Battery pack vibration testing device

Abstract

This utility model belongs to the field of battery testing technology and discloses a battery pack vibration testing device. The battery pack vibration testing device includes a vibration table, a vibration fixture, and a temperature sensor. The vibration table surface can generate vibration; the vibration fixture is fixed to the vibration table, and the battery pack to be tested can be fixed to the vibration fixture; the temperature sensor is located at the pressure relief channel of the battery pack and is communicatively connected to the vibration table. This battery pack vibration testing device does not rely on the battery pack's own temperature control system, and can react immediately upon battery pack failure during the test, avoiding safety accidents, and recording the initial temperature variation values.

Description

Technical Field

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

[0002] Battery packs require vibration testing to determine critical points under extreme conditions, typically achieved using a vibration table. This vibration table induces battery pack failure. Currently, in testing new energy vehicle power batteries, vibration monitoring parameters are based on fundamental parameters such as acceleration, displacement, direction, spectral density, and swept-frequency waveforms. Existing testing equipment relies on internal temperature sensors within the battery pack, working in conjunction with the battery management system (BMS). During testing, the BMS records data until the battery pack completely fails, which can easily lead to safety accidents, posing a certain danger to operators. Furthermore, during testing, it is often necessary to know the values ​​at the initial stage of temperature variation (e.g., acceleration, amplitude), not the data at the point of complete battery pack failure, which current solutions cannot acquire. Connecting the internal temperature sensors of the battery pack to the vibration platform would require wiring from inside the battery pack to the outside, compromising its airtightness, which is unacceptable during vibration testing.

[0003] Therefore, there is an urgent need to design a battery pack vibration testing device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a battery pack vibration testing device that does not rely on the battery pack's own temperature control system. During the testing process, it can react immediately upon battery pack failure to avoid safety accidents and record the initial temperature variation values.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery pack vibration testing device, comprising:

[0007] A vibration table, the surface of which can generate vibration;

[0008] The vibration fixture is fixed to the vibration table, and the battery pack can be fixed to the vibration fixture.

[0009] A temperature sensor is installed in the pressure relief channel of the battery pack and is connected in communication with the vibration table.

[0010] As an optional solution, a two-dimensional pressure detection device is provided on the aforementioned platform, and the aforementioned battery pack vibration testing device also includes a high-speed camera, which is used to capture images of the aforementioned battery pack.

[0011] As an alternative, the aforementioned two-dimensional pressure detection device is a surface pressure sensor.

[0012] As an optional solution, the battery pack vibration testing device further includes an acceleration measuring element, which is disposed on the surface of the battery pack and / or the surface of the vibration fixture.

[0013] As an alternative, the aforementioned acceleration measuring device is a piezoelectric sensor or a part that measures acceleration by elastic deformation.

[0014] As an optional solution, two high-speed cameras are set up, with the two high-speed cameras positioned opposite each other.

[0015] As an alternative, the two-dimensional pressure detection device is arranged in a rectangular shape, with the two high-speed cameras positioned diagonally opposite each other.

[0016] As an optional solution, the aforementioned temperature sensor is installed at the pressure relief valve of the battery pack.

[0017] As an optional solution, the vibration table is configured to stop vibrating when the temperature detected by the temperature sensor is higher than a preset temperature or the temperature rise rate exceeds 1℃ / s for more than 3 seconds.

[0018] As an alternative, the vibration table includes a vibration generator and a table surface, with the table surface mounted on the output end of the vibration generator.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention provides a battery pack vibration testing device. The device incorporates an external temperature sensor positioned within the battery pack's pressure relief channel. When the battery pack experiences a loss of control, the pressure relief channel initially relieves pressure, distributing some of the load, making the battery pack appear normal from the outside. However, the temperature sensor, located within the channel, detects abnormal temperature changes, indicating internal failure. The vibration table then stops vibrating, preventing widespread battery pack failure and potential explosions or other safety hazards. Furthermore, because the failure is detected early, the recorded data reflects the initial stage of temperature changes, providing valuable reference for future battery pack performance studies and deployment. Since the temperature sensor is external and electrically connected to the vibration table, it does not affect the battery pack's structure or airtightness, resulting in more reliable test results. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the battery pack and battery pack vibration testing device provided in this embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the two-dimensional pressure detection device and the high-speed camera provided in this embodiment of the utility model.

[0023] In the picture:

[0024] 10. Vibration table; 11. Table surface; 12. Vibration generator;

[0025] 20. Vibration fixture;

[0026] 30. Temperature sensor;

[0027] 40. Two-dimensional pressure detection device; 50. High-speed camera; 60. Accelerometer; 200. Battery pack; Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] 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.

[0031] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0032] This embodiment provides a battery pack vibration testing device that does not rely on the battery pack 200's own temperature control system. During the test, it can react immediately upon battery pack 200 failure, preventing safety accidents, and records the initial temperature fluctuation values. Figure 1 As shown, the battery pack vibration testing device includes a vibration table 10, a vibration fixture 20, and a temperature sensor 30. The table surface 11 of the vibration table 10 can generate vibration; the vibration fixture 20 is fixed to the vibration table 10, and the battery pack 200 to be tested can be fixed on the vibration fixture 20; the temperature sensor 30 is set at the pressure relief channel of the battery pack 200 and is communicatively connected to the vibration table 10.

