Cavity for detecting air tightness of accommodated workpiece and equipment thereof
By designing adjustable lower and upper chamber structures, combined with flat panel components and rod slides, the problems of existing lithium battery sealing test chambers being unable to adapt to batteries of different sizes and having low helium utilization efficiency have been solved, achieving flexible testing and cost reduction.
Patent Information
- Application Number
- CN202423318334.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing lithium battery sealing test chambers cannot accommodate batteries of different sizes, and helium utilization efficiency is low, while resin molding is prone to deformation, resulting in high costs.
The design incorporates adjustable lower and upper cavity structures, combined with flat plate components, rods, and slide rails, to enable workpiece position adjustment in six directions, thereby improving helium contact efficiency.
It enables flexible testing of batteries of different sizes, improves helium utilization, and reduces testing costs.
Smart Images
Figure CN223827223U_ABST
Abstract
Description
Technical Field
[0001] This disclosure generally relates to the field of workpiece sealing performance testing technology. More specifically, this disclosure relates to a lithium battery sealing performance testing chamber. Background Technology
[0002] With the development of lithium battery technology, lithium batteries are increasingly widely used in various energy storage fields. However, if the battery's sealing is substandard, it is prone to catching fire or even exploding, seriously affecting normal use and even endangering the user's life. Therefore, sealing testing after manufacturing is an indispensable step for lithium batteries.
[0003] Current technology typically uses helium mass spectrometry (HMS) leak detection to test the sealing performance of lithium batteries. This method is a highly sensitive detection technique that uses helium as a leak indicator gas to determine the sealing performance of the workpiece by detecting the amount of helium molecules leaking. During helium testing, the workpiece is placed inside a specially designed chamber, and then a helium mass spectrometer is used to detect whether there is a helium leak. This chamber is generally referred to as the helium detection chamber.
[0004] In existing technologies, to ensure high sealing performance, the lower chamber of a helium detection chamber often uses a resin molding process. A recess with the same shape and size as the battery is carved out of the resin to hold the battery to be tested. However, in practical use, this resin mold is prone to deformation over time, requiring replacement with a new one, resulting in high time and economic costs.
[0005] Furthermore, in existing technologies, the battery placement position within the detection chamber is fixed in size, and clips are used to secure the battery to the bottom surface of the detection chamber. Because the battery placement position is fixed in size, this method is difficult to adjust for batteries of different sizes. Additionally, the use of clips to secure the battery to the bottom surface of the detection chamber prevents full utilization of the helium gas within the chamber, resulting in low helium utilization efficiency.
[0006] In view of this, there is an urgent need to provide a technical solution for a cavity and its equipment for testing the airtightness of a contained workpiece, so that the cavity can be adjusted for workpieces of different sizes to meet different testing requirements. Furthermore, the workpiece to be tested can be positioned in six directions, allowing the workpiece to fully contact helium gas and improving helium utilization. Utility Model Content
[0007] In order to solve at least the several technical problems mentioned above, this disclosure proposes a technical solution for a cavity and its equipment for airtightness testing of a contained workpiece in several aspects.
[0008] In a first aspect, this disclosure provides a cavity for airtightness testing of a contained workpiece, comprising a lower cavity and an upper cavity separable from each other in a first direction. The lower cavity includes a lower cavity top and a lower cavity bottom. A plate assembly, a first rod, a second rod, and a third rod are also disposed within the lower cavity. The plate assembly includes a first plate transverse to the first direction and a second plate transverse to the first plate. The first plate has a first plate through-hole with an axis parallel to the first direction, and the first plate is used to support the workpiece. The second plate has a second plate opening extending through its thickness direction, the second plate opening being elongated and extending along a second direction transverse to the first direction. The first rod passes through the first plate through-hole, and its two ends are movably connected to the top and bottom of the lower cavity, respectively. The second rod passes through the second plate opening and is movably connected to the plate assembly. A first toothed transmission portion is formed on the surface of the first end of the second rod, and a limiting portion is provided at the second end of the second rod. The surface of the third rod has a second toothed transmission portion opposite to the first toothed transmission portion, and the first end of the third rod is movably connected to the bottom of the lower cavity.
[0009] In a second aspect, this disclosure provides a battery helium testing device, wherein the testing device includes a cavity according to any embodiment of this disclosure, the upper cavity includes a cover plate and an incident needle, the cover plate is provided with a sealing material along the edge of the first direction for sealing connection with the lower cavity, the incident needle penetrates the cover plate in the opposite direction of the first direction and is sealed to the cover plate; the incident needle is adapted to inject a detection substance to perform airtightness testing on the battery contained in the cavity.
