Sealing structure and pressing tester
By using the sealing structure of pins and soft seals in battery explosion testing, the problems of complex processes and inaccurate detection in the prior art are solved, and more efficient and accurate detection results are achieved.
Patent Information
- Application Number
- CN202420748462.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-09
AI Technical Summary
In the prior art, complex processes such as cutting, grinding, poking, hole reaming and compression are required before battery blasting testing, resulting in inaccurate detection, high repeatability and poor sealing effect, increasing the workload and detection time.
A sealing structure is adopted, including a pin and a seal made of soft material. The pin passes through the liquid injection port of the battery case through the liquid injection port, so that the seal and the liquid injection port are sealed, and the air pressure is used to make the sealing member and the liquid injection port closely fit to achieve the sealing effect.
The process of blasting stress testing is simplified, the impact of human factors on detection is reduced, the accuracy and efficiency of detection is improved, and the detection failure rate is reduced.
Smart Images
Figure CN222601331U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery explosion testing, in particular to a sealing structure and a pressure testing instrument. Background Art
[0002] After the battery is assembled, a burst test is required. During the burst test, the pressure tester is started to perform the burst test. The value displayed on the tester after the burst stops, or the maximum burst value is the burst pressure test result.
[0003] In the prior art, the welded battery shell needs to be cut, ground and polished before the blasting test, and then the cut shell mouth is blasted with a blasting tool, and then the blasting position is flattened with a riveting machine, and the shell is placed in a well-designed blasting tool and the blasting position is pressed with a pressure cylinder to achieve the effect of sealing the shell mouth blasting position, and then the pressure test can be performed. During the blasting operation, the shell is placed on the blasting tool, and pressure is applied to the end cover with a riveting machine. During the blasting process, as the pressure increases, the blasting position is deformed to achieve the blasting effect.
[0004] However, in the prior art, since the expansion tooling and the shell shell opening are not designed with limit matching for the size of the pressure expansion hole, and the expansion effect of the shell opening expansion position is mainly judged by manual visual inspection, when the riveting machine applies pressure, manual visual inspection cannot determine whether the shell opening has reached the expansion effect range, which can easily cause the shell hole to be expanded too small. When the shell with an undersized expansion hole is placed in a well-designed blasting tooling for blasting test, the shell expansion position is deformed into a circle under the action of air pressure during the pressurization process, resulting in inaccurate or invalid detection results, and re-cutting, grinding and polishing are required before blasting, which increases the repeatability of the work and reduces the detection efficiency; in addition, the expansion operation can easily cause deformation and cracking of the shell. During the blasting test, the cracked part has the risk of poor sealing and leakage, resulting in a high detection failure rate. Utility Model Content
[0005] In order to solve at least the above technical problems existing in the prior art, the embodiments of the present utility model provide a sealing structure and a pressure tester.
[0006] One aspect of an embodiment of the utility model provides a sealing structure for sealing the liquid filling port of a battery, comprising a pin and a sealing member made of a soft material; the sealing member comprises a through hole, one end of the pin passes through the through hole, and the sealing member is fixedly connected to the outer wall of the pin; the sealing member comprises an abutting side, the abutting side comprises a fitting plane with a set area, the pin is used to drive the sealing member to pass through the liquid filling port, and the fitting plane of the abutting side fits with the inner side of the liquid filling port so that the sealing member is sealed with the liquid filling port.
[0007] In some embodiments, the seal includes a guide surface, and the seal is guided through the liquid injection port via the guide surface.
[0008] In some embodiments, the outer diameter of the seal gradually decreases in the direction away from the fitting plane, so that a conical guide surface is formed on the side of the seal away from the fitting plane; the seal is guided through the injection port via the conical guide surface.
[0009] In some embodiments, a deformation cavity is provided in the sealing member; when the sealing member passes through the liquid injection port, the deformation cavity is squeezed by the liquid injection port to produce deformation, and after the sealing member passes through the liquid injection port, the deformation cavity and the sealing member are reset.
[0010] In some embodiments, the deformation cavity is annular and is arranged along the circumference of the through hole.
[0011] On the other hand, the utility model further provides a pressure tester, comprising the above-mentioned sealing structure.
