A pressure testing device

Abstract

The utility model belongs to the production test technical field of battery, disclose a kind of pressure testing device, the sealing pressure detection of battery can be realized, and it is suitable for the air tightness test of battery sealing welding. The pressure testing device includes body, cover, first adjusting part, second adjusting part and third adjusting part. First adjusting part is slidably connected in first direction in body, battery is located in first adjusting part, cover is covered in first adjusting part along first direction;Second adjusting part is slidably connected in second direction in body, and for abutting the side of battery along second direction, the other side of body abutting battery in second direction;Third adjusting part is slidably connected in third direction in body, and for abutting the side of battery along third direction, the other side of body abutting battery in third direction;Wherein, first direction, second direction and third direction are orthogonal pairwise. In the utility model, the adaptability to the size of battery can be improved, and production efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of battery production and testing technology, and in particular to a pressure testing device. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems and consumer electronics, the application scope of high-efficiency batteries such as lithium-ion batteries is constantly expanding.

[0003] As a core energy component, the safety of batteries directly affects the reliability of end products and user safety. The airtightness of the battery casing is a crucial indicator for preventing electrolyte leakage and external moisture intrusion. Poor sealing can lead to battery performance degradation, or even serious accidents such as short circuits, fires, and explosions. Therefore, during battery production, after assembly and cover welding, rigorous airtightness testing must be performed to ensure complete sealing.

[0004] To meet diverse market demands, battery model iterations are accelerating significantly. Different battery models vary considerably in size, and even within the same series, dimensional tolerances can differ slightly. This continuous evolution in battery structure and dimensions makes existing testing equipment ill-suited for the diverse range of models. This necessitates the constant purchase of new equipment, increasing costs. Furthermore, in continuous production, the lack of flexibility in testing and frequent equipment changes further disrupt production rhythm and efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a pressure testing device for detecting the airtightness of battery seals, while also being adaptable to batteries of various specifications and sizes, thus improving adaptability and avoiding frequent equipment replacements due to battery model changes, thereby ensuring production rhythm and efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A pressure testing device for detecting the sealing pressure of a battery, comprising:

[0008] ontology;

[0009] A first adjusting member is slidably connected to the body along a first direction, and the battery is disposed on the first adjusting member;

[0010] The second adjustment member is slidably connected to the body along the second direction and is used to abut against one sidewall of the battery along the second direction;

[0011] The third adjusting member is slidably connected to the body along a third direction and is used to abut against the other sidewall of the battery along the third direction; wherein,

[0012] The first direction, the second direction, and the third direction are all orthogonal to each other.

[0013] Beneficial effects:

[0014] In the above scheme, the first adjusting member is located inside the main body and can slide along a first direction. The battery is placed on the first adjusting member, which provides stable support for the battery. The second adjusting member can slide along a second direction, with the battery abutting against the inner wall of the main body relative to the other wall of the second adjusting member. Therefore, the slidability of the second adjusting member can accommodate the installation of batteries of different sizes in the second direction. The third adjusting member can slide along a third direction, with the battery abutting against the inner wall of the main body relative to the other wall of the third adjusting member. Therefore, the slidability of the third adjusting member can accommodate the installation of batteries of different sizes in the third direction. By having the first, second, and third directions orthogonal to each other, a stable installation and fixation of the battery can be achieved in three-dimensional space. Since the first, second, and third adjusting members are adjustable in the three orthogonal directions (first, second, and third), they can effectively accommodate the installation and fixation of batteries of different specifications, models, and sizes. This improves the adaptability to battery sealing welding pressure testing, avoids frequent equipment changes due to battery model changes on the same production line, and ensures production rhythm and efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pressure testing device provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the pressure testing device for the hidden cover and the battery fixing provided in this embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the battery structure provided in an embodiment of the present invention;

[0018] Figure 4 This is a top view of the pressure testing device for the hidden cover provided in this embodiment of the utility model;

[0019] Figure 5 This is a front view of the pressure testing device for the hidden cover provided in this embodiment of the utility model;

[0020] Figure 6 This is a schematic diagram of the pressure testing device for the hidden cover provided in this embodiment of the utility model.