[0010] The chamber provided above is used to test the airtightness of the contained workpiece. By setting an adjustable limiting part, it is possible to test workpieces of different sizes. By combining the slide rail and rod in the chamber, the position of the workpiece in six directions can be set, so that the workpiece can fully contact helium and improve the utilization rate of helium. Attached Figure Description
[0011] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:
[0012] Figure 1 A schematic diagram of the overall structure of this disclosed embodiment is shown;
[0013] Figure 2 A schematic diagram of the internal structure of an embodiment disclosed herein is shown;
[0014] Figure 3 A schematic diagram of the internal structure of an embodiment disclosed herein is shown;
[0015] Figure 4 A schematic diagram of the internal structure of an embodiment disclosed herein is shown;
[0016] Figure 5 A schematic diagram of the flat panel assembly structure according to an embodiment of this disclosure is shown;
[0017] Figure 6 A schematic diagram of the internal structure of an embodiment of this disclosure is shown.
[0018] Explanation of reference numerals in the attached figures:
[0019] 1-Inferior cavity;
[0020] 10-Plate assembly, 11-First plate, 111-First plate first assembly, 112-First plate second assembly, 1121-First part of first plate second assembly, 1122-Second part of first plate second assembly, 113-Through hole of first plate, 12-Second plate, 121-Opening of second plate, 122-Notch of second plate, 13-Connecting part of plate assembly, 131-First connecting part, 132-Second connecting part;
[0021] 20 - First rod, 21 - First rod protrusion, 22 - First rod slider;
[0022] 30 - Fourth stroke, 31 - First sub-stroke of the fourth stroke, 32 - Second sub-stroke of the fourth stroke;
[0023] 40-Second rod, 41-Second rod first sub-rod, 411-First limiting part, 4111-First limiting plate, 4112-Second limiting plate, 412-First sleeve part, 42-Second rod second sub-rod, 421-Second limiting part, 4211-Third limiting plate, 4212-Fourth limiting plate, 422-Second sleeve part, 45-Second protrusion, 451-First plane, 4511-First rack;
[0024] 50 - Third rod, 51 - First sub-rod of the third rod, 52 - Second sub-rod of the third rod, 53 - Second gear, 54 - Slider of the third rod;
[0025] 61-Top of the lower cavity; 611-First opening; 62-Bottom of the lower cavity;
[0026] 70-Slide rail;
[0027] 8-Upper cavity, 81-Cover plate, 82-Incident needle;
[0028] 91 - First direction, 92 - Second direction, 93 - Third direction. Detailed Implementation
[0029] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0030] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0031] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.
[0032] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."
[0033] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.
[0034] Figure 1 A schematic diagram of the overall structure of this disclosed embodiment is shown. Figure 2 , Figure 3 and Figure 4 A schematic diagram of the internal structure of an embodiment of this disclosure is shown.
[0035] like Figures 1-4As shown, a cavity for airtightness testing of a contained workpiece is disclosed. The cavity includes a lower cavity 1 and an upper cavity 8 that are separable from each other in a first direction 91. The lower cavity 1 includes a lower cavity top 61 and a lower cavity bottom 62. A plate assembly 10, a first rod 20, a second rod 40, and a third rod 50 are also disposed within the lower cavity 1. The plate assembly 10 includes a first plate 11 transverse to the first direction 91 and a second plate 12 transverse to the first plate 11. The first plate 11 has a first plate through-hole 113 with its axis parallel to the first direction 91, and the first plate 11 is used to support the workpiece. The second plate 12 has a through-hole extending through its thickness. The second plate has an opening 121, which is elongated and extends along a second direction 92 that is transverse to the first direction 91. The first rod 20 passes through the through hole 113 of the first plate, and its two ends are movably connected to the top 61 and the bottom 62 of the lower cavity, respectively. The second rod 40 passes through the second plate opening 121 and is movably connected to the flat plate assembly 10. The surface of the first end of the second rod 40 has a first toothed transmission part, and the second end of the second rod 40 is provided with a limiting part. The surface of the third rod 50 has a second toothed transmission part opposite to the first toothed transmission part, and the first end of the third rod 50 is movably connected to the bottom 62 of the lower cavity.
[0036] Specifically, the cavity can accommodate a workpiece for airtightness testing. The overall shape of the cavity is not limited, but a cubic shape is preferred to facilitate the placement of other components inside and the easy loading and unloading of the workpiece. The cavity may include a lower cavity 1 and an upper cavity 8 that are separate from each other. The lower cavity 1 and the upper cavity 8 have the same size and shape in their cross-sections perpendicular to the first direction 91, so that the interior of the cavity is isolated from the exterior after assembly.
