Air tightness detection device for upper cover of battery case

Abstract

The utility model discloses a battery case upper cover airtightness detection device, which comprises an operation station and a detection station, and is characterized in that the detection station comprises a support structure which comprises a front support frame and a rear support frame and is used for supporting and placing other structural components of the detection station; the feeding structure is arranged above the bracket structure and is used for feeding the upper cover of the battery case to be detected into a detection position; the lower die structure is arranged above the feeding structure and is used for placing the upper cover of the battery shell and blocking the lower part; the sealing structure is arranged above the rear side of the bracket structure and is used for providing driving force for detection plugging of the upper cover of the battery shell; the upper die structure is arranged below the sealing structure and is used for blocking the detection of the upper cover of the battery shell; the upper die structure is pressed downwards through the pressing air cylinder to be attached to the interior of the upper cover of the battery shell, the upper die structure is tightly pressed on the upper die structure through the gas-liquid pressure cylinder, and therefore the sealing performance of the detection device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery casing cover testing, and in particular to a battery casing cover airtightness testing device. Background Technology

[0002] The core power source of new energy electric vehicles lies in their battery packs. The energy density, safety, and reliability of the battery pack directly determine the driving range, safety assurance, and lifespan of the electric vehicle. Among the safety aspects of the battery pack, waterproof and dustproof sealing is crucial. Therefore, airtightness testing is a key step in ensuring battery pack safety, especially after battery pack repair or disassembly, when overall airtightness testing is indispensable.

[0003] Air tightness testing mainly focuses on the upper and lower shells, interfaces, and connecting components of the battery pack to ensure that the inside of the battery pack is not invaded by external dust, moisture, and other impurities, thereby preventing safety accidents such as short circuits and explosions.

[0004] Therefore, battery manufacturers and vehicle manufacturers typically require battery packs to meet an IP67 rating or higher for airtightness. Consequently, battery casing airtightness testing fixtures need to adapt to higher testing pressures (up to 2MPa) and more complex casing structures (such as irregular curved surfaces and multi-hole designs).

[0005] Because the battery casing cover is an irregular surface, traditional clamps rely on manual positioning, which is inefficient and can easily cause wear on the casing interface and poor sealing of the entire casing interface mounting surface. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a battery case cover airtightness detection device, which can solve the following technical problems: Since the battery case cover is an irregular surface, traditional clamps rely on manual positioning, which is inefficient and easily causes wear on the shell interface and poor sealing of the entire shell interface mounting surface.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a battery casing cover airtightness detection device, including an operation station and a detection station, wherein the detection station includes...

[0008] The support structure, including a front support frame and a rear support frame, is used to support and place other structural components of the testing station;

[0009] The feed structure is located above the support structure and is used to send the top cover of the battery case to be tested into the testing position;

[0010] The lower mold structure is located above the feeding structure and is used for placing the battery case cover and sealing the bottom.

[0011] A sealing structure, located above the rear side of the support structure, is used to provide driving force for the detection and sealing of the battery casing cover;

[0012] The upper mold structure, located below the sealing structure, is used to seal the inspection of the battery casing cover.

[0013] As a preferred technical solution of this utility model, the operating station includes a gas storage tank and an operating cabinet. The gas storage tank is placed on one side of the operating cabinet, and a display panel and a controller are provided on the internal frame of the operating cabinet.

[0014] In a preferred embodiment of this invention, the front support frame is fixed in front of the rear support frame.

[0015] As a preferred technical solution of this utility model, the feeding structure includes a pushing cylinder and a slide rail. The pushing cylinder and the slide rail are fixed on the top surface of the front support frame and the rear support frame. There are two slide rails, symmetrically located on both sides of the slide rail. The extension end of the pushing cylinder points to the front end. An L-shaped connecting plate is fixed in front of the pushing cylinder. A slider is provided on the top surface of the slide rail.

[0016] As a preferred technical solution of this utility model, the lower mold structure includes a bottom frame, which is fixed to the top of the slider, and the L-shaped connecting plate is fixedly connected to the bottom surface of the bottom frame. The top surface of the bottom frame is provided with a plurality of supporting blocks for supporting the bottom irregular buffer pad provided on the top surface of the bottom frame. The top surface of the supporting blocks is provided with mounting holes, and the bottom surface of the bottom irregular buffer pad is provided with movable blocks placed inside the mounting holes.

[0017] As a preferred technical solution of this utility model, the testing station further includes a sealing structure, which includes a telescopic cylinder. The telescopic cylinder is located on the side of the bottom frame, and a soft sealing head is fixed to the telescopic end of the telescopic cylinder. The soft sealing head is connected to the bottom irregular buffer pad.

