Battery pack air tightness detection device

Abstract

The utility model relates to the technical field of battery pack air tightness detection, and discloses a battery pack air tightness detection device which comprises a detection box, a door plate is arranged on the side wall of the detection box, an air pump is fixedly connected to the upper surface of the detection box, and the output end of the air pump is fixedly connected with a connecting pipe. One end of the connecting pipe is fixedly connected to the interior of the detection box, a pressure detector is fixedly connected to the upper surface of the detection box, a fixing assembly is arranged in the detection box, a sealing assembly is arranged on the side wall of the detection box, the fixing assembly comprises a fixing table, and the lower surface of the fixing table is fixedly connected to the interior of the detection box. According to the battery pack clamping device, the hydraulic rod is started to drive the sliding block on one side to slide through the second fixing block, the rack drives the gear to rotate, and therefore the sliding block on the other side slides, the effect that the clamping degree of the clamping plates can be freely adjusted according to the size of a battery pack is achieved, and the practicability of the device is improved through the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack air tightness detection, in particular to a battery pack air tightness detection device. Background Art

[0002] With the booming development of new energy vehicles, the battery pack, as a core component, is crucial for its performance and safety. The sealing of the battery pack directly affects the battery's service life and safety. Poor airtightness can lead to energy loss and even serious safety accidents. Therefore, rigorous airtightness testing of battery packs is required during the production process to ensure their quality and performance. With the continuous expansion of the new energy vehicle market and advancements in technology, the demand for battery pack airtightness testing equipment is also increasing, and these equipment faces higher requirements in terms of accuracy, efficiency, and adaptability.

[0003] Existing battery pack air-tightness testing devices typically consist of a test chamber, an inflation system, and a pressure monitoring system. The test chamber houses the battery pack, providing a relatively closed testing environment. The inflation system is used to fill the chamber with a gas, such as compressed air, at a specific pressure. The pressure monitoring system uses sensors to monitor pressure changes within the chamber in real time. These systems operate based on the principles of gas molecular diffusion and pressure equilibrium. When the battery pack is well sealed, the internal gas pressure remains stable. Conversely, if a leak is detected, gas will gradually escape from the leak, causing the internal pressure to drop.

[0004] Existing battery pack air tightness testing devices usually use fixed-size clamps to fix the battery pack. The structure of the clamp cannot be freely adjusted according to the size of the battery pack. This results in loose fixation when testing battery packs of different specifications, affecting the accuracy of the test results. Therefore, a battery pack air tightness testing device is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a battery pack air tightness detection device, which aims to improve the problem in the prior art that when fixing the battery pack, a fixed-size clamp is usually used, which leads to loose fixation when testing battery packs of different specifications, affecting the accuracy of the test results.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A battery pack air tightness testing device includes a testing box, a door panel is provided on the side wall of the testing box, an air pump is fixedly connected to the upper surface of the testing box, a connecting pipe is fixedly connected to the output end of the air pump, one end of the connecting pipe is fixedly connected to the interior of the testing box, a pressure detector is fixedly connected to the upper surface of the testing box, a fixing assembly is provided inside the testing box, and a sealing assembly is provided on the side wall of the testing box;

[0008] The fixing assembly includes a fixing table, the lower surface of the fixing table is fixedly connected to the inside of the detection box, the upper surface of the fixing table is fixedly connected to a fixing plate, the inside of the fixing plate is fixedly connected to a fixing rod, the upper surface of the fixing table is fixedly connected to a mounting plate, the upper surface of the mounting plate is rotatably connected to a gear, the side wall of the fixing rod is slidably connected to a slider, the upper surface of the slider is fixedly connected to a fixing block 1, one side wall of the fixing block is fixedly connected to a splint, one side wall of the fixing block is fixedly connected to a fixing sleeve, the inside of the fixing sleeve is fixedly connected to a rack, the lower surface of the fixing table is fixedly connected to a hydraulic rod, the output end of the hydraulic rod is fixedly connected to a fixed block 2, and the upper surface of the fixing table is fixedly connected to a placement table;

[0009] As a further description of the above technical solution:

[0010] The sealing assembly includes a sealing gasket, a side wall of the sealing gasket is fixedly connected to the side wall of the door panel, the side wall of the door panel is slidably connected to the inside of the detection box, and the side wall of the door panel is fixedly connected to a hook;

