Vibration test clamping device and vibration test system

Abstract

The utility model belongs to battery manufacturing technical field discloses a kind of vibration test clamping devices and vibration test system, the vibration test clamping device includes bottom plate and clamping mechanism. Bottom plate is configured to be connected with the output end of vibration output device, buffer is provided on bottom plate, and buffer is used to support measured object;Clamping mechanism is set on bottom plate, including multiple flexible clamping pieces, multiple flexible clamping pieces are respectively clamped in the circumferential side of measured object and top, and the compression force between flexible clamping piece and measured object is adjustable, and flexible clamping piece has inflation flow when being impacted. The vibration test clamping device can be attached to the surface of measured object and the compression force is adjustable, which helps to improve the versatility and eliminate stress concentration, effectively improve the accuracy and reliability of test structure.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a vibration testing clamping device and a vibration testing system. Background Technology

[0002] Battery vibration testing is a crucial step in verifying the safety and reliability of batteries in vehicle use. The test simulates various vibration environments that a vehicle may encounter while driving, in order to verify the structural strength of the battery, the stability of the connectors, and the fatigue resistance of the internal components, thereby preventing dangerous accidents such as battery leakage, fire, or explosion.

[0003] Currently, battery pack vibration testing typically uses rigid clamps to directly fasten the battery pack to the vibration table. This method has the following drawbacks: 1. Stress concentration: Rigid connections create significant stress concentration at the battery pack's mounting points (such as threaded holes), causing damage to the outer casing or internal structure of the battery pack in the early stages of testing, leading to inaccurate results. 2. Inconsistency with real-world conditions: In actual transportation, battery packs usually have some buffering and constraint, rather than being completely rigidly fixed. Direct rigid clamping cannot accurately simulate the actual stress state, affecting the accuracy and reliability of the test results. 3. Poor versatility and compatibility: Different models and sizes of battery packs require specially designed rigid clamps, resulting in poor versatility and high maintenance costs.

[0004] Therefore, there is an urgent need for a vibration testing clamping device and a vibration testing system to solve the above problems. Utility Model Content

[0005] According to one aspect of the present invention, a vibration testing clamping device is provided, which can conform to the surface of the object to be tested and has an adjustable clamping force, which helps to improve versatility and eliminate stress concentration, and effectively improves the accuracy and reliability of the test structure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Vibration testing clamping device, including:

[0008] A base plate is configured to be connected to the output end of a vibration output device, and a buffer is provided on the base plate to support the object to be tested.

[0009] The clamping mechanism, disposed on the base plate, includes multiple flexible clamping members, which respectively clamp the periphery and top of the object to be tested. The clamping force between the flexible clamping members and the object to be tested is adjustable, and the flexible clamping members exhibit expansion flow when subjected to impact.

[0010] Optionally, the flexible clamping member includes a flexible airbag filled with a shear-thickening fluid.

[0011] Optionally, the vibration test clamping device further includes a pumping mechanism and a delivery pipeline, wherein the pumping mechanism injects the shear-thickening fluid into the flexible airbag through the delivery pipeline.

[0012] Optionally, the vibration test clamping device further includes a control valve, which is installed on the delivery pipeline and used to control the on / off state of the delivery pipeline.

[0013] Optionally, the vibration test clamping device further includes a control mechanism and a pressure detection element. The pressure detection element is disposed in the delivery pipeline and configured to detect the pressure in the delivery pipeline. The control mechanism is communicatively connected to the pumping mechanism and the pressure detection element.

[0014] Optionally, the clamping mechanism further includes a plurality of side clamping members disposed on the base plate. The plurality of side clamping members are sequentially arranged around the circumference of the object to be measured, and each side clamping member has a flexible clamping member on its side facing the object to be measured; and / or,

[0015] The clamping mechanism further includes a top pressing member, which is connected to the top of the plurality of side clamping members, and the flexible clamping member is provided at the bottom of the top pressing member.

[0016] Optionally, the side clamping member includes a side plate and a first mounting plate, the first mounting plate is adjustablely disposed on the base plate, the side plate is disposed on the first mounting plate, and the flexible clamping member is disposed on the side of the side plate facing the object to be measured.

