Leakage testing equipment for aluminum alloy battery tray

Abstract

The invention belongs to the technical field of battery safety performance detection, particularly relates to leakage testing equipment for an aluminum alloy battery tray, and aims to solve the problems that the position of a leakage point is difficult to quickly and effectively determine after leakage occurs during leakage testing, time needs to be spent on finding the leakage point, and the leakage testing efficiency of the leakage testing equipment is affected. The outer wall of the annular support is fixedly connected with an outer annular plate, the top of the annular support is provided with an annular frame, the annular frame is provided with a leakage test fixed point module, the top of the annular frame is fixedly connected with a fixed support, and the fixed support is provided with a leakage test fixed module. The leakage testing equipment for the aluminum alloy battery tray has the effect of improving the leakage testing operation efficiency, gas is adopted for detection when the leakage testing equipment is used, and when a leakage point is detected, the leakage testing equipment can give an alarm at the position of the leakage point, so that workers can quickly determine the leakage point conveniently, and the using effect of the leakage testing equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery safety performance detection, and particularly to a leak detection device for an aluminum alloy battery tray. Background Art

[0002] Leak detection of the battery tray plays a crucial role in the assembly of battery packs, modules, and battery groups. Since the electrolyte contained in the battery is highly flammable, once leaked, it may cause a fire. In addition, even a small amount of humidity may cause the battery system to short-circuit, reducing the service life and performance.

[0003] Therefore, it is crucial to conduct a reliable leak test on the battery tray to ensure that the battery operates without leakage and can effectively prevent moisture, water, and other liquids, thereby guaranteeing the safety and durability of the battery.

[0004] When the existing battery tray is subjected to leak detection, the leakage points mainly appear at the edge part. During leak detection, the battery tray is sealed, and whether there is leakage is detected through gas. However, when leakage occurs during leak detection, it is difficult to quickly and effectively determine the position of the leakage point, resulting in the need to spend time searching for the leakage point, thereby affecting the leak detection efficiency of the device. Summary of the Invention

[0005] The present invention discloses a leak detection device for an aluminum alloy battery tray, aiming to solve the technical problem that when the existing battery tray is subjected to leak detection, the leakage points mainly appear at the edge part. During leak detection, the battery tray is sealed, and whether there is leakage is detected through gas. However, when leakage occurs during leak detection, it is difficult to quickly and effectively determine the position of the leakage point, resulting in the need to spend time searching for the leakage point, thereby affecting the leak detection efficiency of the device.

[0006] A leak detection device for an aluminum alloy battery tray proposed by the present invention includes an annular bracket. An outer ring plate is fixedly connected to the outer wall of the annular bracket, and an annular frame is arranged at the top of the annular bracket. A leak detection positioning module is arranged on the annular frame, and a fixed bracket is fixedly connected to the top of the annular frame. A leak detection fixing module is arranged on the fixed bracket, and a leak detection table is fixedly connected to the inner wall of the outer ring plate. The leak detection table is located inside the annular bracket, and a battery tray body is arranged above the leak detection table.

[0007] The leak detection positioning module includes a mounting shaft rod, and a leak detection impeller is fixedly connected to the outer wall of the mounting shaft rod.

[0008] The leak detection fixing module includes two fixed suction cups.

[0009] By providing an annular bracket, an outer ring plate, an annular frame, a leak detection positioning module, a fixed bracket, a leak detection fixing module, a leak detection table and a battery tray body, the leak detection positioning module can give an alarm at the position of the leakage point when detecting the leak of the battery tray body, so as to facilitate the leak detection personnel to quickly locate and confirm the leakage point, meeting the leak detection requirements of the device; the leak detection fixing module can fix the battery tray body during use, thus preventing it from shifting during the leak detection operation, and then ensuring the operation effect of the device during leak detection and meeting the leak detection requirements of the device.

