Air tightness detection sealing structure, tool and device
By designing a sealing structure for airtightness testing and utilizing a combination of auxiliary components and sealing strips, the problem of unstable sealing at the junction of the sealing strips was solved, achieving efficient and accurate airtightness testing.
Patent Information
- Application Number
- CN202520131908.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In existing technologies, the junction of the two sealing strips at the corners of sealed products is not easy to seal, which makes it easy for airtightness to leak and makes it impossible to accurately detect the true airtightness of the product.
Design an airtightness testing sealing structure, including an auxiliary component, a first sealing strip, and a second sealing strip. The auxiliary component and the test piece enclose a test cavity. The first sealing strip seals the outer wall joint, and the second sealing strip seals the corner joint. The sealing performance is improved by an arc groove or inclined surface design. The filler fills part of the test cavity.
The improved sealing of the test chamber ensures a stable test chamber during the testing process, enabling rapid and effective detection of the product's airtightness and improving the accuracy of the test results.
Smart Images
Figure CN223648537U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to sealing structures, tooling and devices for airtightness testing. Background Technology
[0002] Battery airtightness refers to the degree of sealing inside the battery, that is, whether it can effectively prevent impurities, moisture and internal gas from mixing inside the battery, as well as prevent leakage of internal dielectric liquid. Excellent battery sealing can effectively prevent the mixing of the internal and external environments of the battery pack, thereby ensuring the safety and performance of the battery cells.
[0003] To ensure the airtightness of the casing, each component of the casing (such as the lower casing, cold plate, casing, and inserts) must undergo individual simulated airtightness testing before shipment. Priority is given to ensuring the airtightness of each individual component or sub-assembly, especially the lower casing sub-assembly, which bears 3 / 4 of the entire battery pack. Most lower casing sub-assemblies (front, rear, left, and right side beam sub-assemblies) are connected by welding at the four corners. After welding, the overall frame and lower casing assembly are made airtight. A few lower casing sub-assemblies are supplied as sub-assemblies (front, rear, left, and right side beam sub-assemblies), and the four corners are connected by bolts after delivery to the battery manufacturer. Therefore, the front, rear, left, and right sub-assemblies also need to undergo individual simulated airtightness testing before shipment.
[0004] Currently, the main method involves forming a test chamber by integrally enclosing a sealing plate and the test piece, and then using sealing strips to create a line seal at the connection between the sealing plate and the test piece to test the product's airtightness. However, because the sealed product is a die-cast part, the radius of the outer arc corner (R-angle) cannot be made 0 due to factors such as demolding. The minimum R-angle radius is 0.5mm. This makes it difficult to seal the junction of the two sealing strips at the corner, resulting in poor sealing stability at the corner and easy leakage of airtightness, thus making it impossible to test the true airtightness of the product itself. Utility Model Content
[0005] This application provides an airtightness testing sealing structure, tooling, and device to solve the problem in the prior art that the junction of the two sealing strips at the corner of the product is not easy to seal, resulting in poor sealing stability at the corner, easy leakage of airtightness, and thus the inability to detect the true airtightness of the product itself.
[0006] On the one hand, this application provides an airtightness testing sealing structure, comprising:
[0007] The auxiliary component is used to abut against the outer wall of the test piece, and the auxiliary component and the test piece together form a test cavity;
[0008] The first sealing strip is set on the outer wall of the test piece to seal the joint between the auxiliary component and the outer wall of the test piece.
[0009] The second sealing strip is set at the corner of the test piece to seal the joint between the auxiliary component and the corner of the test piece.
[0010] The first and second sealing strips together seal the test chamber.
[0011] In one possible design, the second sealing strip has an arc-shaped groove on one side near the test piece, and the inner wall of the arc-shaped groove is used to abut against the corner of the test piece.
[0012] In one possible design, the two ends of the second sealing strip abut against the ends of the corresponding first sealing strip.
[0013] In one possible design, the two ends of the second sealing strip are respectively provided with bevels, which abut against the end face of the first sealing strip.
[0014] In one possible design, a filler material is also included, which is disposed in the test cavity to fill a portion of the test cavity.
[0015] In one possible design, the filler is a nylon contour material.
[0016] In one possible design, the auxiliary components include:
[0017] Base plate;
[0018] The first side plate and the second side plate are vertically mounted on the base plate, and the first side plate and the second side plate are positioned opposite each other, respectively abutting against the two opposite sides of the part to be tested;
[0019] The first end plate and the second end plate are vertically mounted on the base plate, with the first end plate and the second end plate facing each other and respectively abutting against the two opposite end faces of the part to be tested.
