Clamp for tension test
By designing a simple structure and convenient operation of tensile test fixture, the problem of complex and inconvenience of existing clamps is solved, and the effective judgment and reliable test results of the intensity of welding set flow disk are realized.
Patent Information
- Application Number
- CN202420680841.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-02
AI Technical Summary
The existing fixtures used for tensile testing of the negative electrode current collecting disk after welding are complex structures and inconvenient to operate, making it difficult to effectively judge the welding strength.
Design a tensile test fixture, including the hook, the body of the fixture and the ring, the hook is separated along the ring -shaped body, the hook head hooks the stream disk, the fixture main body is equipped with the tensile machine, and the tensile machine is applied by the tensile machine. Terraper to test the welding strength.
The fixture structure is simple and convenient to operate, ensuring the uniformity of the tensile applied, improves the reliability of the test result, and can effectively determine the intensity of the set flow disk after welding.
Smart Images
Figure CN222393887U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a clamp used in a secondary battery (such as a lithium battery), in particular to a clamp used for a tension test which is used to perform a tension test on a welded current collecting plate to judge the welding strength. Background Art
[0002] With the vigorous development of the new energy industry, a huge market is provided for the battery industry, thereby accelerating the pace of development of the battery industry.
[0003] At present, lithium-ion cylindrical batteries have gradually become the mainstream products in the new energy industry due to their advantages such as high energy density, high charge and discharge rate, and good capacity consistency.
[0004] Among them, in lithium-ion cylindrical batteries, the full collector ear / collector plate structure has been determined by more and more manufacturers as the preferred direction of cylindrical battery structure. In lithium-ion cylindrical batteries, since the negative electrode collector plate is generally made of a harder material, after the negative electrode collector plate is welded with the full collector ear / shell bottom, how to judge the welding strength of the negative electrode collector plate, so the negative electrode collector plate needs to be subjected to a tensile test.
[0005] However, the existing jig for performing a tensile test on the negative electrode current collector after welding has the defects of complex structure and inconvenient operation.
[0006] Therefore, a tensile test fixture is provided to overcome one or more of the above-mentioned drawbacks. Utility Model Content
[0007] The utility model aims to provide a tension test fixture which has a simple structure and is easy to operate.
[0008] To achieve the above purpose, the tensile test fixture of the utility model is suitable for tensile testing of the collector plate after welding, and includes a hook, a fixture body, and an annular body connected to the first end of the fixture body. The hooks are arranged in a plurality of spaces along the circumference of the annular body, and the first end of each hook is assembled and connected to the annular body so that each hook is hung on the annular body, and the second end opposite to each hook is a hook head for hooking the collector plate, and the second end opposite to the fixture body is used for assembly and connection with an external tensile machine.
[0009] Compared with the prior art, with the help of the coordination of the hook, the fixture body and the annular body, when the current collecting disc after welding is subjected to a tensile test, the hook head of the hook hanging on the annular body is hooked on the current collecting disc after welding, and the second end of the fixture body is assembled and connected with an external tensile testing machine. At this time, the tensile testing machine can apply tensile force to the current collecting disc after welding through the tensile testing fixture of the utility model to determine whether the strength of the current collecting disc after welding meets the designed requirements; when the test is completed, the hook head of the hook hanging on the annular body is removed from the current collecting disc after welding, and the tensile test of the next current collecting disc can be carried out. Therefore, the structure of the tensile testing fixture of the utility model is simplified and the convenience of operation is improved. In addition, since there are multiple hooks on the annular body, the uniform distribution of force applied to the current collecting disc is ensured, thereby ensuring the reliability of the tensile test results.
[0010] Preferably, the annular body is provided with a plurality of hanging holes which are arranged spaced apart along the circumference of the annular body, and the first end of the hook is a bent hook structure, and the bent hook structure is hooked in the hanging hole.
[0011] Preferably, the hook structure is larger than the hook head, and the hook structure can rotate in the hanging hole away from or close to the center line of the clamp body.
[0012] Preferably, a mounting hole for assembly and connection with the tensile testing machine is provided on the second end of the clamp body.
[0013] Preferably, a threaded structure for assembly and connection with the tensile testing machine is provided on the second end of the clamp body.
[0014] Preferably, an outwardly convex structure protrudes laterally from the first end of the clamp body, the annular body is connected to the outwardly convex structure, and the annular body also protrudes from the outwardly convex structure along the direction from the second end to the first end of the clamp body.
