams 11 can be analyzed according to the vibration deformation data, and the positions and numbers of the columns 5 can be designed. For example, if one of the first beams 11 has one deformation point and the other first beam 11 has three deformation points, then one column 5 is set on one of the first beams 11, and three columns 5 are set at corresponding positions of the other first beam 11.

[0071] It should be noted that, after analysis and comparison of test data, by adding column 5, a frequency increase of 80 Hz can be provided at the front and rear, which helps to improve the overall stiffness of the vibration test fixture.

[0072] In addition, in order to facilitate the connection between the vibration test fixture and the battery pack to be tested, connection holes 6 are provided on the base 1 and the connection assembly, and the battery pack is connected to the base 1 and the connection assembly through the connection holes 6.

[0073] Specifically, the connecting holes 6 can be arranged along the length direction of the first beam body 11 and the second beam body 12, and a plurality of connecting holes 6 can be correspondingly arranged on the first connecting rib 21 and the third connecting rib 31, the second connecting rib 22 and the fourth connecting rib 32, and the battery pack can be connected and fixed by passing long bolts through the connecting holes 6.

[0074] It should be noted that when the vehicle is driving, the vibration excitation frequency transmitted from the vehicle body to the battery pack is about 5Hz-200Hz, which requires the natural frequency of the vibration tooling to be greater than 200Hz to avoid the resonance problem between the vibration tooling and the battery pack. To facilitate the understanding of the vibration test tooling of this application, a modal analysis comparison is now conducted between the vibration tooling of the prior art and the vibration test tooling of this application, as shown in Table 1 below:

[0075] Table 1

[0076]

[0077] It can be seen from Table 1 that the modal frequencies of the existing vibration fixtures in each modal order are all less than 200 Hz, which means that during the battery pack vibration test, there is a high probability of resonance between the vibration fixture and the battery pack. The modal frequency values ​​of the vibration test fixture in each stage of the present application are all greater than 200 Hz, which is greater than the vibration excitation frequency of 5 Hz-200 Hz transmitted from the vehicle body to the battery pack, thus avoiding the resonance problem between the vibration test fixture and the battery pack.

[0078] In addition, in terms of weight, the present application also has obvious advantages over existing vibration tooling. The existing design of vibration tooling weighs 863.8 kg, and the overall weight of the vibration test tooling of the present application is 686.7 kg. Compared with the existing design, the present application achieves weight reduction and cost reduction, and has good economic benefits.

[0079] In order to facilitate the understanding of the vibration test tool of this embodiment, the following is a Figure 1 To Attachment Figure 4 The principle of its use is introduced as follows:

[0080] The battery pack to be tested is placed in the slot 122 of the base 1, and the battery pack is fixedly connected to the vibration test fixture of the present application through the cooperation of a plurality of long bolts and the connection holes 6;

[0081] The vibration test fixture is connected to the vibration table. During the vibration test, the vibration frequency of the vibration table is transmitted to the battery pack through the vibration test fixture. The first connecting ribs 21 and the third connecting ribs 31 extending along the first direction (the direction indicated by the x arrow) enhance the stiffness of the vibration test fixture along the first direction, and can withstand the vibration from the vibration table along the first direction. The second connecting ribs 22 and the fourth connecting ribs 32 extending along the second direction (the direction indicated by the y arrow) enhance the stiffness of the vibration test fixture along the second direction, and can withstand the vibration from the vibration table along the second direction. The setting of the first supporting rib 4 and the column 5 enhances the stiffness of the vibration test fixture along the third direction (the direction indicated by the z arrow), and can withstand the vibration from the vibration table along the third direction, thereby enhancing the stiffness of the vibration test fixture along the three directions of xyz.

[0082] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A vibration test tool, suitable for connecting to a battery pack to perform vibration test on the battery pack, characterized in that: The vibration test tooling comprises: A base (1) is provided with a mounting cavity (121); A connection component is arranged in the installation cavity (121) and connected to the inner wall of the installation cavity (121), the connection component comprises a first connection structure (2) and a second connection structure (3), the first connection structure (2) is located on a side close to the battery pack, the first connection structure (2) forms a first connection surface, the first connection surface is suitable for connecting to the battery pack, the second connection structure (3) is located on a side away from the battery pack, the second connection structure (3) forms a second connection surface, the second connection surface supports the battery pack through the first connection surface.