[0010] In a preferred solution, the leak detection positioning module further includes a gear ring frame, which is movably connected to the annular frame. The top of the gear ring frame is fixedly connected to an electric telescopic rod, and the output end of the electric telescopic rod is fixedly connected to a connecting rod bracket. An electric push rod is fixedly connected to the connecting rod bracket. And a servo motor is fixedly connected to the leak detection table. The output shaft of the servo motor is connected to a driving gear through a coupling, and the driving gear meshes with the gear ring frame. The output end of the electric push rod is fixedly connected to a controller. Two receiving contacts are fixedly connected to one side outer wall of the controller. And two alarm devices and a connecting plate frame are fixedly connected to the top of the controller. The bottom of the connecting plate frame is fixedly connected to an installation frame. An installation shaft rod is movably connected to the installation frame. Eccentric plates are fixedly connected to both ends of the installation shaft rod. Eccentric rods are fixedly connected to the outer walls of the two eccentric plates. Link rods are movably connected to the outer walls of the two eccentric rods. Installation sleeve frames are movably connected to one ends of the two link rods. Triggering elements are fixedly connected to the inner walls of the two installation sleeve frames. And a limiting ring frame is fixedly connected to the installation frame. The outer walls of the two installation sleeve frames are movably connected to the inner wall of the limiting ring frame. Limiting parts are fixedly connected to one ends of the two eccentric rods. And installation brackets are fixedly connected to the outer walls of both sides of the installation frame. Elastic bases are fixedly connected to the opposite side outer walls of the two installation brackets. Four installation openings are provided in each of the two elastic bases. Limiting touch balls are arranged inside the multiple installation openings. And the outer walls of every four limiting touch balls are in contact with the outer wall of the same limiting part.

[0011] By providing a leak detection positioning module, when a leakage point appears during detection, the leak detection positioning module can give an alarm at the position of the leakage point, so as to facilitate the staff to quickly locate and confirm the leakage point, and then facilitate the staff to mark the leakage point, so that the staff do not need to spend time looking for the leakage point after the leak detection, thus increasing the leak detection operation efficiency of the device. And when adjusting the leak detection position, the limiting part and the limiting touch balls can prevent the device from being accidentally triggered by the alarm, further increasing the use effect of the device.

[0012] In a preferred embodiment, the leak detection fixing module further includes a telescopic oil cylinder, which is fixedly connected to the top of the fixing bracket, and the output end of the telescopic oil cylinder is fixedly connected with a leak detection pressing plate. Two sealing rings are fixedly connected to the bottom of the leak detection pressing plate, and both sealing rings are located between the battery tray body and the leak detection pressing plate. Two air inlets are opened on the top of the leak detection pressing plate, and two fixing ports are opened on the top of the leak detection table. An air pump is fixedly connected to the top of the fixing bracket, and the output end of the air pump is fixedly connected with two delivery pipes. The output ends of the two delivery pipes are fixedly connected with air inlet spray heads, and the two air inlet spray heads are respectively fixedly connected to the inner walls of the two air inlets. The input end of the air pump is fixedly connected with an air inlet pipe and two negative pressure pipes. Control valves are arranged on the air inlet pipe and the two negative pressure pipes. The bottom of the leak detection table is fixedly connected with two support frames, and two fixing suction cups are respectively fixedly connected to the inner walls of the two support frames. The two fixing suction cups are respectively located inside the two fixing ports, and the input ends of the two negative pressure pipes are respectively fixedly connected to the bottoms of the two fixing suction cups.

[0013] By providing a leak detection fixing module, the leak detection fixing module can seal the battery tray body during the leak detection operation, facilitating leak detection. At the same time, before the detection, the device can fix the battery tray body, thus avoiding the deviation of the battery tray during the sealing process and affecting the sealing effect, so as to ensure the accuracy of the leak detection of the device.

[0014] As can be seen from the above, an aluminum alloy battery tray leak detection device provided by the present invention has the function of increasing the leak detection operation efficiency. When in use, the device uses gas for detection. When a leakage point is detected, the device can issue an alarm at the position of the leakage point, thus facilitating the staff to quickly determine the leakage point and increasing the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an aluminum alloy battery tray leak detection device proposed by the present invention;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of an aluminum alloy battery tray leak detection device proposed by the present invention;

[0017] Figure 3 It is a schematic diagram of the structure of the leak detection positioning module of an aluminum alloy battery tray leak detection device proposed by the present invention;

[0018] Figure 4 It is a schematic diagram of the combined structure of the gear ring frame and the driving gear of an aluminum alloy battery tray leak detection device proposed by the present invention;

[0019] Figure 5 Proposed by the present invention Figure 4 Schematic diagram of partial structure disassembly;

[0020] Figure 6 Schematic structural diagram of the leak detection and fixing module of a leak detection device for an aluminum alloy battery tray proposed by the present invention;

[0021] Figure 7 Proposed by the present invention Figure 6 Schematic diagram of partial structure disassembly.

