Sealing detection device for battery tray of new energy automobile

Abstract

The invention discloses a sealing detection device for a battery tray of a new energy automobile, and relates to the technical field of sealing detection. A sealing detection device for a new energy automobile battery tray comprises a bearing table, and the bearing table is provided with a pressing mechanism. The bearing table is provided with a separation mechanism, after the tray is placed on the bearing table, the separation mechanism can divide the space in the tray into a plurality of ventilation areas, and the bearing table is provided with a pressure detection part and an air inlet part corresponding to each ventilation area; a power piece, a detection mechanism and a liquid spraying mechanism are arranged on one side of the bearing table, and the detection mechanism and the liquid spraying mechanism are both connected to the power piece; the sealing detection device of the new energy automobile battery tray further comprises a control module and a power piece, the liquid spraying mechanism and the pressure detection piece are both connected to the control module, and the control module responds to a detection signal of the pressure detection piece to control the liquid spraying mechanism and the power piece to work. The leakage point position of the tray can be reliably determined on the basis of not influencing the subsequent use of the tray.

Description

Technical Field

[0001] This application relates to the technical field of sealing test, and in particular to a sealing test device for a battery tray of a new energy vehicle. Background Technology

[0002] As the core carrier of green transportation, the safety performance of new energy vehicles directly depends on the operational stability of the battery pack. The battery tray, as the core load-bearing and protective structure of the battery pack, must not only withstand the weight of the battery modules but also possess excellent sealing performance to prevent external moisture, dust, and impurities from intruding into the tray, thus avoiding safety hazards such as battery short circuits, corrosion, and thermal runaway. Therefore, sealing performance testing is an indispensable and critical process in the battery tray manufacturing process before the tray leaves the factory.

[0003] Currently, the sealing testing methods for new energy vehicle battery trays are mainly divided into two categories: air tightness testing and liquid tightness testing. The core principle of air tightness testing is to fill the workpiece under test with gas at a certain pressure and determine whether there is a leak by detecting changes in gas pressure, flow rate difference, or concentration. Liquid tightness testing, also known as water immersion testing, involves filling the workpiece under test with gas and immersing it in water, and determining the leakage situation by observing whether bubbles are generated in the water.

[0004] For airtightness testing, it can only determine whether the tray is leaking, but cannot directly determine the specific leak point. For defective products with leaks, a lot of extra time needs to be spent checking them one by one. For liquid tightness testing, it is not sensitive enough to minor leaks. When the defect is extremely small, the bubbles generated in the water are small in size and rise slowly. The bubbles are easily confused with impurities and bubbles in the water, making it difficult to accurately identify them by visual observation, thus leading to missed detections. In addition, the surface of the tray is prone to residual moisture after being immersed in water. If it is not dried sufficiently, it will lead to problems such as rust, weld oxidation and battery operation in subsequent processes.

[0005] Therefore, how to reliably determine the location of a pallet leak without affecting its subsequent use is an urgent problem to be solved. Summary of the Invention

[0006] In order to reliably determine the location of a tray leak without affecting its subsequent use, this application provides a sealing detection device for a new energy vehicle battery tray.

[0007] The sealing detection device for a new energy vehicle battery tray provided in this application adopts the following technical solution: A sealing detection device for a new energy vehicle battery tray includes a support platform, on which a pressing mechanism is installed; the support platform is provided with a dividing mechanism, which can divide the space inside the tray into multiple ventilation areas after the tray is placed on the support platform; and a pressure detection element and an air inlet element are provided on the support platform corresponding to each ventilation area. The support platform is equipped with a power component, a detection mechanism, and a liquid spraying mechanism on one side, and the detection mechanism and the liquid spraying mechanism are both connected to the power component; A sealing detection device for a new energy vehicle battery tray further includes a control module. The power component, the liquid spraying mechanism, and the pressure detection component are all connected to the control module. The control module controls the operation of the liquid spraying mechanism and the power component in response to the detection signal from the pressure detection component.