[0033] The aforementioned battery pack vibration testing device incorporates an external temperature sensor 30, which is positioned within the pressure relief channel of the battery pack 200. When the battery pack 200 experiences a loss of control, the pressure relief channel initially relieves pressure, sharing some of the burden, making the battery pack 200 appear normal from the outside. However, the temperature sensor 30, located within the pressure relief channel, detects abnormal temperature changes, indicating an internal failure of the battery pack 200. The vibration table 10 then stops vibrating to prevent large-scale failure of the battery pack 200 and potential explosions or other safety accidents. Furthermore, because the failure is detected early, the recorded data reflects the initial stage of temperature changes, providing valuable reference for performance studies and future deployment of the battery pack 200. Since the temperature sensor 30 is external and electrically connected to the vibration table 10, it does not affect the structure of the battery pack 200 itself, meaning it does not affect the airtightness of the battery pack 200, resulting in more reliable test results.

[0034] Optionally, such as Figure 1 and Figure 2As shown, a two-dimensional pressure detection device 40 is installed on the platform 11. The battery pack vibration testing device also includes a high-speed camera 50, which is used to capture images of the battery pack 200. It is understood that during the vibration test of the battery pack 200, the two-dimensional pressure detection device 40 generates a cloud map on the terminal device, displaying the pressure distribution of the battery pack 200 in real time. At locations of sudden pressure changes, it indicates a change in the internal structure of the battery pack 200. The external condition of the battery pack 200 can be retrospectively observed by corresponding the time of the sudden pressure change in the cloud map to the recording time of the high-speed camera 50.

[0035] Optionally, the two-dimensional pressure detection device 40 is a surface pressure sensor. Any commercially available surface pressure sensor can be used, such as a surface acoustic wave pressure sensor.

[0036] Optionally, such as Figure 1 As shown, the battery pack vibration testing device also includes an acceleration measuring element 60, which is disposed on the surface of the battery pack 200 and / or the surface of the vibration fixture 20. Through this arrangement, the acceleration data of the battery pack 200 can be obtained in a timely manner. Of course, other data during the battery pack 200 vibration testing process can be obtained by adding other sensors, such as displacement and direction sensors, which will not be elaborated upon here.

[0037] Optionally, the acceleration measuring element 60 is a piezoelectric sensor or a component that measures acceleration by elastic deformation. This is used to obtain acceleration data for the battery pack 200.

[0038] Optionally, two high-speed cameras 50 are provided, positioned opposite each other. This allows for all-around imaging of the battery pack 200's perimeter, providing a comprehensive understanding of any external changes to the battery pack 200.

[0039] Optionally, the two-dimensional pressure detection device 40 is arranged in a rectangle, with two high-speed cameras 50 positioned diagonally opposite each other.

[0040] Optionally, a temperature sensor 30 is provided at the pressure relief valve of the battery pack 200. Compared to a sensor located inside the pressure relief valve, this arrangement positions the temperature sensor 30 closer to the initial failure location of the battery pack 200, resulting in more accurate measurement results.

[0041] Optionally, the vibration table 10 is configured to stop vibrating when the temperature detected by the temperature sensor 30 is higher than a preset temperature or the temperature rise rate exceeds 1℃ / s for more than 3 seconds. In other words, the stopping of the vibration table 10 is affected by two parameters, with the temperature rise rate being an additional consideration, allowing for more comprehensive monitoring of abnormal conditions inside the battery pack. Optionally, the preset temperature range is 60℃-100℃. For example, the preset temperature can be 60℃, 65℃, 70℃, 75℃, 80℃, 85℃, 90℃, 95℃, 100℃, etc., and is not limited here.

[0042] Optionally, such as Figure 1 As shown, the vibration table 10 includes a vibration generator 12 and a table surface 11. The table surface 11 is mounted on the output end of the vibration generator 12 to change the amplitude of the table surface 11 for testing under different conditions. The working principle of the vibration generator 12 is existing technology and will not be described in detail here.

[0043] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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 battery pack vibration testing device, characterized in that, include: A vibration table (10), the table surface (11) of which can generate vibration; A vibration fixture (20) is fixed to the vibration table (10), and a battery pack (200) can be fixed to the vibration fixture (20); A temperature sensor (30) is located at the pressure relief channel of the battery pack (200) and is communicatively connected to the vibration table (10).

2. The battery pack vibration testing device according to claim 1, characterized in that, A two-dimensional pressure detection device (40) is provided on the platform (11), and the battery pack vibration testing device also includes a high-speed camera (50), which is used to capture images of the battery pack (200).

3. The battery pack vibration test apparatus according to claim 2, characterized by, The two-dimensional pressure detection device (40) is a surface pressure sensor.

4. The battery pack vibration test apparatus according to claim 2, characterized by, The battery pack vibration testing device further includes an acceleration measuring element (60), which is disposed on the surface of the battery pack (200) and / or the surface of the vibration fixture (20).

5. The battery pack vibration testing device according to claim 4, characterized in that, The acceleration measuring element (60) is a piezoelectric sensor or a part that measures acceleration by elastic deformation.

6. The battery pack vibration test apparatus of claim 2, wherein Two high-speed cameras (50) are provided, and the two high-speed cameras (50) are arranged opposite each other.

7. The battery pack vibration test apparatus according to claim 6, wherein The two-dimensional pressure detection device (40) is arranged in a rectangular shape, and the two high-speed cameras (50) are located at opposite corners of the two-dimensional pressure detection device (40).

8. The battery pack vibration test apparatus according to any one of claims 1 to 6, characterized by, The temperature sensor (30) is located at the pressure relief valve of the battery pack (200).

9. The battery pack vibration test apparatus according to any one of claims 1 to 6, characterized by, The vibration table (10) is configured to stop vibrating when the temperature detected by the temperature sensor (30) is higher than a preset temperature or the temperature rise rate exceeds 1℃ / s for more than 3s.

10. The battery pack vibration test apparatus according to any one of claims 1 to 6, characterized by The vibration table (10) includes a vibration generator (12) and a table surface (11), with the table surface (11) mounted on the output end of the vibration generator (12).

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