[0022] In the figure: 1, annular bracket; 2, outer ring plate; 3, annular frame; 4, leak detection and positioning module; 401, gear ring bracket; 402, connecting rod bracket; 403, electric push rod; 404, electric telescopic rod; 405, alarm; 406, controller; 407, driving gear; 408, servo motor; 409, receiving contact; 410, connecting plate bracket; 411, installation frame; 412, leak detection impeller; 413, installation shaft rod; 414, eccentric plate; 415, limiting part; 416, limiting contact ball; 417, elastic base; 418, eccentric rod; 419, installation bracket; 420, linkage rod; 421, installation sleeve frame; 422, triggering part; 423, limiting ring bracket; 5, fixed bracket; 6, leak detection table; 7, leak detection and fixing module; 701, telescopic oil cylinder; 702, leak detection pressing plate; 703, negative pressure pipe; 704, sealing ring; 705, fixed suction cup; 706, support frame; 707, air inlet spray head; 708, control valve; 709, air inlet pipe; 710, air pump; 711, conveying pipe; 8, battery tray body. Specific implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] A leak detection device for an aluminum alloy battery tray disclosed by the present invention is mainly applied to the scenario where it is difficult to quickly and effectively determine the position of the leak point after leakage during leak detection, resulting in the need to spend time searching for the leak point, thereby affecting the leak detection efficiency of the device.

[0025] Referring to Figures 1-7 , a leak detection device for an aluminum alloy battery tray includes an annular bracket 1. The outer wall of the annular bracket 1 is fixedly connected with an outer ring plate 2, and the top of the annular bracket 1 is provided with an annular frame 3. A leak detection and positioning module 4 is arranged on the annular frame 3, and a fixed bracket 5 is fixedly connected to the top of the annular frame 3. A leak detection and fixing module 7 is arranged on the fixed bracket 5. The inner wall of the outer ring plate 2 is fixedly connected with a leak detection table 6. The leak detection table 6 is located inside the annular bracket 1, and a battery tray body 8 is arranged above the leak detection table 6;

[0026] The leak detection and positioning module 4 includes an installation shaft rod 413, and a leak detection impeller 412 is fixedly connected to the outer wall of the installation shaft rod 413;

[0027] The leak detection fixing module 7 includes two fixing suction cups 705.

[0028] Specifically, when the leak detection positioning module 4 performs leak detection on the battery tray body 8, it can give an alarm at the position of the leak point, so as to facilitate the leak detection personnel to quickly locate and confirm the leak point, so as to meet the leak detection requirements of the device; when the leak detection fixing module 7 is in use, it can fix the battery tray body 8, so as to avoid its deviation during the leak detection operation, and then ensure the operation effect of the device during leak detection and meet the leak detection requirements of the device.

[0029] Refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 5 , in a preferred embodiment, the leak detection positioning module 4 further includes a gear ring frame 401, the gear ring frame 401 is rotatably connected to the annular frame 3, the top of the gear ring frame 401 is fixedly connected with an electric telescopic rod 404, the output end of the electric telescopic rod 404 is fixedly connected with a connecting rod bracket 402, an electric push rod 403 is fixedly connected to the connecting rod bracket 402, and a servo motor 408 is fixedly connected to the leak detection table 6. The output shaft of the servo motor 408 is connected with a driving gear 407 through a coupling, the driving gear 407 meshes with the gear ring frame 401, the output end of the electric push rod 403 is fixedly connected with a controller 406, two receiving contacts 409 are fixedly connected to the outer wall of one side of the controller 406, and a connecting plate frame 410 and two alarms 405 are fixedly connected to the top of the controller 406. The bottom of the connecting plate frame 410 is fixedly connected with a mounting frame 411. The mounting shaft rod 413 is connected to the mounting frame 411 through a bearing. Eccentric plates 414 are fixedly connected to both ends of the mounting shaft rod 413. Eccentric rods 418 are fixedly connected to the outer walls of the two eccentric plates 414. Link rods 420 are connected to the outer walls of the two eccentric rods 418 through bearings. One end of each of the two link rods 420 is rotatably connected to a mounting sleeve frame 421. Triggering elements 422 are fixedly connected to the inner walls of the two mounting sleeve frames 421. A limiting ring frame 423 is fixedly connected to the mounting frame 411. The outer walls of the two mounting sleeve frames 421 are slidably connected to the inner wall of the limiting ring frame 423. Limiting members 415 are fixedly connected to one ends of the two eccentric rods 418. Mounting brackets 419 are fixedly connected to the outer walls of both sides of the mounting frame 411. Elastic bases 417 are fixedly connected to the opposite outer walls of the two mounting brackets 419. Four mounting openings are formed in each of the two elastic bases 417. Limiting touch balls 416 are arranged inside the plurality of mounting openings. The outer walls of every four limiting touch balls 416 are in contact with the outer wall of the same limiting member 415.