[0021] In the picture:

[0022] Z, first direction; X, second direction; Y, third direction; 100, battery; 110, terminal post; 120, filling hole; 130, explosion-proof plate;

[0023] 1. Body; 11. Guide groove; 111. Scale; 12. Sliding hole; 13. Gasket; 14. First limiting groove; 15. Second limiting groove; 16. Vent hole; 17. Pad block;

[0024] 2. First adjusting component; 21. Guide block; 22. Adjusting hole; 23. First hollow hole; 24. Second hollow hole;

[0025] 3. Second adjusting component; 31. First receiving groove;

[0026] 4. Third adjusting component; 41. Second receiving groove;

[0027] 5. Adjusting components;

[0028] 6. Base plate; 61. First guide rail; 62. Second guide rail;

[0029] 7. First driving component; 71. First rotating part; 72. First handwheel;

[0030] 8. Second driving component; 81. Second rotating part; 82. Second handwheel;

[0031] 9. Cover; 91. Through hole. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between 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.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] It should be noted that, in order for those skilled in the art to clearly understand this solution, the relevant content that may be involved will be briefly introduced below.

[0037] A battery is a device that converts stored chemical energy into electrical energy. In the field of new energy vehicles, batteries power the vehicle's drive system, control system, and electronic system. Battery airtightness is a key indicator for preventing electrolyte leakage and external moisture intrusion. Poor sealing can lead to battery performance degradation, or even serious accidents such as short circuits, fires, or explosions. Therefore, during battery production, after assembly and cover welding, the battery must undergo rigorous airtightness testing to ensure complete sealing.

[0038] Battery leaks are typically caused by welding defects, structural cracks, or micropores in the material. For example, if there are micron-sized leaks in the sealing welds of the battery's aluminum casing, electrolyte leakage may occur during charging and discharging due to internal pressure changes, accelerating the risk of internal short circuits. Furthermore, tiny cracks and micropores in the battery casing weaken its protective strength and, during continuous use, may fail to achieve the intended pressure-bearing capacity, leading to battery explosion and leakage.

[0039] Currently, battery production lines primarily employ airtightness testing to ensure the battery's leak-proof performance, indirectly assessing airtightness through pressure drop methods during testing. For example, after filling the battery with a test gas, pressure changes are monitored to calculate the leakage rate; the accuracy of this testing requires precise matching with the battery's internal volume, test pressure, and time. Specifically, a test gas is injected into the battery through a gas filling mechanism, and pressure changes or gas loss are monitored using a pressure sensor or flow meter. This method is low-cost and simple to operate, but it significantly depends on the stability of the battery's internal volume.

[0040] In reality, battery leaks often occur at the sealing weld joint. Due to the influence of welding process control, the uncertainty in the quality of the sealing weld results in poor consistency in the airtightness of the sealing weld joint. When testing the airtightness of the sealing weld joint using the pressure drop method, it is necessary to limit the deformation of each outer surface of the battery due to the increase in air pressure, thereby ensuring that the pressure applied to the sealing weld joint gradually increases. Therefore, continuous pre-pressure needs to be applied to each outer surface of the battery to prevent deformation of the battery surface, in order to accurately assess the airtightness of the sealing weld joint.

[0041] Due to limitations in existing testing equipment and tooling, the dimensional differences between battery models during production line changes severely impact the adaptability of these devices. Existing equipment and tooling are only designed for testing single-model batteries, exhibiting poor adaptability and compatibility. Forcing the use of existing equipment and tooling to test the airtightness of multiple battery models is unrealistic and fails to achieve the desired testing process, resulting in inaccurate results. Furthermore, the airtightness testing of the battery's sealing welds directly affects battery quality, which in turn impacts the quality of the battery pack and the entire vehicle. Therefore, airtightness testing of the sealing welds is crucial during battery manufacturing.

[0042] Please see the appendix Figure 1 - Appendix Figure 3 This embodiment provides a sealing pressure testing device (hereinafter referred to as the "testing device"), which can detect the sealing pressure of the battery 100, and is particularly suitable for testing the airtightness of the sealing weld of the battery 100. The testing device includes a body 1, a first adjusting member 2, a second adjusting member 3, and a third adjusting member 4. The first adjusting member 2 is slidably connected to the body 1 along a first direction Z, and the battery 100 is disposed on the first adjusting member 2; the second adjusting member 3 is slidably connected to the body 1 along a second direction X, and is used to abut against the battery 100 along the second direction X; the third adjusting member 4 is slidably connected to the body 1 along a third direction Y, and is used to abut against the battery 100 along the third direction Y; wherein, the first direction Z, the second direction X, and the third direction Y are all orthogonal to each other.

