Airtight test tooling and airtight test device

Abstract

The present invention discloses an airtightness test tooling and an airtightness test device, relating to the technical field of battery production. The airtightness test tooling includes a frame, a bearing platform, a first pressing component, and a second pressing component; the bearing platform is arranged on the frame and is used for bearing a part to be tested, and the part to be tested includes a body part and an irregular part; the first pressing component is used for pressing or releasing the body part and can make the body part and the bearing platform enclose to form a first sealed cavity; the second pressing component includes a pressing part and an inverted buckle part, the pressing part and the inverted buckle part can lift above the bearing platform, and the pressing part and the inverted buckle part clamp the opposite two surfaces of the irregular part, and the irregular part, the bearing platform and the pressing part enclose to form a second sealed cavity. This solution can detect the airtightness of a battery box body with an irregular surface.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production, and in particular to an airtight testing tool and an airtight testing device. Background Art

[0002] With the rapid development and application of new energy technologies, new energy batteries as core energy storage devices, the lithium battery industry has flourished, and the requirements and technologies for core power cells are constantly improving. The most important issue is safety. The battery box that carries and wraps the power cells is the first barrier to cell safety. If the sealing performance of the battery box is poor, it will cause serious damage to electrical safety and battery performance.

[0003] In the related art, the traditional airtightness test tooling can only perform airtightness tests on battery boxes with regular surfaces, but cannot perform airtightness tests on battery boxes with irregular surfaces. Summary of the invention

[0004] In view of the above problems, the present application provides an airtight testing tool and an airtight testing device, which are intended to detect the sealing of a battery box with an irregular surface.

[0005] The present application provides an airtight testing tool, comprising a frame, a carrying platform, a first clamping assembly and a second clamping assembly; the carrying platform is arranged on the frame, and is used to carry a part to be tested, and the part to be tested comprises a main body part and an irregular part; the first clamping assembly is arranged on the frame, and is used to clamp or release the main body part, and can make the main body part and the carrying platform enclosed to form a first sealed cavity; the second clamping assembly is arranged on the frame, and comprises a clamping part and an undercut part, and the clamping part and the undercut part can be raised and lowered above the carrying platform, and the clamping part and the undercut part are clamped on two opposite surfaces of the irregular part, and the irregular part, the carrying platform and the clamping part enclosed to form a second sealed cavity.

[0006] In the technical scheme of the embodiment of the present application, when the airtight test fixture proposed in the technical scheme of the present invention performs airtight detection on the part to be tested, the part to be tested including the main body and the irregular part is first placed on the bearing platform; the first clamping assembly clamps the main body to form a first sealed cavity between the main body and the bearing platform; the clamping part and the undercut part of the second clamping assembly can clamp the two opposite surfaces of the irregular part to form a second sealed cavity between the irregular part and the bearing platform and the clamping part; the first sealed cavity and the second sealed cavity are inflated, and the air pressure changes in the first sealed cavity and the second sealed cavity are detected, and the sealing of the part to be tested can be judged according to the air pressure changes. Among them, since the irregular part of the part to be tested uses the clamping part and the undercut part to clamp the two opposite surfaces of the irregular part, the irregular part will not be squeezed and deformed during clamping, and therefore, this scheme can perform airtight detection on battery boxes with irregular surfaces.

[0007] In some embodiments, the top of the irregular part has a flange; the pressing part and the undercut part are clamped on the upper and lower surfaces of the flange. In such a design, since the top of the irregular part of the part to be tested has a flange, when the part to be tested is subjected to airtightness testing, the pressing part can be pressed against the upper surface of the flange, and the undercut part can be undercut on the lower surface of the flange, so that the pressing part and the undercut part are clamped on the upper and lower surfaces of the flange, so that the irregular part will not be squeezed and deformed during pressing.

[0008] In some embodiments, the clamping part includes a first driving part and a limiting pressure plate; the first driving part is arranged on the frame; the limiting pressure plate is connected to the first driving part by transmission, and the first driving part drives the limiting pressure plate to rise and fall above the carrying platform. With such a design, after the part to be tested is placed in place, the first driving part works to drive the limiting pressure plate to descend until the limiting pressure plate presses the upper surface of the flange. The limiting pressure plate is designed to be in close contact with the upper surface of the flange, which can improve the sealing effect between the limiting pressure plate and the flange, thereby improving the airtightness test accuracy of the part to be tested.

[0009] In some embodiments, the pressing surface of the limiting pressure plate is provided with a contour sealing ring, and the contour sealing ring abuts against the upper surface of the flange. With such a design, when the first driving unit drives the limiting pressure plate to descend to compress the upper surface of the flange, the contour sealing ring abuts against the upper surface of the flange. The design of the contour sealing ring can, on the one hand, buffer the impact force of the limiting pressure plate on the irregular part during the descent process to reduce the risk of squeezing and deforming the irregular part, and on the other hand, the contour sealing ring can improve the sealing effect between the limiting pressure plate and the upper surface of the flange, which can further improve the airtightness test accuracy of the part to be tested.

[0010] In some embodiments, a guide column is provided at the edge of the limit pressure plate, and a limit guide part is provided on the bearing platform, and the guide column cooperates with the limit guide part to control the downward pressure of the limit pressure plate. With such a design, when the first driving part drives the limit pressure plate to descend, when the guide column is stuck in the limit guide part, the limit pressure plate will no longer continue to descend, thereby effectively controlling the downward pressure of the limit pressure plate on the irregular part, so that the limit pressure plate will not generate excessive downward pressure on the irregular part, and reduce the risk of squeezing and deforming the irregular part.