[0015] Preferably, the outwardly convex structure and the annular body together form an integrated structure, the outwardly convex structure is also perpendicular to the clamp body, and the annular body is also flush with the outwardly convex structure in the outwardly convex direction of the outwardly convex structure.
[0016] Preferably, the cross-sectional outer contour of the clamp body is circular, elliptical or regular polygonal, the cross-sectional outer contour of the annular body is circular, elliptical or regular polygonal, and the center lines of the clamp body and the annular body are parallel or coincident.
[0017] Preferably, all the hanging holes are arranged in a circle at equal intervals on the annular body, and the hook has a straight line segment between the hook head and the hook structure, which can be parallel to or at an angle to the center line of the clamp body when subjected to force.
[0018] Preferably, the hook heads of all the hooks are arranged to face each other. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional diagram of the tension test fixture of the first embodiment of the utility model.
[0020] Figure 2 yes Figure 1 The tensile test fixture is shown in a plan view along the direction indicated by arrow A.
[0021] Figure 3 yes Figure 1 The tensile test fixture is shown in a plan view viewed from the direction opposite to that indicated by arrow A.
[0022] Figure 4 yes Figure 1 A plan view of the tensile test fixture shown when viewed from the side.
[0023] Figure 5 is along Figure 4 Internal view cut along the midline BB.
[0024] Figure 6 yes Figure 4 The status diagram of the collecting plate and the tensile machine is shown in the figure.
[0025] Figure 7 It is a plan view of a tension test fixture according to the second embodiment of the present utility model. DETAILED DESCRIPTION
[0026] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals represent like elements.
[0027] See also Figure 1 and Figure 6 The tension test fixture 100 of the first embodiment is suitable for performing tension test on the collector plate 200 after welding. The tensile machine 300 applies tension to the collector plate 200 through the tension test fixture 100 of the first embodiment. The direction of the tension is shown in FIG. Figure 6 F in the figure is used to judge whether the welding strength of the current collecting plate 200 meets the design requirements.
[0028] Recombination Figure 4 and Figure 5The first embodiment of the tensile test fixture 100 includes a hook 10, a fixture body 20, and an annular body 30 connected to the first end 21 of the fixture body 20. The hooks 10 are arranged in a spaced relationship along the circumference of the annular body 20, so that the hooks 10 can hook the welded current collecting plate 200 from six directions, thereby ensuring the uniformity of the force distribution on the welded current collecting plate 200; obviously, according to actual needs, the number of hooks 10 can also be two, three, four, five or seven, so it is not limited to the number of hooks 10. Figures 1 to 3 In addition, the first end 11 of each hook 10 is assembled and connected with the ring body 30 so that each hook 10 is hung on the ring body 30; Figure 1 , Figure 4 and Figure 5 As an example, the annular body 30 is provided with six hanging holes 31 spaced apart along the circumference of the annular body 30, and the first end 11 of the hook 10 is a bent hook structure, and the bent hook structure 11 is hooked in the hanging hole 31. This design improves the convenience of hanging the hook 10 on the annular body 30, and also facilitates the position adjustment of the hook 10 relative to the annular body 30, so that it is more convenient for the hook 10 to hook the collector plate after welding; obviously, according to actual needs, the first end 11 of the hook 10 and the annular body 30 can be assembled in other ways, so it is not limited to this. In addition, the second end 12 opposite to each hook 10 is a hook head for hooking the collector plate 200, and the second end 22 opposite to the clamp body 20 is used for assembly and connection with the external tensile machine 300, as shown in the state. Figure 6 As shown. Therefore, in the process of performing a tensile test on the welded current collecting plate 200, the tensile machine 300 applies a tensile force to the welded current collecting plate 200 through the tensile test fixture 100 of the first embodiment, and the tensile test on the current collecting plate 200 can be completed. It should be noted that since the hanging holes 31 are used for hanging by the hooks 10, the number of the hanging holes 31 is made to be consistent with the number of the hooks 10. More specifically, as follows:
[0029] like Figure 1 As shown, as an example, all the hanging holes 31 are arranged in a circle at equal intervals on the annular body 30 to ensure that the central angles between any two adjacent hanging holes 31 are the same; the hook 10 has a straight line segment 13 at a position between the hook head 12 and the hook structure 11, and the straight line segment 13 is arranged parallel to the center line 26 of the clamp body 20 when subjected to force, as shown in the state Figure 5As shown; obviously, according to actual needs, the straight line segment 13 can also be arranged at an angle with the center line 26 of the clamp body 20 when subjected to force; therefore, the relationship between the straight line segment 13 and the center line 26 of the clamp body 20 when subjected to force is related to the size of the collecting plate 200, and there are three situations: the first situation is that the straight line segment 13 is parallel to the center line 26 of the clamp body 20 when subjected to force, and the size of the collecting plate 200 corresponding to the first situation is defined as D1; the second situation is that the straight line segment 13 is arranged inwardly at an angle with the center line 26 of the clamp body 20 when subjected to force, and the third situation is that the straight line segment 13 is arranged outwardly at an angle with the center line 26 of the clamp body 20 when subjected to force; wherein, the size of the collecting plate 200 corresponding to the second situation is smaller than D1, and the size of the collecting plate 200 corresponding to the second situation is larger than D1.
