A lithium-air battery shell airtightness detection device

Abstract

This utility model discloses a lithium-air battery casing airtightness testing device, relating to the field of battery casing airtightness testing technology. It includes a testing platform, with a water tank fixedly connected to its upper surface. A lifting assembly is located at the lower end of the water tank, and four sets of clamping assemblies are arranged above the water tank. Each set of clamping assemblies includes a support plate. Connecting seats two are fixedly connected to both sides of one end of the lower surface of the support plate, and connecting seat one is fixedly connected to the center of the lower surface of the support plate away from connecting seat two. Sliding rods are fixedly connected to the inner walls of connecting seat one and connecting seat two. Through a gear-and-rack-and-rack-two meshing transmission structure, and driven by an electric push rod, the device achieves synchronous reverse movement of sliding plate one and sliding plate two, causing the clamping plates to symmetrically clamp the casing. Compared to manual handling, this ensures uniform clamping force, prevents shaking during water ingress, and guarantees measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of battery casing airtightness testing technology, specifically to a lithium-air battery casing airtightness testing device. Background Technology

[0002] Lithium-air batteries, as a new type of energy storage device with ultra-high theoretical energy density, have shown broad application prospects in fields such as electric vehicles and energy storage power stations.

[0003] When a traditional handheld casing is immersed in water, hand tremors and uneven force can easily cause the casing to tilt or shift position, potentially resulting in leaks not being fully submerged underwater or air bubbles being blocked due to an improper angle between the casing and the water surface.

[0004] Traditional manual inspection or single-station equipment requires operating the shell one by one, resulting in a long inspection cycle. In traditional inspection, the shell is manually clamped, and uneven force can easily lead to shell deformation, incomplete water entry at the water inclination angle, and arbitrary lifting and lowering speeds, as well as water flow disturbance and air bubbles. These problems can significantly affect the accuracy of the inspection. Utility Model Content

[0005] The purpose of this invention is to provide a lithium-air battery casing airtightness testing device to solve the problems of the existing lithium-air battery casing airtightness testing device mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium-air battery casing airtightness testing device, including a testing platform.

[0007] A further improvement of this utility model is that: a water tank is fixedly connected to the upper surface of the testing platform, a lifting assembly is provided at the lower end of the water tank, and four sets of clamping assemblies are provided above the water tank. The four sets of clamping assemblies include a support plate. Connecting seats two are fixedly connected to both sides of one end of the lower surface of the support plate. Connecting seat one is fixedly connected to the center of the lower surface of the support plate away from connecting seat two. A sliding rod is fixedly connected to the inner wall opposite to the inner wall of connecting seat one and connecting seat two. A sliding plate one is slidably connected to the outer side of one end of the sliding rod, and a sliding plate two is fixedly connected to the outer surface of the other end of the sliding rod. A rack one is fixedly connected to the inner side of sliding plate one, and a rack two is fixedly connected to the inner side of sliding plate two. A gear one is rotatably connected to the lower surface of the support plate near the inner side of rack one and rack two. Both sides of gear one are meshed with rack one and rack two.

[0008] A further improvement of this utility model is that: a fixed seat is fixedly connected to the center of the upper surface of the support plate, four through sliding grooves are opened on the upper surface of the support plate, a moving block is fixedly connected to the center of the upper surface of the sliding plate two through sliding grooves to the upper surface of the support plate, an electric push rod is fixedly connected to the inner side of the moving block, and the other end of the electric push rod is fixedly connected to one side of the fixed seat.

[0009] A further improvement of this utility model's technical solution is that: the lifting assembly includes a servo motor, the output shaft of the servo motor is fixedly connected to a rotating shaft, both ends of the inner wall of the detection table are fixedly connected to an L-shaped fixing plate one and an L-shaped fixing plate two, one end of the rotating shaft is fixedly connected to a first active bevel gear, a first driven bevel gear meshes above the first active bevel gear, the upper end of the first driven bevel gear is fixedly connected to a threaded rod one through the L-shaped fixing plate two, the other end of the rotating shaft is fixedly connected to a second active bevel gear through the L-shaped fixing plate one and the L-shaped fixing plate two, a second driven bevel gear meshes above the second active bevel gear, and the upper surface of the second driven bevel gear is fixedly connected to a threaded rod two through the L-shaped fixing plate one.