[0011] In some embodiments, the undercut portion is connected to the bottom of the limiting pressure plate so as to rise and fall with the limiting pressure plate. Such a design can drive the undercut portion to rise and fall together with the limiting pressure plate, so that the undercut portion only needs to rise and fall a short distance during the undercut process, which can shorten the lifting distance of the undercut portion itself.

[0012] In some embodiments, the undercut portion includes a second drive portion, a third drive portion, and an undercut plate; the second drive portion is disposed on the limiting pressure plate; the third drive portion is transmission-connected to the second drive portion, and the second drive portion drives the third drive portion to rise and fall; the undercut plate is transmission-connected to the third drive portion, and the third drive portion drives the undercut plate to extend and retract, and the undercut plate is located below the flange when extended. With such a design, after the first drive portion drives the limiting pressure plate to descend to the upper surface that presses the flange, the second drive portion drives the third drive portion and the undercut plate to descend, so that the undercut plate extends into the interior of the irregular portion, and then the third drive portion drives the undercut plate to extend to the bottom of the flange, and then the second drive portion drives the third drive portion and the undercut plate to rise, until the undercut plate is inverted on the lower surface of the flange, so that the flange is clamped between the limiting pressure plate and the undercut plate. After the airtight test is completed, the second driving unit first drives the third driving unit and the inverted plate to descend so that the inverted plate is separated from the lower surface of the flange, and then the third driving unit drives the inverted plate to retract, and then the second driving unit drives the third driving unit and the inverted plate to rise and reset again, and finally the first driving unit drives the limiting pressure plate to rise and reset, and at the same time drives the inverted part to rise and reset.

[0013] In some embodiments, the first clamping assembly includes a circumferential clamping member, a first top clamping member, and a second top clamping member; the circumferential clamping member can move above the bearing platform to compress or release the outer peripheral surface of the main body; the first top clamping member can be raised and lowered above the bearing platform to compress or release the upper surface of the main body; the second top clamping member can be raised and lowered above the bearing platform and spaced apart from the first top clamping member to compress or release the upper surface of the main body. With such a design, after the part to be tested is placed in place, the circumferential clamping member works to compress and position the outer periphery of the main body; then the first top clamping member and the second top clamping member work to compress the upper surface of the main body, so that the main body fits tightly against the bearing platform, which can improve the sealing of the first sealed cavity between the main body and the bearing platform, thereby improving the accuracy of the airtight test.

[0014] In some embodiments, the circumferential clamping member includes a plurality of circumferential clamping units, and the plurality of circumferential clamping units are distributed at intervals along the circumference of the main body portion, and the circumferential clamping units include a fourth driving unit and a clamping arm; the fourth driving unit is arranged on the frame; the clamping arm is transmission-connected to the fourth driving unit, and the fourth driving unit drives the clamping arm to swing. With such a design, after the part to be tested is placed in place, the fourth driving unit drives the clamping arm to swing downward until the clamping arm is pressed against the outer peripheral surface of the main body portion. Under the simultaneous clamping of the plurality of clamping units, the four sides of the main body portion can be clamped to accurately position the part to be tested. After the airtightness test is completed, the fifth driving unit drives the clamping arm to swing upward, and the paper clamping arm is separated from the outer peripheral surface of the main body portion, thereby releasing the part to be tested.

[0015] In some embodiments, the first top clamping member includes a plurality of top clamping units, and the plurality of top clamping units are spaced apart along the length direction of the main body portion, and the top clamping unit includes a pressure strip and a clamping arm; the pressure strip is pressed against the upper surface of the main body portion; and the clamping arm clamps or releases the pressure strip. With such a design, after the circumferential clamping member presses the four sides of the main body portion, the pressure strip is pressed against the upper surface of the main body portion, and the clamping arm is used to clamp the pressure strip. This can effectively control the pressure of the pressure strip on the main body portion, thereby avoiding bulging and deformation of the main body portion during the pressing process, and at the same time, ensuring that no air leakage occurs between the main body portion and the supporting platform, thereby improving the accuracy of the airtight test. In addition, by using a plurality of top clamping units to press the main body portion, the pressing force can be evenly distributed at various positions of the main body portion, thereby avoiding warping and deformation of the main body portion during the pressing process.

[0016] In some embodiments, the second top clamping member includes a fifth driving part and a clamping plate; the fifth driving part is arranged on the frame; the clamping plate is connected to the fifth driving part by transmission, and the fifth driving part drives the clamping plate to rise and fall. With such a design, after the circumferential clamping member clamps the four sides of the main body, the fifth driving part can also drive the clamping plate to descend, and clamp the clamping plate on the upper surface of the main body, so that the clamping strip and the clamping plate can be clamped on different positions of the upper surface of the main body at the same time, so that the clamping force can be more evenly distributed at various positions of the main body, and the main body can be prevented from warping and deforming during the clamping process.

[0017] In some embodiments, the carrying platform is also provided with a sensor, which is used to detect whether the part to be tested is placed in place. With such a design, when the part to be tested is placed in place, the sensor light will light up before the subsequent actions can be performed. If the sensor light cannot light up normally, it means that the part to be tested is not placed in place and the subsequent actions cannot be performed. Therefore, the design of the sensor can improve the airtightness test accuracy of the part to be tested.