[0043] The main body 1 is a rectangular frame structure formed by connecting four plate components in sequence. The main body 1 is made of metal to achieve stable strength support and resistance to deformation. The interior of the main body 1 forms an installation space for accommodating the battery 100, and this installation space is also rectangular. The first adjusting member 2 is located inside the main body 1 and can slide along a first direction Z, which is the height direction of the main body 1 and, depending on the placement of the battery 100, also the thickness extension direction of the battery 100. The battery 100 is placed on the first adjusting member 2, which provides stable support for the battery 100. The second adjusting member 3 and the third adjusting member 4 are both cubic block structures, and they make contact with the surface of the battery 100 through a plane pressing mechanism. The second adjusting member 3 can slide along the second direction X, which is the width direction of the body 1. Depending on the placement of the battery 100, the second direction X is also the length extension direction of the battery 100. The other wall of the battery 100 relative to the second adjusting member 3 abuts against the inner wall of the body 1. Therefore, the slidability of the second adjusting member 3 can accommodate the installation of batteries 100 of different lengths. The third adjusting member 4 can slide along the third direction Y, which is the length direction of the body 1. Depending on the placement of the battery 100, the third direction Y is also the height extension direction of the battery 100. The other wall of the battery 100 relative to the third adjusting member 4 abuts against the inner wall of the body 1. Therefore, the slidability of the third adjusting member 4 can accommodate the installation of batteries 100 of different heights. In this embodiment, because the first direction Z, the second direction X, and the third direction Y are all orthogonal to each other, and based on the structure of the cuboid battery 100, a stable limiting installation of the battery 100 can be formed in three-dimensional space.

[0044] The pressure testing device also includes a cover 9, which covers the side of the battery 100 relative to the first adjustment member 2.

[0045] Specifically, the cover 9 is also a plate that completely covers the main body 1. The cover 9 primarily restricts the wall surface of the battery 100 relative to the first adjusting member 2 on one side, preventing the battery 100 from expanding during the ventilation test and thus ensuring accurate assessment of the sealing weld's airtightness. The cover 9 is hinged to the main body 1, allowing the user to manually rotate the cover 9 to cover the main body 1 after installing the battery 100, improving operational convenience. The cover 9 has an array of through holes 91. The through holes 91 are circular for ease of machining and reduce the weight of the cover 9, contributing to the overall weight reduction goal of the testing device.

[0046] In this embodiment, the first adjustment member 2, the second adjustment member 3, and the third adjustment member 4 are adjustable in three orthogonal directions: the first direction Z, the second direction X, and the third direction Y. This effectively adapts to the installation and fixing of batteries 100 of different specifications, models, and sizes, thereby improving the adaptability to the sealing welding pressure test of batteries 100. This avoids frequent equipment changes on the same production line due to changes in battery 100 models, ensuring production rhythm and efficiency, avoiding the need to purchase large testing equipment to adapt to different battery 100 models, and reducing costs.

[0047] Please see the appendix Figure 4 Optionally, one of the inner wall of the body 1 and the first adjusting member 2 is provided with a guide block 21, and the other is provided with a guide groove 11. The guide block 21 is slidably disposed in the guide groove 11 along the first direction Z.

[0048] Specifically, a guide groove 11 is formed on the inner wall of the main body 1 along the first direction Z. Multiple guide grooves 11 can be provided, either on two opposite inner walls of the main body 1 or sequentially on all four inner walls. For adaptability, a guide block 21 is protruded from the outer periphery of the first adjusting member 2 corresponding to the position of the guide groove 11. The guide block 21 is a cubic block, and it forms an integral structure with the first adjusting member 2. The guide block 21 can be adjusted in position by sliding along the guide groove 11 in the first direction Z.

[0049] In this embodiment, by setting guide blocks 21 and guide grooves 11 that slide and cooperate with each other, the movement of the first adjustment member 2 is guided, which improves the accuracy of the movement of the first adjustment member 2 relative to the body 1 in the first direction Z, and also ensures the smoothness of the position adjustment of the first adjustment member 2 in the first direction Z.