[0017] Optionally, the side clamping member further includes a reinforcing plate, which is connected between the side of the side plate facing away from the object to be tested and the first mounting plate.

[0018] Optionally, the side clamping member further includes a second mounting plate, which is disposed at one end of the side plate opposite to the first mounting plate, and the second mounting plate is connected to the top pressing member.

[0019] According to another aspect of the present invention, a vibration testing system is provided, the vibration testing system comprising a vibration output device, a vibration testing platform, and a vibration testing clamping device as described in any one of the above, wherein the base plate is disposed on the vibration testing platform, and the output end of the vibration output device is connected to the vibration testing platform.

[0020] The beneficial effects of this utility model are:

[0021] The vibration testing clamping device provided by this utility model includes a base plate and a clamping mechanism. The base plate is connected to the output end of the vibration output device to transmit vibration. A buffer is provided on the base plate to support the object under test, providing a placement position and buffering / damping during vibration testing. The clamping mechanism is located on the base plate and includes multiple flexible clamping elements, which clamp the peripheral and top portions of the object under test. By using multiple flexible clamping elements, the object under test is clamped and fixed during vibration testing, preventing displacement. The clamping force between the flexible clamping elements and the object under test is adjustable. The flexible clamping elements can conform to the surface of the object under test, distributing pressure evenly, which helps improve versatility and eliminate stress concentration. Simultaneously, the flexible clamping elements exhibit dilatational flow under impact; that is, the flexible clamping elements have good flowability at low shear rates, and their viscosity increases by orders of magnitude after reaching the critical shear rate (under impact), gradually returning to their initial flow state after the external force is removed. This flexible clamping component can maintain flexibility under normal vibration and instantly become rigid under severe impact, thereby effectively improving the accuracy and reliability of the test structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the vibration testing clamping device provided in this embodiment of the utility model;

[0024] Figure 2 This is a partial structural schematic diagram of the vibration testing clamping device provided in this embodiment of the utility model;

[0025] Figure 3 This is a partial exploded view of the vibration testing clamping device provided in this embodiment of the utility model;

[0026] Figure 4 This is a structural schematic diagram of the side clamping member and the flexible clamping member provided in the embodiment of this utility model;

[0027] Figure 5 This is an exploded view of the side clamping member and the flexible clamping member provided in the embodiment of this utility model.

[0028] In the picture:

[0029] 100. The object to be tested;

[0030] 1. Base plate; 11. Buffer components;

[0031] 2. Clamping mechanism; 21. Flexible clamping component; 22. Side clamping component; 221. Side plate; 222. First mounting plate; 223. Reinforcing plate; 224. Second mounting plate; 23. Top pressing component; 231. Top plate; 232. Handle;

[0032] 31. Delivery pipelines;

[0033] 4. Control mechanism. Detailed Implementation

[0034] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this utility model, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] This embodiment provides a vibration testing clamping device that can be used to clamp the object under test during vibration testing. The object under test can be, but is not limited to, a single battery cell or a battery pack. Figures 1-3 As shown, the vibration test clamping device includes a base plate 1 and a clamping mechanism 2.

[0044] The base plate 1 is connected to the output end of the vibration output device, thereby enabling vibration transmission. A buffer 11 is provided on the base plate 1 to support the object 100 to be tested. The buffer 11 provides a placement position for the object 100 and has a buffering and shock-absorbing function during vibration testing. In this embodiment, the buffer 11 can be made of high-density foam or urethane adhesive, etc.

[0045] Continuing, the clamping mechanism 2 is mounted on the base plate 1. The clamping mechanism 2 includes multiple flexible clamping elements 21, which clamp the peripheral and top portions of the object under test 100, respectively. By using multiple flexible clamping elements 21, the object under test 100 can be clamped and fixed during vibration testing, preventing displacement. The clamping force between the flexible clamping elements 21 and the object under test 100 is adjustable. The flexible clamping elements 21 can conform to the surface of the object under test 100, distributing pressure evenly, which helps improve versatility and eliminate stress concentration. Simultaneously, the flexible clamping elements 21 exhibit dilatational flow under impact, meaning they have the characteristic of "good flowability at low shear rates, viscosity increasing by orders of magnitude after reaching the critical shear rate (under impact), and gradually returning to the initial flow state after the external force is removed." This flexible clamping element 21 achieves the technical effect of maintaining flexibility under normal vibration and instantaneously becoming rigid under severe impact, thereby effectively improving the accuracy and reliability of the test structure.

