Beam structure for vibration test of battery pack and vibration test device

Abstract

The utility model provides a battery pack vibration test crossbeam structure and a test device, the battery pack vibration test crossbeam structure comprises a crossbeam body, the crossbeam body is internally provided with a cavity penetrating through the axial direction of the crossbeam body, the bottom wall of the cavity is provided with a connecting part used for connecting a battery pack, and the connecting part is provided with a through hole. At least one reinforcing piece extending in the length direction of the cross beam body is arranged in the cavity, the cavity is divided into at least two sub-cavities by the reinforcing piece, and the cross section of at least one sub-cavity is triangular or isosceles trapezoid. According to the crossbeam structure for the vibration test of the battery pack, the weight of the crossbeam structure can be reduced, the strength and rigidity of the crossbeam structure can be improved by utilizing the characteristic that the triangular and isosceles trapezoid structures are high in strength, the risk of failure of the crossbeam structure during the vibration test of the battery pack is reduced, and the reliability of the crossbeam structure is improved. And the reliability of the vibration test of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery testing, and in particular to a crossbeam structure for battery pack vibration testing. The utility model also relates to a vibration testing device provided with the crossbeam structure for battery pack vibration testing. Background Art

[0002] The main purpose of power battery vibration testing is to evaluate the safety, durability and performance stability of the battery in a vibration environment. By simulating the vibration environment that electric vehicles may encounter during driving, the battery is tested to see if there are abnormal sounds, breakage or cracks, thereby ensuring that the battery has good reliability in actual use.

[0003] The methods of power battery vibration testing mainly include fixed vibration and swept frequency vibration. In the fixed vibration test, the battery is fixed on the vibration table and vibrates at a certain frequency and amplitude. In the swept frequency vibration test, the frequency and amplitude of the vibration table will change according to a certain rule to simulate a more complex vibration environment.

[0004] The existing vibration fixtures used for vibration testing of battery packs have problems such as excessive weight or insufficient rigidity, which can easily lead to vibration failure of the battery pack. Especially for battery packs with a central mounting point, the crossbeam in the middle of the vibration fixture is usually made of a rectangular aluminum block, which makes the overall weight of the fixture larger, which is not conducive to reducing production costs. Utility Model Content

[0005] In view of this, the utility model aims to propose a crossbeam structure for vibration testing of a battery pack, so as to facilitate vibration testing of the battery pack, facilitate lightweight setting, and have good structural strength.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A crossbeam structure for vibration testing of a battery pack comprises a crossbeam body, a cavity which is axially arranged through the crossbeam body is formed in the crossbeam body, a connecting portion for connecting the battery pack is provided on the bottom wall of the cavity, at least one reinforcement member extending along the length direction of the crossbeam body is provided in the cavity, the cavity is divided into at least two sub-cavities by the reinforcement member, and the cross-section of at least one of the sub-cavities is triangular or isosceles trapezoidal.

[0008] Furthermore, two reinforcing members are provided between the top wall and the bottom wall of the cavity, and the spacing between the two reinforcing members is gradually reduced in the direction away from the bottom wall; the cross-section of the sub-cavity located between the two reinforcing members is an isosceles trapezoid.

[0009] Furthermore, the bottom of at least one of the reinforcements is connected to the side of the bottom wall, and the cross-section of the sub-cavity formed by the reinforcement, the wall and the side wall is triangular.

[0010] Furthermore, the distance b between the top surfaces of the two reinforcement members is 1 The thickness t of the reinforcement member satisfies: b 1 =1.5*t.

[0011] Furthermore, the tops of the two side walls have a trapezoidal top portion, and the tops of both the reinforcement and the top wall are arranged in accordance with the top portion.

[0012] Furthermore, the length A of the beam body and the length a of the top surface of the top portion 1 Satisfy between:

[0013] a 1 =(0.4-0.5)*A; and / or, the height c of the two ends of the reinforcement 1 The height C of the beam body satisfies: 1 =0.5*C.

[0014] Furthermore, the length A of the beam body and the distance a between the two ends of the reinforcement and the same end as the bottom wall are 2 Between: a 2 =(0.05-0.1)*A; and / or, the length A of the beam body, the width B of the beam body and the height C of the beam body satisfy: B=0.1*A, C=1.5*B.

[0015] Furthermore, the top wall is welded to the two side walls, and the distance c between the top surface of the top wall and the top surface of each side wall is 2 , and the thickness t of the top wall satisfies: c 2 = t; and / or,

[0016] The length A of the beam body and the width D of the battery pack satisfy: A=1.25*D.