[0030] Specifically, during leak testing, the servo motor 408 and the electric telescopic rod 404 operate. The servo motor 408 drives the driving gear 407 to rotate. Since the driving gear 407 meshes with the gear ring frame 401, it can drive the gear ring frame 401 and the electric telescopic rod 404 to rotate to adjust the position. At the same time, the electric telescopic rod 404 can adjust the position of the connecting rod bracket 402 until it reaches the edge of the battery tray body 8 to be leak-tested. When adjusting the position, the elastic base 417 drives the limiting touch ball 416 to apply a certain pressure to the surface of the internal limiting member 415 to cooperate with the limiting member 415 to prevent it from rotating (to prevent the leak-testing impeller 412 from rotating during the adjustment process, and further prevent the occurrence of false triggering of the alarm). Then, the electric push rod 403 is started, and the electric push rod 403 drives the controller 406 to move to find the leak point. When a leak point appears, due to gas leakage, the gas can drive the leak-testing impeller 412 to rotate against the restrictions of the limiting touch ball 416 and the limiting member 415. Furthermore, the leak-testing impeller 412 drives the mounting shaft rod 413 and the eccentric plate 414 to rotate. Then, the eccentric plate 414 drives the eccentric rod 418 and the linkage rod 420 to operate. At this time, the linkage rod 420 can drive the mounting sleeve frame 421 and the triggering member 422 to move on the limiting ring frame 423, so that the triggering member 422 contacts the receiving touch member 409. Thus, the alarm 405 is started through the controller 406 to alarm the position of the leak point until the leak-testing operation is completed;

[0031] In a specific application scenario, the leak-testing positioning module 4 is applicable to the leak-point detection and positioning link of leak testing. That is, when the leak-testing positioning module 4 detects a leak point, it can issue an alarm at the position of the leak point, which is convenient for the staff to quickly locate and confirm the leak point. Furthermore, it is convenient for the staff to mark the leak point, so that the staff does not need to spend time looking for the leak point after leak testing, thus increasing the leak-testing operation efficiency of the device. And when adjusting the leak-testing detection position, the limiting member 415 and the limiting touch ball 416 can prevent the device from having false triggering of the alarm, further increasing the use effect of the device.

[0032] Refer to Figure 2 、 Figure 6 and Figure 7, in a preferred embodiment, the leak detection and fixing module 7 further includes a telescopic oil cylinder 701. The telescopic oil cylinder 701 is fixedly connected to the top of the fixed bracket 5, and the output end of the telescopic oil cylinder 701 is fixedly connected with a leak detection pressure plate 702. Two sealing rings 704 are fixedly connected to the bottom of the leak detection pressure plate 702. Both of the two sealing rings 704 are located between the battery tray body 8 and the leak detection pressure plate 702. Two air inlets are opened on the top of the leak detection pressure plate 702. Two fixing ports are opened on the top of the leak detection table 6. An air pump 710 is fixedly connected to the top of the fixed bracket 5. The output ends of two delivery pipes 711 are fixedly connected to the air pump 710. The output ends of the two delivery pipes 711 are both fixedly connected with air inlet spray heads 707, and the two air inlet spray heads 707 are respectively fixedly connected to the inner walls of the two air inlets. The input end of the air pump 710 is fixedly connected with an air inlet pipe 709 and two negative pressure pipes 703. Control valves 708 are arranged on both the air inlet pipe 709 and the two negative pressure pipes 703. Two support frames 706 are fixedly connected to the bottom of the leak detection table 6. Two fixed suction cups 705 are respectively fixedly connected to the inner walls of the two support frames 706. The two fixed suction cups 705 are respectively located inside the two fixing ports. The input ends of the two negative pressure pipes 703 are respectively fixedly connected to the bottoms of the two fixed suction cups 705.