[0020] In one possible design, an auxiliary sealing strip is also included, which is disposed at the joint of any two of the base plate, the first side plate, the second side plate, the first end plate, and the second end plate.
[0021] On the other hand, this application also provides an airtightness testing fixture, including the airtightness testing sealing structure as described above.
[0022] Furthermore, this application also provides an airtightness testing device, including the airtightness testing fixture described above.
[0023] The beneficial effects of this application are as follows:
[0024] The airtightness testing sealing structure of this application, by setting an auxiliary component, abuts against the outer wall of the test piece, and the auxiliary component and the test piece together enclose a test chamber. By setting a first sealing strip, the joint between the auxiliary component and the outer wall of the test piece can be sealed, and by setting a second sealing strip, the joint between the corners of the auxiliary component and the test piece can be sealed, thereby improving the airtightness of the test chamber. This ensures that the airtight fixture can form a stable test chamber during the testing process, so as to quickly and effectively detect the airtightness of the product itself.
[0025] The airtightness testing fixture provided in this application includes the airtightness testing sealing structure of this application, and therefore also includes all the advantages of the airtightness testing sealing structure mentioned above.
[0026] The airtightness testing device provided in this application includes all the advantages of the airtightness testing fixture mentioned above. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0028] Figure 1 A schematic diagram of the overall structure of the airtightness testing sealing structure provided in the embodiments of this application;
[0029] Figure 2 A schematic diagram of the first sealing strip and the second sealing strip of the airtightness testing sealing structure provided in the embodiment of this application;
[0030] Figure 3 Another schematic diagram of the first and second sealing strips of the airtightness testing sealing structure provided in the embodiments of this application;
[0031] Figure 4 This is a schematic diagram of the structure of the first sealing strip and the second sealing strip in the prior art;
[0032] Figure 5 This is a schematic diagram of the structure of the part under test.
[0033] Figure label:
[0034] 100, Auxiliary component; 110, Base plate; 120, First side plate; 130, Second side plate; 140, First end plate; 150, Second end plate; 200, First sealing strip; 300, Second sealing strip; 310, Arc groove; 320, Inclined surface; 400, Test chamber; 500, Component to be tested. Detailed Implementation
[0035] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0036] As in the background art, due to the product under test (e.g., front beam, such as...) Figure 5 The part shown is a die-cast part. Due to process factors such as demolding, the radius of the outer arc corner (R-angle) of die-cast parts cannot be made to 0; the minimum R-angle radius is 0.5mm. This makes it difficult to seal the junction of the two sealing strips at the corner of the product under test (e.g., the front beam). (Refer to...) Figure 4 As shown, there are gaps at the corners of the product under test (e.g., the front beam), which makes the sealing stability at the corners poor and the airtightness easy to leak, thus making it impossible to test the true airtightness of the product itself.
[0037] The following is combined Figures 1-3 This describes the airtightness testing sealing structure provided in the embodiments of this application.
[0038] Reference Figure 1As shown, the airtightness testing sealing structure includes an auxiliary component 100, a first sealing strip 200, and a second sealing strip 300. The auxiliary component 100 is used to abut against the outer wall of the test piece 500, and the auxiliary component 100 and the test piece 500 together enclose the test cavity 400. The first sealing strip 200 is disposed at the outer wall of the test piece 500 and is used to seal the joint between the auxiliary component 100 and the outer wall of the test piece 500. The second sealing strip 300 is disposed at the corner of the test piece 500 and is used to seal the joint between the auxiliary component 100 and the corner of the test piece 500. The first sealing strip 200 and the second sealing strip 300 together seal the test cavity 400. In some specific embodiments, the auxiliary component 100 has a semi-enclosed structure, such as a groove-shaped structure. By placing the test piece 500 at the opening of the groove-shaped structure, the inner wall of the groove-shaped structure abuts against the outer wall of the test piece 500, allowing the groove-shaped structure and the test piece 500 to jointly enclose and form the test cavity 400. In some specific embodiments, the first sealing strip 200 and the second sealing strip 300 are made of nitrile rubber, which is wear-resistant, corrosion-resistant, and has a long service life, ensuring effective sealing of the joint between the auxiliary component 100 and the test piece 500, achieving a stable seal for the test cavity 400. In some specific embodiments, the second sealing strip 300 forms a 45° angle with the first sealing strip 200, allowing the second sealing strip 300 to effectively contact the arc-shaped surface at the corner of the test piece 500, thereby effectively sealing any leaks at the corner of the test piece 500.