[0050] It should be noted that the cross-sectional shapes of the guide block 21 and the guide groove 11 include, but are not limited to, rectangles, trapezoids, triangles, or partial circles. The number and location of the guide block 21 and the guide groove 11 can also be determined according to the difficulty of machining.

[0051] Furthermore, a scale 111 is provided in the guide groove 11, and the position of the guide block 21 relative to the first direction Z is measured and indicated by the scale 111.

[0052] Specifically, a scale 111 is provided in the guide groove 11. The scale 111 can be a separate flat plate with dimensional measurement function, or the scale lines for dimensional measurement can be directly formed on the inner wall of the guide groove 11, thereby reducing the installation process of parts and reducing the assembly difficulty. However, the scale 111 is a separate flat plate with dimensional measurement function, which can be directly replaced after wear, improving maintainability.

[0053] Please see the appendix Figure 4 and attached Figure 5 Optionally, the body 1 has a sliding hole 12 extending along the first direction Z, the first adjusting member 2 is provided with an adjusting hole 22, and the sealing pressure testing device further includes an adjusting member 5, which passes through the sliding hole 12 and is connected to the adjusting hole 22, so as to fix the first adjusting member 2 after the first position in the first direction Z is adjusted.

[0054] Specifically, the sliding hole 12 is an elongated hole structure extending along the first direction Z. A ring-shaped, plate-like connecting platform is formed by protruding inwards along the circumferential inner wall of the sliding hole 12. The adjusting member 5 can be a threaded fastener. A circular adjusting hole 22 is further provided on the first adjusting member 2 at a position corresponding to the sliding hole 12. The adjusting hole 22 is a threaded hole to cooperate with the threaded fastener for installation. After the first adjusting member 2 is adjusted in the first direction Z, the adjusting member 5 passes through the sliding hole 12 and is threadedly connected to the adjusting hole 22. The head of the threaded fastener presses against the connecting platform, thus stably fixing the first adjusting member 2 relative to the body 1. To improve stability, multiple connecting and fixing structures can be provided. That is, several adjusting holes 22 can be spaced apart in the circumferential direction of the first adjusting member 2. Correspondingly, the same number of sliding holes 12 are provided on the body 1. Using the same number of adjusting members 5 achieves multi-position fixing of the first adjusting member 2, improving the stability of the first adjusting member 2.

[0055] Please see the appendix Figure 6 Optionally, the testing device also includes a base plate 6, which is connected to the bottom wall of the main body 1, and the second adjusting member 3 and the third adjusting member 4 are slidably connected to the base plate 6.

[0056] Specifically, the four plate components of the main body 1 are connected to the base plate 6 via the bottom wall. The base plate 6 and the main body 1 are fixedly connected by threaded fasteners. Specifically, the threaded fasteners pass through the base plate 6 and are screwed into the bottom wall of the main body 1. The base plate 6 serves to support the second adjusting component 3 and the third adjusting component 4, and also provides a sliding reference for the second adjusting component 3 and the third adjusting component 4, ensuring that the second adjusting component 3 and the third adjusting component 4 slide stably along the second direction X and the third direction Y, respectively.

[0057] In some embodiments, the base plate 6 is provided with a first guide rail 61 extending along a second direction X, the second adjusting member 3 is slidably connected to the first guide rail 61, the base plate 6 is provided with a second guide rail 62 extending along a third direction Y, and the third adjusting member 4 is slidably connected to the second guide rail 62.

[0058] Specifically, the first guide rail 61 and the second guide rail 62 are screwed and fixed to the base plate 6. Multiple first guide rails 61 on the base plate 6 are spaced apart and arranged side-by-side along a third direction Y, and the bottom wall of the second adjusting member 3 is slidably connected to the first guide rail 61 via a slider. Additionally, multiple second guide rails 62 on the base plate 6 are spaced apart and arranged side-by-side along a second direction X, and the bottom wall of the third adjusting member 4 is slidably connected to the second guide rail 62 via a slider. Of course, in other embodiments, the slider can be adaptively removed, and the second adjusting member 3 and the third adjusting member 4 can directly use groove structures on their bottom walls to slide and engage with the first guide rail 61 and the second guide rail 62 respectively, thereby reducing the number of parts.

