Airtightness detection tool for battery
By designing a testing fixture with hydraulic drive and threaded transmission, the problem of existing devices being unable to adapt to the airtightness testing of batteries of different sizes was solved, and stable clamping and accurate leakage detection of batteries of different sizes were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN SHENGJINTE AUTO PARTS
- Filing Date
- 2025-08-12
- Publication Date
- 2026-08-04
AI Technical Summary
Existing airtightness testing devices cannot adapt to batteries of different sizes, making it impossible to effectively test the battery's airtightness.
A testing fixture was designed, comprising a hydraulic cylinder, a hydraulic push rod, a lifting plate, a sliding sleeve block, a sliding rod, a rotating motor, a bidirectional threaded rod, a threaded sleeve block, and a clamping plate. It achieves stable clamping of batteries of different sizes through hydraulic drive and threaded transmission, and uses a pressure gauge to monitor the inlet and outlet pressure difference in real time to detect air leakage.
It enables stable clamping and effective airtightness testing of batteries of different sizes, improving the applicability and accuracy of the testing.
Smart Images
Figure CN224594141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of airtightness testing fixtures, specifically an airtightness testing fixture for batteries. Background Technology
[0002] As one of the core components of an electric vehicle, the safety of the battery system directly affects the overall performance and driving safety of the vehicle. To ensure the battery system can supply power safely, the power battery pack must have strong dustproof and waterproof capabilities to prevent dust and water from entering the battery pack and causing short circuits, resulting in danger, significant losses, or even threatening the personal safety of the driver and passengers. Therefore, the battery system's sealing is generally tested before leaving the factory.
[0003] Currently, existing airtightness devices can only test batteries of the same size, but cannot clamp batteries of different sizes, making it inconvenient to test batteries of different sizes.
[0004] Therefore, a tooling for testing the airtightness of batteries is proposed to address the above problems. Summary of the Invention
[0005] The purpose of this utility model is to provide a fixture for testing the airtightness of batteries, including a mounting base plate. A mounting frame is provided on the upper right side of the mounting base plate. A hydraulic cylinder is located at the top center of the mounting frame. A hydraulic push rod is located below the hydraulic cylinder, penetrating the mounting frame and extending to connect with a lifting plate below the mounting frame. Sliding blocks are respectively provided on both sides of the lifting plate, and the sliding blocks are fitted onto sliding rods. The sliding rods are located within a groove two opened inside the mounting frame. An outer shell is provided below the lifting plate, and an inflation device is installed inside the outer shell. An air intake pipe is installed on the mounting base plate. It passes through the outer casing and extends to the bottom of the outer casing to connect with the air intake port. A pressure gauge is installed on the air intake pipe. A groove is provided on each of the two sides above the mounting base plate. A bidirectional threaded rod is installed inside the groove. One side of the bidirectional threaded rod is connected to a rotating motor. Threaded sleeves are fitted on both ends of the bidirectional threaded rod. Clamping plates are installed on the threaded sleeves. An air suction device is installed on the upper left side of the mounting base plate. An air outlet pipe on the air suction device passes through the mounting frame and extends into the mounting frame to connect with the air outlet port. A pressure gauge is installed on the air outlet pipe.
[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model incorporates a hydraulic cylinder, a hydraulic push rod, a lifting plate, sliding blocks, and a sliding rod. The hydraulic cylinder extends the hydraulic push rod, which in turn lowers the lifting plate. The lowering of the lifting plate lowers the air inlet, facilitating battery charging. As the lifting plate descends, the sliding blocks on both sides slide on the sliding rod, improving sliding stability.
[0007] This utility model incorporates a rotating motor, a bidirectional threaded rod, a threaded sleeve block, and a clamping plate. The rotating motor drives the bidirectional threaded rod to rotate, which in turn moves the threaded sleeve block, which in turn moves the clamping plate, thus facilitating the clamping of batteries of different sizes.
[0008] This invention features pressure gauge 1 and pressure gauge 2, which enable real-time monitoring of the intake and exhaust pressures, facilitating the detection of battery leaks via pressure difference. Attached Figure Description
[0009] Figure 1 is a schematic diagram of the external structure of this utility model; Figure 2 is a schematic diagram of the internal structure of this utility model.
[0010] The reference numerals and names in the figure are as follows: 1. Mounting base plate; 101. Groove 1; 2. Support leg; 3. Control panel; 4. Mounting frame; 401. Groove 2; 5. Hydraulic cylinder; 6. Hydraulic push rod; 7. Lifting plate; 8. Sliding rod; 9. Sliding sleeve block; 10. Outer shell; 11. Inflation device; 12. Air inlet pipe; 13. Air inlet connection port; 14. Pressure gauge 1; 15. Two-way threaded rod; 16. Threaded sleeve block; 17. Clamping plate; 18. Rotating motor; 19. Air intake device; 20. Air outlet pipe; 21. Air outlet connection port; 22. Pressure gauge 2; 23. Battery. Detailed Implementation
[0011] 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.