[0018] In some embodiments, the carrier platform is further provided with a positioning pin, which is used to cooperate with the positioning hole of the part to be tested. With such a design, when placing the part to be tested, the positioning hole of the part to be tested needs to be aligned with the positioning pin on the carrier platform so that the positioning pin is inserted into the positioning hole to position the part to be tested, thereby improving the placement accuracy of the part to be tested.

[0019] The present application also provides an airtight testing device, including the above-mentioned airtight testing tool, air supply equipment and airtightness detector, the air supply equipment is used to inflate the first sealed cavity and the second sealed cavity of the airtight testing tool; the airtightness detector is used to detect the air pressure changes in the first sealed cavity and the second sealed cavity.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and in order to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the airtight test tool of the present application from a first perspective when the part to be tested is pressed;

[0023] Figure 2 This is a structural schematic diagram of another perspective of an embodiment of the airtight test tool of the present application when the part to be tested is pressed;

[0024] Figure 3 This is a side view of an embodiment of the airtight test tool of the present application when pressing the part to be tested;

[0025] Figure 4 This is a top view of an embodiment of the airtight test tool of the present application when the part to be tested is pressed;

[0026] Figure 5 This is a schematic diagram of the structure of an embodiment of the airtight test tool of the present application when releasing the part to be tested;

[0027] Figure 6 A side view of an embodiment of the airtight test tool of the present application when releasing a part to be tested;

[0028] Figure 7 A top view of an embodiment of the airtight test tool of the present application when releasing a part to be tested;

[0029] Figure 8 This is a partial structural schematic diagram of an embodiment of the airtight test tooling of the present application from a first perspective;

[0030] Fig. 9 This is a partial structural schematic diagram of another perspective of an embodiment of the airtight testing tool of the present application;

[0031] Fig.10 This is a partial schematic diagram of the position of the first embodiment of the airtight test tooling of the present application;

[0032] Fig.11 A partial schematic diagram of another position of an embodiment of the airtight test tool of the present application;

[0033] Fig.12 A partial schematic diagram of another position of an embodiment of the airtight test tool of the present application;

[0034] Fig.13 This is a schematic diagram of the structure of a contoured sealing ring in an embodiment of an airtight testing tool of the present application;

[0035] Fig.14 It is a schematic diagram of the structure of the part to be tested.

[0036] Description of Figure Numbers:

[0037]

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0042] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] As a new type of secondary battery, lithium-ion battery has the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. It has broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.

[0047] With the rapid development and application of new energy technologies, new energy batteries as core energy storage devices, the lithium battery industry has flourished, and the requirements and technologies for core power cells are constantly improving. The most important issue is safety. The battery box that carries and wraps the power cells is the first barrier to cell safety. If the sealing performance of the battery box is poor, it will cause serious damage to electrical safety and battery performance.

[0048] In the related art, the traditional airtightness test tooling can only perform airtightness tests on battery boxes with regular surfaces, but cannot perform airtightness tests on battery boxes with irregular surfaces.

[0049] It should be noted that the battery case has special structures such as convex humps, which are irregular parts of the battery case, and the irregular parts are weaker than other positions (thickness is less than 0.7mm). If traditional airtight testing tooling is used to perform airtightness testing on a battery case with an irregular surface, the battery case will be squeezed and deformed. Therefore, traditional airtight testing tooling cannot be used to perform airtightness testing on a battery case with an irregular surface.

[0050] Based on the above problems, the present invention proposes an airtight testing tool 100, which is intended to detect the airtightness of a battery box with an irregular surface.

[0051] See also Figures 1 to 14 In one embodiment of the present invention, the airtight test fixture 100 includes a frame 10, a carrying platform 20, a first clamping assembly 30 and a second clamping assembly 40; the carrying platform 20 is arranged on the frame 10, and is used to carry the part to be tested 200, and the part to be tested 200 includes a main body part 210 and an irregular part 220; the first clamping assembly 30 is arranged on the frame 10, and is used to clamp or release the main body part 210, and can make the main body part 210 and the carrying platform 20 enclosed to form a first sealed cavity; the second clamping assembly 40 is arranged on the frame 10, and includes a clamping part 41 and an undercut part 42, the clamping part 41 and the undercut part 42 can be raised and lowered above the carrying platform 20, the clamping part 41 and the undercut part 42 are clamped on the two opposite surfaces of the irregular part 220, and the irregular part 220, the carrying platform 20 and the clamping part 41 are enclosed to form a second sealed cavity.

[0052] It can be understood that the frame 10 can be designed as a frame to support the fixed bearing platform 20 , the first clamping assembly 30 and the second clamping assembly 40 .

[0053] It should be noted that the part to be tested 200 can be a cover of a battery box or other parts that need to be tested for airtightness. The irregular portion 220 of the cover can be a convex hull, which is designed as a panel to form an internal hollow structure, and the top of the convex hull is provided with an inwardly folded flange 221.

[0054] In this embodiment, the first sealed cavity and the second sealed cavity may be independent of each other or may be interconnected. When the first sealed cavity and the second sealed cavity are independent of each other, the first sealed cavity and the second sealed cavity may be inflated by the air supply device to perform an airtight test; when the first sealed cavity and the second sealed cavity are interconnected, the airtight test may be performed by inflating at least one of the first sealed cavity and the second sealed cavity by the air supply device.