[0059] In this embodiment, the first guide rail 61 and the second guide rail 62 are used to guide the sliding of the second adjusting member 3 and the third adjusting member 4, while ensuring the smoothness of the position movement.

[0060] Optionally, the first adjusting member 2 is provided with a first hollow hole 23 extending along the second direction X, and a part of the structure of the second adjusting member 3 passes through the first hollow hole 23 and is slidably connected to the base plate 6; the first adjusting member 2 is provided with a second hollow hole 24 extending along the third direction Y, and a part of the structure of the third adjusting member 4 passes through the second hollow hole 24 and is slidably connected to the base plate 6.

[0061] Specifically, the first adjusting member 2 has a plate-like structure. The first adjusting member 2 needs to reciprocate along the first direction Z to adjust its relative position. The second adjusting member 3 and the third adjusting member 4 need to abut against the outer wall of the battery 100, and the other part needs to slide against the base plate 6. By forming a first hollow hole 23 and a second hollow hole 24 on the first adjusting member 2, the second adjusting member 3 and the third adjusting member 4 can be stably slidably connected to the base plate 6 after passing through the first adjusting member 2. The size and shape of the first hollow hole 23 and the second hollow hole 24 should be able to avoid movement interference between the second adjusting member 3 and the third adjusting member 4. Therefore, the first hollow hole 23 and the second hollow hole 24 also extend through the movement paths of the second adjusting member 3 and the third adjusting member 4, respectively.

[0062] Optionally, the testing device further includes a first driving member 7 and a second driving member 8 connected to the main body 1. The first driving member 7 is connected to the second adjusting member 3, and the second driving member 8 is connected to the third adjusting member 4.

[0063] Specifically, the first driving member 7 can be a screw, which is screwed to the body 1. The part of the screw outside the body 1 has a first handwheel 72 for easy rotation by the user. One end of the first driving member 7 passes through the body 1 and enters the interior of the body 1, and has a disc-shaped first rotating part 71 at one end. The first rotating part 71 is located in the first receiving groove 31 of the second adjusting member 3. The first rotating part 71 causes the second adjusting member 3 to reciprocate by pressing the inner wall of the first receiving groove 31. For example, when the first handwheel 72 rotates clockwise, the first driving member 7 drives the first rotating part 71 to move towards the battery 100, and the second adjusting member 3 approaches and abuts against the battery 100; when the first handwheel 72 of the first driving member 7 rotates counterclockwise, the first driving member 7 drives the first rotating part 71 to move away from the battery 100, and the second adjusting member 3 moves away from the battery 100 and releases contact with the battery 100, thereby releasing the battery 100. Of course, the second driving member 8 can also be a screw. The second driving member 8 is screwed to the body 1, and the part of the screw outside the body 1 has a second handwheel 82 for easy rotation by the user. One end of the second driving member 8 passes through the body 1 and enters the interior of the body 1, and a disc-shaped second rotating part 81 is provided at one end. The second rotating part 81 is located in the second receiving groove 41 of the third adjusting member 4. The second rotating part 81 causes the third adjusting member 4 to reciprocate by pressing the inner wall of the second receiving groove 41. For example, when the second handwheel 82 of the second driving member 8 rotates clockwise, the second driving member 8 drives the second rotating part 81 to move towards the battery 100, and the third adjusting member 4 moves towards and abuts against the battery 100; when the second handwheel 82 rotates counterclockwise, the second driving member 8 drives the second rotating part 81 to move away from the battery 100, and the third adjusting member 4 moves away from the battery 100 and releases contact with the battery 100, thereby releasing the battery 100.

[0064] Optionally, the main body 1 is provided with a gasket 13, which presses against the explosion-proof sheet 130 of the battery 100.

[0065] The gasket 13 can be made of a highly elastic material such as silicone to apply pre-pressure to the explosion-proof sheet 130. This prevents the explosion-proof sheet 130 from bursting open due to internal gas during the airtightness test of the sealing weld, thus affecting the entire test process and the airtightness test results, ensuring that the test is only for the airtightness of the sealing weld. A first limiting groove 14 is formed on the inner wall of the body 1 to accommodate the gasket 13. The gasket 13 can be bonded or interference-fitted into the first limiting groove 14.

[0066] Furthermore, the coverage area of ​​gasket 13 is acm. 2 The area of ​​the explosion-proof sheet 130 is bcm. 2 , where 1≤a / b≤4.

