Fuel cell system vibration test device

Abstract

The utility model discloses a vibration test device for a fuel cell system, which comprises a support A, a support B, a support C and a support D. The support A, the support B, the support C and the support D are respectively provided with a suspension support lug, and the suspension support lugs are respectively connected with the support A, the support B, the support C and the support D through connecting assemblies. And the suspension support lugs on the support A, the support B, the support C and the support D are respectively connected with the fuel cell system through connecting pieces. Under the condition of ensuring that the device does not interfere with the fuel cell system, the distances between the holes A in the support A, the support B, the support C and the support D are adjusted, and the distances between the supports are matched with standard connecting holes reserved in a vibration test platform, so that the fuel cell system is fixed; fuel cell systems of different specifications can be connected through the suspension support lugs, and the device has the advantage of repeated use.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery testing, and in particular relates to a vibration testing device for a fuel cell system. Background Art

[0002] During operation, fuel cell vehicles are subject to vibration and impact from the external environment. Prolonged vibration and impact can cause performance degradation and even structural damage to the fuel cell stack. Therefore, vibration is an essential performance requirement for automotive fuel cell systems. However, the industry currently lacks a formally published standard for vibration in automotive fuel cell systems, yet vibration performance is a fundamental technical requirement for automotive components. The vibration requirements of current vibration testing standards still need improvement. For example, the standard does not specify the design and installation requirements for vibration specimens and fixtures. Different vibration fixtures and installation conditions can significantly impact test results.

[0003] Currently, the most commonly used vibration buffering devices are passive vibration control devices. These devices reduce the transmission of noise and vibration through structural optimization and vibration reduction measures. They typically include vibration isolators, dampers, and sound-absorbing materials. Proper selection can effectively reduce vibration caused by movement and improve system stability and operating efficiency. However, the selection of components for fuel cell systems of different power levels varies, mainly reflected in the dimensions, weight, and center of gravity of the stack and various components. The vibration test tooling required for different systems also varies. Currently, most vibration devices are connected to the system frame, which is not only cumbersome to install, but also the frames constructed with profiles have poor vibration resistance and cannot be reused.

[0004] Patent document with announcement number CN214893943U discloses a vibration tooling for a fuel cell system. This patent provides a support column with four reinforcing ribs, which has a higher processing cost and has no vibration reduction buffer device, resulting in poor vibration reduction effect.

[0005] Patent document with announcement number CN214583927U discloses a fuel cell radiator vibration tooling, which is mainly applicable to an external radiator of a fuel cell system and is not suitable for systems with charged stacks and complex components.

[0006] Patent document CN217111385U discloses a fixture for vibration control of fuel cell systems. This patent utilizes linear bearings and sliders. However, linear bearings have limited vibration resistance and are susceptible to damage during long-term vibration tests due to vibration in the X, Y, and Z directions. Utility Model Content

[0007] In order to solve the above technical problems, the utility model provides a fuel cell system vibration test device.

[0008] The utility model is achieved through the following technical solutions.

[0009] The utility model provides a fuel cell system vibration test device, including a support A, a support B, a support C and a support D. The support A, the support B, the support C and the support D are respectively provided with suspension ears, and the suspension ears are respectively connected to the support A, the support B, the support C and the support D through a connecting assembly. The suspension ears on the support A, the support B, the support C and the support D are respectively connected to the fuel cell system through a connecting piece.

[0010] Preferably, the support A includes a fixed seat and a supporting seat, the fixed seat and the supporting seat are connected, a hole A is set on the fixed seat, and the structures of the support B, support C and support D are the same as that of support A.

[0011] Preferably, a hole B is provided on the support seat, the hole B is a countersunk hole, and a screw hole A is provided in the hole B.

[0012] Preferably, the holes A are evenly distributed on the fixing seat, and the spacing between adjacent holes A is the same.