[0008] By adopting the above technical solution, the space inside the tray is divided into multiple independent ventilation zones. Each zone has its own dedicated pressure detection and air intake components, enabling precise zoned detection of the tray's sealing performance. When a leak is detected in a particular ventilation zone, the corresponding pressure detection component quickly detects the abnormal air pressure and sends feedback to the control module. This eliminates the need for blindly checking the entire tray, significantly narrowing down the location of the leak. Upon receiving the detection signal, the control module drives the spraying mechanism and detection mechanism to precisely move to the suspected leak area. The foam sprayed by the spraying mechanism generates visible bubbles under the influence of the leaking gas, allowing the detection mechanism to clearly capture the bubble positions and achieve precise leak location.

[0009] Compared to the shortcomings of traditional airtightness testing methods, which cannot pinpoint leaks, and liquid tightness testing methods, which are prone to missing leaks and leave residual moisture that can affect subsequent processes, this solution eliminates the need to immerse the pallet in water. Instead, it locates leaks by spraying foam onto the outer wall of the pallet. There is no significant moisture residue on the inner wall of the pallet, avoiding problems such as rust and weld oxidation. This solution achieves reliable leak location without affecting the subsequent use of the pallet, thus improving detection efficiency and accuracy.

[0010] Preferably, the separating mechanism includes multiple separating plates disposed on the support platform, each of the separating plates being equipped with an air-expanding seal, and the support platform having an air intake channel communicating with the interior of each air-expanding seal.

[0011] By adopting the above technical solution, the number of ventilation areas can be flexibly set according to the internal size of the tray and the testing requirements to achieve the division of ventilation areas as needed; the air expansion seal expands after gas is introduced into the air inlet channel, and it can closely contact the inner wall of the tray, which not only ensures the sealing and isolation between each ventilation area and avoids the distortion of test results caused by gas exchange between different areas, but also can adapt to the rounded corners, protrusions and other irregular structures of the tray wall, and improve the fit between the partitioning mechanism and the tray.

[0012] Preferably, the clamping mechanism includes a clamping drive component mounted on the support platform, a clamping plate connected to the clamping drive component, and an elastic pad connected to the clamping plate.

[0013] By adopting the above technical solution, the clamping drive can provide a stable clamping force, and the clamping plate tightly presses the inverted pallet onto the carrier platform, ensuring the sealing between the pallet and the carrier platform and preventing external gas from entering or internal gas from leaking.

[0014] Preferably, there are multiple clamping mechanisms, which are arranged along the outer periphery of the support platform.

[0015] By adopting the above technical solution, multiple clamping mechanisms evenly distributed along the outer periphery of the support platform can apply clamping force from different directions of the pallet, so that the pallet is subjected to uniform force.

[0016] Preferably, the spraying mechanism includes a foam gun mounted on the power unit and a liquid supply assembly connected to the foam gun.

[0017] Preferably, the support platform has a receiving annular groove, and a sealing ring is provided in the receiving annular groove.

[0018] By adopting the above technical solution, we can ensure the airtightness of the pallet's interior and the reliability of the pallet's position.

[0019] Preferably, the pressure sensing element is one of a gauge pressure sensor, a differential pressure sensor, or a digital pressure sensor.

[0020] Preferably, the detection mechanism includes a CCD camera and an illumination component connected to the power unit.