2. The vibration test tool according to claim 1, characterized in that: A cavity is formed between the first connecting surface and the second connecting surface.

3. The vibration test tool according to claim 2, characterized in that: The first connection structure (2) comprises: A plurality of first connecting ribs (21) are arranged side by side and extend along a first direction, and two ends of the first connecting ribs (21) are connected to the inner wall of the installation cavity (121); A plurality of second connecting ribs (22) are arranged side by side and extend along a second direction; the second connecting ribs (22) and the first connecting ribs (21) are connected to form the first connecting surface; the second direction forms an angle with the first direction; and two ends of the second connecting ribs (22) are connected to the inner wall of the mounting cavity (121).

4. The vibration test tool according to claim 3, characterized in that: A plurality of the first connecting ribs (21) are arranged at equal intervals along the second direction, and / or a plurality of the second connecting ribs (22) are arranged at equal intervals along the first direction.

5. The vibration test tool according to claim 3 or 4, characterized in that: The second connection structure (3) comprises: A plurality of third connecting ribs (31) are arranged side by side and extend along the first direction, and two ends of the third connecting ribs (31) are connected to the inner wall of the installation cavity (121); A plurality of fourth connecting ribs (32) are arranged side by side and extend along the second direction; the fourth connecting ribs (32) are connected to the third connecting ribs (31) to form the second connecting surface; and both ends of the fourth connecting ribs (32) are connected to the inner wall of the installation cavity (121).

6. The vibration test tool according to claim 5, characterized in that: The plurality of third connecting ribs (31) are arranged at equal intervals along the second direction, and / or the plurality of fourth connecting ribs (32) are arranged at equal intervals along the first direction.

7. The vibration test tool according to claim 5, characterized in that: The end of the third connecting rib (31) is provided with a first oblique rib (311) inclined toward the battery pack, and the third connecting rib (31) is connected to the first connecting rib (21) and the inner wall of the installation cavity (121) through the first oblique rib (311); The end of the fourth connecting rib (32) is provided with a second oblique rib (322) inclined toward the battery pack, and the fourth connecting rib (32) is connected to the second connecting rib (22) and the inner wall of the mounting cavity (121) via the second oblique rib (322).

8. The vibration test tool according to claim 5, characterized in that: The cavity comprises a first cavity (321), and the fourth connecting rib (32) and the second connecting rib (22) are arranged correspondingly and cooperate with each other to form the first cavity (321); The connection assembly also includes a first support rib (4) extending toward the battery pack and disposed in the first cavity (321), wherein one end of the first support rib (4) is connected to the second connection rib (22), and the other end of the first support rib (4) is connected to the fourth connection rib (32).

9. The vibration testing tool according to claim 8, characterized in that: The cavity comprises a second cavity (211), and the third connecting rib (31) and the first connecting rib (21) are arranged correspondingly and cooperate with each other to form the second cavity (211); The connection assembly also includes a second support rib extending toward the battery pack and disposed in the second cavity (211), wherein one end of the second support rib is connected to the first connection rib (21), and the other end of the second support rib is connected to the third connection rib (31).

10. The vibration testing tool according to claim 9, characterized in that: The first cavity (321) and / or the second cavity (211) is a trapezoidal cavity.

11. The vibration testing tool according to any one of claims 1 to 4, characterized in that: The base (1) comprises a first beam body (11) and a second beam body (12) which are connected to each other, and the first beam body (11) and the second beam body (12) are alternately connected to form the installation cavity (121); The vibration testing tool further comprises a column (5) extending towards the battery pack and suitable for abutting against the battery pack, wherein the column (5) is connected to the first beam (11) and / or the second beam (12).

12. The vibration testing tool according to claim 11, characterized in that: The second beam body (12) has a groove body (122) suitable for accommodating the battery pack, the column body (5) is connected to the first beam body (11), and the end surface of the column body (5) facing the battery pack is coplanar with the bottom surface of the groove body (122).

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