[0033] Specifically, during use, the battery tray body 8 is arranged on the leak detection table 6, and the fixed suction cup 705 is made to contact the bottom of the battery tray body 8. At this time, the air pump 710 is started, and the control valve 708 on the negative pressure pipe 703 is opened, so that the gas inside the fixed suction cup 705 is discharged through the negative pressure pipe 703. Then, the fixed suction cup 705 fixes the battery tray body 8. After fixing, the control valve 708 on the negative pressure pipe 703 is closed. At this time, the telescopic oil cylinder 701 is started, and the leak detection pressure plate 702 and the sealing ring 704 are driven by the telescopic oil cylinder 701 to descend, and the leak detection pressure plate 702 is made to contact above the battery tray body 8. At the same time, the inside of the battery tray body 8 is sealed in cooperation with the sealing ring 704. Then, the control valve 708 on the air inlet pipe 709 is opened, and the gas is transported into the delivery pipe 711 through the air inlet pipe 709 and the air pump 710, and is further transported into the battery tray body 8 through the air inlet spray head 707, so that the inside thereof is in a high-pressure state. When there is a leakage point on the battery tray body 8, the gas will be discharged through the leakage point for leak detection.

[0034] In a specific application scenario, the leak detection and fixing module 7 is applicable to the leak detection and fixing link of the battery tray, that is, the leak detection and fixing module 7 can seal the battery tray body 8 during the leak detection operation for easy leak detection. At the same time, before the detection, the device can fix the battery tray body 8, so as to avoid the battery tray shifting during the sealing process and affecting the sealing effect, and ensure the accuracy of the leak detection of the device.

[0035] Working principle: When in use, place the battery tray body 8 on the leak detection table 6, and make the fixed suction cup 705 contact the bottom of the battery tray body 8. At this time, start the air pump 710 and open the control valve 708 on the negative pressure pipe 703, so as to discharge the gas inside the fixed suction cup 705 through the negative pressure pipe 703. Then, make the fixed suction cup 705 fix the battery tray body 8. After fixing, close the control valve 708 on the negative pressure pipe 703. At this time, start the telescopic oil cylinder 701, drive the leak detection pressing plate 702 and the sealing ring 704 to descend through the telescopic oil cylinder 701, and make the leak detection pressing plate 702 contact the upper part of the battery tray body 8. At the same time, cooperate with the sealing ring 704 to seal the inside of the battery tray body 8. Then, open the control valve 708 on the air inlet pipe 709, and transport the gas to the inside of the delivery pipe 711 through the air inlet pipe 709 and the air pump 710, and further transport it to the inside of the battery tray body 8 through the air inlet nozzle 707, so that the inside is in a high-pressure state. When there is a leakage point on the battery tray body 8, the gas will be discharged through the leakage point for leak detection;

[0036] During leak detection, the servo motor 408 and the electric telescopic rod 404 operate. The servo motor 408 drives the driving gear 407 to rotate. Since the driving gear 407 meshes with the gear ring frame 401, it can drive the gear ring frame 401 and the electric telescopic rod 404 to rotate to adjust the position. At the same time, the electric telescopic rod 404 can adjust the position of the connecting rod bracket 402 until it is adjusted to the edge of the battery tray body 8 to be leak-detected. When adjusting the position, the elastic base 417 drives the limiting touch ball 416 to apply a certain pressure to the surface of the internal limiting member 415 to cooperate with the limiting member 415 to prevent it from rotating. Then, start the electric push rod 403, drive the controller 406 to move through the electric push rod 403 to find the leakage point. When there is a leakage point, due to gas leakage, at this time, the gas can drive the leak detection impeller 412 to rotate against the limitation of the limiting touch ball 416 and the limiting member 415. Then, the leak detection impeller 412 drives the mounting shaft rod 413 and the eccentric plate 414 to rotate. Then, the eccentric plate 414 drives the eccentric rod 418 and the linkage rod 420 to operate. At this time, the linkage rod 420 can drive the mounting sleeve frame 421 and the triggering member 422 to move on the limiting ring frame 423, and then the triggering member 422 contacts the receiving touch member 409, so as to start the alarm 405 through the controller 406 to alarm the position of the leakage point until the leak detection operation is completed.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An air leakage testing device for an aluminum alloy battery tray, comprising an annular bracket (1), characterized in that, The outer wall of the annular bracket (1) is fixedly connected with an outer ring plate (2), and an annular frame (3) is arranged at the top of the annular bracket (1). A leak detection positioning module (4) is arranged on the annular frame (3), and a fixed bracket (5) is fixedly connected to the top of the annular frame (3). A leak detection fixing module (7) is arranged on the fixed bracket (5), and a leak detection table (6) is fixedly connected to the inner wall of the outer ring plate (2). The leak detection table (6) is located inside the annular bracket (1), and a battery tray body (8) is arranged above the leak detection table (6); The leak detection positioning module (4) includes a mounting shaft rod (413), and a leak detection impeller (412) is fixedly connected to the outer wall of the mounting shaft rod (413); The leak detection fixing module (7) includes two fixed suction cups (705).