[0011] As a further description of the above technical solution:

[0012] The gear is meshed with the rack, and the upper surface of the second fixing block is fixedly connected to the lower surface of the slider on one side;

[0013] As a further description of the above technical solution:

[0014] The side wall of the detection box is fixedly connected to a fixing block three, and the side wall of the fixing block three is rotatably connected to a handle;

[0015] As a further description of the above technical solution:

[0016] The side wall of the handle is rotatably connected to a rotating sleeve, and the interior of the rotating sleeve is slidably connected to a sliding plate;

[0017] As a further description of the above technical solution:

[0018] The side wall of the sliding plate is fixedly connected to a connecting rod, and the side wall of the connecting rod is slidably connected to the inside of the rotating sleeve;

[0019] As a further description of the above technical solution:

[0020] One end of the connecting rod is fixedly connected to a clamping sleeve, and the side wall of the clamping sleeve is slidably connected to the side wall of the hook;

[0021] As a further description of the above technical solution:

[0022] The side wall sleeve of the connecting rod is provided with a spring, one end of the spring is fixedly connected to the side wall of the sliding plate, and the other end of the spring is fixedly connected to the inside of the rotating sleeve.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the utility model, by starting the hydraulic rod to drive the slider on one side to slide through the fixed block 2, the rack drives the gear to rotate, and the slider on the other side to slide, thereby achieving the effect of freely adjusting the clamping degree of the splint according to the size of the battery pack. This solves the problem that some battery pack air tightness detection devices usually use fixed-size clamps when fixing the battery pack, and their structure cannot be freely adjusted according to the size of the battery pack. This leads to the problem of loose fixation when detecting battery packs of different specifications, affecting the accuracy of the detection results. The practicality of the equipment is improved through the above structure.

[0025] 2. In the utility model, the sealing effect between the door panel and the detection box is improved by a sealing gasket. By placing the card sleeve into the side wall of the hook and then turning the handle to contract the spring to tighten the card sleeve, the fastening effect of the door panel is further enhanced, thereby achieving the goal of not needing to directly connect the battery pack and being applicable to battery packs of different interface types, with strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a three-dimensional schematic diagram of a battery pack air tightness detection device proposed in the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of a test box for a battery pack air tightness test device proposed in the present invention;

[0028] Figure 3 This is a schematic structural diagram of a fixing platform for a battery pack air tightness detection device proposed in the present invention;

[0029] Figure 4 This is a structural schematic diagram of a rotating sleeve of a battery pack air tightness detection device proposed in the utility model.

[0030] Legend:

[0031] 1. Test box; 2. Door panel; 3. Air pump; 4. Connecting pipe; 5. Pressure detector; 6. Fixing table; 7. Fixing plate; 8. Fixing rod; 9. Mounting plate; 10. Gear; 11. Slider; 12. Fixing block 1; 13. Clamping plate; 14. Fixing sleeve; 15. Rack; 16. Hydraulic rod; 17. Fixing block 2; 18. Placement table; 19. Hook; 20. Fixing block 3; 21. Handle; 22. Rotating sleeve; 23. Sliding plate; 24. Connecting rod; 25. Sleeve; 26. Spring; 27. Sealing gasket. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Reference Figure 1 、 Figure 2 and Figure 3The utility model provides an embodiment: a battery pack air tightness detection device, including a detection box 1, which provides a closed space environment for the entire detection process to prevent external factors from interfering with the detection results. The side wall of the detection box 1 is provided with a door panel 2, and the upper surface of the detection box 1 is fixedly connected to an air pump 3. The air pump 3 is used to fill the detection box 1 with gas to create conditions for detecting the air tightness of the battery pack and to achieve the required pressure environment in the detection box 1. The output end of the air pump 3 is fixedly connected to a connecting pipe 4, which plays the role of transmitting gas. One end of the connecting pipe 4 is fixedly connected to the inside of the detection box 1. The upper surface of the detection box 1 is fixedly connected to a pressure detector 5. The pressure detector 5 can monitor the pressure changes in the detection box 1 in real time, so as to judge whether the battery pack has an air tightness problem based on the pressure data. A fixed component is provided inside the detection box 1, and the fixed component includes a fixed platform 6. The fixed platform 6 provides a stable installation base for the entire fixed component, and its lower surface is fixedly connected to the inside of the detection box 1. The upper surface of the fixed platform 6 is fixedly connected to a fixed plate 7, and a fixed rod 8 is fixedly connected to the interior of the fixed plate 7. The upper surface of the fixed platform 6 is fixedly connected to a mounting plate 9, which provides rotational support for the gear 10. The upper surface of the mounting plate 9 is rotatably connected to the gear 10, and the side wall of the fixed rod 8 is slidably connected to a slider 11, which can slide on the fixed rod 8. The upper surface of the slider 11 is fixedly connected to a fixed block 12, and the side wall of the fixed block 12 is fixedly connected to a clamping plate 13. The battery pack is clamped by the relative movement of the clamping plates 13 on both sides to ensure the stability of the battery pack during testing. The side wall of the fixed block 12 is fixedly connected to a fixed sleeve 14, which is used to fix a rack 15. The interior of the fixed sleeve 14 is fixedly connected to the rack 15, and the rack 15 is meshed with the gear 10. When the gear 10 rotates, the slider 11 is driven to move by the rack 15, thereby realizing the clamping or loosening action of the clamping plate 13 on the battery pack. The lower surface of the fixed platform 6 is fixedly connected to a hydraulic rod 16, and the output end of the hydraulic rod 16 is fixedly connected to a fixed block 17. The upper surface of the fixed platform 6 is fixedly connected to a placement platform 18, which is used to place the battery pack and provide an initial placement position for the battery pack. The side wall of the test box 1 is provided with a sealing assembly to enhance the sealing performance of the test box 1;

[0034] When using the equipment for air tightness testing, first place the battery pack on the placement table 18. The placement table 18 provides a stable placement surface for the battery pack to ensure that the battery pack is accurately positioned and will not shake randomly during subsequent operations. Then, by starting the hydraulic rod 16, the contraction of the hydraulic rod 16 allows the fixed block 2 17 to slide. The fixed block 2 17 moves stably under the drive of the hydraulic rod 16. Its function is to transmit the movement of the hydraulic rod 16 to the slider 11, driving the slider 11 on one side to slide. The slider 11 slides along the fixed rod 8, thereby allowing the rack 15 to slide inside the fixed sleeve 14. The rack 15 slides stably in the fixed sleeve 14, thereby allowing the gear 10 to rotate. The gear 10 rotates stably on the mounting plate 9 and engages with the rack 15. The linear motion of the rack 15 is converted into its own circular motion, realizing the conversion of force and motion form, driving the rack 15 on the other side to slide, and the rack 15 on the other side also slides in the fixed sleeve 14, ensuring the continuity and stability of the entire transmission process, so that the slider 11 on the other side can slide, and the sliding of the slider 11 on the other side cooperates with the sliding of the previous slider 11 to realize the symmetrical driving of the splint 13, and then let the splint 13 clamp the battery pack. The splint 13 directly contacts the battery pack, and through the relative movement of the splints 13 on both sides, the battery pack is tightly clamped and firmly fixed on the placement table 18, avoiding the displacement of the battery pack due to internal gas filling during the detection process, thereby ensuring the accuracy of the airtightness test results.