[0018] As a preferred embodiment of the present invention, the sealing structure includes a support frame, the top surface of the rear support frame is fixed with the support frame, the top surface of the support frame is symmetrically provided with four guide components and four gas-liquid booster cylinders, and the middle part of the top surface of the support frame is fixed with a downward pressure cylinder.

[0019] As a preferred technical solution of this utility model, the upper mold structure includes a top frame, the guide component, the gas-liquid booster cylinder, and the lower pressure cylinder are all fixedly connected to the top frame, and a top irregular-shaped buffer pad is provided at the bottom of the top frame, and multiple air inlets are installed on the top irregular-shaped buffer pad.

[0020] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0021] 1. The battery casing cover of a large component is inspected through a separately set inspection station. The battery casing cover is supported by a bottom irregularly shaped buffer pad. The bottom irregularly shaped buffer pad has the shape of the outer shell of the battery casing cover, which enables the battery casing cover to be accurately positioned. The battery casing cover can be sent to the inspection position through the feeding structure. The upper mold structure is pressed down and fitted into the inside of the battery casing cover by the pressing cylinder. The upper mold structure is pressed tightly onto the upper mold structure by the air-hydraulic booster cylinder, thereby ensuring the sealing of the inspection device.

[0022] 2. By designing a sealing structure on the side of the bottom frame, the opening of the battery casing cover is sealed, ensuring the accuracy of the test.

[0023] 3. After the lower mold structure and the upper mold structure are closed, the edge of the battery case cover is squeezed and sealed by the edges of the lower mold structure and the upper mold structure. After a certain amount of air is introduced between the upper mold structure and the battery case cover through the air inlet, the pressure is maintained for a period of time. If the battery case cover leaks air, the gas will reach between the lower mold structure and the battery case cover through the air hole, thus reducing the pressure. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the airtightness testing device of this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the detection station below the present invention.

[0026] Figure 3 This is a three-dimensional structural diagram of the detection station above the present invention.

[0027] Figure 4 For this utility model Figure 3 A magnified view of the structure at point A in the middle;

[0028] Figure 5 This is a schematic diagram of the inspection station structure from below in this utility model;

[0029] Figure 6 This is a top view of the testing station structure of this utility model;

[0030] The components include: 1. Operating station; 1101. Gas storage tank; 1102. Operating cabinet; 1103. Display panel; 1104. Controller; 1105. Gas filling equipment;

[0031] 2. Inspection Station; 21. Support Structure; 2101. Front Support Frame; 2102. Rear Support Frame; 22. Feeding Structure; 2201. L-shaped Connecting Plate; 2202. Push Cylinder; 2203. Slide Rail; 2204. Slider; 23. Lower Mold Structure; 2301. Bottom Frame; 2302. Bottom Irregular Buffer Pad; 2303. Supporting Bottom Block; 2304. Mounting Hole; 2305. Movable Block; 24. Upper Mold Structure; 2401. Top Frame; 2402. Top Irregular Buffer Pad; 2403. Air Inlet; 25. Sealing Structure; 2501. Guide Component; 2502. Gas-Liquid Booster Cylinder; 2503. Downward Pressing Cylinder; 2504. Support Frame; 26. Sealing Structure; 2601. Telescopic Cylinder; 2602. Soft Sealing Head. Detailed Implementation

[0032] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation are all within the protection scope of this utility model without creative effort.

[0033] Example

[0034] Please refer to Figure 1 As shown, this utility model provides a battery casing cover airtightness testing device. The testing device includes an operating station 1 and a testing station 2. The operating station 1 is independently placed on one side of the testing station 2, and the operating station 1 and the testing station 2 are connected by an air pipe and a wire. The operating station 1 can control the testing station 2. The operating station 1 includes an air storage tank 1101 and an operating cabinet 1102. The air storage tank 1101 is placed on the ground on the side of the operating cabinet 1102, or the air storage tank 1101 can be fixed to the operating cabinet 1102. On the side of 2, the front of the operating cabinet 1102 is equipped with a display panel 1103 and a controller 1104. The display panel 1103 and the controller 1104 can control the inflation or start of the cylinder of the testing station 2. The operating station 1 is equipped with an inflation device 1105, which includes an air pump, a mass flow meter and a pressure gauge. The pressure gauge has a pipe that is directly connected to the inflation port 2403 of the testing station 2. The pressure gauge can detect the air pressure after a pressure holding time, thereby determining whether the air tightness is qualified.

[0035] like Figure 1 As shown in this application, the relative position of the display panel 1103 in the operating station 1 is taken as the front. For example, the display panel 1103 is embedded in the mounting plate in front of the operating cabinet 1102.