[0010] A further improvement of the present invention is that: both ends of the support plate are fixedly connected to a U-shaped seat one, both ends of the support plate are fixedly connected to a U-shaped seat two at the center of the outer surface of both ends of the support plate, both sides of the upper surface of both ends of the detection table are fixedly connected to a limiting rod, the other end of the limiting rod passes through the U-shaped seat one and is fixedly connected to a connecting plate, and the upper ends of the threaded rod one and the threaded rod two pass through the U-shaped seat two and are rotatably connected to the lower surface of the connecting plate.

[0011] A further improvement of the present invention is that: a clamping plate is fixedly connected to the lower surface of both sliding plate one and sliding plate two, and an anti-slip pad is fixedly connected to the inner wall of both clamping plates; and a rotating column is rotatably connected to the lower surface of the support plate near the rear end of both rack one and rack two.

[0012] A further improvement of this utility model is that: a cross-shaped partition plate is fixedly connected to the inner wall of the water tank; an outlet is provided at the center of the water tank; an outlet pipe extending to one side of the testing platform is fixedly connected to the outer side of the lower surface of the water tank near the outlet; a water valve is fixedly connected to the outlet end of the outlet pipe; and support legs are fixedly connected to both ends of the lower surface of the testing platform.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model utilizes a device with a meshing transmission structure of gear one and rack one and rack two, coupled with an electric push rod drive, to achieve synchronous reverse movement of sliding plate one and sliding plate two. This drives the clamping plates to symmetrically clamp the shell. Compared to manual hand operation, this ensures uniform clamping force, prevents shaking during water ingress, and guarantees measurement accuracy. The electric push rod stroke is precisely controlled to avoid tilting or deformation of the shell due to force imbalance. The anti-slip pads on the inner wall of the clamping plates further increase the coefficient of friction, preventing the shell from sliding during lifting and lowering, ensuring that leakage risk areas such as welds and interfaces are always within the detection field of view, and eliminating the risk of missed detection.

[0015] 2. This utility model uses four sets of independent clamping components to simultaneously perform airtightness testing on four battery casings. Compared with the traditional single-station equipment's individual operation mode, the testing efficiency is improved. The cross-shaped partition plate inside the water tank divides the testing area into four independent units, with each set of clamping components corresponding to one unit. During testing, air bubbles generated by a single casing are confined to their designated area, avoiding misjudgments caused by the mixing of air bubbles from multiple casings in traditional open water tanks, thus enabling accurate location of the leak source. Attached Figure Description

[0016] Figure 1 This is a front-view three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the lifting component structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the clamping component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the top structure of this utility model;

[0021] Figure 6 This is an enlarged structural diagram of point A of this utility model.