[0035] Reference Figure 2 and Figure 4The sealing assembly includes a gasket 27, the side walls of which are fixedly connected to the side walls of the door panel 2. The gasket 27 can fill the gap between the door panel 2 and the test box 1, effectively preventing gas leakage from the contact point between the door panel 2 and the test box 1, and ensuring the airtightness of the test box 1. The side walls of the door panel 2 are slidably connected to the inside of the test box 1. The door panel 2 facilitates the operator to open or close the test box 1 and to facilitate the placement or removal of the battery pack from the test box 1. The side walls of the door panel 2 are fixedly connected to a hook 19, which is used to cooperate with the sleeve 25 to lock the door panel 2. The side walls of the test box 1 are fixedly connected to a fixed block 3 20, which provides a rotation support point for the handle 21, ensuring that the handle 21 can rotate stably around it. The side wall of the fixed block three 20 is rotatably connected to a handle 21, and the locking and unlocking operations of the door panel 2 are achieved by rotating the handle 21. The side wall of the handle 21 is rotatably connected to a rotating sleeve 22, and a sliding plate 23 is slidably connected inside the rotating sleeve 22. The sliding plate 23 can slide in the rotating sleeve 22. When the handle 21 is rotated, the sliding plate 23 will move in the rotating sleeve 22 under the action of force, thereby driving the connecting rod 24 to move. The side wall of the sliding plate 23 is fixedly connected with a connecting rod 24, which serves to connect the sliding plate 23 and the clamping sleeve 25. The side wall of the connecting rod 24 is slidably connected to the inside of the rotating sleeve 22. One end of the connecting rod 24 is fixedly connected with the clamping sleeve 25. The side wall of the clamping sleeve 25 is slidably connected to the side wall of the hook 19. The clamping sleeve 25 and the hook 19 cooperate with each other. When the clamping sleeve 25 is sleeved on the hook 19, the door panel 2 is locked. The side wall of the connecting rod 24 is sleeved with a spring 26. One end of the spring 26 is fixedly connected to the side wall of the sliding plate 23, and the other end of the spring 26 is fixedly connected to the inside of the rotating sleeve 22.

[0036] After the battery pack is fixed, the door panel 2 is then closed so that the sealing gasket 27 fits against the inner wall of the test box 1. The sealing gasket 27 tightly fills the tiny gap between the door panel 2 and the inner wall of the test box 1, effectively preventing gas from leaking from this contact surface, thereby creating a relatively closed space environment for testing. Subsequently, the sleeve 25 is placed on the side wall of the hook 19, and the handle 21 is turned to drive the rotating sleeve 22 to rotate. The rotating sleeve 22 is driven by the handle 21 to make a circular motion around the connection point with the handle 21, thereby causing the sliding plate 23 to slide. The sliding plate 23 slides within the rotating sleeve 22. This sliding design can convert the rotational motion of the rotating sleeve 22 into linear motion, causing the connecting rod 24 to slide. The connecting rod 24 moves as the sliding plate 23 slides, accurately transmitting the displacement of the sliding plate 23 to the sleeve 25. The spring 26 is compressed, causing the sleeve 25 to tighten the hook 19, further tightening the door panel 2. This creates a tighter connection between the sleeve 25 and the hook 19, significantly enhancing the securement of the door panel 2. This ensures that the door panel 2 will not loosen during testing, even if affected by factors such as internal air pressure fluctuations, thereby maintaining the airtightness of the test box 1. Subsequently, the air pump 3 is activated to inflate the interior of the test box 1. Acting as a gas supply, the air pump 3 generates and delivers gas at sufficient pressure into the test box 1. It steadily outputs gas according to set parameters, gradually increasing the air pressure within the test box 1 to a level suitable for airtightness testing. The pressure detector 5 then indirectly determines the airtightness of the battery pack by monitoring changes in parameters such as gas pressure and concentration within the container. The pressure detector 5 has high-precision detection capabilities, enabling it to accurately measure even small changes in gas pressure and concentration within the test box 1 in real time. If the battery pack leaks, the leaked gas will enter the test box 1, causing the pressure to increase or the concentration of the test gas to change. When a leak occurs in the battery pack, the internal gas enters the test box 1 through the leak, disrupting the previously stable pressure and concentration balance within the test box 1. This pressure increase is detected by the pressure detector 5, and changes in concentration can also be detected by appropriate testing methods. Analysis of these changes can determine whether the battery pack's airtightness meets the requirements. This structure eliminates the need for direct connection to the battery pack, preventing damage to the battery pack interface caused by such connection. Furthermore, it is applicable to battery packs with different interface types, providing high versatility.

