Tool clamp for testing welding seam strength of lithium battery cover plate

Abstract

The utility model discloses a tool clamp for testing the welding seam strength of a lithium battery cover plate, which relates to the technical field of welding seam strength testing and comprises an adjustable clamping component, a clamping component and a clamping component, the supporting base assembly is fixed on the testing platform and prevents the testing cover plate from deforming or loosening in the stress process by limiting the relative movement of the adjustable clamping assembly; the supporting part is used for fixing the relative position of the adjustable clamping assembly and the supporting base assembly and providing position adjustment in the clamping process so as to adapt to test cover plates of different sizes or shapes; according to the utility model, through the cooperation of the adjustable clamping assembly and the supporting base assembly, the adaptation and fixation of different types of test cover plates are realized, so as to meet the mechanical performance test requirements under different test conditions. In the operation process, the clamping operation is simplified, and the test result is more accurate and reliable due to uniform clamping and stable supporting.

Description

Technical Field

[0001] This utility model relates to the field of weld strength testing technology, and specifically to a tooling fixture for testing the weld strength of a lithium battery cover plate. Background Technology

[0002] As the application fields of lithium batteries continue to expand, the requirements for their safety and durability are also gradually increasing, especially in fields such as electric vehicles and portable electronic devices, where stringent requirements are placed on the weld strength testing of lithium battery cover plates. The strength of the lithium battery cover plate weld directly affects the battery's sealing performance and operational safety; therefore, reliable tensile testing of the cover plate weld is particularly important. Specialized fixtures are required for this type of testing to ensure stability and accuracy during the testing process.

[0003] Currently, the fixtures used for testing the weld strength of lithium battery cover plates on the market are relatively simple in design, typically only offering two basic clamping methods: top-and-bottom clamping or left-and-right clamping. This single structural design is insufficient to meet the weld strength testing requirements of different cover plates, especially for cover plate samples of varying thicknesses and shapes. Existing fixtures have many shortcomings in terms of adaptability and stability. Specifically, existing technologies have the following defects and deficiencies: 1. Due to differences in the material, thickness, and structure of cover plates, existing fixture designs are difficult to adapt to various types of cover plate samples. The single clamping method and size limitations mean that the fixture can only fix specific types of cover plate samples. For cover plates of different specifications, fixtures need to be redesigned and customized, which not only increases experimental costs but also reduces testing efficiency. 2. Existing fixtures tend to exert uneven pressure on the cover plate during clamping, especially in high-strength tensile tests. The fixture structure lacks effective support for the weld area of ​​the cover plate, which may cause deformation of the test cover plate, thus affecting the accuracy of the test results. Due to the sensitivity of the cover plate weld, this uneven clamping method cannot provide consistent testing conditions. 3. Existing fixtures lack flexible adjustment capabilities for clamping positions. Once clamped, it is difficult to effectively adjust the clamping force and position, which is particularly inconvenient during experiments. When experimental requirements change or the size of the test sample differs, traditional fixtures cannot be quickly adjusted to adapt to the new testing requirements. 4. In high-strength tensile tests, the base or support components of traditional fixtures are not stable enough, especially during stress, and are prone to relative slippage. This fails to effectively restrict the movement of the clamping components, leading to loosening of the test object under stress and affecting the reliability of the test data.

[0004] To address the aforementioned issues, some existing technologies attempt to adjust the clamping effect using devices such as cylinders and hooks. For example, CN218629290U discloses a lithium battery cover tensile testing device. This device uses telescopic cylinders on both sides to push the clamping plates left and right to adjust the clamping plate spacing. While this technology can achieve a certain degree of adjustment, its clamping method is limited to lateral clamping and provides insufficient stable support for the cover, making it difficult to effectively solve the problems of cover deformation and testing errors. Furthermore, the device is relatively complex and difficult to operate, affecting the actual testing efficiency.