[0022] In the diagram: 1. Testing platform; 2. Water tank; 21. Cross partition plate; 3. Clamping assembly; 301. Support plate; 302. Sliding plate one; 303. Connecting seat one; 304. Sliding plate two; 305. Sliding rod; 306. Connecting seat two; 307. Rack one; 308. Gear one; 309. Rack two; 310. Clamping plate; 311. Anti-slip pad; 312. Fixed seat; 313. Sliding groove; 314. U-shaped seat one; 315. Limiting rod; 316. U-shaped seat two; 3 17. Moving block; 318. Electric push rod; 4. Connecting plate; 5. Support leg; 6. Lifting assembly; 601. Servo motor; 602. First driving bevel gear; 603. First driven bevel gear; 604. Threaded rod one; 605. Threaded rod two; 606. L-shaped fixing plate one; 607. Second driven bevel gear; 608. Second driving bevel gear; 609. Rotating shaft; 610. L-shaped fixing plate two; 7. Water outlet; 8. Water valve; 9. Water outlet pipe; 10. Rotating column. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4This utility model provides a technical solution: a lithium-air battery casing airtightness testing device, including a testing platform 1, a water tank 2 fixedly connected to the upper surface of the testing platform 1, a lifting assembly 6 provided at the lower end of the water tank 2, and four sets of clamping assemblies 3 provided above the water tank 2. Each set of clamping assemblies 3 includes a support plate 301, with connecting seats 2 306 fixedly connected to both sides of one end of the lower surface of the support plate 301, and a connecting seat 1 303 fixedly connected to the center of the lower surface of the support plate 301 away from the connecting seat 2 306. The connecting seat 1 303 is connected to the connecting seat 2 306. A sliding rod 305 is fixedly connected to the inner wall of the second connector 306. A sliding plate 302 is slidably connected to the outer side of one end of the sliding rod 305. A sliding plate 304 is fixedly connected to the outer surface of the other end of the sliding rod 305. A rack 307 is fixedly connected to the inner side of the sliding plate 302. A rack 309 is fixedly connected to the inner side of the sliding plate 304. A gear 308 is rotatably connected to the lower surface of the support plate 301 near the inner side of the rack 307 and the rack 309. Both sides of the gear 308 are connected to the rack 307 and the rack 309. The rack and pinion 309 is engaged. A fixed seat 312 is fixedly connected to the center of the upper surface of the support plate 301. Four through sliding grooves 313 are formed on the upper surface of the support plate 301. A moving block 317 is fixedly connected to the center of the upper surface of the sliding plate 304 through the sliding grooves 313 to the upper surface of the support plate 301. An electric push rod 318 is fixedly connected to the inner side of the moving block 317. The other end of the electric push rod 318 is fixedly connected to one side of the fixed seat 312. By activating the electric push rod 318, the output end of the electric push rod 318... The moving block 317 slides along the sliding groove 313 of the support plate 301. The moving block 317 is fixedly connected to the second sliding plate 304, which in turn drives the second sliding plate 304 to move along the sliding rod 305. When the second sliding plate 304 moves, the second rack 309 on its inner side drives the first gear 308 to rotate. The first gear 308 simultaneously meshes with and drives the first rack 307. The first rack 307 is fixed to the first sliding plate 302, so that the first sliding plate 302 and the second sliding plate 304 move synchronously in opposite directions along the sliding rod 305, thereby realizing the clamping or loosening action of the battery casing.

[0025] Reference Figure 3 , Figure 5 , Figure 6The lifting assembly 6 includes a servo motor 601, with a rotating shaft 609 fixedly connected to the output shaft of the servo motor 601. L-shaped fixing plates 606 and 610 are fixedly connected to both ends of the inner wall of the detection table 1. A first driving bevel gear 602 is fixedly connected to one end of the rotating shaft 609. A first driven bevel gear 603 meshes above the first driving bevel gear 602. A threaded rod 604 is fixedly connected to the upper end of the first driven bevel gear 603 through the L-shaped fixing plate 610. The other end of the rotating shaft 609... A second driving bevel gear 608 is fixedly connected to an L-shaped fixing plate 606 and an L-shaped fixing plate 610 at one end. A second driven bevel gear 607 meshes above the second driving bevel gear 608. A threaded rod 605 is fixedly connected to the upper surface of the second driven bevel gear 607 through the L-shaped fixing plate 606. A U-shaped seat 314 is fixedly connected to both ends of the support plate 301. A U-shaped seat 316 is fixedly connected to the center of the outer surface of both ends of the support plate 301. Both sides of the upper surface of both ends of the detection table 1 are fixedly connected to... A limit rod 315 is connected to a connecting plate 4, which is fixedly connected to the other end of the limit rod 315 through the U-shaped seat 314. The upper ends of the threaded rod 604 and the threaded rod 605 both pass through the U-shaped seat 316 and are rotatably connected to the lower surface of the connecting plate 4. When the servo motor 601 is started, its output shaft drives the rotating shaft 609 to rotate. The first driving bevel gear 602 and the second driving bevel gear 608 at both ends of the rotating shaft 609 rotate synchronously, respectively meshing and driving the first driven bevel gear 603 and the second driven bevel gear 607. Support plate 30 1. Descent: The driven bevel gear drives the threaded rod 604 and the threaded rod 605 to rotate synchronously. Since the threaded rod is threadedly connected to the U-shaped seat 316 of the through support plate 301, and the support plate 301 slides along the limit rod 315 through the U-shaped seat 314 to ensure the stability of the lifting direction, the support plate 301 descends smoothly as a whole when the threaded rod rotates, so that the four workpieces are completely immersed in the water in the water tank 2. After the workpieces are immersed in the water, keep observing whether there are continuous bubbles rising from the water surface in each area to check whether the shell is qualified.