[0037] The lower cavity 1 includes a lower cavity top 61 and a lower cavity bottom 62, wherein the lower cavity top 61 is located on a first direction 91 of the lower cavity bottom 62, and the size and shape of the cross-section of the lower cavity top 61 and the lower cavity bottom 62 perpendicular to the first direction 91 are the same. The shape of the cross-section of the lower cavity 1 perpendicular to the first direction 91 is not limited.
[0038] The lower cavity 1 is further equipped with a flat plate assembly 10, a first rod 20, a second rod 40, and a third rod 50, used to place the workpiece at a predetermined position within the cavity. The flat plate assembly 10 supports the workpiece, meaning the workpiece can be placed on it. The first rod 20, the second rod 40, and the third rod 50 cooperate to allow the workpiece's position within the cavity to be simultaneously changed along a first direction 91, a second direction 92, and a third direction 93, thus enabling the workpiece to be placed at the predetermined position within the cavity. The first direction 91, the second direction 92, and the third direction 93 intersect each other.
[0039] Figure 5 A schematic diagram of the flat panel assembly structure according to an embodiment of this disclosure is shown. Figure 5 As shown, the flat plate assembly 10 includes a first plate 11 and a second plate 12. The first plate 11 is perpendicular to a first direction 91 and is used to place a workpiece, keeping the workpiece horizontal and stationary and preventing it from slipping off the upper surface of the first plate 11. The shape of the cross-section of the first plate 11 perpendicular to the first direction 91 is not limited, but preferably, the cross-section is rectangular. The second plate 12 is perpendicular to the first plate 11. The shape of the cross-section of the second plate 12 perpendicular to a second direction 92 is not limited, but preferably, the cross-section is generally rectangular.
[0040] The first plate 11 includes a first plate first component 111 and a first plate second component 112. The first plate first component 111 is located on a first direction 91 of the first plate second component 112, and the two are connected to each other. The workpiece is placed on the upper surface of the first plate first component 111. The first plate second component 112 includes a first part 1121 and a second part 1122 of the first plate second component, and the second part 1122 is located on a second direction 92 of the first part 1121. The first part 1121 of the first plate second component is generally V-shaped, and the second part 1122 of the first plate second component is generally cubic. The first part 1121 of the first plate second component is connected to the first plate first component 111, preferably detachably fixed, and the second part 1122 of the first plate second component is integrally connected to the first part 1121 of the first plate second component. When the second part 1122 of the first plate second assembly moves, it drives the first part 1121 of the first plate second assembly to move, thereby driving the first plate first assembly 111 to move. Simultaneously, the second part 1122 of the first plate second assembly can pass precisely through the second plate notch 122 of the second plate 12. The second part 1122 of the first plate second assembly has a first plate through hole 113, the axis of which is parallel to the first direction 91, allowing the first rod 20 to pass through the first plate through hole 113.
[0041] The second plate 12 forms a second plate opening 121 that penetrates the second plate 12 along the second direction 92, through which the second rod 40 passes; a second plate notch 122 is formed in the opposite direction of the first direction 91 of the second plate 12, and the second plate notch 122 penetrates the second plate 12 along the second direction 92.
[0042] Furthermore, the first plate 11 and the second plate 12 are connected by a flat panel assembly connecting part 13. The flat panel assembly connecting part 13 may include a first connecting part 131 and a second connecting part 132, which are disposed along a third direction 93 for connecting the first plate 11 and the second plate 12.
[0043] The first rod 20 passes through the first plate through hole 113 of the second component 112 of the first flat plate along the first direction 91, and the first rod 20 is movably connected to the first plate through hole 113. The upper end of the first rod 20 along the first direction 91 and the lower end along the opposite direction of the first direction 91 are movably connected to the top 61 and the bottom 62 of the lower cavity, respectively, so that the first rod 20 can move along the third direction 93.
[0044] The second rod 40 passes through the second plate opening 121 of the second plate 12, is movably connected to the flat plate assembly 10, and is movable within the second plate opening 121 along the second direction 92 and the third direction 93. At the first end of the second rod 40 along the second direction 92, a first toothed transmission portion is formed on the surface of this end, which cooperates with other toothed transmission portions to transmit power; at the second end of the second rod 40 along the opposite direction of the second direction 92, a limiting portion is provided for limiting the position of the workpiece.
[0045] The side surface of the third rod 50 is provided with a second toothed transmission part that is opposite to the first toothed transmission part. The first end of the third rod 50 in the opposite direction of the first direction 91 is movably connected to the bottom 62 of the lower cavity, so that the third rod 50 can move in the third direction 93.