[0055] Optionally, a gas supply device can be used to compress air or other gases to generate a certain pressure, and then transfer the pressurized gas to the first sealed cavity and the second sealed cavity through a pipeline or other device. When there is leakage or poor sealing in the first sealed cavity and the second sealed cavity, the gas in the first sealed cavity and the second sealed cavity will escape, resulting in a change in gas pressure. By detecting the change in gas pressure, it is determined whether the sealing performance of the part to be tested 200 is qualified. During the test process, the flow and pressure change of the gas are based on the principle of fluid mechanics. When there is a leak or poor sealing in the part to be tested 200, the gas will flow along the pressure gradient, resulting in a change in the pressure value detected by the airtightness detector. By analyzing the change in gas pressure, it can be determined whether the sealing performance of the part to be tested 200 meets the requirements. Specifically for the detection of the cover of the battery box, the gas supply device fills the first sealed cavity and the second sealed cavity with gas of a certain pressure, and then determines the sealing performance of the cover by measuring the change in air pressure. If the sealing performance of the cover is good, the air pressure change is small; if there is a leak, the air pressure change will be relatively large. In this way, the air leakage of the cover can be detected quickly and accurately, so as to determine whether its air tightness meets the requirements.

[0056] Optionally, when leakage is detected in the part to be tested 200, a penetrant may be sprayed onto the part to be tested 200, and then the part to be tested 200 may be blown with an air gun to find the specific location of the leakage in the part to be tested 200, so that the user can perform repairs.

[0057] In actual application, the first clamping assembly 30 can specifically use a clamping plate, a clamping strip, a clamping block and other structures to clamp the main body 210 of the part to be tested 200, as long as a first sealed cavity can be formed between the main body 210 and the supporting platform 20 when the main body 210 is clamped.

[0058] In actual application, the clamping part 41 of the second clamping assembly 40 can also use a clamping plate, a clamping strip, a clamping block and other structures to clamp one surface of the irregular part 220, and the undercut part 42 can also use a clamping plate, a clamping strip, a clamping block and other structures to be inverted on the other surface of the irregular part 220, so that the two opposite surfaces of the irregular part 220 can be clamped by the clamping part 41 and the undercut part 42, so that a second sealed cavity can be formed between the irregular part 220, the supporting platform 20 and the clamping part 41.

[0059] In summary, in the technical scheme of the embodiment of the present application, when the airtight test fixture 100 proposed in the technical scheme of the present invention performs an airtight test on the part to be tested 200, the part to be tested 200 including the main body part 210 and the irregular part 220 is first placed on the carrying platform 20; the first clamping assembly 30 clamps the main body part 210 to form a first sealed cavity between the main body part 210 and the carrying platform 20; the clamping part 41 and the undercut part 42 of the second clamping assembly 40 can clamp the two opposite surfaces of the irregular part 220 to form a second sealed cavity between the irregular part 220 and the carrying platform 20 and the clamping part 41; the first sealed cavity and the second sealed cavity are inflated, and the air pressure changes in the first sealed cavity and the second sealed cavity are detected, so that the sealing of the part to be tested 200 can be judged according to the air pressure changes. Among them, since the irregular part 220 of the part to be tested 200 adopts the clamping part 41 and the undercut part 42 to clamp the two opposite surfaces of the irregular part 220, the irregular part 220 will not be squeezed and deformed during clamping. Therefore, this solution can perform airtightness detection on the battery box with irregular surface.

[0060] In one embodiment of the present application, Fig.10 , Fig.14 The top of the irregular portion 220 has a flange 221 ; the pressing portion 41 and the undercut portion 42 are clamped on the upper and lower surfaces of the flange 221 .

[0061] With such a design, since the top of the irregular portion 220 of the part 200 to be tested has a flange 221, when the part 200 to be tested is subjected to an airtightness test, the clamping portion 41 can be pressed against the upper surface of the flange 221, and the undercut portion 42 can be undercut on the lower surface of the flange 221, so that the clamping portion 41 and the undercut portion 42 are clamped on the upper and lower surfaces of the flange 221, so that the irregular portion 220 will not be squeezed and deformed during clamping.

[0062] In actual application, the clamping part 41 of the second clamping assembly 40 can also use a clamping plate, a clamping strip, a clamping block and other structures to clamp the upper surface of the flange 221, and the undercut part 42 can also use a clamping plate, a clamping strip, a clamping block and other structures to be inverted on the lower surface of the flange 221, so as to clamp the flange 221 of the irregular part 220 through the clamping part 41 and the undercut part 42, so that a second sealed cavity can be formed between the irregular part 220 and the supporting platform 20 and the clamping part 41.

[0063] In one embodiment of the present application, Figures 8 to 10 The clamping part 41 includes a first driving part 411 and a limiting pressing plate 412; the first driving part 411 is arranged on the frame 10; the limiting pressing plate 412 is transmission-connected to the first driving part 411, and the first driving part 411 drives the limiting pressing plate 412 to rise and fall above the carrying platform 20.

[0064] With such a design, after the part 200 to be tested is placed in place, the first driving part 411 works to drive the limiting pressure plate 412 to descend until the limiting pressure plate 412 presses the upper surface of the flange 221. The limiting pressure plate 412 is designed to be in close contact with the upper surface of the flange 221, which can improve the sealing effect between the limiting pressure plate 412 and the flange 221, thereby improving the airtight test accuracy of the part 200 to be tested.

[0065] In actual application, the first driving part 411 can be a cylinder, a structure in which a motor and a gear rack cooperate, a structure in which a motor and a conveyor belt cooperate, etc., as long as it can drive the limiting pressure plate 412 to rise and fall above the supporting platform 20, no specific limitation is made here.