[0012] In some embodiments, a clamping structure is also included, and the clamping structure is used to clamp and fix the battery.
[0013] In some embodiments, the clamping structure includes a base, the base is provided with a contoured groove having the same shape as the battery contour, and a side end of the contoured groove is provided with a space for the insertion pin to pass through.
[0014] In some embodiments, the clamping structure further includes a clamping claw, the clamping claw is disposed at a notch of the contoured groove, and the clamping claw and the contoured groove form the clamping structure surrounding the battery.
[0015] In some embodiments, a pick-up and release groove is provided in the profiling groove at the front end and / or the rear end of the profiling groove, and the pick-up and release groove is arranged along the circumference of the profiling groove.
[0016] The sealing structure and pressure tester provided by the embodiment of the utility model, when in use, the pin with the sealing part is inserted into the shell through the liquid injection port of the battery shell, the sealing part and the liquid injection port are sealed, and after sealing, the pressure tester starts to pressurize and perform a burst pressure test. As the air pressure inside the shell continues to increase, the sealing part and the internal liquid injection hole are tightly fitted to achieve a sealing effect. The technical solution of the utility model, the sealing structure combining the needle extraction and the sealing part, can simplify the process of the pressure burst test, that is, it eliminates the processes of cutting, grinding, reaming, pressing, etc., reduces the influence of human factors on the detection, and makes the detection more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By reading the detailed description below with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, wherein:
[0018] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.
[0019] Figure 1 It is a structural schematic diagram of a sealing structure provided by an embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional view of the sealing structure provided by the embodiment of the utility model in the use state;
[0021] Figure 3 It is a structural schematic diagram of a pressure tester provided by an embodiment of the utility model;
[0022] Figure 4 It is a structural schematic diagram of a clamping structure in a pressure tester provided in an embodiment of the utility model.
[0023] In the figure:
[0024] 10: sealing structure; 20: battery; 30: clamping structure; 40: gas generating device;
[0025] 11: pin; 12: sealing member; 121: abutting side; 122: guide surface; 123: deformation cavity;
[0026] 21: Liquid injection port;
[0027] 31: base; 32: contoured groove; 33: penetration space; 34: clamping claw; 35: pick-and-place groove. DETAILED DESCRIPTION
[0028] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0029] The embodiment of the utility model provides a sealing structure for sealing the liquid filling port of a battery, comprising an insertion pin and a sealing member made of a soft material; the insertion pin is a hollow structure, and is used to be connected to a pressure device, and the pressure device inflates the interior of the battery through the insertion pin; the sealing member is used to seal the liquid filling port, and after the sealing member is inserted into the battery shell along with the insertion pin, the liquid filling port is sealed.
[0030] The following is a detailed description of the sealing structure and various structures of the pressure tester provided in the embodiment of the utility model, as well as the positional relationship and connection relationship between the various structures, in conjunction with the accompanying drawings.
[0031] like Figures 1 to 3 As shown, the seal 12 includes a perforation, one end of the pin 11 passes through the perforation, and the seal 12 is fixedly connected to the outer wall of the pin 11; the seal 12 is connected to the pin 11 through the perforation, for example, the aperture of the seal 12 perforation is slightly smaller than the diameter of the pin 11, and the two can fit tightly after being sleeved, or, for example, an auxiliary connection device such as an adhesive layer is provided between the seal 12 and the pin 11. When the pin 11, i.e., the seal 12, is used together, it needs to be telescopically operated in the axial direction, so the seal 12 and the pin 11 need to be firmly connected to avoid relative movement.
[0032] The sealing member 12 includes an abutting side 121, which includes a fitting plane with a set area. The insertion pin 11 is used to drive the sealing member 12 to pass through the liquid injection port 21, and the fitting plane of the abutting side 121 fits with the inner side of the liquid injection port 21 to seal the sealing member 12 with the liquid injection port 21. When the abutting side 121 is not under pressure, it has a certain area when it is expanded, and this part is used to fit with the shell around the liquid injection port 21.