[0013] Preferably, the connecting assembly includes a shock-absorbing pad A, a shock-absorbing pad B, a bolt A and a gasket, the bolt A passes through the gasket, the shock-absorbing pad A and the shock-absorbing pad B from top to bottom, the shock-absorbing pad A is placed on the upper part of the suspension ear, the shock-absorbing pad B is placed on the bottom of the suspension ear, and the gasket is connected to the top of the shock-absorbing pad A.

[0014] Preferably, a screw hole B and a hole C are provided on the suspension lug, and the suspension lug is threadedly connected to the connecting member through the screw hole B. The holes C are symmetrically provided at two locations, and the suspension lug is connected to the connecting component through the holes C.

[0015] Preferably, a connecting portion is provided on the suspension lug, and the connecting portion is provided on both sides of the screw hole B.

[0016] The beneficial effects of the present invention are:

[0017] 1. While ensuring that the device does not interfere with the fuel cell system, adjust the distance between the holes A on the four supports, support A, support B, support C and support D, and the distance between the supports to match the standard connection holes reserved on the vibration test platform, thereby achieving the fixation of the fuel cell system. Fuel cell systems of different specifications can be connected through the suspension lugs, and the device has the advantage of repeated use.

[0018] 2. Installing rubber shock-absorbing pads on the upper and lower sides of the suspension lugs can reduce and cushion the vibration of the fuel cell system in the X, Y, and Z directions. The cushioning effect can be adjusted according to the working conditions by increasing the number or material of the rubber shock-absorbing pads.

[0019] 3. Hole B and screw hole B are opened on the support to limit the displacement of the shock-absorbing pad during vibration. At the same time, the use of bolt A with anti-loosening function can loosen it and facilitate installation and disassembly.

[0020] 4. The utility model adopts a design of limiting support and vibration reduction for the suspension lugs by adopting multiple double-layer embedded rubber vibration-damping pads. The four support parts adopt a right-angle trapezoidal design to improve the support strength and vibration resistance of the device. The semi-threaded bolts A with anti-loosening function are used on the supports with countersunk holes, making the installation simple and reusable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This is a structural diagram of the support A of the utility model;

[0023] Figure 3 This is a schematic structural diagram of the suspension lug and connecting assembly of the utility model;

[0024] In the figure: 1-support A, 101-fixing seat, 102-support seat, 103-hole A, 104-hole B, 105-screw hole A, 2-support B, 3-support C, 4-support D, 5-shock pad A, 6-shock pad B, 7-suspension ear, 701-screw hole B, 702-hole C, 703-connecting part, 8-bolt A, 10-gasket, 11-fuel cell system, 12-connecting part. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the described solution.

[0026] Example:

[0027] like Figures 1 to 3 As shown, a fuel cell system vibration test device includes a support A1, a support B2, a support C3 and a support D4. The support A1, the support B2, the support C3 and the support D4 are respectively provided with a suspension lug 7, and the suspension lug 7 is respectively connected to the support A1, the support B2, the support C3 and the support D4 through a connecting assembly. The suspension lug 7 on the support A1, the support B2, the support C3 and the support D4 is respectively connected to the side of the fuel cell system 11 through a connecting piece 12, thereby supporting the fuel cell system 11. The connecting piece 12 is a bolt.

[0028] The support A1 includes a fixing base 101 and a supporting base 102. The fixing base 101 and the supporting base 102 are connected. A hole A103 is set on the fixing base 101. The structures of the support B2, support C3 and support D4 are the same as those of the support A1.

[0029] The support base 102 is provided with a hole B104 , which is a countersunk hole, and a screw hole A105 is provided in the hole B104 .

[0030] The holes A103 are evenly distributed on the fixing base 101, and the distances between adjacent holes A103 are the same.

[0031] The connection assembly includes a shock-absorbing pad A5, a shock-absorbing pad B6, a bolt A8, and a gasket 10. Bolt A8 passes through gasket 10, shock-absorbing pad A5, and shock-absorbing pad B6 in order from top to bottom. Bolt A8 is threaded into screw hole A105 and is a half-thread bolt. Shock-absorbing pad A5 is positioned above suspension lug 7, while shock-absorbing pad B6 is positioned below it. Gasket 10 is connected to the top of shock-absorbing pad A5, providing further shock absorption. The embedded combination of shock-absorbing pads A5 and B6 provides a vibration-damping and buffering effect. Shock-absorbing pads A5 and B6 are made of rubber.