2. The leak detection device for an aluminum alloy battery tray according to claim 1, characterized in that The leak detection positioning module (4) further includes a gear ring frame (401). The gear ring frame (401) is movably connected to the annular frame (3). An electric telescopic rod (404) is fixedly connected to the top of the gear ring frame (401). The output end of the electric telescopic rod (404) is fixedly connected to a connecting rod bracket (402). An electric push rod (403) is fixedly connected to the connecting rod bracket (402). A servo motor (408) is fixedly connected to the leak detection table (6). The output shaft of the servo motor (408) is connected to a driving gear (407) through a coupling. The driving gear (407) meshes with the gear ring frame (401).

3. An air leak detection device for an aluminum alloy battery tray according to claim 2, characterized in that, The output end of the electric push rod (403) is fixedly connected to a controller (406). Two receiving contacts (409) are fixedly connected to the outer wall of one side of the controller (406). A connecting plate frame (410) and two alarms (405) are fixedly connected to the top of the controller (406). The mounting frame (411) is fixedly connected to the bottom of the connecting plate frame (410). The mounting shaft rod (413) is movably connected to the mounting frame (411).

4. The leak detection device for an aluminum alloy battery tray according to claim 3, wherein, Eccentric plates (414) are fixedly connected to both ends of the mounting shaft rod (413). Eccentric rods (418) are fixedly connected to the outer walls of the two eccentric plates (414). Link rods (420) are movably connected to the outer walls of the two eccentric rods (418). One ends of the two link rods (420) are movably connected to mounting sleeve frames (421). Triggering elements (422) are fixedly connected to the inner walls of the two mounting sleeve frames (421). A limiting ring frame (423) is fixedly connected to the mounting frame (411). The outer walls of the two mounting sleeve frames (421) are movably connected to the inner wall of the limiting ring frame (423).

5. The leak detection device for an aluminum alloy battery tray according to claim 4, characterized in that, Limiters (415) are fixedly connected to one ends of the two eccentric rods (418), and mounting brackets (419) are fixedly connected to the outer walls of both sides of the mounting frame (411).

6. The leak detection device for an aluminum alloy battery tray according to claim 5, characterized in that, Elastic bases (417) are fixedly connected to the opposite outer walls of the two mounting brackets (419). Four mounting openings are formed in each of the two elastic bases (417). Limiting touch balls (416) are arranged inside the multiple mounting openings. The outer walls of every four limiting touch balls (416) are in contact with the outer wall of the same limiter (415).

7. The leak detection device for an aluminum alloy battery tray according to claim 1, wherein, The leak detection and fixing module (7) further includes a telescopic oil cylinder (701), the telescopic oil cylinder (701) is fixedly connected to the top of the fixed bracket (5), and the output end of the telescopic oil cylinder (701) is fixedly connected with a leak detection pressure plate (702).

8. An air leakage testing device for an aluminum alloy battery tray according to claim 7, characterized in that, Two sealing rings (704) are fixedly connected to the bottom of the leak detection pressure plate (702). Both of the two sealing rings (704) are located between the battery tray body (8) and the leak detection pressure plate (702). Two air inlets are opened on the top of the leak detection pressure plate (702), and two fixing ports are opened on the top of the leak detection table (6).

9. The leak detection device for an aluminum alloy battery tray according to claim 8, wherein, An air pump (710) is fixedly connected to the top of the fixed bracket (5). The output end of the air pump (710) is fixedly connected with two delivery pipes (711). The output ends of the two delivery pipes (711) are both fixedly connected with air inlet spray heads (707), and the two air inlet spray heads (707) are respectively fixedly connected to the inner walls of the two air inlets.

10. A leak detection device for an aluminum alloy battery tray according to claim 9, characterized in that, The input end of the air pump (710) is fixedly connected with an air inlet pipe (709) and two negative pressure pipes (703). Control valves (708) are arranged on both the air inlet pipe (709) and the two negative pressure pipes (703). Two support frames (706) are fixedly connected to the bottom of the leak detection table (6). Two fixed suction cups (705) are respectively fixedly connected to the inner walls of the two support frames (706). The two fixed suction cups (705) are respectively located inside the two fixing ports. The input ends of the two negative pressure pipes (703) are respectively fixedly connected to the bottoms of the two fixed suction cups (705).

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