[0033] For example, the seal 12 is made of rubber, which will deform after being squeezed by external force. When the external force disappears, the rubber has a certain resilience. Under the action of the resilience, the seal 12 returns to its original shape, thereby making the fitting plane fit with the shell around the liquid injection port 21. In the embodiment of the utility model, when the shell is not filled with sufficient gas, the seal 12 and the shell around the liquid injection port 21 are not tightly fitted. When the pressure inside the shell is continuously increased, the internal pressure squeezes the seal 12, so that the seal 12 and the shell around the liquid injection port 21 are tightly fitted, thereby achieving a sealing effect.
[0034] In the embodiment of the utility model, the seal 12 includes a guide surface 122, and the seal 12 is guided through the liquid injection port 21 via the guide surface 122. Under the action of the guide surface 122, the seal 12 is more easily inserted into and passes through the liquid injection port 21, ensuring that the seal 12 can pass through the liquid injection port 21 smoothly, and reducing the external force required for the seal 12 to pass through.
[0035] For example, the outer diameter of the seal 12 gradually decreases in the direction away from the fitting plane, so that a tapered guide surface 122 is formed on the side of the seal 12 away from the fitting plane; the seal 12 is guided to pass through the injection port 21 via the tapered guide surface 122. During the operation of passing through the injection port 21, one end of the seal 12 first contacts the injection port 21, and the outer diameter of the one end is set to be relatively small, thereby facilitating the seal 12 to pass through the injection port 21, for example, the outer diameter of the one end is set to be smaller than the diameter of the injection port 21.
[0036] In the embodiment of the utility model, a deformation cavity 123 is provided in the sealing member 12; when the sealing member 12 passes through the liquid injection port 21, the deformation cavity 123 is squeezed by the liquid injection port 21 to produce deformation, and after the sealing member 12 passes through the liquid injection port 21, the deformation cavity 123 and the sealing member 12 are reset. By providing the deformation cavity 123, the sealing member 12 is facilitated to shrink when deformed and can shrink to a smaller volume.
[0037] For example, the deformation cavity 123 is annular and arranged along the circumference of the perforation. In the middle of the seal 12, an annular deformation cavity 123 is arranged, and an air port is arranged on the deformation cavity 123. When subjected to external force, the seal 12 has little effect on the deformation cavity 123 and can shrink regularly and quickly.
[0038] like Figure 4 As shown, the embodiment of the utility model provides a pressure tester, including a gas generating device 40 and the above-mentioned sealing structure 10. The gas outlet of the gas generating device 40 is connected to the end of the plug pin 11 away from the sealing member 12. After the sealing member 12 is connected to the liquid injection port 21 of the battery 20, the gas generating device 40 is started to fill the gas into the shell of the battery 20 through the plug pin 11.
[0039] As the gas inside the battery 20 shell increases, the internal pressure increases. Under the action of air pressure, the seal 12 presses the shell around the injection port 21, thereby achieving the sealing of the injection port 21. During the entire test process, good sealing can be achieved at the injection port 21, which is beneficial to the accuracy of the test results.
[0040] In the embodiment of the utility model, the pressure tester further includes a clamping structure 30, which is used to clamp and fix the battery 20. During the test, the battery 20 is fixed on the clamping structure 30 so that the battery 20 cannot move relative to the clamping structure 30, and then the insertion operation of the pin 11 is performed. This method makes the connection operation and the pressure operation of the pin 11 simpler and faster, simplifies the detection process, and improves the detection efficiency.
[0041] For example, the clamping structure 30 includes a base 31, on which a profiling groove 32 having the same contour shape as the battery 20 is provided, and a space 33 for the insertion pin 11 is provided at the side end of the profiling groove 32. The groove on the base 31 is the profiling groove 32, and the contour shape of the square groove is the same as or similar to the shape of the battery 20. After the battery 20 is placed in the square groove, the two have a more stable fit, avoiding / reducing the shaking of the battery 20 in the profiling groove 32. For example, the space 33 for the insertion pin 11 is a jack or a slot; for example, a pick-up and placement groove 35 is provided at the front end and / or rear end of the profiling groove 32 in the profiling groove 32, and the pick-up and placement groove 35 is arranged along the circumference of the profiling groove 32. The pick-up and placement groove 35 forms a deeper groove structure on the inner wall of the profiling groove 32. After the battery 20 is placed in the profiling groove 32, the front end and / or rear end of the battery 20 is suspended on the pick-up and placement groove 35, which facilitates the pick-up and placement operation of the battery 20.