[0067] In this embodiment, the gasket 13 should be able to completely cover the explosion-proof sheet 130 of various types of batteries 100. Typically, the coverage area of ​​the gasket 13 is acm. 2 It should be larger than the largest area of ​​the explosion-proof disc 130 in the model to maintain adaptability, and to a certain extent, also to accommodate the positions of different explosion-proof discs 130, thereby improving compatibility. However, the coverage area of ​​the gasket 13 is acm. 2 It also cannot be too large, as this would waste materials and weaken the strength of the main body 1. In this embodiment, the area of ​​the explosion-proof sheet 130 is bcm². 2 The value ranges from 5cm² to 15cm², and the coverage area of ​​gasket 13 is acm. 2 The value ranges from 5cm² to 20cm². And 1≤a / b≤4, thus ensuring both adaptability and compatibility, as well as the overall strength of the main body 1.

[0068] It should be noted that ACM 2 The value can be any of the following: 5cm², 8cm², 9cm², 10cm², 11.5cm², 12cm², 14cm², 15cm², 18cm², 19cm², 20cm², or any value between 5cm² and 20cm²; bcm 2 The value can be any of the following: 5cm², 8cm², 9.2cm², 10cm², 11.5cm², 12.2cm², 14cm², 15cm², or any value between 5cm² and 15cm².

[0069] Optionally, the main body 1 is provided with a second limiting groove 15, and the terminal post 110 of the battery 100 is placed in the second limiting groove 15.

[0070] A second limiting groove 15 is formed on the inner wall of the main body 1. The second limiting groove 15 is used to accommodate the terminal post 110 of the battery 100 to prevent the terminal post 110 of the battery 100 from being damaged. Of course, an elastic pad 17 can also be provided in the second limiting groove 15. The pad 17 is used to abut against the terminal post 110. The pad 17 adopts an elastic structure to protect the terminal post 110.

[0071] Optionally, the main body 1 is provided with a vent 16, which is connected to the liquid injection hole 120 of the battery 100. The detection gas enters the battery 100 through the vent 16 and the liquid injection hole 120 in sequence.

[0072] Specifically, the external inflation mechanism's vent tube can be sealed to the vent 16. At the same time, after the battery 100 is installed, the liquid injection hole 120 should be aligned with and sealed to the vent 16, so that the detection gas of the inflation mechanism can enter the battery 100 through the vent 16 and the liquid injection hole 120 in sequence, and also prevent air leakage.

[0073] Optionally, the first adjusting member 2 is adjusted in the first direction Z with a dimension range of A mm, 30 mm ≤ A ≤ 80 mm; the second adjusting member 3 is adjusted in the second direction X with a dimension range of B mm, 160 mm ≤ B ≤ 350 mm; and the third adjusting member 4 is adjusted in the third direction Y with a dimension range of C mm, 100 mm ≤ C ≤ 300 mm.

[0074] It should be noted that the value of Amm can be any of the following: 30mm, 40mm, 45mm, 50mm, 56mm, 56.2mm, 60mm, 70mm, 75mm, 80mm; or any value between 30mm and 80mm. The value of Bmm can be any of the following: 160mm, 170mm, 180mm, 190mm, 250mm, 275mm, 285mm, 300mm, 320mm, 350mm; or any value between 160mm and 350mm. The value of Cmm can be any of the following: 100mm, 150mm, 180mm, 192mm, 250mm, 268mm, 287mm, 290mm, 298mm, 300mm; or any value between 100mm and 300mm.

[0075] This testing device can adapt to various models and specifications of batteries 100. The size adjustment range of the first adjusting part 2 is A mm, 30 mm ≤ A ≤ 80 mm; the size adjustment range of the second adjusting part 3 is B mm, 160 mm ≤ B ≤ 350 mm; and the size adjustment range of the third adjusting part 4 is C mm, 100 mm ≤ C ≤ 300 mm. It can be compatible with various battery 100 models with a thickness of 30 mm to 80 mm, a height of 100 mm to 300 mm, and a length of 160 mm to 350 mm.