[0017] Further, the connecting portion includes a plurality of first connecting holes provided on the bottom wall; and / or,

[0018] The bottom wall is provided with a plurality of second connection holes for connecting with the vibration test bench.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The crossbeam structure for vibration testing of a battery pack described in the utility model is beneficial to reducing the weight of the crossbeam structure and thus reducing production costs by arranging a cavity in the crossbeam body, and by arranging at least one reinforcement member in the air, and the cavity is divided into at least two sub-cavities by the reinforcement member, and the cross-section of at least one of the sub-cavities is triangular or isosceles trapezoidal, which can utilize the high strength characteristics of the triangular and isosceles trapezoidal structures, thereby facilitating improving the strength and rigidity of the crossbeam structure and reducing the risk of failure of the crossbeam structure during vibration testing of the battery pack, thereby facilitating the effect of the vibration testing of the battery pack.

[0021] In addition, the cross section of the sub-cavity between the two reinforcements is an isosceles trapezoid, which has the advantages of simple structure, easy layout and implementation, and good rigidity and strength improvement effect. The sub-cavity with a triangular cross section formed between at least one reinforcement and the bottom wall and the side wall also has the advantages of easy layout and implementation, and good strength improvement effect. The setting of the relationship between the spacing between the top surfaces of the two reinforcements and the thickness of the reinforcements is conducive to reducing the weight of the beam body while meeting the strength requirements. By setting a trapezoidal top part on the top of the side wall, and the top of the reinforcement and the top wall are both set in the shape of the top part, the use effect of the beam body is improved by utilizing the characteristics of the trapezoidal shape with good structural strength.

[0022] In addition, the length A of the beam body and the length a of the top surface of the top part 1 The relationship between them is set to ensure the strength of the beam while reducing the use of materials. 1 The setting of the relationship between the height C of the beam body is conducive to improving the installation effect of the reinforcement. The top wall is welded to the two side walls, and the setting of the relationship between the spacing c2 between the top surface of the top wall and the top surface of each side wall and the thickness t of the top wall is conducive to further improving the welding strength between the top wall and the two side walls. The structure of the first connecting hole is simple, easy to form, and the installation of the battery pack on the bottom wall; the second connecting hole on the bottom wall is used to connect to the vibration test bench, which is also conducive to the installation of the beam body on the vibration test bench.

[0023] In addition, another object of the present invention is to provide a vibration testing device, including a vibration testing table, and the above-mentioned crossbeam structure for vibration testing of a battery pack arranged on the vibration testing table.

[0024] The vibration test device described in the utility model is conducive to lightweight setting by arranging the above-mentioned beam structure on the vibration test table, which can reduce production costs and improve the reliability of battery pack vibration testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of the crossbeam structure for battery pack vibration test according to an embodiment of the utility model at one viewing angle;

[0027] Figure 2 It is a structural schematic diagram of the crossbeam structure for battery pack vibration test according to an embodiment of the utility model at another viewing angle;

[0028] Figure 3 This is a schematic diagram of the internal structure of the beam structure for battery pack vibration testing according to an embodiment of the utility model;

[0029] Figure 4 A side view of the crossbeam structure for battery pack vibration testing according to an embodiment of the utility model;

[0030] Figure 5 for Figure 4 AA direction section view;

[0031] Figure 6 It is a left view of the crossbeam structure for battery pack vibration testing according to an embodiment of the utility model.

[0032] Description of reference numerals:

[0033] 1. Bottom wall; 2. Side wall; 3. Top wall; 4. Reinforcement member;

[0034] 101, second connection hole; 102, first connection hole;

[0035] 201. Top part. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] The present embodiment relates to a crossbeam structure for vibration testing of a battery pack. In terms of overall structure, it includes a crossbeam body, a cavity which is axially arranged through the crossbeam body, a connecting portion for connecting the battery pack is provided on the bottom wall 1 of the cavity, and at least one reinforcement member 4 extending along the length direction of the crossbeam body is provided in the cavity. The cavity is divided into at least two sub-cavities by the reinforcement member 4, and the cross-section of at least one of the sub-cavities is triangular or isosceles trapezoidal.

[0040] The crossbeam structure for vibration testing of the battery pack described in the present embodiment is beneficial to reducing the weight of the crossbeam structure and thus reducing production costs by providing a cavity in the crossbeam body, and by providing at least one reinforcement member 4 in the air, and the cavity is divided into at least two sub-cavities by the reinforcement member 4, and the cross-section of at least one of the sub-cavities is triangular or isosceles trapezoidal, which can utilize the high strength characteristics of the triangular and isosceles trapezoidal structures, thereby facilitating improving the strength and rigidity of the crossbeam structure and reducing the risk of failure of the crossbeam structure during vibration testing of the battery pack, thereby facilitating the effect of the vibration testing of the battery pack.