[0039] Using the technical solution provided in the above embodiments, by setting an auxiliary component 100, the auxiliary component 100 abuts against the outer wall of the test piece 500, and the auxiliary component 100 and the test piece 500 together enclose a test cavity 400. By setting a first sealing strip 200, the joint between the auxiliary component 100 and the outer wall of the test piece 500 can be sealed. By setting a second sealing strip 300, the joint between the corners of the auxiliary component 100 and the test piece 500 can be sealed, thereby improving the sealing performance of the test cavity 400. This ensures that the airtight fixture can form a stable test cavity 400 during the testing process, so as to quickly and effectively detect the airtightness of the product itself.
[0040] Reference Figure 2As shown in some embodiments provided in this application, an arc-shaped groove 310 is provided on one side of the second sealing strip 300 near the test piece 500. The inner wall of the arc-shaped groove 310 is used to abut against the corner of the test piece 500. By providing an arc-shaped groove 310 on one side of the second sealing strip 300 near the test piece 500, the tightness between the second sealing strip 300 and the corner of the test piece 500 can be improved, ensuring that the arc-shaped surface at the corner of the second sealing strip 300 and the test piece 500 are in complete and sufficient contact. This ensures that the gaps between the second sealing strip 300 and the arc-shaped surface at the corner of the test piece 500 can be effectively sealed, preventing leaks from affecting the test results during testing.
[0041] Reference Figure 2 As shown, in some embodiments provided in this application, the two ends of the second sealing strip 300 abut against the corresponding ends of the first sealing strip 200. In some specific embodiments, the end of the first sealing strip 200 near the second sealing strip 300 has a chamfer. The second sealing strip 300 is pushed toward the test piece 500 in a direction perpendicular to the second sealing strip 300, so that one side of the second sealing strip 300 abuts against the chamfer, thereby achieving a seamless connection between the first sealing strip 200 and the second sealing strip 300 and preventing air leakage at the sealing strip connection.
[0042] Reference Figure 3 As shown, in some specific embodiments, the second sealing strip 300 has inclined surfaces 320 at both ends, which abut against the end faces of the first sealing strip 200. Specifically, the second sealing strip 300 has a trapezoidal structure. By pushing the second sealing strip 300 toward the test piece 500 in a direction perpendicular to the second sealing strip 300 until the inclined surfaces 320 of the second sealing strip 300 abut against the ends of the second sealing strip 300 on both sides, the inner side of the second sealing strip 300 and the corner of the test piece 500 are pressed against each other. At the same time, the first sealing strip 200 and the second sealing strip 300 are tightly pressed together, thereby achieving a seamless connection between the first sealing strip 200, the second sealing strip 300 and the test piece 500, avoiding air leakage, thereby improving the sealing performance of the test chamber 400. This ensures that the airtight fixture can form a stable test chamber 400 during the testing process, improving the accuracy of the airtightness test results.
[0043] In some embodiments provided in this application, the airtightness testing sealing structure further includes a filler material disposed in the test chamber 400 to partially fill the test chamber 400. Specifically, the filler material is a nylon profile. Generally, after filling with the nylon profile, the remaining volume of the test chamber 400 is 0.5L. By using a nylon profile to partially fill the test chamber 400, the test volume can be effectively reduced, thereby improving the test cycle time and test accuracy.
[0044] Reference Figure 1 As shown, in some embodiments provided in this application, the auxiliary component 100 includes a base plate 110, a first side plate 120, a second side plate 130, a first end plate 140, and a second end plate 150. The base plate 110 is placed horizontally, and the test piece 500 is placed on the base plate 110. The first side plate 120, the second side plate 130, the first end plate 140, and the second end plate 150 are respectively perpendicular to the base plate 110. The first side plate 120 and the second side plate 130 are respectively disposed at the front and rear of the base plate 110. The first side plate 120 and the second side plate 130 are respectively disposed at the front and rear of the base plate 110. The second side plate 130 is disposed opposite to the first side plate 120 and the second side plate 130 respectively abut against the two opposite sides of the test piece 500; the first end plate 140 and the second end plate 150 are respectively disposed on the left and right sides of the base plate 110, the first end plate 140 and the second end plate 150 are disposed opposite to each other, and the first end plate 140 and the second end plate 150 respectively abut against the two opposite end faces of the test piece 500. In this way, by setting multiple spliced plates, the adaptability of the auxiliary component 100 to different test pieces can be improved. In some specific embodiments, the airtightness testing sealing structure also includes an auxiliary sealing strip, which is disposed at the joint of any two of the base plate 110, the first side plate 120, the second side plate 130, the first end plate 140 and the second end plate 150, thereby ensuring a sealed connection between the base plate 110, the first side plate 120, the second side plate 130, the first end plate 140 and the second end plate 150.