[0012] As attached Figure 1 , 2As shown, this utility model provides a battery airtightness testing fixture, including a mounting base plate 1. A mounting frame 4 is arranged on the upper right side of the mounting base plate 1. A hydraulic cylinder 5 is arranged at the top center of the mounting frame 4. A hydraulic push rod 6 is arranged below the hydraulic cylinder 5, penetrating the mounting frame 4 and extending to connect with a lifting plate 7 below the mounting frame 4. Sliding sleeves 9 are respectively arranged on both sides of the lifting plate 7, and the sliding sleeves 9 are fitted onto sliding rods 8. The sliding rods 8 are arranged in a groove 401 opened inside the mounting frame 4. A housing 10 is arranged below the lifting plate 7, and an inflation device 11 is arranged inside the housing 10. An air inlet pipe 12 is arranged below the inflation device 11. A pressure gauge 14 is installed on the air intake pipe 12, which penetrates the outer casing 10 and extends to the bottom of the outer casing 10 to connect with the air intake port 13. A groove 101 is opened on both sides of the upper part of the mounting base plate 1. A bidirectional threaded rod 15 is installed inside the groove 101. One side of the bidirectional threaded rod 15 is connected to the rotating motor 18. Threaded sleeve blocks 16 are respectively fitted on both ends of the bidirectional threaded rod 15. Clamping plates 17 are installed on the threaded sleeve blocks 16. An air suction device 19 is installed on the upper left side of the mounting base plate 1. An air outlet pipe 20 installed on the air suction device 19 penetrates the mounting frame 4 and extends into the mounting frame 4 to connect with the air outlet port 21. A pressure gauge 22 is installed on the air outlet pipe 20.
[0013] Specifically, support legs 3 are provided at the four corners below the mounting base plate 1.
[0014] Specifically, the two ends of the bidirectional threaded rod 15 are respectively set in two grooves 101.
[0015] Specifically, a battery 23 is clamped between two clamping plates 17, with the air inlet of the battery 23 corresponding to the position of the air inlet connection port 13, and the air outlet of the battery 23 corresponding to the position of the position of the air outlet connection port 21.
[0016] Specifically, a control panel 3 is provided on the right side of the outer surface of the mounting base plate 1. The control panel 3 is electrically connected to the inflation device 11, pressure gauge 14, rotating motor 18, suction device 19, and pressure gauge 22.
[0017] Working principle: In use, battery 23 is placed on mounting base plate 1. Motor 18 rotates, driving bidirectional threaded rod 15 to rotate. The rotation of bidirectional threaded rod 15 moves threaded sleeve 16, which in turn moves clamping plate 17 to clamp battery 23. Then, hydraulic cylinder 5 extends hydraulic push rod 6, which in turn lowers lifting plate 7. The lowering of lifting plate 7 lowers air inlet 13, connecting it to the air inlet of battery 23. As lifting plate 7 lowers, sliding sleeves 9 on both sides slide... Sliding on rod 8 improves sliding stability. Manually move air intake device 19 to connect air outlet 21 with battery air outlet. After all connections are completed, start inflation device 11 to send gas into battery 23 through air intake pipe 12. Use pressure gauge 14 to record the air intake pressure. After inflation is complete, use air intake device 19 to extract gas from battery 23 through air outlet pipe 20. Use pressure gauge 22 to record the air outlet pressure. By detecting the pressure difference between air intake pressure and air outlet pressure, determine whether the battery is leaking.
[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model 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 limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.
Claims
1. A fixture for testing the airtightness of batteries, comprising a mounting base plate (1), characterized in that: An installation frame (4) is provided on the upper right side of the mounting base plate (1). A hydraulic cylinder (5) is provided at the top center of the mounting frame (4). A hydraulic push rod (6) is provided below the hydraulic cylinder (5). The hydraulic push rod (6) passes through the mounting frame (4) and extends to the bottom of the mounting frame (4) to connect with the lifting plate (7). Sliding sleeves (9) are provided on both sides of the lifting plate (7). The sliding sleeves (9) are fitted on the sliding rod (8). The sliding rod (8) is located in the groove (401) opened on the inner side of the mounting frame (4). An outer shell (10) is provided below the lifting plate (7). An inflation device (11) is provided inside the outer shell (10). An air inlet pipe (12) provided below the inflation device (11) passes through the outer shell (10) and extends to the bottom of the outer shell (10). 10) The lower part is connected to the air inlet (13). A pressure gauge (14) is provided on the air inlet pipe (12). A groove (101) is provided on both sides of the upper part of the mounting base plate (1). A bidirectional threaded rod (15) is provided inside the groove (101). One side of the bidirectional threaded rod (15) is connected to the rotating motor (18). Threaded sleeves (16) are provided on both ends of the bidirectional threaded rod (15). A clamping plate (17) is provided on the threaded sleeves (16). An air suction device (19) is provided on the upper left side of the mounting base plate (1). An air outlet pipe (20) provided on the air suction device (19) passes through the mounting frame (4) and extends into the mounting frame (4) to connect with the air outlet (21). A pressure gauge (22) is provided on the air outlet pipe (20).
2. The airtightness testing fixture for batteries according to claim 1, characterized in that: Support legs (2) are provided at the four corners below the mounting base plate (1).
3. The airtightness testing fixture for batteries according to claim 1, characterized in that: The two ends of the bidirectional threaded rod (15) are respectively set in two grooves (101).
4. The airtightness testing fixture for batteries according to claim 1, characterized in that: A battery (23) is held between two clamping plates (17). The air inlet of the battery (23) is positioned corresponding to the air inlet connection port (13), and the air outlet of the battery (23) is positioned corresponding to the air outlet connection port (21).
5. The airtightness testing fixture for batteries according to claim 1, characterized in that: The mounting base plate (1) has a control panel (3) on the right side of its outer surface. The control panel (3) is electrically connected to the inflation device (11), pressure gauge one (14), rotating motor (18), air intake device (19), and pressure gauge two (22).