[0032] The suspension lug 7 is provided with a screw hole B701 and a hole C702. The suspension lug 7 is threadedly connected to the connector 12 via the screw hole B701. The holes C702 are symmetrically located at two locations and are connected to the connector assembly via the countersunk holes C702. A shock-absorbing pad A5 is positioned in the hole C702 at the top of the lug 7 and acts as a position limiter. A shock-absorbing pad B6 is positioned in the hole C702 at the bottom of the lug 7 and acts as a position limiter for the connector 12.

[0033] The suspension lug 7 is provided with a connecting portion 703 , which is provided on both sides of the screw hole B701 for protection.

[0034] Since the table hole size of the vibration table has been determined, the interval between adjacent holes A103 on supports A1, support B2, support C3 and support D4 is 200mm, and the fixed distance between holes A103 on supports A1, support B2, support C3 and support D4 is an integer multiple of 100mm.

[0035] A method for using a fuel cell system vibration test device includes the following steps: connecting a suspension lug 7 to a fuel cell system 11 via a connector 12, connecting the suspension lug 7 to a support A1, a support B2, a support C3, and a support D4 via a connecting assembly, and then respectively fixing the support A1, the support B2, the support C3, and the support D4 to a vibration test platform via corresponding connecting bolts passing through corresponding holes A103, and then starting the vibration test.

Claims

1. A fuel cell system vibration test device, characterized in that: The invention comprises a support A (1), a support B (2), a support C (3) and a support D (4); the support A (1), the support B (2), the support C (3) and the support D (4) are respectively provided with suspension lugs (7); the suspension lugs (7) are respectively connected to the support A (1), the support B (2), the support C (3) and the support D (4) through a connecting assembly; the suspension lugs (7) on the support A (1), the support B (2), the support C (3) and the support D (4) are respectively connected to a fuel cell system (11) through a connecting piece (12).

2. A fuel cell system vibration test device according to claim 1, characterized in that: The support A (1) comprises a fixed seat (101) and a supporting seat (102), wherein the fixed seat (101) and the supporting seat (102) are connected, and a hole A (103) is provided on the fixed seat (101). The structures of the support B (2), the support C (3) and the support D (4) are the same as those of the support A (1).

3. A fuel cell system vibration test device according to claim 2, characterized in that: The support seat (102) is provided with a hole B (104), the hole B (104) is a countersunk hole, and a screw hole A (105) is provided in the hole B (104).

4. A fuel cell system vibration test device according to claim 2, characterized in that: The holes A (103) are evenly distributed on the fixing seat (101), and the spacing between adjacent holes A (103) is the same.

5. The fuel cell system vibration test device according to claim 1, wherein: The connecting assembly comprises a shock-absorbing pad A (5), a shock-absorbing pad B (6), a bolt A (8) and a gasket (10), wherein the bolt A (8) passes through the gasket (10), the shock-absorbing pad A (5) and the shock-absorbing pad B (6) in sequence from top to bottom, the shock-absorbing pad A (5) is placed on the upper part of the suspension lug (7), the shock-absorbing pad B (6) is placed on the bottom of the suspension lug (7), and the gasket (10) is connected to the top of the shock-absorbing pad A (5).

6. A fuel cell system vibration test device according to claim 1, characterized in that: The suspension lug (7) is provided with a screw hole B (701) and a hole C (702), and the suspension lug (7) is threadedly connected to the connecting member (12) through the screw hole B (701). The holes C (702) are symmetrically provided at two locations, and the suspension lug (7) is connected to the connecting assembly through the holes C (702).

7. The fuel cell system vibration test device according to claim 1, characterized in that: The suspension lug (7) is provided with a connecting portion (703), and the connecting portion (703) is provided on both sides of the screw hole B (701).

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