[0066] In one embodiment of the present application, Fig.13 The pressing surface of the limiting pressing plate 412 is provided with a contour sealing ring 4121 . When the pressing portion 41 presses the upper surface of the flange 221 , the contour sealing ring 4121 abuts against the upper surface of the flange 221 .

[0067] In this embodiment, the shape of the contoured sealing ring 4121 matches the shape of the flange 221 of the irregular portion 220 .

[0068] With such a design, when the first driving part 411 drives the limiting pressure plate 412 to descend to press the upper surface of the flange 221, the contour sealing ring 4121 abuts against the upper surface of the flange 221. The design of the contour sealing ring 4121 can, on the one hand, buffer the impact force of the limiting pressure plate 412 on the irregular part 220 during the descent process, so as to reduce the risk of squeezing and deforming the irregular part 220. On the other hand, the contour sealing ring 4121 can improve the sealing effect between the limiting pressure plate 412 and the upper surface of the flange 221, thereby further improving the airtight test accuracy of the part 200 to be tested.

[0069] In one embodiment of the present application, Fig.10 A guide column 4122 is provided at the edge of the limiting pressure plate 412 , and a limiting guide portion 21 is provided on the carrying platform 20 . The guide column 4122 cooperates with the limiting guide portion 21 to control the downward pressure of the limiting pressure plate 412 .

[0070] With such a design, when the guide column 4122 is stuck in the limiting guide part 21 during the process of the first driving part 411 driving the limiting pressure plate 412 to descend, the limiting pressure plate 412 will no longer continue to descend, thereby effectively controlling the downward pressure of the limiting pressure plate 412 on the irregular part 220, so that the limiting pressure plate 412 will not generate excessive downward pressure on the irregular part 220, thereby reducing the risk of squeezing and deforming the irregular part 220.

[0071] Optionally, the limiting guide portion 21 may have a limiting groove, and when the guide column 4122 is inserted into the limiting groove and abuts against the bottom of the limiting groove, the guide column 4122 can be limited.

[0072] In one embodiment of the present application, Figures 8 to 10 The undercut portion 42 is connected to the bottom of the limiting pressing plate 412 to rise and fall with the limiting pressing plate 412. It can be understood that when the first driving portion 411 drives the limiting pressing plate 412 to rise and fall, the undercut portion 42 will be driven to rise and fall together.

[0073] Such a design can drive the undercut portion 42 to rise and fall together with the lifting and falling of the limiting pressure plate 412, so that the undercut portion 42 only needs to rise and fall a short distance during the undercut process, which can shorten the lifting distance of the undercut portion 42 itself.

[0074] In one embodiment of the present application, Fig. 9 The undercut portion 42 includes a second driving portion 421, a third driving portion 422 and an undercut plate 423; the second driving portion 421 is arranged on the limiting pressure plate 412; the third driving portion 422 is transmission-connected to the second driving portion 421, and the second driving portion 421 drives the third driving portion 422 to rise and fall; the undercut plate 423 is transmission-connected to the third driving portion 422, and the third driving portion 422 drives the undercut plate 423 to extend and retract, and the undercut plate 423 is located below the flange 221 when extended.

[0075] With such a design, after the first driving part 411 drives the limiting pressure plate 412 to descend to press the upper surface of the flange 221, the second driving part 421 drives the third driving part 422 and the undercut plate 423 to descend so that the undercut plate 423 extends into the interior of the irregular part 220, and then the third driving part 422 drives the undercut plate 423 to extend to the bottom of the flange 221, and then the second driving part 421 drives the third driving part 422 and the undercut plate 423 to rise until the undercut plate 423 is inverted on the lower surface of the flange 221, so that the flange 221 is clamped between the limiting pressure plate 412 and the undercut plate 423. After the airtightness test is completed, the third driving part 422 and the undercut plate 423 are first driven downward by the second driving part 421 to separate the undercut plate 423 from the lower surface of the flange 221, and then the third driving part 422 drives the undercut plate 423 to retract, and then the second driving part 421 drives the third driving part 422 and the undercut plate 423 to rise and reset again, and finally the first driving part 411 drives the limiting pressure plate 412 to rise and reset, and at the same time drives the undercut part 42 to rise and reset.

[0076] In actual application, the second driving part 421 can be a cylinder, a structure in which a motor cooperates with a gear rack, a structure in which a motor cooperates with a conveyor belt, etc., as long as it can drive the third driving part 422 and the undercut plate 423 to rise and fall, and no specific limitation is made here. Similarly, the third driving part 422 can also be a cylinder, a structure in which a motor cooperates with a gear rack, a structure in which a motor cooperates with a conveyor belt, etc., as long as it can drive the undercut plate 423 to extend or retract, and no specific limitation is made here.

[0077] In one embodiment of the present application, Figures 1 to 7 The first clamping assembly 30 includes a circumferential clamping member 31, a first top clamping member 32 and a second top clamping member 33; the circumferential clamping member 31 can move above the supporting platform 20 to clamp or release the outer circumferential surface of the main body part 210; the first top clamping member 32 can be raised and lowered above the supporting platform 20 to clamp or release the upper surface of the main body part 210; the second top clamping member 33 can be raised and lowered above the supporting platform 20 and is spaced apart from the first top clamping member 32 to clamp or release the upper surface of the main body part 210.

[0078] With this design, after the part 200 to be tested is placed in place, the circumferential clamping member 31 works to clamp and position the four sides of the main body part 210; then the first top clamping member 32 and the second top clamping member 33 work to clamp the upper surface of the main body part 210, so that the main body part 210 fits tightly with the supporting platform 20, which can improve the sealing of the first sealed cavity between the main body part 210 and the supporting platform 20, thereby improving the accuracy of the airtight test.