[0021] In summary, the present invention has at least one of the following beneficial technical effects: 1. By dividing the internal space of the tray into multiple independent ventilation zones, and using dedicated pressure detection and air inlet devices for each zone, precise zoned detection of the tray's sealing performance can be achieved. When a leak is detected in a certain ventilation zone, the corresponding pressure detection device can quickly detect the abnormal air pressure and feed it back to the control module, eliminating the need for blindly checking the entire tray and significantly narrowing down the range of leak location. After the control module responds to the detection signal, the drive unit moves the spraying mechanism and detection mechanism precisely to the suspected leak area. The foam sprayed by the spraying mechanism will generate obvious bubbles under the action of the leaking gas, and the detection mechanism can clearly capture the location of the bubbles, achieving precise location of the leak point. Compared with the shortcomings of traditional air tightness detection methods, which cannot determine the leak point, and liquid tightness detection methods, which are prone to missed detection and have residual moisture affecting subsequent processes, this solution does not require immersing the tray in water. It only locates the leak point by spraying foam locally on the outer wall of the tray. There is no obvious moisture residue on the inner wall of the tray, avoiding problems such as rust and weld oxidation. Without affecting the subsequent use of the tray, reliable location of the leak point is achieved, improving detection efficiency and accuracy. 2. The number of ventilation areas can be flexibly set according to the internal size of the tray and the testing requirements to achieve the required division of ventilation areas; the air expansion seal expands after gas is introduced into the air inlet channel, and it can closely contact the inner wall of the tray, which not only ensures the sealing and isolation between each ventilation area and avoids the distortion of test results caused by gas exchange between different areas, but also can adapt to the rounded corners, protrusions and other irregular structures of the tray wall, and improve the fit between the dividing mechanism and the tray. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a sealing detection device for a new energy vehicle battery tray according to an embodiment of this application; Figure 2 It is a sectional view used to illustrate the partition mechanism; Figure 3 It is a structural diagram used to illustrate the testing organization.

[0023] The attached diagram is labeled as follows: 1. Support platform; 11. Annular groove; 12. Sealing ring; 13. Air inlet channel; 14. Pressure detection element; 15. Air inlet element; 151. Air inlet pipe; 152. Air outlet pipe; 153. Air inlet connector; 2. Pressing mechanism; 21. Pressing drive element; 22. Pressing plate; 23. Elastic pad; 3. Separating mechanism; 31. Separating plate; 32. Air expansion seal; 4. Ventilation area; 5. Power element; 51. Detection mechanism; 511. CCD camera; 512. Lighting element; 52. Liquid spraying mechanism. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 limiting this invention.

[0026] This application discloses a sealing detection device for a new energy vehicle battery tray. It is used to reliably determine the location of a leak point in the tray without affecting its subsequent use. In this embodiment, a cuboid tray is used as an example.

[0027] Reference Figure 1 A sealing testing device for a new energy vehicle battery tray includes a support platform 1. The support platform 1 is equipped with a pressing mechanism 2. The tray can be inverted onto the support platform 1 to seal its internal space. The pressing mechanism 2 presses the inverted tray firmly against the support platform 1. Specifically, to ensure uniform pressing of the tray, multiple pressing mechanisms 2 are provided, arranged along the outer periphery of the support platform 1. It should be noted that some trays have structures such as process holes; before sealing testing, these structures need to be sealed using a shielding fixture or shielding plate.

[0028] Reference Figure 1 and Figure 2 To ensure the airtightness and reliability of the internal space of the pallet, a receiving ring groove 11 is provided on the support platform 1. A sealing ring 12 is provided inside the receiving ring groove 11. The sealing ring 12 is made of rubber, and the width of the receiving ring groove 11 is the same as the thickness of the pallet side wall. Part of the pallet can be inserted into the receiving ring groove 11 and abut against the sealing ring 12 to ensure the airtightness of the pallet's interior, thus preparing for subsequent sealing tests.

[0029] Reference Figure 1 Taking one of the pressing mechanisms 2 as an example: the pressing mechanism 2 includes a pressing drive 21 installed on the support platform 1, a pressing plate 22 connected to the pressing drive 21, and an elastic pad 23 connected to the pressing plate 22. In this embodiment, the pressing drive 21 is, for example, a pressing cylinder. Of course, in other embodiments, the pressing drive 21 can also be other components that can output rotational or linear motion.