[0041] Based on the above overall introduction, an exemplary structure of the beam structure described in this embodiment is as follows: Figures 1 to 3 As shown in . As a preferred embodiment, two reinforcement members 4 are provided between the top wall 3 and the bottom wall 1 of the cavity, and the spacing between the two reinforcement members 4 is gradually reduced in the direction away from the bottom wall 1, and the cross section of the sub-cavity between the two reinforcement members 4 is an isosceles trapezoid. Among them, the reinforcement member 4 is in the shape of a plate, and its structure is simple and easy to process and form. The cross section of the sub-cavity between the two reinforcement members 4 is an isosceles trapezoid, which has the advantages of simple structure, easy layout and implementation, and good rigidity and strength improvement effect.

[0042] like Figure 3 and Figure 5 As shown in the figure, in this embodiment, the bottoms of the two reinforcement members 4 are connected to the side of the bottom wall 1, and the cross section of the sub-cavity formed by the reinforcement members 4, the bottom wall 1 and the side wall 2 is triangular. Such a setting is conducive to forming a sub-cavity with a triangular cross section, and also has the advantages of being easy to arrange and implement, and having a good strength improvement effect.

[0043] Preferably, the cross section of the sub-cavity between the two reinforcement members 4 is an isosceles trapezoid, and the cross section of the sub-cavity outside the reinforcement member 4 is a triangle. The two sub-cavities with triangular cross sections are located on the left and right sides of the sub-cavity with an isosceles trapezoidal cross section, and the three sub-cavities cooperate to improve the strength and rigidity of the beam structure.

[0044] It should be noted that in this embodiment, it is also feasible that only one of the two reinforcement members 4 can form a triangle with the bottom wall 1 and the side wall 2. In addition, the number of reinforcement members 4 can be two as shown above, and can also be adaptively increased or decreased according to usage requirements.

[0045] In this embodiment, the bottom wall 1 is welded to the side walls 2 and the reinforcement 4, the top wall 3 is welded to the tops of the two side walls 2, and the top of the reinforcement 4 is also welded to the top wall 3. Such a configuration is conducive to the processing and forming of the crossbeam body and is conducive to reducing production costs. Of course, the solution of integrally forming the bottom wall 1 and the two side walls 2 in this embodiment is also feasible.

[0046] As a preferred embodiment, in this embodiment, the top of the two side walls 2 has a trapezoidal top portion 201, and the tops of the reinforcement member 4 and the top wall 3 are both arranged in the shape of the top portion 201. Here, by arranging the trapezoidal top portion 201 on the top of the side wall 2, and the tops of the reinforcement member 4 and the top wall 3 are both arranged in the shape of the top portion 201, the trapezoidal shape has the characteristic of good structural strength, the use effect of the beam body is improved, and at the same time, it is also beneficial to reduce the weight of the beam body.

[0047] In specific implementation, the side wall 2, the bottom wall 1, the top wall 3 and the reinforcement 4 have the same thickness. Preferably, the thickness value can be 15 to 25 mm, which can help ensure the structural strength of the beam body and reduce the overall weight. For example, the thickness value can be 15 mm, 20 mm or 25 mm. This can prevent the problem of poor strength caused by a thickness value lower than 15 mm and the problem of heavy weight of the beam body caused by a thickness value greater than 25 mm.

[0048] like Figures 4 to 6 As shown in FIG. , the distance b between the top surfaces of the two reinforcement members 4 is 1 The thickness t of the reinforcement member 4 satisfies: b 1 =1.5*t. The setting of the relationship between the distance between the top surfaces of the two reinforcement members 4 and the thickness of the reinforcement members 4 is conducive to reducing the weight of the beam body while meeting the strength requirements.

[0049] In addition, the length A of the beam body and the length a of the top surface of the top portion 201 are 1 Between: a 1 =(0.4~0.5)*A; height c of both ends of reinforcement 4 1 The height C of the beam body satisfies: c 1 =0.5*C. By setting the length A of the beam body and the length a of the top surface of the top part 201 1 The relationship between them is conducive to reducing the use of materials while ensuring the strength of the beam itself.

[0050] In this embodiment, Figure 5 As shown in FIG. 1 , the length A of the beam body, the distance a between the two ends of the reinforcement 4 and the same end as the bottom wall 1 2 Between: a 2 =(0.05~0.1)*A; the length A of the beam body, the width B of the beam body and the height C of the beam body satisfy: B=0.1*A, C=1.5*B.

[0051] In addition, the distance c between the top surface of the top wall 3 and the top surface of each side wall 2 is 2 , and the thickness t of the top wall 3 satisfies: c 2 =t; the length A of the beam body and the width D of the battery pack satisfy: A=1.25*D.