[0046] In some embodiments, the second rod 40 includes a second rod first sub-rod 41 and a second rod second sub-rod 42 parallel to the second rod first sub-rod 41; a first toothed transmission portion is formed on the surface of the first end of the second rod first sub-rod 41 and the second rod second sub-rod 42; a first limiting portion 411 is provided at the second end of the second rod first sub-rod 41, the first limiting portion 411 includes a first limiting plate 4111 perpendicular to a third direction 93 and a second limiting plate 4112 perpendicular to a second direction 92, the second limiting plate 4112 being connected to the side of the first limiting plate 4111 near the second plate 12; a second limiting portion 421 is formed at the second end of the second rod second sub-rod 42, the second limiting portion 421 including a third limiting plate 4211 parallel to the first limiting plate 4111 and a fourth limiting plate 4212 parallel to the second limiting plate 4112, wherein the fourth limiting plate 4212 and the side of the third limiting plate 4211 away from the second plate 12 are connected.
[0047] Specifically, the second rod 40 includes a second rod first sub-rod 41 and a second rod second sub-rod 42, and the axes of the second rod first sub-rod 41 and the second rod second sub-rod 42 are parallel to each other.
[0048] The surfaces of the first ends of the first sub-rod 41 and the second sub-rod 42 along the second direction 92 are respectively formed with first toothed transmission parts, which can cooperate with other toothed transmission parts to transmit power. The first toothed transmission part of the first sub-rod 41 faces the third direction 93, and the first toothed transmission part of the second sub-rod 42 faces the opposite direction of the third direction 93.
[0049] Limiting portions are formed at the second ends of the first sub-rod 41 and the second sub-rod 42 in the opposite direction to the second direction 92. The second end of the first sub-rod 41 has a first limiting portion 411, and the second end of the second sub-rod 42 has a second limiting portion 421. The first limiting portion 411 and the second limiting portion 421 are located on the first plate 11 in the first direction 91 and in the opposite direction to the second direction 92 of the second plate 12. The first limiting portion 411 and the second limiting portion 421 are at the same height in the first direction 91.
[0050] The first limiting part 411 includes a first limiting plate 4111 and a second limiting plate 4112, which are connected to each other. The second limiting part 421 includes a third limiting plate 4211 and a fourth limiting plate 4212, which are connected to each other. The first limiting plate 4111 and the third limiting plate 4211 are perpendicular to a third direction 93, and the second limiting plate 4112 and the fourth limiting plate 4212 are perpendicular to a second direction 92. The first limiting plate 4111 and the third limiting plate 4211 are parallel to each other, and the second limiting plate 4112 and the fourth limiting plate 4212 are also parallel to each other. Of the two limiting parts, the first limiting part 411 is closer to the second plate 12, and the second limiting part 421 is further away from the second plate 12.
[0051] In some embodiments, the third rod 50 includes a third rod first sub-rod 51 and a third rod second sub-rod 52 parallel to the third rod first sub-rod 51; the surface of the third rod first sub-rod 51 is formed with a second toothed transmission portion opposite to the first toothed transmission portion of the second rod first sub-rod 41, and the surface of the third rod second sub-rod 52 is formed with a second toothed transmission portion opposite to the first toothed transmission portion of the second rod second sub-rod 42.
[0052] Specifically, the third rod 50 includes the first sub-rod 51 and the second sub-rod 52, and the axes of the first sub-rod 51 and the second sub-rod 52 are parallel to each other.
[0053] The surfaces of the first ends of the first sub-rod 41 and the second sub-rod 42 along the second direction 92 are respectively formed with first toothed transmission parts, which can cooperate with other toothed transmission parts to transmit power. The first toothed transmission part of the first sub-rod 41 faces the third direction 93, and the first toothed transmission part of the second sub-rod 42 faces the opposite direction of the third direction 93.
[0054] The side of the first sub-rod 51 of the third rod has a second toothed transmission part that is opposite to the first toothed transmission part of the first sub-rod 41 of the second rod. The second toothed transmission part of the first sub-rod 51 of the third rod cooperates with the first toothed transmission part of the first sub-rod 41 of the second rod to transmit power. By rotating the first sub-rod 51 of the third rod, the first sub-rod 41 of the second rod can move along the second direction 92. The side of the second sub-rod 52 of the third rod has a second toothed transmission part that is opposite to the first toothed transmission part of the second sub-rod 42 of the second rod. The second toothed transmission part of the second sub-rod 52 of the third rod cooperates with the first toothed transmission part of the second sub-rod 42 of the second rod to transmit power. By rotating the second sub-rod 52 of the third rod, the second sub-rod 42 of the second rod can move along the second direction 92. Therefore, by rotating the third rod 50, the first limiting part 411 and the second limiting part 421 can move relative to each other along the second direction 92.