[0030] Reference Figure 2The support platform 1 is equipped with a partitioning mechanism 3. After the tray is placed on the support platform 1, the partitioning mechanism 3 can divide the space inside the tray into multiple ventilation areas 4. Specifically, the partitioning mechanism 3 includes multiple partition plates 31 provided on the support platform 1. In this embodiment, the number of partition plates 31 is three. Each partition plate 31 is equipped with an air-inflating seal 32. In this embodiment, the air-inflating seal 32 is an inflatable airbag. The support platform 1 has an air intake channel 13 that communicates with the interior of each air-inflating seal 32. A ventilation connector that communicates with the air intake channel 13 is installed on the side wall of the support platform 1.

[0031] After the tray is inverted, an external air supply device supplies air to the air inlet channel 13 through the air connector. The air enters into multiple air-expanding seals 32, causing each air-expanding seal 32 to expand and come into contact with the tray wall. The above action can divide the internal space of the tray into multiple sealed ventilation areas 4.

[0032] In this embodiment, the number of ventilation areas 4 is changed based on the number of partition plates 31. When the number of partition plates 31 increases, the sealed area inside the tray will be divided into more and smaller ventilation areas 4. The smaller the ventilation area 4, the easier it is to determine the location of the leak point.

[0033] It should be noted that the design of the air-expanding seal 32 is to reliably separate the ventilation area 4, and the air-expanding seal 32 is also used to adapt to irregular structures such as rounded corners or protrusions that may appear on the pallet wall.

[0034] Reference Figure 2 In order to monitor the pressure and allow air intake for each ventilation zone 4, the support platform 1 is equipped with a pressure detection element 14 and an air intake element 15 corresponding to each ventilation zone 4. The pressure detection element 14 includes, for example, a gauge pressure sensor, a differential pressure sensor, or a digital pressure sensor. The air intake element 15 includes an air intake pipe 151 embedded inside the support platform 1, an air outlet pipe 152 connected to the air intake pipe 151 and located in the ventilation zone 4, an air intake connector 153 connected to the end of the air intake pipe 151 away from the ventilation zone 4, and an on / off valve installed on the air intake pipe 151. Air can be supplied to the ventilation zone 4 by using an external air supply device through the air intake connector 153.

[0035] After the tray is inverted and pressed, an external air supply device supplies air to the ventilation area 4 through the air inlet connector 153. If the pressure detection device 14 detects an abnormal air pressure in a certain ventilation area 4, it can be determined that there is a leak in the part of the tray corresponding to the current ventilation area 4.

[0036] Reference Figure 2 and Figure 3To determine the specific location of the leak point on the tray, a power unit 5, a detection mechanism 51, and a spraying mechanism 52 are provided on one side of the support platform 1. Both the detection mechanism 51 and the spraying mechanism 52 are connected to the power unit 5, which in this embodiment is a robotic arm. The spraying mechanism 52 includes a foam gun mounted on the power unit 5 and a liquid supply assembly connected to the foam gun. The liquid supply assembly generally includes a liquid supply tank, pipes, and valves, etc. The specific structure of the liquid supply assembly is existing technology and will not be described in detail here. The detection mechanism 51 includes a CCD camera 511 connected to the power unit 5 and an illumination component 512, where the illumination component 512 is a light source. A sealing detection device for a new energy vehicle battery tray also includes a control module. The power unit 5, the spraying mechanism 52, and the pressure detection component 14 are all connected to the control module. The control module controls the operation of the spraying mechanism 52 and the power unit 5 in response to the detection signal from the pressure detection component 14.

[0037] After the pressure detection component 14 initially determines the approximate location of the leak point on the tray, the control module will control the power component 5 to drive the spraying mechanism 52 to one side of the tray to spray liquid into the area where the leak point is located. Obvious bubbles will appear at the location of the leak point. The detection mechanism 51 can detect the location of the bubble breakage to determine the specific leak point. The number of leak points can be one or more.