[0052] In this embodiment, the height c of the two ends of the reinforcement member 4 is 1 The setting of the relationship between the height C of the cross beam body is conducive to improving the installation effect of the reinforcement member 4. The spacing c between the top surface of the top wall 3 and the top surface of each side wall 2 2 , and the setting of the relationship between the thickness t of the top wall 3 is conducive to further improving the welding strength between the top wall 3 and the two side walls 2.

[0053] like Figures 1 to 3 As shown in , the connection portion in this embodiment includes a plurality of first connection holes 102 provided on the bottom wall 1, and a plurality of second connection holes 101 for connecting to the vibration test bench are provided on the bottom wall 1. The first connection holes 102 have a simple structure and are easy to form and install the battery pack on the bottom wall 1; the second connection holes 101 on the bottom wall 1 are used to connect to the vibration test bench, which is also conducive to the installation of the crossbeam body on the vibration test bench.

[0054] When the beam structure in this embodiment is in use, the top of the battery pack is connected to the beam body through the first connecting hole 102, and the two ends of the beam body are installed on the vibration test bench through the second connecting hole 101, so that the battery pack can be vibration tested with good test reliability.

[0055] In addition, the present embodiment also relates to a vibration testing device, including a vibration testing table, and the above-mentioned crossbeam structure for vibration testing of a battery pack arranged on the vibration testing table.

[0056] The vibration testing device described in this embodiment, by setting the above-mentioned crossbeam structure on the vibration testing table, is conducive to lightweight setting, which can reduce production costs and also help improve the reliability of battery pack vibration testing.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A beam structure for battery pack vibration testing, characterized in that: It includes a beam body, in which a cavity is formed that runs through the beam body axially, a connecting portion for connecting the battery pack is provided on the bottom wall of the cavity, and at least one reinforcement member extending along the length direction of the beam body is provided in the cavity, and the cavity is divided into at least two sub-cavities by the reinforcement member, and the cross-section of at least one of the sub-cavities is triangular or isosceles trapezoidal.

2. The crossbeam structure for battery pack vibration testing according to claim 1, characterized in that: Two reinforcement members are provided between the top wall and the bottom wall of the cavity, and the distance between the two reinforcement members is gradually reduced in the direction away from the bottom wall; The cross section of the sub-cavity between the two reinforcement members is in the shape of an isosceles trapezoid.

3. The crossbeam structure for battery pack vibration testing according to claim 2, characterized in that: The bottom of at least one of the reinforcements is connected to the side of the bottom wall, and the cross section of the sub-cavity formed by the reinforcement, the top wall and the side wall of the cavity is triangular.

4. The crossbeam structure for battery pack vibration testing according to claim 2, characterized in that: The spacing b1 between the top surfaces of the two reinforcement members and the thickness t of the reinforcement member satisfy: b1=1.5*t.

5. The crossbeam structure for battery pack vibration testing according to claim 2, characterized in that: The tops of the two side walls of the cavity have a trapezoidal top portion, and the tops of both the reinforcement member and the top wall are arranged in accordance with the top portion.

6. The crossbeam structure for battery pack vibration testing according to claim 5, characterized in that: The length A of the beam body and the length a1 of the top surface of the top portion satisfy: a1=(0.4~0.5)*A;and / or, The height c1 of the two ends of the reinforcement and the height C of the beam body satisfy: c1=0.5*C.

7. The crossbeam structure for battery pack vibration testing according to claim 1, characterized in that: The length A of the cross beam body and the distance a2 between the two ends of the reinforcement and the same end as the bottom wall satisfy: a2 = (0.05-0.1) * A; and / or, The length A of the beam body, the width B of the beam body and the height C of the beam body satisfy: B=0.1*A, C=1.5*B.

8. The crossbeam structure for battery pack vibration testing according to claim 2, characterized in that: The top wall is welded to the two side walls of the cavity, and the distance c2 between the top surface of the top wall and the top surfaces of the side walls satisfies the following relationship with the thickness t of the top wall: c2=t; and / or, The length A of the beam body and the width D of the battery pack satisfy: A=1.25*D.

9. The crossbeam structure for battery pack vibration testing according to any one of claims 1 to 8, characterized in that: The connecting portion includes a plurality of first connecting holes provided on the bottom wall; and / or, The bottom wall is provided with a plurality of second connection holes for connecting with the vibration test bench.

10. A vibration testing device, characterized in that: It comprises a vibration test bench and a crossbeam structure for vibration testing of a battery pack according to any one of claims 1 to 9, which is arranged on the vibration test bench.

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