[0045] The working principle of the airtightness testing sealing structure in this application is as follows:
[0046] The first side plate 120, the second side plate 130, the first end plate 140 and the second end plate 150 are respectively connected to the base plate 110, and the outer wall of the test piece 500 abuts against the inner side of the first side plate 120, the second side plate 130, the first end plate 140 and the second end plate 150 respectively.
[0047] The first sealing strip 200 is sealed at the mating edge between the outer wall of the test piece 500 and the first side plate 120 / second side plate 130 / first end plate 140 / second end plate 150;
[0048] The second sealing strip 300 is used to seal the corner of the test piece 500 at the mating edge of the first side plate 120 / second side plate 130 / first end plate 140 / second end plate 150;
[0049] The second sealing strip 300 is pushed toward the test piece 500 in a direction perpendicular to the second sealing strip 300, so that the inner side of the second sealing strip 300 abuts against the corner of the test piece 500, and the end of the second sealing strip 300 abuts against the first sealing strip 200, thus completing the assembly of the sealing structure and making the second sealing strip 300 firmly cover the corner of the test piece 500.
[0050] Inflate the test chamber 400 with air to test the airtightness of the test piece 500.
[0051] This application also provides an airtightness testing fixture, including the airtightness testing sealing structure described in the above embodiments.
[0052] It should be noted that the airtightness testing fixture includes the airtightness testing sealing structure, and thus includes all the advantages of the airtightness testing sealing structure mentioned above, which will not be repeated here.
[0053] This application also provides an airtightness testing device, including the airtightness testing fixture described in the above embodiments.
[0054] It should be noted that the airtightness testing device includes the airtightness testing fixture, and thus includes all the advantages of the airtightness testing fixture mentioned above, which will not be repeated here.
[0055] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0058] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0059] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A sealing structure for airtightness testing, characterized in that, include: An auxiliary component is disposed on one side of the test piece. The auxiliary component abuts against the outer wall of the test piece, so that the auxiliary component and the test piece together enclose a test cavity. The first sealing strip is disposed on the outer wall of the test piece and is used to seal the joint between the auxiliary component and the outer wall of the test piece; The second sealing strip is disposed at the corner of the test piece and is used to seal the joint between the auxiliary component and the corner of the test piece; The first sealing strip and the second sealing strip together seal the test chamber.
2. The airtightness testing sealing structure according to claim 1, characterized in that: The second sealing strip has an arc-shaped groove on one side near the test piece, and the inner wall of the arc-shaped groove is used to abut against the corner of the test piece.
3. The airtightness testing sealing structure according to claim 1, characterized in that: The two ends of the second sealing strip abut against the corresponding ends of the first sealing strip.
4. The airtightness testing sealing structure according to claim 3, characterized in that: The second sealing strip has beveled surfaces at both ends, which abut against the end face of the first sealing strip.
5. The airtightness testing sealing structure according to any one of claims 1-4, characterized in that: It also includes a filler material disposed in the test cavity to fill a portion of the test cavity.
6. The airtightness testing sealing structure according to claim 5, characterized in that: The filler is a nylon conformal material.
7. The airtightness testing sealing structure according to claim 1, characterized in that, The auxiliary components include: Base plate; The first side plate is connected to one side of the base plate; The second side plate is connected to the other side of the base plate and is disposed opposite to the first side plate; The first end plate is connected to one end of the base plate; The second end plate is connected to the other end of the base plate and is disposed opposite to the first end plate. The first side plate, the second side plate, the first end plate, and the second end plate abut against the outer wall of the test piece to form the test cavity.
8. The airtightness testing sealing structure according to claim 7, characterized in that: It also includes an auxiliary sealing strip, which is disposed at the joint of any two of the base plate, the first side plate, the second side plate, the first end plate and the second end plate.
9. An airtightness testing fixture, characterized in that: Includes the airtightness testing sealing structure as described in any one of claims 1-8.
10. An airtightness testing device, characterized in that: Includes the airtightness testing fixture as described in claim 9.