[0055] In some embodiments, the second rod 40 is sleeved by the sleeve portion, the outer wall of the sleeve portion is provided with a protrusion, and the side wall of the second plate opening 121 is formed with a groove. The protrusion of the outer wall of the sleeve portion corresponds to the groove of the side wall of the second plate opening 121, so that the sleeve portion can move in the second plate opening 121 along a third direction 93, and restricts the sleeve portion from moving in the second plate opening 121 along a second direction 92.
[0056] The outer side of the second rod 40 contacts the inner side of the sleeve portion, thereby connecting the second rod 40 to the sleeve portion. Specifically, the outer side of the first sub-rod 41 of the second rod contacts the inner side of the first sleeve portion 412, thereby connecting the first sub-rod 41 of the second rod to the first sleeve portion 412. The outer side of the second sub-rod 42 of the second rod contacts the inner side of the second sleeve portion 422, thereby connecting the second sub-rod 42 of the second rod to the second sleeve portion 422.
[0057] The sleeve portion is cylindrical in shape, and its cross-section perpendicular to the second direction 92 is annular. The inner diameter of the cross-section of the sleeve portion perpendicular to the second direction 92 is exactly larger than the diameter of the cross-section of the second rod 40 perpendicular to the second direction 92. The second rod 40 is cylindrical in shape and can pass through the sleeve portion, moving relative to the sleeve portion along the second direction 92.
[0058] Furthermore, the outer wall of the sleeve portion is provided with a protrusion, the plane formed by the protrusion being perpendicular to the second direction 92. Simultaneously, a groove is formed on the side wall of the second plate opening 121, the plane formed by the groove also being perpendicular to the second direction 92. The shape and size of the protrusion on the outer wall of the sleeve portion and the groove on the side wall of the second plate opening 121 correspond to each other. The protrusion on the outer wall of the sleeve portion is engaged in the groove on the side wall of the second plate opening 121, allowing the sleeve portion to move along the third direction 93 within the second plate opening 121 and preventing the sleeve portion from moving along the second direction 92 within the second plate opening 121.
[0059] Figure 6A schematic diagram of the internal structure of an embodiment of this disclosure is shown.
[0060] like Figure 6 As shown, in some embodiments, a second protrusion 45 is formed at the first end of the second rod 40 along the second direction 92. The cross-section of the second protrusion 45 includes an arc shape and line segments connecting the two ends of the arc shape. A first plane 451 is formed on the second protrusion 45 along the second direction 92, wherein the first plane 451 faces the third rod 50, and a first rack 4511 is formed on the first plane 451. The cross-section of the third rod 50 is set to be circular, and a second gear 53 is formed on the surface of the third rod 50. The first rack 4511 is meshed with the second gear 53. When the third rod 50 rotates, the second gear 53 drives the first rack 4511, causing the second rod 40 to move in the second direction 92.
[0061] Specifically, the first end of the second rod 40 has a second protrusion 45 formed along the second direction 92. The second protrusion 45 is generally columnar, and its cross-section perpendicular to the second direction 92 includes an arc shape and line segments connecting the two ends of the arc shape, preferably a semi-circle. The second protrusion 45 has a first plane 451 formed along the second direction 92, wherein the first plane 451 faces and contacts the third rod 50. A first rack 4511, i.e., the first toothed transmission part of the second rod 40, is formed on the first plane 451. The cross-section of the third rod 50 perpendicular to the first direction 91 is rectangular, and a second gear 53, i.e., the second toothed transmission part of the third rod 50, is formed on the side surface of the third rod 50 facing the third direction 93. The first rack 4511 and the second gear 53 are meshed and connected. When the third rod 50 rotates along the axis, the second gear 53 drives the first rack 4511, enabling the second rod 40 to move in the second direction 92.
[0062] In some embodiments, the first rod 20 is rotatably connected to the first plate through hole 113; the top 61 of the lower cavity is provided with a first opening 611, the first end of the first rod 20 passes through the first opening 611 and is rotatably connected to the first opening 611; the first end of the first rod 20 is formed with a first rod protrusion 21 along the first direction 91 for controlling the rotation of the first rod 20.
[0063] Specifically, the first rod 20 is rotatably connected to the through hole 113 of the first plate. Preferably, the outer wall of the first rod 20 and the inner wall of the through hole 113 of the first plate are provided with corresponding threads, and the first rod 20 is threadedly connected to the through hole 113 of the first plate. By rotating the first rod 20, the second component 112 of the first plate can be moved along the axial direction of the through hole 113 of the first plate, that is, along the first direction 91, thereby driving the first plate 11 to move along the first direction 91.