[0079] In one embodiment of the present application, Figure 2 , Figure 5 , Fig.11 The circumferential clamping member 31 includes a plurality of circumferential clamping units 31a, which are distributed at circumferential intervals along the main body portion 210, and the circumferential clamping units 31a include a fourth driving portion 311 and a clamping arm 312; the fourth driving portion 311 is disposed on the frame 10; the clamping arm 312 is transmission-connected to the fourth driving portion 311, and the fourth driving portion 311 drives the clamping arm 312 to swing.

[0080] With this design, after the part 200 to be tested is placed in place, the fourth driving unit 311 drives the clamping arm 312 to swing downward until the clamping arm 312 is pressed against the outer peripheral surface of the body part 210. With the simultaneous clamping of multiple clamping units, the body part 210 can be clamped around to accurately position the part 200 to be tested. After the airtight test is completed, the fifth driving unit 331 drives the clamping arm 312 to swing upward, and the paper clamping arm 312 is separated from the outer peripheral surface of the body part 210, thereby releasing the part 200 to be tested.

[0081] In actual application, the fourth driving part 311 can be a cylinder, a structure in which a motor and a gear rack cooperate, a structure in which a motor and a conveyor belt cooperate, etc., as long as it can drive the clamping arm 312 to swing, and no specific limitation is made here.

[0082] In one embodiment of the present application, Figure 2 , Figure 5 , Fig.11 The first top clamping member 32 includes a plurality of top clamping units 32a, which are spaced apart along the length direction of the main body portion 210, and the top clamping units 32a include a pressure strip 321 and a clamping arm 322; the pressure strip 321 is pressed against the upper surface of the main body portion 210; and the clamping arm 322 clamps or releases the pressure strip 321.

[0083] With this design, after the circumferential pressing member 31 presses the four sides of the main body 210, the pressure strip 321 is pressed against the upper surface of the main body 210, and the clamp arm 322 is used to clamp the pressure strip 321, which can effectively control the pressure of the pressure strip 321 on the main body 210, avoiding the bulging and deformation of the main body 210 during the pressing process, and at the same time ensuring that there is no air leakage between the main body 210 and the supporting platform 20, thereby improving the accuracy of the airtight test. In addition, by using multiple top pressing units 32a to press the main body 210, the pressing force can be evenly distributed at various positions of the main body 210, avoiding the warping and deformation of the main body 210 during the pressing process.

[0084] Optionally, in order to prevent one end of the pressure strip 321 from tilting up, clamping arms 322 may be provided at both ends of the pressure strip 321 so that the pressure strip 321 can be better pressed against the upper surface of the main body 210 by the clamping arms 322 at both ends.

[0085] In one embodiment of the present application, Figure 3 , Figure 6 , Figure 8 The second top pressing member 33 includes a fifth driving part 331 and a pressing plate 332 ; the fifth driving part 331 is disposed on the frame 10 ; the pressing plate 332 is transmission-connected to the fifth driving part 331 , and the fifth driving part 331 drives the pressing plate 332 to rise and fall.

[0086] With such a design, after the circumferential pressing member 31 presses the four sides of the main body 210, the fifth driving part 331 can also drive the pressure plate 332 to descend and press the pressure plate 332 against the upper surface of the main body, so that the pressure strip 321 and the pressure plate 332 can be simultaneously pressed on different positions of the upper surface of the main body 210, which can make the pressing force more evenly distributed at various positions of the main body 210 and avoid the main body 210 from warping and deforming during the pressing process.

[0087] In actual application, the fifth driving part 331 can be a cylinder, a structure in which a motor and a gear rack cooperate, a structure in which a motor and a conveyor belt cooperate, etc., as long as it can drive the pressure plate 332 to rise and fall, and no specific limitation is made here.

[0088] In one embodiment of the present application, Fig.11 The carrying platform 20 is also provided with a sensor 22, and the sensor 22 is used to detect whether the part 200 to be tested is placed in place.

[0089] With such a design, when the part 200 to be tested is placed in place, the light of the sensor 22 will light up before the subsequent actions can be performed. If the light of the sensor 22 cannot light up normally, it means that the part 200 to be tested is not placed in place and the subsequent actions cannot be performed. Therefore, the design of the sensor 22 can improve the accuracy of the airtight test of the part 200 to be tested.

[0090] In one embodiment of the present application, Fig.12 The carrying platform 20 is also provided with a positioning pin 23, and the positioning pin 23 is used to cooperate with the positioning hole of the part to be tested 200.

[0091] With such a design, when placing the part 200 to be tested, it is necessary to align the positioning hole of the part 200 to be tested with the positioning pin 23 on the supporting platform 20 so that the positioning pin 23 is inserted into the positioning hole to position the part 200 to be tested, thereby improving the placement accuracy of the part 200 to be tested.

[0092] Combined with reference Figures 1 to 14 The present invention also proposes an airtight test device, which includes an airtight test fixture 100, an air supply device, and an airtight detector. The specific structure of the airtight test fixture 100 refers to the above embodiment. Since the airtight test device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the air supply device is used to inflate the first sealed cavity and the second sealed cavity of the airtight test fixture 100; the airtight detector is used to detect the air pressure changes in the first sealed cavity and the second sealed cavity.