[0005] In summary, existing tooling fixtures for testing lithium battery cover plates have the following shortcomings: 1. Insufficient adaptability, making it difficult to meet the diverse testing needs of cover plates; 2. Single and uneven clamping methods, easily causing deformation of the test object; 3. Lack of flexible adjustment capabilities, inconvenient operation, and difficulty in quickly adapting to different experimental requirements; 4. Instable structure, leading to easy loosening of clamping components during testing, affecting testing accuracy. Therefore, there is an urgent need for those skilled in the art to design a new type of tooling fixture for testing battery cover plates. Utility Model Content

[0006] The problem this invention aims to solve is that existing tooling fixtures for testing lithium battery cover plates suffer from insufficient adaptability, single and uneven clamping methods, lack of flexible adjustment capabilities, and unstable structures that affect testing accuracy. The invention provides a tooling fixture for testing the weld strength of lithium battery cover plates that enhances the adaptability of the fixture, improves the uniformity and stability of clamping, ensures the impact resistance of the fixture under high-intensity testing, and makes the entire operation process more convenient and efficient, significantly improving the accuracy and efficiency of lithium battery cover plate weld strength testing.

[0007] To address the aforementioned problems, this utility model provides a fixture for testing the weld strength of a lithium battery cover plate. The fixture is mounted on the worktable of a tensile testing machine and includes:

[0008] An adjustable clamping assembly is used to hold the test cover plate and keep it stable during testing;

[0009] The support base assembly is fixed to the test platform and prevents the test cover from deforming or loosening during the stress process by limiting the relative movement of the adjustable clamping assembly;

[0010] Support components are used to fix the relative position of the adjustable clamping assembly and the support base assembly, and to provide position adjustment during clamping to accommodate test covers of different sizes or shapes;

[0011] The tooling fixture, through the cooperation of the adjustable clamping assembly and the support base assembly, enables the adaptation and fixation of different types of test covers to meet the mechanical performance testing requirements under different testing conditions.

[0012] Preferably, the adjustable clamping assembly includes an upper cover plate and a lower clamping plate, which can be adjusted by tightening the handle so that the distance between the upper cover plate and the lower clamping plate can be flexibly adjusted according to the thickness of the test cover plate. This allows the fixture to flexibly adapt to cover plate samples of different thicknesses, improving adaptability. This not only improves testing efficiency but also significantly reduces testing costs, making it suitable for the strength testing needs of diverse cover plates.

[0013] Preferably, the tightening handle passes through the opening in the upper cover plate and is screwed downwards into the threaded hole in the lower clamping plate, thereby fitting and clamping the upper cover plate and the lower clamping plate together. By tightening the handle through the opening in the upper cover plate and screwing it into the threaded hole in the lower clamping plate, a stable clamping of the upper cover plate and the lower clamping plate is achieved. The upper and lower clamping plates can be firmly clamped through a simple tightening operation, which is not only convenient and quick to operate, but also ensures the stability of the clamping, effectively avoiding the problem of the cover plate loosening during the test, and ensuring the stability and reliability of the test results.

[0014] Preferably, the support base assembly includes a base connecting plate and a support block disposed on the upper end of the base connecting plate. The combination of the base connecting plate and the support block makes the fixture more stable under stress, providing solid support for the entire fixture and greatly improving the stability of the fixture during the testing process. This avoids the slippage or shaking caused by the instability of the base in traditional fixtures, and effectively improves the accuracy of the test data.

[0015] Preferably, the support component includes a set of bolts and set screws. The bolts pass through the connecting holes in the upper cover plate, support block, and base connecting plate in sequence, thereby fixing them together as a whole. The bolts make the entire fixture structure more stable, ensuring that the clamping components do not loosen during testing. The reliable fixing of the support component provides a solid foundation for high-strength testing, avoids testing errors caused by loosening, and also extends the service life of the fixture.

[0016] Preferably, the lower clamping plate side end is connected to the support block to form a fitting structure. The fitting structure makes the clamp more stable during the force process, avoids relative displacement under lateral force, and thus ensures the accuracy and consistency of the test, which is particularly suitable for the needs of high-strength tensile testing.