[0046] Specifically, refer to Figure 3 The flexible clamping component 21 includes a flexible airbag filled with a shear-thickening fluid. This shear-thickening fluid refers to a fluid whose viscosity increases by an order of magnitude with increasing shear rate or shear stress; specifically, it can be a non-Newtonian fluid. Utilizing the properties of this shear-thickening fluid, the flexible clamping component 21 can maintain flexible constraint under normal vibration and instantly harden to provide stronger support when encountering severe impacts, realistically simulating the dynamic response of the test object 100 (such as a battery pack) in a complex transportation environment.

[0047] In this embodiment, the medium inside the flexible clamp 21 is a non-Newtonian fluid, which is used as an example for explanation.

[0048] Of course, in other embodiments, the flexible clamping member 21 can also be filled with hydraulic oil or other substances, which can also provide flexible constraint on the object to be tested 100 and play a buffering and protective role when it encounters an impact.

[0049] Optionally, continue to refer to Figures 1-3 The clamping mechanism 2 also includes multiple side clamping members 22. The side clamping members 22 are disposed on the base plate 1, and are sequentially arranged around the circumference of the object to be measured 100. Each side clamping member 22 has a flexible clamping member 21 on its side facing the object to be measured 100. In other words, the side clamping members 22 provide mounting support for the flexible clamping members 21, ensuring the installation stability and clamping reliability of the flexible clamping members 21.

[0050] Meanwhile, the clamping mechanism 2 also includes a top pressing member 23. The top pressing member 23 is connected to the top of the multiple side clamping members 22, and a flexible clamping member 21 is provided at the bottom of the top pressing member 23. The top pressing member 23 can press against the upper surface of the object to be tested 100, preventing the object to be tested 100 from being knocked out of the vibration test clamping device by impact. Exemplarily, the top pressing member 23 includes a top plate 231 and a handle 232. The flexible clamping member 21 is provided on the bottom surface of the top plate 231, and the handle 232 is provided on the top surface of the top plate 231 to facilitate the operator to pick up and put down the object.

[0051] Specifically, such as Figure 4 and Figure 5 As shown, the side clamping member 22 includes a side plate 221 and a first mounting plate 222. The first mounting plate 222 is adjustablely positioned on the base plate 1, the side plate 221 is mounted on the first mounting plate 222, and the flexible clamping member 21 is positioned on the side of the side plate 221 facing the object 100 to be measured. In this embodiment, the first mounting plate 222 and the side plate 221 surround the circumference of the object 100 to be measured, and four of each are provided. The first mounting plate 222 and the side plate 221 correspond one-to-one and are vertically connected. The first mounting plate 222 enables a reliable connection between the side plate 221 and the base plate 1, and the side plate 221 enables stable clamping of the object 100 to be measured. Each of the four first mounting plates 222 has a slotted hole. Bolts and other fasteners pass through the slotted holes and are screwed to the base plate 1. The fasteners can slide along the length of the slotted hole. By using the waist-shaped hole on the first mounting plate 222 and the fastener, the position of the first mounting plate 222 on the base plate 1 can be adjusted, thereby enabling the clamping of objects 100 of different sizes and specifications, which helps to improve the versatility of the clamping mechanism 2.

[0052] More specifically, the side clamping member 22 also includes a reinforcing plate 223. The reinforcing plate 223 is connected between the side plate 221 on the side facing away from the object 100 and the first mounting plate 222. The reinforcing plate 223 can strengthen the connection between the side plate 221 and the first mounting plate 222 on the side of the side plate 221 facing away from the object 100, thereby effectively ensuring the overall strength of the clamping mechanism 2 and improving the safety of use.

[0053] More specifically, the side clamping member 22 also includes a second mounting plate 224. The second mounting plate 224 is disposed at the end of the side plate 221 opposite to the first mounting plate 222, and the second mounting plate 224 is connected to the top pressing member 23. In this embodiment, the second mounting plate 224 is provided on any two or four opposite side plates 221. Through the second mounting plate 224, a reliable connection between the side plate 221 and the top plate 231 can be achieved, thereby ensuring the smooth conduct of vibration testing.