[0093] According to some embodiments of the present application, the present application provides an airtight test tool 100, in combination with reference to Figures 1 to 14The airtight test fixture 100 includes a frame 10, a carrying platform 20, a first clamping assembly 30 and a second clamping assembly 40; the carrying platform 20 is arranged on the frame 10, and is used to carry a part to be tested 200, and the part to be tested 200 includes a body part 210 and an irregular part 220, and the top of the irregular part 220 has a flange 221; the first clamping assembly 30 is arranged on the frame 10, and is used to clamp or release the body part 210; the second clamping assembly 40 is arranged on the frame 10, and includes a clamping portion 41 and an undercut portion 42, and the clamping portion 41 can be on the carrying platform 20 The undercut portion 42 can be lifted and lowered above the supporting platform 20 to press or release the upper surface of the flange 221, and the undercut portion 42 can be lifted and lowered above the supporting platform 20 to extend into the interior of the irregular portion 220 to be undercut on the lower surface of the flange 221; wherein, when the first clamping assembly 30 presses the main body portion 210, a first sealed cavity is formed between the main body portion 210 and the supporting platform 20; when the clamping portion 41 presses the upper surface of the flange 221 and the undercut portion 42 is undercut on the lower surface of the flange 221, a second sealed cavity is formed between the irregular portion 220, the supporting platform 20 and the clamping portion 41.

[0094] The first clamping assembly 30 includes a circumferential clamping member 31, a first top clamping member 32 and a second top clamping member 33. The clamping portion 41 includes a first driving portion 411 and a limiting pressure plate 412. The undercut portion 42 includes a second driving portion 421, a third driving portion 422 and an undercut plate 423; the second driving portion 421 is arranged on the limiting pressure plate 412; the third driving portion 422 is transmission-connected to the second driving portion 421, and the second driving portion 421 drives the third driving portion 422 to rise and fall; the undercut plate 423 is transmission-connected to the third driving portion 422, and the third driving portion 422 drives the undercut plate 423 to extend and retract, and the undercut plate 423 is located below the flange 221 when extended. The carrying platform 20 is also provided with a sensor 22, and the sensor 22 is used to detect whether the part 200 to be tested is placed in place. The carrying platform 20 is also provided with a positioning pin 23, and the positioning pin 23 is used to cooperate with the positioning hole of the part 200 to be tested.

[0095] In the technical scheme of the embodiment of the present application, when the airtight test fixture 100 proposed in the technical scheme of the present invention performs an airtight test on the part to be tested 200, first, the positioning hole of the part to be tested 200 is aligned with the positioning pin 23 on the carrying platform 20 to place the part to be tested 200 on the carrying platform 20; the sensor 22 is used to detect whether the part to be tested 200 is placed in place; after the part to be tested 200 is placed in place, the circumferential clamping member 31 works to clamp and position the four sides of the main body part 210; then the first top clamping member 32 and the second top clamping member 33 work to clamp the upper surface of the main body part 210, so that the main body part 210 is tightly fitted with the carrying platform 20, so that a first sealed cavity is formed between the main body part 210 and the carrying platform 20. After the first driving part 411 drives the limiting pressing plate 412 to descend to the upper surface of the pressing flange 221, the second driving part 421 drives the third driving part 422 and the undercut plate 423 to descend, so that the undercut plate 423 extends into the interior of the irregular part 220, and then the third driving part 422 drives the undercut plate 423 to extend below the flange 221, and then the second driving part 421 drives the third driving part 422 and the undercut plate 423 to rise until the undercut plate 423 is undercut on the lower surface of the flange 221, so that the flange 221 is clamped between the limiting pressing plate 412 and the undercut plate 423, so that a second sealed cavity is formed between the irregular part 220 and the bearing platform 20 and the pressing part 41. The first sealed cavity and the second sealed cavity are inflated, and the air pressure changes of the first sealed cavity and the second sealed cavity are detected, so that the sealing of the part 200 to be tested can be judged according to the air pressure changes. Among them, since the irregular part 220 of the part to be tested 200 uses the clamping part 41 and the undercut part 42 to clamp the flange 221, the irregular part 220 will not be squeezed and deformed during clamping. Therefore, this solution can perform airtightness detection on battery boxes with irregular surfaces.

[0096] In one embodiment of the present application, the airtightness testing device operates as follows to test the airtightness of the part 200 to be tested:

[0097] The first step is to use a barcode scanner to scan and record the QR code of the part to be tested 200;

[0098] The second step is loading. Use the lifting device to move the part 200 to be tested, so that the positioning hole of the part 200 to be tested is aligned with the positioning pin 23 on the carrying platform 20, so as to place the part 200 to be tested on the carrying platform 20; use the sensor 22 to detect when the part 200 to be tested is in place. If it is in place, the sensor 22 light will be on and it can be started normally, otherwise it cannot be started;

[0099] Step 3: Press the start button or the screen to start automatically, and the circumferential pressing member 31 will start to press the periphery of the main body 210 of the part 200 to be tested;

[0100] In the fourth step, the first driving part 411 is actuated to drive the limiting pressing plate 412 to descend to a position to be pressed against the upper surface of the flange 221; the second driving part 421 and the third driving part 422 are actuated to drive the undercut plate 423 to be undercut against the lower surface of the flange 221, so that a second sealed cavity is formed between the irregular part 220 and the carrying platform 20 and the pressing part 41;

[0101] In the fifth step, the first top pressing member 32 and the second top pressing member 33 are actuated to press the upper surface of the body portion 210 of the part to be tested 200, so that a first sealed cavity is formed between the body portion 210 and the carrying platform 20;