[0017] Preferably, a dovetail groove is formed at the side edge of the lower clamping plate, and a dovetail-shaped locking block protruding outward is provided at the side end of the support block. The dovetail-shaped locking block is fitted into the dovetail groove, and the set screw is tightened into the clamping hole at the front end of the lower clamping plate. The fit of the dovetail structure greatly enhances the connection strength between the lower clamping plate and the support block, making the fixture less prone to slippage or misalignment during high-strength tensile testing. This effectively enhances the impact resistance and overall rigidity of the fixture, ensuring the stability of the test cover plate under high-strength loads, thereby improving the reliability of the test results.

[0018] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0019] This utility model's tooling fixture uses an adjustable clamping assembly. By adjusting the distance between the clamping plates, the fixture can adapt to lithium battery cover plates of different thicknesses and sizes. This solves the problem of insufficient adaptability of existing fixtures, enabling it to accommodate cover plates of different materials and specifications, reducing the need for customized fixtures of different specifications, improving testing efficiency, and reducing experimental costs.

[0020] This invention achieves uniform clamping of the cover plate through the upper cover plate and the lower clamping plate, and the support base assembly provides effective support for the weld area, avoiding the deformation problem that occurs in traditional fixtures during high-strength tensile testing, improving the accuracy and reliability of the test, especially in high-strength testing, it can provide consistent test conditions and ensure the accuracy of measurement data.

[0021] The clamping assembly and support components of this invention can be flexibly adjusted according to the size and shape of the test sample, allowing experimenters to quickly adapt to different experimental needs. By tightening the handle and support components, users can easily adjust the clamping force and position during the experiment, improving operational convenience and enabling the fixture to quickly respond to different experimental requirements.

[0022] The support base assembly of this utility model adopts a combination of a base connecting plate and a support block, providing stable support and preventing slippage of the fixture during high-strength tensile testing. The interlocking structure formed between the lower clamping plate and the support block, along with the cooperation of the dovetail groove and dovetail-shaped locking block, further enhances the stability of the fixture, effectively preventing the test object from loosening during stress and ensuring the stability and reliability of the test data.

[0023] The tooling fixture of this invention has a simple structure, and clamping adjustment can be quickly completed by tightening the handle. Compared with the complex operation of cylinders and hooks in the prior art, it significantly reduces the difficulty of operation. At the same time, the tooling fixture is easy to install and can be quickly fixed to the worktable of the tensile testing machine, improving testing efficiency and making it suitable for batch testing applications. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the tooling fixture for testing the weld strength of the lithium battery cover plate according to this utility model.

[0025] Figure 2 This is a schematic diagram of the tooling fixture for testing the weld strength of the lithium battery cover plate according to this utility model.

[0026] Figure 3 This is a schematic diagram of the support block.

[0027] In the diagram: 1-Test cover plate, 2-Adjustable clamping assembly, 201-Upper cover plate, 202-Lower clamping plate, 203-Tightening handle, 204-Dovetail groove, 3-Support base assembly, 301-Base connecting plate, 302-Support block, 303-Dovetail-shaped locking block, 4-Support component, 401-Bolt fastener, 402-Set screw component. Detailed Implementation

[0028] The present invention will be further explained below with reference to the accompanying drawings and embodiments.

[0029] Reference Figures 1-3 As shown, a fixture for testing the weld strength of a lithium battery cover plate is mounted on the worktable of a tensile testing machine. The fixture includes: an adjustable clamping assembly 2 for clamping the test cover plate 1 and keeping it stable during testing; a support base assembly 3 fixed to the testing platform and preventing deformation or loosening of the test cover plate 1 under stress by limiting the relative movement of the adjustable clamping assembly 2; and a support component 4 for fixing the relative position of the adjustable clamping assembly 2 and the support base assembly 3, and providing position adjustment during clamping to adapt to test covers of different sizes or shapes. The fixture, through the cooperation of the adjustable clamping assembly 2 and the support base assembly 3, adapts and fixes different types of test covers 1 to meet the mechanical performance testing requirements under different testing conditions.