[0026] Reference Figure 4 The lower surfaces of sliding plate 302 and sliding plate 304 are both fixedly connected to clamping plates 310. The inner walls of the clamping plates 310 are both fixedly connected to anti-slip pads 311. The lower surface of the support plate 301 is rotatably connected to the rear ends of rack 307 and rack 309. The anti-slip pads 311 on the inner walls of the push rod clamping plates 310 are in close contact with the surface of the battery casing, providing sufficient friction to ensure that the battery casing will not be displaced during the testing process. The rotating column 10 prevents the rack from jamming or shifting during movement, ensuring that the entire clamping process is stable and reliable.

[0027] Reference Figure 2A cross-shaped partition plate 21 is fixedly connected to the inner wall of the water tank 2. A water outlet 7 is opened at the center of the water tank 2. A water outlet pipe 9 extending to one side of the test platform 1 is fixedly connected to the outer side of the lower surface of the water tank 2 near the water outlet 7. A water valve 8 is fixedly connected to the water outlet end of the water outlet pipe 9. Support legs 5 are fixedly connected to both ends of the lower surface of the test platform 1. The cross-shaped partition plate 21 can avoid mutual interference of air bubbles in different areas and improve the accuracy of the test. After the air tightness test of the lithium air battery shell is completed, the water in the water tank 2 needs to be drained. The water valve 8 at the water outlet end of the water outlet pipe 9 is opened. The water at the water outlet 7 at the center of the water tank 2 flows out through the water outlet pipe 9 under the action of gravity. The support legs 5 fixedly connected to both ends of the lower surface of the test platform 1 play the role of supporting the entire test device.

[0028] The working principle and usage process of this utility model are as follows: The extension and retraction of the electric push rod 318 is transmitted to the sliding plate 304 via the moving block 317, causing the sliding plate 304 to move along the sliding rod 305. The rack 309 on the inner side of the sliding plate 304 meshes with the gear 308, causing the gear 308 to rotate. Simultaneously, the gear 308 meshes with the rack 307 on the inner side of the sliding plate 302, thereby driving the sliding plate 302 to move synchronously in the opposite direction along the sliding rod 305, forming a stable clamping effect on the battery casing. The anti-slip pad 311 on the inner wall of the clamping plate 310 increases the static friction with the battery casing, effectively preventing casing displacement during testing. At the same time, the rotating column 10 on the lower surface of the support plate 301 limits the rack, preventing jamming during rack movement. To ensure a smooth and reliable clamping process, the servo motor 601 of the lifting assembly 6 is activated after the housing is clamped. Its output shaft drives the rotating shaft 609 to rotate. The first active bevel gear 602 and the second active bevel gear 608 at both ends of the rotating shaft 609 rotate synchronously and mesh with the corresponding first driven bevel gear 603 and second driven bevel gear 607, respectively, converting the horizontal rotational motion into vertical power to drive the threaded rod 1 604 and the threaded rod 2 605 to rotate synchronously. Since the threaded rod is threadedly connected to the U-shaped seat 2 316 at both ends of the support plate 301, and the support plate 301 slides along the limiting rod 315 through the U-shaped seat 1 314, the limiting rod 315 strictly limits the lifting direction. When the threaded rod rotates, the support plate 301 can be lifted and lowered smoothly as a whole. The precise speed control and positioning capability of the servo motor 601 can accurately adjust the lifting height and speed to ensure that the battery casing is accurately immersed in or removed from the water, providing stable positional conditions for testing. The cross-shaped partition plate 21 inside the water tank 2 divides it into four independent testing areas, each area corresponding to a set of clamping components 3, which can effectively avoid mutual interference of air bubbles in different areas. When the battery casing is immersed in water, if there is an airtightness problem, the generated air bubbles will be confined to the corresponding area, making it easy for the testers to clearly observe and judge whether the casing is qualified. After the test is completed, by opening the water valve 8, the water outlet 7 in the center of the water tank 2, together with the water outlet pipe 9, can quickly drain the water in the tank under the action of gravity. The support leg 5 provides stable support to prevent shaking during the test.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium-air battery casing airtightness testing device, comprising a testing platform (1), characterized in that: A water tank (2) is fixedly connected to the upper surface of the testing platform (1). A lifting assembly (6) is provided at the lower end of the water tank (2). Four sets of clamping assemblies (3) are provided above the water tank (2). Each set of clamping assemblies (3) includes a support plate (301). Connecting seats two (306) are fixedly connected to both sides of one end of the lower surface of the support plate (301). Connecting seat one (303) is fixedly connected to the center of the lower surface of the support plate (301) away from connecting seat two (306). A sliding rod (305) is fixedly connected to the inner wall opposite to the inner wall of connecting seat one (303) and connecting seat two (306). One end of the sliding rod (305) is slidably connected to a sliding plate (302), and the other end of the sliding rod (305) is fixedly connected to a sliding plate (304). The inner side of the sliding plate (302) is fixedly connected to a rack (307), and the inner side of the sliding plate (304) is fixedly connected to a rack (309). The lower surface of the support plate (301) is rotatably connected to a gear (308) near the inner side of the rack (307) and the rack (309). Both sides of the gear (308) are meshed with the rack (307) and the rack (309).