[0064] The lower cavity top 61 is provided with a first opening 611. The first end of the first rod 20 along the first direction 91 passes through the first opening 611 and is rotatably connected to the first opening 611. The first end of the first rod 20 along the first direction 91 forms a first rod protrusion 21 along the first direction 91, which is used to control the rotation of the first rod 20. By rotating the first rod protrusion 21, the first rod 20 is driven to rotate, thereby causing the first opening 611, which is rotatably connected to the first rod protrusion 21, to move along the first direction 91. Since the second rod 40 passes through the second plate opening 121, it can drive the first sub-rod 41 of the second rod and the second sub-rod 42 of the second rod to move along the first direction 91, thereby causing the first limiting part 411 and the second limiting part 421 to move relative to each other along the first direction 91.
[0065] In the first direction 91, the position of the first rod protrusion 21 is higher than the first opening 611, which makes it easier for the user to rotate the first rod 20.
[0066] In some embodiments, a third rod slider 54 is provided at the first end of the third rod 50; a slide rail 70 parallel to the third direction 93 is provided at the bottom 62 of the lower cavity; the third rod slider 54 is connected to the slide rail 70 and can move along the slide rail 70 in the third direction 93.
[0067] Specifically, a third rod slider 54 is provided at the first end of the third rod 50 in the opposite direction to the first direction 91; a slide rail 70 parallel to the third direction 93 is provided at the bottom 62 of the lower cavity, the third rod slider 54 is connected to the slide rail 70, the third rod slider 54 can move along the slide rail 70 in the third direction 93, and keep the third rod 50 parallel to the first direction 91.
[0068] In some embodiments, a first rod slider 22 is provided at the first end of the first rod 20; the first rod slider 22 is connected to the slide rail 70 and can move along the slide rail 70 in a third direction 93.
[0069] Specifically, a first rod slider 22 is provided at the first end of the first rod 20 in the opposite direction to the first direction 91; a slide rail 70 parallel to the third direction 93 is provided at the bottom 62 of the lower cavity, the first rod slider 22 is connected to the slide rail 70, the first rod slider 22 can move along the slide rail 70 in the third direction 93, and keep the first rod 20 parallel to the first direction 91.
[0070] In some embodiments, the cavity further includes a fourth rod 30, the axis of which is parallel to the axis of the third rod 50, and the first end of the fourth rod 30 and the first end of the third rod 50 are connected to the same third rod slider 54; the second protrusion 45 of the second rod 40 is clamped by the fourth rod 30 and the third rod 50 in a third direction 93, so that the second rod 40 moves along the third direction 93 with the fourth rod 30 and the third rod 50.
[0071] Specifically, the cavity also includes a fourth rod 30, which is generally cubic in shape. The axes of the fourth rod 30 and the third rod 50 are parallel to each other, and the first end of the fourth rod 30 in the opposite direction of the first direction 91 and the first end of the third rod 50 in the opposite direction of the first direction 91 are connected to the same third rod slider 54, so that the fourth rod 30 and the third rod 50 can move synchronously along the third direction 93 on the slide rail 70. There is a certain gap between the fourth rod 30 and the third rod 50, which allows the second protrusion 45 of the second rod 40 to pass through the gap, and the fourth rod 30 and the third rod 50 clamp the second protrusion 45 of the second rod 40 in the third direction 93. At this time, since the second protrusion 45 of the second rod 40 is clamped by the fourth rod 30 and the third rod 50, when the fourth rod 30 and the third rod 50 move along the third direction 93, they can drive the second rod 40 to move synchronously along the third direction 93.
[0072] The fourth lever 30 may include a first sub-lever 31 and a second sub-lever 32. The first sub-lever 31 and the first sub-lever 51 are connected by a third lever slider 54, enabling them to move synchronously along a third direction 93. The second sub-lever 32 and the second sub-lever 52 are also connected by a third lever slider 54, enabling them to move synchronously along a third direction 93.