[0030] Reference Figures 1-2 As shown, the adjustable clamping assembly 2 includes an upper cover plate 201 and a lower clamping plate 202. The distance between the upper cover plate and the lower clamping plate can be flexibly adjusted according to the thickness of the test cover plate by tightening the handle. This allows the fixture to flexibly adapt to cover plate samples of different thicknesses, improving adaptability. This not only improves testing efficiency but also significantly reduces testing costs, making it suitable for the strength testing needs of diverse cover plates.

[0031] The handle 203 is screwed through the opening in the upper cover plate 201 and threaded downwards into the threaded hole in the lower clamping plate 202, thereby fitting and clamping the upper cover plate 201 and the lower clamping plate 202 together. By screwing the handle through the opening in the upper cover plate and threading it into the threaded hole in the lower clamping plate, a stable clamping of the upper cover plate and the lower clamping plate is achieved. The upper and lower clamping plates can be firmly clamped through a simple tightening operation. This not only makes the operation convenient and quick, but also ensures the stability of the clamping, effectively avoiding the problem of the cover plate loosening during the test, and ensuring the stability and reliability of the test results.

[0032] The support base assembly 3 includes a base connecting plate 301 and a support block 302 disposed on the upper end of the base connecting plate 301. The combination of the base connecting plate and the support block makes the fixture more stable under stress, providing solid support for the entire fixture and greatly improving the stability of the fixture during the testing process. This avoids the slippage or shaking caused by the instability of the base in traditional fixtures, and effectively improves the accuracy of the test data.

[0033] The support component 4 includes a set of bolts 401 and set screws 402. The bolts 401 pass through the connecting holes on the upper cover plate 201, the support block 302, and the base connecting plate 301 in sequence, thereby fixing them together as a whole. The bolts 401 make the entire fixture structure more stable, ensuring that the clamping components do not loosen during the test. The reliable fixing of the support component provides a solid foundation for high-strength testing, avoids test errors caused by loosening, and also extends the service life of the fixture.

[0034] The lower clamping plate 202 is connected to the support block 302 to form a fitting structure. The fitting structure makes the fixture more stable during the force process and avoids relative displacement when subjected to lateral force, thereby ensuring the accuracy and consistency of the test, which is particularly suitable for the needs of high-strength tensile testing.

[0035] A dovetail groove 204 is provided at the side edge of the lower clamping plate 202, and a dovetail-shaped locking block 303 protruding outward is provided at the side end of the support block 302. The dovetail-shaped locking block 303 is fitted into the dovetail groove 204, and the set screw 402 is tightened into the clamping hole at the front end of the lower clamping plate 202. The fit of the dovetail structure greatly enhances the connection strength between the lower clamping plate and the support block, making the fixture less prone to slippage or misalignment during high-strength tensile testing. This effectively enhances the impact resistance and overall rigidity of the fixture, ensuring the stability of the test cover plate under high-strength loads, thereby improving the reliability of the test results.

[0036] To facilitate understanding of the above technical solutions of this utility model, the following detailed description of the above technical solutions of this utility model is provided through specific usage methods.