[0042] For example, the clamping structure 30 further includes a clamping claw 34, which is disposed at the notch of the profiling groove 32. The clamping claw 34 and the profiling groove 32 form a clamping structure 30 that surrounds the battery 20. One end of the clamping claw 34 is rotatably connected to the notch of the profiling groove 32, and the other end is detachably connected to the square groove, such as by clamping or screw fastening. The inner wall of the clamping claw 34 has the same contour shape as the battery 20 shell, and cooperates with the profiling groove 32 to limit the battery 20.
[0043] The sealing structure 10 and the pressure tester provided by the embodiment of the utility model, when in use, the insertion pin 11 with the sealing member 12 is inserted into the interior of the battery 20 shell through the liquid injection port 21, and the sealing member 12 is sealed with the liquid injection port 21. After sealing, the pressure tester starts to perform pressure testing to perform a bursting pressure test. As the air pressure inside the shell continues to increase, the sealing member 12 is tightly fitted with the internal liquid injection hole to achieve a sealing effect. The technical solution of the utility model, the sealing structure 10 combining the extraction needle and the sealing member 12, can simplify the process of the pressure burst test, that is, it eliminates the processes of cutting, grinding, reaming, pressing, etc., reduces the influence of human factors on the detection, and makes the detection more accurate.
[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.
[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0046] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. A sealing structure for sealing a liquid injection port (21) of a battery (20), characterized in that: It comprises an insertion pin (11) and a sealing member (12) made of a soft material; The sealing member (12) comprises a through hole, one end of the insertion pin (11) passes through the through hole, and the sealing member (12) is fixedly connected to the outer wall of the insertion pin (11); The sealing member (12) comprises an abutting side (121), the abutting side (121) comprises a fitting plane having a set area, the insertion pin (11) is used to drive the sealing member (12) to pass through the liquid injection port (21), the fitting plane of the abutting side (121) fits with the inner side of the liquid injection port (21), so that the sealing member (12) and the liquid injection port (21) are sealed.
2. The sealing structure according to claim 1, characterized in that: The sealing member (12) comprises a guide surface (122), and the sealing member (12) is guided through the liquid injection port (21) via the guide surface (122).
3. The sealing structure according to claim 2, characterized in that: The outer diameter of the sealing member (12) gradually decreases in a direction away from the fitting plane, so that a conical guide surface (122) is formed on the side of the sealing member (12) away from the fitting plane; The sealing member (12) is guided through the liquid injection port (21) via the conical guide surface (122).
4. The sealing structure according to claim 3, characterized in that: The sealing element (12) is provided with a deformation cavity (123); When the sealing member (12) passes through the liquid injection port (21), the deformable cavity (123) is squeezed by the liquid injection port (21) to generate deformation; after the sealing member (12) passes through the liquid injection port (21), the deformable cavity (123) and the sealing member (12) are reset.
5. The sealing structure according to claim 4, characterized in that: The deformation cavity (123) is annular and is arranged along the circumference of the through hole.
6. A pressure tester, characterized in that: It comprises the sealing structure (10) according to any one of claims 1 to 5.
7. The pressure tester according to claim 6, characterized in that: It also includes a clamping structure (30), wherein the clamping structure (30) is used to clamp and fix the battery (20).
8. The pressure tester according to claim 7, characterized in that: The clamping structure (30) comprises a base (31), the base (31) being provided with a contour groove (32) having the same contour shape as the battery (20), and a space (33) for the insertion pin (11) being provided at a side end of the contour groove (32).
9. The pressure tester according to claim 8, characterized in that: The clamping structure (30) further comprises a clamping claw (34), wherein the clamping claw (34) is arranged at the notch of the contoured groove (32), and the clamping claw (34) and the contoured groove (32) form the clamping structure (30) surrounding the battery (20).
10. The pressure tester according to claim 9, characterized in that: A pick-up and placement groove (35) is provided in the profiling groove (32) at the front end and / or the rear end of the profiling groove (32), and the pick-up and placement groove (35) is arranged along the circumference of the profiling groove (32).