[0073] There is a certain gap between the first sub-rod 31 of the fourth rod and the first sub-rod 51 of the third rod, such that the second protrusion 45 of the first sub-rod 41 of the second rod just passes through this gap, and the first sub-rod 31 of the fourth rod and the first sub-rod 51 of the third rod clamp the second protrusion 45 of the first sub-rod 41 of the second rod in the third direction 93. At this time, since the second protrusion 45 of the first sub-rod 41 of the second rod is clamped by the first sub-rod 31 of the fourth rod and the first sub-rod 51 of the third rod, when the first sub-rod 31 of the fourth rod and the first sub-rod 51 of the third rod move along the third direction 93, they can drive the first sub-rod 41 of the second rod to move synchronously along the third direction 93. There is a certain gap between the second sub-rod 32 of the fourth rod and the second sub-rod 52 of the third rod, such that the second protrusion 45 of the second sub-rod 42 of the second rod just passes through this gap, and the second sub-rod 32 of the fourth rod and the second sub-rod 52 of the third rod clamp the second protrusion 45 of the second sub-rod 42 of the second rod in the third direction 93. At this time, since the second protrusion 45 of the second sub-rod 42 of the second rod is clamped by the second sub-rod 32 of the fourth rod and the second sub-rod 52 of the third rod, when the second sub-rod 32 of the fourth rod and the second sub-rod 52 of the third rod move along the third direction 93, they can drive the second sub-rod 42 of the second rod to move synchronously along the third direction 93. Therefore, the first sub-rod 41 of the second rod and the second sub-rod 42 of the second rod can move respectively along the third direction 93, so that the first limiting part 411 and the second limiting part 421 move relative to each other along the third direction 93.
[0074] like Figure 1 As shown, a testing device includes a cavity according to any of the embodiments disclosed herein. The upper cavity 8 includes a cover plate 81 and an incident needle 82. The cover plate 81 is provided with a sealing material along the edge of a first direction 91 for sealing connection with the lower cavity 1. The incident needle 82 penetrates the cover plate 81 in the opposite direction of the first direction 91 and is sealed to the cover plate 81. The incident needle 82 is adapted to inject a testing substance to perform airtightness testing on the battery contained in the cavity.
[0075] Specifically, the testing device includes any of the cavities disclosed in this application, which are used to perform airtightness testing on the contained workpiece. The cavity includes a lower cavity 1 and an upper cavity 8 that are separable from each other in a first direction 91. The upper cavity 8 includes a cover plate 81 and an injection needle 82. The cross-section of the cover plate 81 perpendicular to the first direction 91 has the same shape and size as the cross-section of the top 61 of the lower cavity perpendicular to the first direction 91, and cooperates with the outer shell of the lower cavity 1 to prevent the material inside the cavity from escaping between the cover plate 81 and the outer shell of the lower cavity 1. A sealing material is provided on the edge of the cover plate 81 that contacts the outer shell of the lower cavity 1 along the first direction 91 to ensure a sealed connection between the cover plate 81 and the outer shell of the lower cavity 1. The injection needle 82 penetrates the cover plate 81 in the opposite direction of the first direction 91. When a test substance is injected into the cavity through the injection needle 82, the test substance can enter the cavity from the injection needle 82 and reach the lower cavity 1, thereby bringing the test substance into contact with the workpiece. In addition, the incident needle 82 is sealed to the cover plate 81 to prevent the detection material injected into the cavity from escaping from the gap between the incident needle 82 and the cover plate 81.
[0076] In the embodiments of this application, the cavity is equipped with an adjustable limiting part to detect workpieces of different sizes; the combination of slide rails and rods in the cavity enables the position setting of the workpiece in six directions, so that the workpiece can fully contact helium gas and improve the utilization rate of helium gas.
[0077] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.
Claims
1. A cavity for performing airtightness testing on a contained workpiece, the cavity comprising a lower cavity (1) and an upper cavity (8) separable from each other in a first direction (91), the lower cavity (1) comprising a lower cavity top (61) and a lower cavity bottom (62), characterized in that, The lower cavity (1) is also provided with a flat plate assembly (10), a first rod (20), a second rod (40), and a third rod (50); wherein, The flat panel assembly (10) includes a first plate (11) which is transverse to the first direction (91) and a second plate (12) which is transverse to the first plate (11); The first plate (11) has a first plate through hole (113) with an axis parallel to the first direction (91), and the first plate (11) is used to support the workpiece; The second plate (12) forms a second plate opening (121) that penetrates the thickness direction of the second plate (12). The second plate opening (121) is elongated and extends along a second direction (92) that is transverse to the first direction (91). The first rod (20) passes through the through hole (113) of the first plate, and the two ends of the first rod (20) are movably connected to the top (61) of the lower cavity and the bottom (62) of the lower cavity, respectively. The second rod (40) passes through the opening (121) of the second plate and is movably connected to the plate assembly (10). A first toothed transmission part is formed on the surface of the first end of the second rod (40), and a limiting part is provided at the second end of the second rod (40). The surface of the third rod (50) is formed with a second toothed transmission part opposite to the first toothed transmission part, and the first end of the third rod (50) is movably connected to the bottom (62) of the lower cavity.