[0076] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A pressure testing device for detecting the sealing pressure of a battery (100), characterized in that, include: Ontology(1); Cover (9); The first adjusting member (2) is slidably connected to the body (1) along the first direction, the battery (100) is disposed on the first adjusting member (2), and the cover (9) is disposed on the side of the battery (100) away from the first adjusting member (2) along the first direction; The second adjustment member (3) is slidably connected to the body (1) along the second direction and is used to abut against one side of the battery (100) along the second direction. The body (1) abuts against the battery (100) on the other side of the second direction relative to the inner wall of the second adjustment member (3). The third adjusting member (4) is slidably connected to the body (1) along a third direction and is used to abut against one side of the battery (100) along the third direction, wherein the body (1) abuts against the battery (100) on the other side of the third direction relative to the inner wall of the third adjusting member (4); wherein, The first direction, the second direction, and the third direction are all orthogonal to each other.

2. The pressure testing device according to claim 1, characterized in that, The first adjustment member (2) is located inside the body (1). One of the inner wall of the body (1) and the first adjustment member (2) is provided with a guide block (21), and the other is provided with a guide groove (11). The guide block (21) slides in the guide groove (11) along the first direction.

3. The pressure testing device according to claim 2, characterized in that, The guide groove (11) is provided with a scale (111), and the position of the guide block (21) relative to the first direction is measured and indicated by the scale (111).

4. The pressure testing device according to claim 1, characterized in that, The body (1) has a sliding hole (12) extending along the first direction, and the first adjusting member (2) is provided with an adjusting hole (22). The pressure testing device also includes an adjusting member (5), which passes through the sliding hole (12) and is connected to the adjusting hole (22) to be fixed after the first adjusting member (2) is adjusted in the first direction.

5. The pressure testing device according to claim 1, characterized in that, The pressure testing device also includes a base plate (6), which is connected to the bottom wall of the body (1), and the second adjusting member (3) and the third adjusting member (4) are slidably connected to the base plate (6).

6. The pressure testing device according to claim 5, characterized in that, The base plate (6) is provided with a first guide rail (61) extending along the second direction, and the second adjustment member (3) is slidably connected to the first guide rail (61). The base plate (6) is provided with a second guide rail (62) extending along the third direction, and the third adjustment member (4) is slidably connected to the second guide rail (62).

7. The pressure testing device according to claim 5, characterized in that, The first adjustment member (2) is provided with a first hollow hole (23) extending along the second direction, and a part of the structure of the second adjustment member (3) passes through the first hollow hole (23) and is slidably connected to the base plate (6); the first adjustment member (2) is provided with a second hollow hole (24) extending along the third direction, and a part of the structure of the third adjustment member (4) passes through the second hollow hole (24) and is slidably connected to the base plate (6).

8. The pressure testing device according to claim 1, characterized in that, The pressure testing device further includes a first drive member (7) and a second drive member (8) connected to the main body (1), the first drive member (7) being connected to the second adjustment member (3), and the second drive member (8) being connected to the third adjustment member (4).

9. The pressure testing device according to claim 1, characterized in that, The cover (9) is rotatably connected to the body (1), and the cover (9) is provided with a plurality of through holes (91) arranged in an array.

10. The pressure testing device according to claim 1, characterized in that, The main body (1) is provided with a gasket (13), which presses against the explosion-proof sheet (130) of the battery (100).

11. The pressure testing device according to claim 10, characterized in that, The coverage area of ​​the gasket (13) is acm 2 The area of ​​the explosion-proof sheet (130) is bcm. 2 , where 1≤a / b≤4.

12. The pressure testing device according to claim 1, characterized in that, The main body (1) is provided with a second limiting groove (15), and the terminal post (110) of the battery (100) is placed in the second limiting groove (15).

13. The pressure testing device according to claim 1, characterized in that, The main body (1) is provided with a vent (16), which is connected to the liquid injection hole (120) of the battery (100). The detection gas enters the battery (100) through the vent (16) and the liquid injection hole (120) in sequence.

14. The pressure testing apparatus according to any one of claims 1-13, characterized in that, The first adjusting member (2) adjusts the size range of A mm along the first direction, 30 mm ≤ A ≤ 80 mm; the second adjusting member (3) adjusts the size range of B mm along the second direction, 160 mm ≤ B ≤ 350 mm; the third adjusting member (4) adjusts the size range of C mm along the third direction, 100 mm ≤ C ≤ 300 mm.

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