2. The lithium-air battery casing airtightness testing device according to claim 1, characterized in that: A fixed seat (312) is fixedly connected to the center of the upper surface of the support plate (301). Four through sliding grooves (313) are opened on the upper surface of the support plate (301). A moving block (317) is fixedly connected to the center of the upper surface of the sliding plate (304) through the sliding groove (313) and to the upper surface of the support plate (301). An electric push rod (318) is fixedly connected to the inner side of the moving block (317). The other end of the electric push rod (318) is fixedly connected to one side of the fixed seat (312).

3. The lithium-air battery casing airtightness testing device according to claim 1, characterized in that: The lifting assembly (6) includes a servo motor (601), the output shaft of which is fixedly connected to a rotating shaft (609). Both ends of the inner wall of the detection table (1) are fixedly connected to an L-shaped fixing plate (606) and an L-shaped fixing plate (610). One end of the rotating shaft (609) is fixedly connected to a first driving bevel gear (602), and a first driven bevel gear (603) meshes above the first driving bevel gear (602). The upper end of the rotating shaft (609) is fixedly connected to the L-shaped fixing plate (610) by a threaded rod (604). The other end of the rotating shaft (609) is fixedly connected to the L-shaped fixing plate (606) by a second driving bevel gear (608). The second driving bevel gear (607) is meshed above the second driving bevel gear (608). The upper surface of the second driven bevel gear (607) is fixedly connected to the L-shaped fixing plate (606) by a threaded rod (605).

4. The lithium-air battery casing airtightness testing device according to claim 3, characterized in that: Both ends of the support plate (301) are fixedly connected to U-shaped seat one (314), and both ends of the support plate (301) are fixedly connected to U-shaped seat two (316) at the center of the outer surface of both ends. Both sides of the upper surface of both ends of the detection table (1) are fixedly connected to limit rods (315). The other end of the limit rod (315) passes through U-shaped seat one (314) and is fixedly connected to a connecting plate (4). The upper ends of threaded rod one (604) and threaded rod two (605) pass through U-shaped seat two (316) and are rotatably connected to the lower surface of the connecting plate (4).

5. The lithium-air battery casing airtightness testing device according to claim 1, characterized in that: The lower surfaces of the sliding plate 1 (302) and the sliding plate 2 (304) are fixedly connected with clamping plates (310), and the inner walls of the clamping plates (310) are fixedly connected with anti-slip pads (311). The lower surface of the support plate (301) is rotatably connected with rotating columns (10) near the rear ends of rack 1 (307) and rack 2 (309).

6. The lithium-air battery casing airtightness testing device according to claim 1, characterized in that: The inner wall of the water tank (2) is fixedly connected with a cross partition plate (21). A water outlet (7) is opened at the center of the water tank (2). A water outlet pipe (9) extending to one side of the test platform (1) is fixedly connected to the outer side of the lower surface of the water tank (2) near the water outlet (7). A water valve (8) is fixedly connected to the water outlet end of the water outlet pipe (9). Support legs (5) are fixedly connected to both ends of the lower surface of the test platform (1).

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