[0037] Working principle: When using the device for air tightness testing, first place the battery pack on the placement table 18, then start the hydraulic rod 16. The contraction of the hydraulic rod 16 causes the fixed block 17 to slide, driving the slider 11 on one side to slide, thereby allowing the rack 15 to slide inside the fixed sleeve 14, and then allowing the gear 10 to rotate, driving the rack 15 on the other side to slide, thereby allowing the slider 11 on the other side to slide, and then allowing the splint 13 to clamp the battery pack, and then close the door panel 2 to make the sealing gasket 27 fit the inner wall of the test box 1, and then by placing the clamping sleeve 25 on the hook 19 The side wall is then rotated by rotating the handle 21 to drive the rotating sleeve 22 to rotate, thereby causing the sliding plate 23 to slide, causing the connecting rod 24 to slide, squeezing the spring 26, causing the clamping sleeve 25 to tighten the hook 19, and further tightening the door panel 2. Subsequently, the inside of the detection box 1 is filled with gas by starting the air pump 3, and the pressure detector 5 detects changes in parameters such as gas pressure and concentration in the container to indirectly judge the air tightness of the battery pack. If the battery pack leaks, the leaked gas will enter the detection box 1, causing the pressure in the detection box 1 to increase or the concentration of the detection gas to change.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A battery pack air tightness detection device, comprising a detection box (1), characterized in that: The side wall of the detection box (1) is provided with a door panel (2), the upper surface of the detection box (1) is fixedly connected to an air pump (3), the output end of the air pump (3) is fixedly connected to a connecting pipe (4), one end of the connecting pipe (4) is fixedly connected to the inside of the detection box (1), the upper surface of the detection box (1) is fixedly connected to a pressure detector (5), the inside of the detection box (1) is provided with a fixing assembly, and the side wall of the detection box (1) is provided with a sealing assembly; The fixing assembly includes a fixing platform (6), the lower surface of the fixing platform (6) is fixedly connected to the inside of the detection box (1), the upper surface of the fixing platform (6) is fixedly connected to a fixing plate (7), the inside of the fixing plate (7) is fixedly connected to a fixing rod (8), the upper surface of the fixing platform (6) is fixedly connected to a mounting plate (9), the upper surface of the mounting plate (9) is rotatably connected to a gear (10), the side wall of the fixing rod (8) is slidably connected to a slider (11), the upper surface of the slider (11) is fixedly connected to a fixing block 1 (12), the side wall of the fixing block 1 (12) is fixedly connected to a clamping plate (13), the side wall of the fixing block 1 (12) is fixedly connected to a fixing sleeve (14), the inside of the fixing sleeve (14) is fixedly connected to a rack (15), the lower surface of the fixing platform (6) is fixedly connected to a hydraulic rod (16), the output end of the hydraulic rod (16) is fixedly connected to a fixing block 2 (17), and the upper surface of the fixing platform (6) is fixedly connected to a placement platform (18).

2. The battery pack air tightness detection device according to claim 1, characterized in that: The sealing assembly comprises a sealing gasket (27), the side wall of the sealing gasket (27) is fixedly connected to the side wall of the door panel (2), the side wall of the door panel (2) is slidably connected to the inside of the detection box (1), and the side wall of the door panel (2) is fixedly connected with a hook (19).

3. The battery pack air tightness detection device according to claim 1, characterized in that: The gear (10) is meshed with the rack (15), and the upper surface of the second fixed block (17) is fixedly connected to the lower surface of the slider (11) on one side.

4. The battery pack air tightness detection device according to claim 2, characterized in that: The side wall of the detection box (1) is fixedly connected to a fixing block three (20), and the side wall of the fixing block three (20) is rotatably connected to a handle (21).

5. The battery pack air tightness detection device according to claim 4, characterized in that: The side wall of the handle (21) is rotatably connected to a rotating sleeve (22), and the interior of the rotating sleeve (22) is slidably connected to a sliding plate (23).

6. The battery pack air tightness detection device according to claim 5, characterized in that: The side wall of the sliding plate (23) is fixedly connected to a connecting rod (24), and the side wall of the connecting rod (24) is slidably connected to the inside of the rotating sleeve (22).

7. The battery pack air tightness detection device according to claim 6, characterized in that: One end of the connecting rod (24) is fixedly connected to a clamping sleeve (25), and the side wall of the clamping sleeve (25) is slidably connected to the side wall of the hook (19).

8. The battery pack air tightness detection device according to claim 7, characterized in that: The side wall sleeve of the connecting rod (24) is provided with a spring (26), one end of the spring (26) is fixedly connected to the side wall of the sliding plate (23), and the other end of the spring (26) is fixedly connected to the inside of the rotating sleeve (22).

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