[0036] like Figure 1As shown, the testing station 2 includes a support structure 21, which includes a front support frame 2101 and a rear support frame 2102. The front support frame 2101 is located in front of the rear support frame 2102, and the front support frame 2101 and the rear support frame 2102 are welded together.

[0037] like Figures 1-2 As shown, the testing station 2 also includes a feeding structure 22, which includes a slide rail 2203 and a push cylinder 2202. There are two slide rails 2203, which are arranged on the top surfaces of the front support frame 2101 and the rear support frame 2102. The slide rails 2203 are arranged in the front-rear direction. The push cylinder 2202 is fixed on the top of the rear support frame 2102. The extension end of the push cylinder 2202 faces the front support frame 2101. The extension end of the push cylinder 2202 is fixed with an L-shaped connecting plate 2201. The top surface of the slide rail 2203 is fitted with a slider 2204.

[0038] like Figures 1-3 As shown, the inspection station 2 also includes a lower mold structure 23, which includes a bottom frame 2301, a slider 2204 fixedly connected to the bottom surface of the bottom frame 2301, and an L-shaped connecting plate 2201 fixedly connected to the bottom frame 2301, thereby pushing the bottom frame 2301 to move by extending and retracting the cylinder 2202; a number of support blocks 2303 are provided on the bottom frame 2301, and a bottom irregular buffer pad 2302 is laid on the top surface of the support block 2303. An installation hole 2304 is opened on the top surface of the support block 2303, and a movable block 2305 is fixed on the bottom surface of the bottom irregular buffer pad 2302. The movable block 2305 extends into the installation hole 2304.

[0039] like Figures 1-6 As shown, the testing station 2 also includes a sealing structure 25, which includes a support frame 2504. To ensure that the lower mold structure 23 can move smoothly above the rear support frame 2102 without hindering the installation of the support frame 2504, the width of the rear support frame 2102 is greater than the width of the front support frame 2101. Four guide components 2501 and four pneumatic-hydraulic booster cylinders 2502 are symmetrically arranged on the top surface of the support frame 2504. A pressing cylinder 2503 is fixed at the center of the top surface of the support frame 2504. The pressing cylinder 2503 is connected to the upper mold structure 24. The upper mold structure 24 is fixedly connected to both the guide component 2501 and the pressing cylinder 2503. The guide component 2501 has a guiding function, enabling the upper mold structure 24 to move stably up and down. The pressing cylinder 2503 serves as a driving unit, and the gas-liquid booster cylinder 2502 serves as a power output unit. The pressing cylinder 2503 can perform a preliminary driving action first. After the upper mold structure 24 contacts the battery case cover, the gas-liquid booster cylinder 2502 then intervenes to provide greater output force so that the upper mold structure 24 presses the battery case cover tightly, thereby achieving a sealing effect.

[0040] like Figures 1-6 As shown, the upper mold structure 24 includes a top frame 2401, which is fixedly connected to the guide assembly 2501, the gas-liquid booster cylinder 2502 and the lower pressure cylinder 2503. The bottom surface of the top frame 2401 is provided with a top irregular buffer pad 2402, which has the same shape as the inner wall of the battery case cover. After the battery case cover is pressed onto the bottom irregular buffer pad 2302, the edge of the top irregular buffer pad 2402 can press and seal the edge of the battery case cover. The top irregular buffer pad 2402 is a certain distance from the inner wall of the battery case cover. The top surface of the inflation port 2403 is provided with a number of inflation ports 2403, which are connected to the inflation device 1105.

[0041] The bottom irregular-shaped buffer pad 2302 and the top irregular-shaped buffer pad 2402 are made of polyurethane material, which can prevent the bottom irregular-shaped buffer pad 2302 and the top irregular-shaped buffer pad 2402 from pressing against the battery case cover and causing damage.

[0042] like Figure 3 and Figure 4 As shown, the testing station 2 also includes a sealing structure 26, which includes a telescopic cylinder 2601. The telescopic cylinder 2601 is fixed on the side of the bottom frame 2301. The telescopic end of the telescopic cylinder 2601 is provided with a soft sealing head 2602. The soft sealing head 2602 is made of flexible silicone sealing ring material, which fits the irregular surface and holes of the battery case cover, avoids deformation leakage caused by rigid contact, and achieves the requirement of rapid sealing of the battery case cover.