[0038] In this application, since the expansion seal 32 may seal the leak point after it expands and presses against the tray, which may cause the leak point to be missed, in order to prevent the above situation from happening, the entire space inside the tray can be directly ventilated for supplementary inspection without using multiple expansion seals 32 to divide the space inside the tray, thereby determining that there is no leak point on the tray.

[0039] The implementation principle of the sealing detection device for a new energy vehicle battery tray in this application embodiment is as follows: The tray is inverted onto the support platform 1, allowing part of the tray to be inserted into the receiving ring groove 11 and abut against the sealing ring 12. The driving clamping drive 21 moves the elastic pad 23 to press the tray tightly. An external air supply device supplies air to the air inlet channel 13 through the air inlet connector. The gas enters multiple air-expanding seals 32, causing each air-expanding seal 32 to expand and abut against the tray wall. The internal space of the tray is divided into multiple sealed ventilation areas 4. An external air supply device supplies air to the ventilation areas 4 through the air inlet connector 153. If the pressure detection device 14 detects an abnormal air pressure in a certain ventilation area 4, it can be determined that there is a leak point in the part of the tray corresponding to the current ventilation area 4. After roughly determining the location of the leak point, the control module controls the power unit 5 to drive the spraying mechanism 52 to one side of the tray to spray liquid into the area where the leak point is located. Obvious bubbles will appear at the location of the leak point. The detection mechanism 51 can detect the location of the bubble breakage to determine the specific leak point.

[0040] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sealing detection device for a battery tray in a new energy vehicle, characterized in that: Includes a support platform (1), which is equipped with a pressing mechanism (2); the support platform (1) is provided with a dividing mechanism (3), which can divide the space inside the tray into multiple ventilation areas (4) after the tray is placed on the support platform (1); the support platform (1) is provided with a pressure detection element (14) and an air inlet element (15) corresponding to each ventilation area (4); The support platform (1) is provided with a power component (5), a detection mechanism (51) and a spraying mechanism (52) on one side. The detection mechanism (51) and the spraying mechanism (52) are both connected to the power component (5). A sealing detection device for a new energy vehicle battery tray also includes a control module. The power component (5), the liquid spraying mechanism (52), and the pressure detection component (14) are all connected to the control module. The control module controls the operation of the liquid spraying mechanism (52) and the power component (5) in response to the detection signal of the pressure detection component (14).

2. The sealing detection device for a new energy vehicle battery tray according to claim 1, characterized in that: The separation mechanism (3) includes a plurality of separation plates (31) disposed on the support platform (1), each of the separation plates (31) is equipped with an air-expanding seal (32), and the support platform (1) has an air intake channel (13) that communicates with the interior of each air-expanding seal (32).

3. The sealing detection device for a new energy vehicle battery tray according to claim 1, characterized in that: The clamping mechanism (2) includes a clamping drive (21) mounted on the support platform (1), a clamping plate (22) connected to the clamping drive (21), and an elastic pad (23) connected to the clamping plate (22).

4. The sealing detection device for a new energy vehicle battery tray according to claim 3, characterized in that: The clamping mechanism (2) is provided in multiple ways, and the multiple clamping mechanisms (2) are arranged along the outer periphery of the bearing platform (1).

5. The sealing detection device for a new energy vehicle battery tray according to claim 1, characterized in that: The spraying mechanism (52) includes a foam gun mounted on the power unit (5) and a liquid supply assembly connected to the foam gun.

6. The sealing detection device for a new energy vehicle battery tray according to claim 1, characterized in that: The support platform (1) has a receiving annular groove (11), and a sealing ring (12) is provided in the receiving annular groove (11).

7. The sealing detection device for a new energy vehicle battery tray according to claim 1, characterized in that: The pressure sensing element (14) is one of a gauge pressure sensor, a differential pressure sensor, or a digital pressure sensor.

8. The sealing detection device for a new energy vehicle battery tray according to claim 1, characterized in that: The detection mechanism (51) includes a CCD camera (511) and an illumination component (512) connected to the power component (5).

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