[0054] Optionally, continue to refer to Figure 1 The vibration testing clamping device also includes a pumping mechanism (not shown) and a delivery line 31. The pumping mechanism injects the aforementioned shear-thickening fluid into the flexible airbag through the delivery line 31. The pumping mechanism can control the non-Newtonian fluid injected into the flexible airbag, thereby controlling the pressure between the flexible clamping member 21 and the object under test 100.

[0055] Furthermore, the vibration testing clamping device also includes a control valve. The control valve is installed on the delivery line 31 and is used to control the on / off state of the delivery line 31. For example, the control valve can be a solenoid valve, which has a fast response speed.

[0056] Furthermore, the vibration testing clamping device also includes a control mechanism 4 and a pressure detection element (not shown). The pressure detection element is disposed in the delivery pipeline 31 and configured to detect the pressure in the delivery pipeline 31. The control mechanism 4 is communicatively connected to both the pumping mechanism and the pressure detection element. The control mechanism 4 can control the start and stop of the pumping mechanism based on the pressure signal detected by the pressure detection element, thereby ensuring that the pressure in the delivery pipeline 31 reaches and stabilizes at a preset pressure value. This pressure value has been calculated and verified to be sufficient to fix the object under test 100 without causing deformation of its outer shell. Exemplarily, the pressure detection element is a pressure sensor.

[0057] This embodiment also provides a vibration testing system. The vibration testing system includes a vibration output device, a vibration testing platform, and the vibration testing clamping device provided in this embodiment. A base plate 1 is disposed on the vibration testing platform, and the output end of the vibration output device is connected to the vibration testing platform.

[0058] The operation steps of the vibration testing system provided in this embodiment are as follows:

[0059] Step 1: System preparation and installation of the object to be tested 100.

[0060] 1. Equipment inspection: Check whether the surface of the flexible airbag is intact, whether all pipeline connections are sealed, and whether the power supply of the control mechanism 4 is normal.

[0061] 2. Install the object to be tested 100: Place the object to be tested 100 on the buffer layer of the base plate 1, ensuring that its position is approximately centered.

[0062] Step 2: Adjust the clamping mechanism 2 to the initial position.

[0063] 1. Mechanical positioning: Manually or with the aid of an auxiliary device, move the side clamping member 22 and the top pressing member 23 so that the surface of the flexible clamping member 21 lightly touches or approaches the corresponding surface of the object to be measured 100. (This step is only for rough positioning and no pressure needs to be applied.)

[0064] Step 3: System filling and preset pressure closed-loop control.

[0065] 1. Set target pressure: Input the preset pressure value in control mechanism 4.

[0066] 2. Initiate the filling process:

[0067] (1) Start the pumping mechanism (such as liquid pump / air pump).

[0068] (2) Non-Newtonian fluid / hydraulic oil / gas is pumped into the system, and the flexible airbag begins to inflate.

[0069] (3) The main pipeline pressure sensor monitors the pressure in real time and feeds the data back to the control mechanism 4.

[0070] (4) The control mechanism 4 adjusts the pump and valve precisely to make the system pressure reach and stabilize at the preset pressure value.

[0071] 3. Pre-tightening completed: After the pressure stabilizes, the flexible airbag has tightly adhered to all contact surfaces of the object under test 100 and applied a uniform and flexible initial clamping force.

[0072] Step 4: Switching between system lockout and test mode.

[0073] 1. Close the control valve: Close the control valve on the delivery line 31 to make the entire flexible clamp 21 and delivery line 31 a closed pressure vessel filled with non-Newtonian fluid / liquid / gas.

[0074] 2. Stop pumping mechanism: The pump stops working, and at this time the system officially switches from "active charging mode" to "passive intelligent response test mode".

[0075] Step 5: Perform vibration testing and intelligent response.

[0076] 1. Start the vibration output device: According to the test standard, start the vibration output device to begin simulating transportation vibration.

[0077] 2. Intelligent dynamic response (automatically completed by the system), taking non-Newtonian fluids as an example:

[0078] (1) Normal vibration: Under normal small-amplitude vibration, the fluid shear rate is low, the viscosity is maintained, the flexible airbag is soft, and it provides flexible buffer.