[0102] Step 6: Enter the operation interface, press the inflation button, set the inflation pressure value, set the inflation time, constant pressure time, test time, pressure relief time, leakage value, and set and save for direct call next time. Then start to inflate the first sealed cavity and the second sealed cavity. The inflation volume can be displayed by the airtightness detector. Then stop inflating. After standing for a period of time, the airtightness detector can sense the changes in the air pressure of the first sealed cavity and the second sealed cavity through the connected air pipe, and obtain the leakage volume within a period of time. Then record the data results of the sealing test of the part 200 to be tested, and judge whether the product is qualified according to the leakage value. After the test is completed, the test results can be automatically recorded. When the leakage value is less than the standard value, the airtight machine instrument displays PASS for qualified; when the leakage value is greater than the standard value, the airtight machine instrument displays NG for unqualified, and then judge whether the sealing of the part 200 to be tested meets the standard. After the part 200 to be tested is tested, the airtight machine instrument will automatically release pressure and alarm; the internal leak detection system can automatically record the test results for quality traceability and control. When an alarm occurs, that is, a leak occurs, the leak can be found by spraying penetrant liquid and then blowing with an air gun. If the sealing meets the standard, it is considered qualified.

[0103] The eighth step is unloading. Use a sling to place the part 200 to be tested in place, clean the operation area, return the tools and materials to their original positions, properly handle the gas residues, and keep operation records, including operation time, pressure, operator and other information.

[0104] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An airtight test tool, characterized in that: include: frame; A carrying platform, arranged on the frame, for carrying a part to be tested, wherein the part to be tested comprises a main body part and an irregular part; A first pressing assembly, provided on the frame, for pressing or releasing the body portion, and enabling the body portion and the bearing platform to be enclosed to form a first sealed cavity; A second pressing assembly is provided on the frame and comprises a pressing portion and an undercut portion, wherein the pressing portion and the undercut portion can be raised and lowered above the bearing platform, the pressing portion and the undercut portion are clamped on two opposite surfaces of the irregular portion, and the irregular portion, the bearing platform and the pressing portion are enclosed to form a second sealed cavity; The top of the irregular portion has a flange; the pressing portion and the undercut portion are clamped on the upper and lower surfaces of the flange; The undercut portion comprises: A second driving part, provided on a limiting pressure plate of the pressing part; A third driving part, which is transmission-connected to the second driving part, and the second driving part drives the third driving part to move up and down; and The undercut plate is transmission-connected to the third driving unit, and the third driving unit drives the undercut plate to extend and retract, so that the undercut plate extends out and is located below the flange.

2. The airtight test tool as claimed in claim 1, characterized in that: The pressing portion comprises: A first driving unit, disposed on the frame; and The limiting pressure plate is transmission-connected to the first driving unit, and the first driving unit drives the limiting pressure plate to rise and fall above the carrying platform.

3. The airtight test tool as claimed in claim 2, characterized in that: The pressing surface of the position-limiting pressure plate is provided with a contour sealing ring, and the contour sealing ring abuts against the upper surface of the flange.

4. The airtight test tool as claimed in claim 2, characterized in that: A guide column is provided at the edge of the limit pressure plate, and a limit guide portion is provided at the bearing platform. The guide column cooperates with the limit guide portion to control the downward pressure of the limit pressure plate.

5. The airtight test tool as claimed in claim 2, characterized in that: The undercut portion is connected to the bottom of the limiting pressing plate so as to rise and fall along with the limiting pressing plate.

6. The airtight test tool according to any one of claims 1 to 5, characterized in that: The first pressing assembly comprises: A circumferential pressing member moves above the bearing platform to press or release the outer circumferential surface of the body portion; A first top pressing member is raised and lowered above the carrying platform to press or release the upper surface of the body portion; and The second top pressing member is raised and lowered above the bearing platform and is spaced apart from the first top pressing member to press or release the upper surface of the main body portion.

7. The airtight test tool as claimed in claim 6, characterized in that: The circumferential pressing member includes a plurality of circumferential pressing units, and the plurality of circumferential pressing units are distributed at intervals along the circumference of the body portion, and the circumferential pressing units include: a fourth driving unit, disposed on the frame; and The clamping arm is transmission-connected to the fourth driving part, and the fourth driving part drives the clamping arm to swing.

8. The airtight test tool as claimed in claim 6, characterized in that: The first top pressing member includes a plurality of top pressing units, and the plurality of top pressing units are spaced apart along the length direction of the body portion, and the top pressing units include: A pressure strip pressed tightly against the upper surface of the main body; A clamping arm clamps or releases the pressure strip.

9. The airtight test tool as claimed in claim 6, characterized in that: The second top pressing member comprises: A fifth driving unit, provided on the frame; The pressing plate is transmission-connected to the fifth driving unit, and the fifth driving unit drives the pressing plate to rise and fall.

10. The airtight test tool according to any one of claims 1 to 5, characterized in that: The carrying platform is also provided with a sensor, and the sensor is used to detect whether the part to be tested is placed in place.

11. The airtight test tool according to any one of claims 1 to 5, characterized in that: The bearing platform is also provided with a positioning pin, and the positioning pin is used to cooperate with the positioning hole of the part to be tested.

12. An airtight testing device, characterized in that: include: The airtight test tool as claimed in any one of claims 1 to 11; An air supply device, the air supply device is used to inflate the first sealed cavity and the second sealed cavity; An air tightness detector is used to detect changes in air pressure in the first sealed cavity and the second sealed cavity.

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