2. The cavity according to claim 1, characterized in that, The second rod (40) includes a second rod first sub-rod (41) and a second rod second sub-rod (42) parallel to the second rod first sub-rod (41); The first end surfaces of the first sub-rod (41) and the second sub-rod (42) of the second rod are formed with first toothed transmission parts; The second end of the first sub-rod (41) of the second rod is provided with a first limiting part (411). The first limiting part (411) includes a first limiting plate (4111) perpendicular to the third direction (93) and a second limiting plate (4112) perpendicular to the second direction (92). The second limiting plate (4112) is connected to the side of the first limiting plate (4111) near the second plate (12). The first direction (91), the second direction (92), and the third direction (93) intersect each other. The second end of the second rod and the second sub-rod (42) is provided with a second limiting part (421). The second limiting part (421) includes a third limiting plate (4211) parallel to the first limiting plate (4111) and a fourth limiting plate (4212) parallel to the second limiting plate (4112). The fourth limiting plate (4212) and the side of the third limiting plate (4211) away from the second plate (12) are connected.
3. The cavity according to claim 2, characterized in that, The third rod (50) includes a first sub-rod (51) of the third rod and a second sub-rod (52) of the third rod that is parallel to the first sub-rod (51); The surface of the first sub-branch (51) of the third rod has a second toothed transmission portion that is opposite to the first toothed transmission portion of the first sub-branch (41) of the second rod, and the surface of the second sub-branch (52) of the third rod has a second toothed transmission portion that is opposite to the first toothed transmission portion of the second sub-branch (42) of the second rod.
4. The cavity according to claim 2, characterized in that, The second rod (40) is sleeved by the sleeve part, the outer wall of the sleeve part is provided with a protrusion, and the side wall of the second plate opening (121) forms a groove. The protrusion of the outer wall of the sleeve part corresponds to the groove of the side wall of the second plate opening (121), so that the sleeve part can move in the second plate opening (121) along the third direction (93) and restrict the sleeve part from moving in the second plate opening (121) along the second direction (92).
5. The cavity according to claim 2, characterized in that, The first end of the second rod (40) has a second protrusion (45) formed along the second direction (92). The cross section of the second protrusion (45) includes an arc shape and a line segment connecting the two ends of the arc shape. The second protrusion (45) has a first plane (451) formed along the second direction (92). The first plane (451) faces the third rod (50). A first rack (4511) is formed on the first plane (451). The cross-section of the third rod (50) is circular, and a second gear (53) is formed on the surface of the third rod (50); The first rack (4511) is meshed with the second gear (53). When the third rod (50) rotates, the second gear (53) drives the first rack (4511), causing the second rod (40) to move in the second direction (92).
6. The cavity according to claim 1, characterized in that, The first rod (20) is rotatably connected to the through hole (113) of the first plate; The top (61) of the lower cavity is provided with a first opening (611), and the first end of the first rod (20) passes through the first opening (611) and is rotatably connected to the first opening (611). The first end of the first rod (20) has a first rod protrusion (21) formed along the first direction (91) for controlling the rotation of the first rod (20).
7. The cavity according to claim 2, characterized in that, The first end of the third rod (50) is provided with a third rod slider (54); The bottom (62) of the lower cavity is provided with a slide rail (70) parallel to the third direction (93); The third rod slider (54) is connected to the slide rail (70) and can move along the slide rail (70) in the third direction (93).
8. The cavity according to claim 7, characterized in that, The first end of the first rod (20) is provided with a first rod slider (22); The first rod slider (22) is connected to the slide rail (70) and the first rod slider (22) can move along the slide rail (70) in the third direction (93).
9. The cavity according to claim 5, characterized in that, The first end of the third rod (50) is provided with a third rod slider (54); The bottom (62) of the lower cavity is provided with a slide rail (70) parallel to the third direction (93); The third rod slider (54) is connected to the slide rail (70) and can move along the slide rail (70) in the third direction (93); The cavity further includes a fourth rod (30), the axis of which is parallel to the axis of the third rod (50), and the first end of the fourth rod (30) and the first end of the third rod (50) are connected to the same third rod slider (54); the second protrusion (45) of the second rod (40) is clamped by the fourth rod (30) and the third rod (50) in the third direction (93), so that the second rod (40) moves along the third direction (93) with the fourth rod (30) and the third rod (50).
10. A device for testing the airtightness of a contained workpiece, characterized in that, The device includes a cavity as described in any one of claims 1-9, the upper cavity (8) including a cover plate (81) and an incident needle (82), the cover plate (81) being provided with a sealing material along the edge of the first direction (91) for sealing connection with the lower cavity (1), the incident needle (82) penetrating the cover plate (81) in the opposite direction of the first direction (91) and sealingly connected with the cover plate (81); the incident needle (82) is adapted to inject a detection substance to perform airtightness testing on the battery contained in the cavity.