[0079] (2) Encountering impact: When a large amplitude or violent impact occurs, the fluid shear rate increases instantaneously, and the viscosity rises sharply within milliseconds (shear thickening), causing the airbag to harden instantaneously, providing rigid support, limiting the displacement of the object under test by 100°, and absorbing the impact energy.

[0080] (3) Impact ends: The impact disappears, the fluid returns to a low viscosity state, and the system returns to flexible constraints.

[0081] Step 6: End of test and system reset.

[0082] 1. Stop the test: After the vibration test is completed, turn off the vibration output device.

[0083] 2. System pressure relief: The pressure in the delivery pipeline 31 and the flexible airbag is slowly released through the pressure relief valve of the control mechanism 4. The flexible airbag contracts and detaches from the object to be tested 100.

[0084] 3. Remove the test object 100: Remove the side clamp 22 and the top pressing member 23, and remove the test object 100 that has been tested.

[0085] 4. Data storage and analysis: Save the data records of the pressure sensor throughout the entire testing process for subsequent analysis and report generation.

[0086] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vibration testing clamping device, characterized in that, include: The base plate (1) is configured to be connected to the output end of the vibration output device, and a buffer (11) is provided on the base plate (1) for supporting the object to be tested (100). The clamping mechanism (2) is disposed on the base plate (1) and includes multiple flexible clamping members (21). The multiple flexible clamping members (21) are respectively clamped on the periphery and top of the object to be tested (100). The clamping force between the flexible clamping member (21) and the object to be tested (100) is adjustable, and the flexible clamping member (21) has expansion flow when impacted.

2. The vibration testing clamping device according to claim 1, characterized in that, The flexible clamp (21) includes a flexible airbag filled with a shear-thickening fluid.

3. The vibration testing clamping device according to claim 2, characterized in that, The vibration test clamping device also includes a pumping mechanism and a delivery pipeline (31), wherein the pumping mechanism injects the shear thickening fluid into the flexible airbag through the delivery pipeline (31).

4. The vibration testing clamping device according to claim 3, characterized in that, The vibration test clamping device also includes a control valve, which is installed on the delivery pipeline (31) and is used to control the opening and closing of the delivery pipeline (31).

5. The vibration testing clamping device according to claim 3, characterized in that, The vibration test clamping device also includes a control mechanism (4) and a pressure detection element. The pressure detection element is disposed in the delivery pipeline (31) and is configured to detect the pressure in the delivery pipeline (31). The control mechanism (4) is communicatively connected to the pumping mechanism and the pressure detection element respectively.

6. The vibration testing clamping device according to any one of claims 1-5, characterized in that, The clamping mechanism (2) further includes a plurality of side clamping members (22), which are disposed on the base plate (1). The plurality of side clamping members (22) are sequentially disposed around the circumference of the object to be tested (100). Each side clamping member (22) has a flexible clamping member (21) on the side facing the object to be tested (100); and / or, The clamping mechanism (2) further includes a top pressing member (23), which is connected to the top of the plurality of side clamping members (22), and the bottom of the top pressing member (23) is provided with the flexible clamping member (21).

7. The vibration testing clamping device according to claim 6, characterized in that, The side clamping member (22) includes a side plate (221) and a first mounting plate (222). The first mounting plate (222) is positionally adjustable on the base plate (1). The side plate (221) is disposed on the first mounting plate (222). The flexible clamping member (21) is disposed on the side of the side plate (221) facing the object to be tested (100).

8. The vibration testing clamping device according to claim 7, characterized in that, The side clamp (22) also includes a reinforcing plate (223), which is connected between the side plate (221) away from the object to be tested (100) and the first mounting plate (222).

9. The vibration testing clamping device according to claim 7, characterized in that, The side clamping member (22) further includes a second mounting plate (224), which is disposed at one end of the side plate (221) away from the first mounting plate (222), and the second mounting plate (224) is connected to the top pressing member (23).

10. A vibration testing system, characterized in that, It includes a vibration output device, a vibration testing platform, and a vibration testing clamping device as described in any one of claims 1-9, wherein the base plate (1) is disposed on the vibration testing platform, and the output end of the vibration output device is connected to the vibration testing platform.

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