[0037] The specific working process is as follows: First, the support base assembly 3 of the tooling fixture is fixed on the worktable of the tensile testing machine, ensuring that the base connecting plate 301 is firmly connected to the worktable to prevent the fixture from shifting or loosening during the test. Next, the lithium battery cover plate 1 to be tested is placed in the adjustable clamping assembly 2, positioning it between the upper cover plate 201 and the lower clamping plate 202. According to the size and thickness of the cover plate 1 to be tested, the distance between the upper cover plate 201 and the lower clamping plate 202 of the adjustable clamping assembly 2 is adjusted. By tightening the handle 203, it can be screwed into the threaded hole of the lower clamping plate 202, thereby adjusting the upper cover plate 201 and the lower clamping plate 202 to a suitable distance according to the thickness of the cover plate 1 to be tested, so as to accommodate cover plates of different thicknesses. During the clamping process, the clamping force is adjusted by tightening the handle 203 to ensure uniform clamping and prevent loosening during the test. Next, ensure that the dovetail grooves 204 on the sides of the lower clamping plate 202 and the support block 302 are properly engaged with the dovetail-shaped locking block 303. This engagement structure effectively prevents slippage or misalignment of the fixture during high-strength tensile testing. Tighten the clamping hole at the front end of the lower clamping plate using the set screw 402. After the test cover plate 1 is clamped and secured, start the tensile testing machine and gradually increase the tensile force to test the strength of the weld area of ​​the cover plate. During the tensile test, record the specific values ​​of the weld strength of the cover plate using the testing machine and observe whether the cover plate deforms or falls off during the stress process. The stable design and effective support of this fixture ensure the reliability of the weld area during the test. After the test, loosen the tightening handle 203 to increase the distance between the upper cover plate 201 and the lower clamping plate 202, allowing the cover plate to be removed from the fixture. Adjust the fixture to accommodate new test cover plate specifications as needed for the next test, or store the fixture properly after completing batch testing.

[0038] This utility model discloses a lithium battery cover weld strength testing fixture. Through the coordinated operation of the adjustable clamping assembly and the support base assembly, it can accommodate cover samples of various specifications. During operation, it not only simplifies the clamping process but also, due to uniform clamping and stable support, provides more accurate and reliable test results, making it suitable for batch testing.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0040] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A fixture for testing the weld strength of a lithium battery cover plate, wherein the fixture is mounted on the worktable of a tensile testing machine, characterized in that, The tooling fixture includes: An adjustable clamping assembly (2) is used to clamp the test cover plate (1) and keep it stable during the test; The support base assembly (3) is fixed to the test platform and the relative movement of the adjustable clamping assembly (2) is restricted to prevent the test cover plate (1) from deforming or loosening during the stress process; Support component (4) is used to fix the relative position of the adjustable clamping assembly (2) and the support base assembly (3) and to provide position adjustment during clamping to accommodate test covers of different sizes or shapes; The tooling fixture, through the cooperation of the adjustable clamping assembly (2) and the support base assembly (3), can adapt and fix different types of test covers (1).

2. The tooling fixture for testing the weld strength of a lithium battery cover plate according to claim 1, characterized in that, The adjustable clamping assembly (2) includes an upper cover plate (201) and a lower clamping plate (202). The upper cover plate (201) is adjusted by tightening the handle (203) so that the distance between the upper cover plate (201) and the lower clamping plate (202) can be adjusted according to the thickness of the test cover plate (1).

3. The tooling fixture for testing the weld strength of a lithium battery cover plate according to claim 2, characterized in that, The tightening handle (203) passes through the opening in the upper cover plate (201) and is screwed downwards into the threaded hole in the lower clamping plate (202), thereby fitting and clamping the upper cover plate (201) and the lower clamping plate (202).

4. The tooling fixture for testing the weld strength of a lithium battery cover plate according to claim 2, characterized in that, The support base assembly (3) includes a base connecting plate (301) and a support block (302) disposed on the upper end of the base connecting plate (301).

5. The tooling fixture for testing the weld strength of a lithium battery cover plate according to claim 4, characterized in that, The support component (4) includes a set of bolt fasteners (401) and set screws (402). The bolt fasteners (401) pass through the connecting holes on the upper cover plate (201), the support block (302) and the base connecting plate (301) in sequence to fix the upper cover plate (201) to the support block (302) and the base connecting plate (301).

6. The tooling fixture for testing the weld strength of a lithium battery cover plate according to claim 5, characterized in that, The lower clamping plate (202) is connected to the support block (302) to form a fitting structure.

7. The tooling fixture for testing the weld strength of a lithium battery cover plate according to claim 6, characterized in that, The lower clamping plate (202) has a dovetail groove (204) at its side edge, and the support block (302) has a dovetail-shaped locking block (303) that protrudes outward at its side end. The dovetail-shaped locking block (303) is fitted and connected to the dovetail groove (204), and the set screw (402) is tightened into the clamping hole at the front end of the lower clamping plate (202).

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