[0043] Specific working principle:

[0044] During use, place the battery casing cover on the bottom frame 2301. After checking that the placement is stable, start the automated detection operation through operation station 1. The automated operation process is as follows:

[0045] S1. Push cylinder 2202 to drive bottom frame 2301 to slide on slide rail 2203, so that bottom frame 2301 moves to directly below upper mold structure 24;

[0046] S2. The pressing cylinder 2503 starts to work. After the pressing cylinder 2503 pushes the upper mold structure 24 down a certain distance, the upper mold structure 24 presses onto the battery case cover.

[0047] S3. Start the gas-liquid booster cylinder 2502, so that the gas-liquid booster cylinder 2502 pushes the upper mold structure 24 to continue to move downward a certain distance, providing stable pressure to seal the edge of the battery case cover.

[0048] S4, the inflation device 1105 is started. The air pump of the inflation device 1105 introduces gas into the upper mold structure 24 and the battery casing cover through the mass flow meter, air pressure gauge and inflation port in sequence.

[0049] S5. After the air pump introduces a fixed amount of gas, it is turned off, and the pressure change is continuously monitored by the pressure gauge. If there is a problem with the airtightness, the pressure will decrease; if there is no problem with the airtightness, the pressure will remain unchanged.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A battery casing cover airtightness testing device, comprising an operating station (1) and a testing station (2), characterized in that: The testing station (2) includes The support structure (21), including a front support frame (2101) and a rear support frame (2102), is used to support and place other structural components of the inspection station (2); The structure (22) is set above the support structure (21) to send the top cover of the battery case to be tested into the testing position; The lower mold structure (23) is set above the feeding structure (22) and is used for placing the battery case cover and sealing the bottom. A sealing structure (25) is located above the rear side of the support structure (21) and is used to provide driving force for the detection and sealing of the battery case cover; The upper mold structure (24) is located below the sealing structure (25) and is used to seal the detection of the battery case cover.

2. The battery casing cover airtightness detection device according to claim 1, characterized in that: The operating station (1) includes a gas storage tank (1101) and an operating cabinet (1102). The gas storage tank (1101) is placed on one side of the operating cabinet (1102), and a display panel (1103) and a controller (1104) are provided on the internal frame of the operating cabinet (1102).

3. The battery casing cover airtightness detection device according to claim 1, characterized in that: The front support frame (2101) is fixed in front of the rear support frame (2102).

4. The battery casing cover airtightness detection device according to claim 1, characterized in that: The feeding structure (22) includes a push cylinder (2202) and a slide rail (2203). The push cylinder (2202) and the slide rail (2203) are fixed on the top surfaces of the front support frame (2101) and the rear support frame (2102). There are two slide rails (2203), which are symmetrically located on both sides of the slide rail (2203). The extension end of the push cylinder (2202) points to the front end. An L-shaped connecting plate (2201) is fixed in front of the push cylinder (2202). A slider (2204) is provided on the top surface of the slide rail (2203).

5. The battery casing cover airtightness detection device according to claim 4, characterized in that: The lower mold structure (23) includes a bottom frame (2301), which is fixed to the top of the slider (2204). The L-shaped connecting plate (2201) is fixedly connected to the bottom surface of the bottom frame (2301). The top surface of the bottom frame (2301) is provided with several supporting blocks (2303) for supporting the bottom irregular buffer pad (2302) provided on the top surface of the bottom frame (2301). The top surface of the supporting blocks (2303) is provided with mounting holes (2304). The bottom surface of the bottom irregular buffer pad (2302) is provided with movable blocks (2305) placed inside the mounting holes (2304).

6. The battery casing cover airtightness detection device according to claim 5, characterized in that: The testing station (2) also includes a sealing structure (26), which includes a telescopic cylinder (2601). The telescopic cylinder (2601) is located on the side of the bottom frame (2301), and a soft sealing head (2602) is fixed to the telescopic end of the telescopic cylinder (2601). The soft sealing head (2602) is connected to the bottom irregular buffer pad (2302).

7. The battery casing cover airtightness detection device according to claim 1, characterized in that: The sealing structure (25) includes a support frame (2504), the top surface of the rear support frame (2102) is fixed with the support frame (2504), the top surface of the support frame (2504) is symmetrically provided with four guide components (2501) and four gas-liquid booster cylinders (2502), and the middle part of the top surface of the support frame (2504) is fixed with a downward pressure cylinder (2503).

8. The battery casing cover airtightness detection device according to claim 7, characterized in that: The upper mold structure (24) includes a top frame (2401), the guide component (2501), the gas-liquid booster cylinder (2502), and the lower pressure cylinder (2503) are all fixedly connected to the top frame (2401), and a top irregular buffer pad (2402) is provided at the bottom of the top frame (2401), and multiple air inlets (2403) are installed on the top irregular buffer pad (2402).

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