[0030] When the straight segment 31 is arranged parallel to the center line 26 of the clamp body 20 under stress, combined with the design of "all the hanging holes 31 are arranged in a circle at equal intervals and the straight segment 13 of the hook 10 is parallel to the center line 26 of the clamp body 20", it is effectively ensured that the direction of the tension applied by the external tensile testing machine 300 to the clamp body 20 is parallel to the direction of the tension applied by the hook 10 to the welded collector plate 200. In addition, the hook 10 applies force to the welded collector plate 200 from multiple positions with equal central angles to each other, thereby maximally ensuring the accuracy and reliability of the tensile test results of the welded collector plate 200. In addition, Figure 1 , Figure 3 , Figure 4 and Figure 5 As an example, the hook heads 12 of all the hooks 10 are arranged to face each other, so as to meet the need of all the hooks 10 to hook the collecting plate 200 from the direction surrounding the collecting plate 200. Figure 1 , Figure 3 , Figure 4 and Figure 5 As an example, the hook structure 12 is larger than the hook head 11, that is, the hook structure 12 is a large hook and the hook head 11 is a small hook. The hook structure 12 can be rotated away from or close to the center line 26 of the clamp body 20 in the hanging hole 31, so that the hook 10 can flexibly adjust the position of the hook 10 according to the size of the current collecting plate 200, so that the hook 10 can meet the needs of current collecting plates 200 of different sizes. It should be noted that according to actual needs, the hook structure 12 can also be made into the same size as the hook head 11, so it is not necessary to use Figure 1 , Figure 3 , Figure 4 and Figure 5 Limits shown.
[0031] like Figure 1 , Figure 4 and Figure 5As shown, as an example, a mounting hole 23 for assembling and connecting with the tensile machine 300 is provided on the second end 22 of the clamp body 20, so as to facilitate the assembly and connection between the second end 22 of the clamp body 20 and the tensile machine 300; optionally, as an example, the mounting hole 23 is a circular hole, so as to facilitate the opening and processing of the mounting hole 23 on the second end 21 of the clamp body 20; obviously, according to actual needs, the mounting hole 23 can also be an elliptical hole or a regular polygon, etc., so it is not limited to Figure 4 Limits shown.
[0032] like Figure 5 As shown, an outer convex structure 25 protrudes laterally from the first end 21 of the clamp body 20. Optionally, as an example, the outer convex structure 25 protrudes outward from the first end 21 of the clamp body 20 along the radial direction of the clamp body 20, so that the outer convex structure 25 is perpendicular to the clamp body 20, that is, the radial direction of the clamp body 20 is a special lateral direction of the clamp body 20. In addition, the annular body 30 is connected to the outer convex structure 25, so that the first end 21 of the clamp body 20 is connected to the annular body 30 through the outer convex structure 25. Optionally, as an example, the outer convex structure 25 and the annular body 30 together constitute an integral structure, so that the annular body 30, the outer convex structure 25 and the clamp body 20 can be obtained by an integrated manufacturing method, such as by machining or casting, thereby effectively reducing the number of assembly steps. In addition, the annular body 30 is also flush with the outer convex structure 25 in the outward convex direction of the outer convex structure 25, as shown in the state. Figures 2 to 5 As shown, the annular body 30 and the outer protruding structure 25 are convenient for processing and manufacturing; and the annular body 30 also protrudes from the outer protruding structure 25 along the direction from the second end 22 to the first end 21 of the clamp body 20 (i.e., the direction indicated by arrow A), so that the design provides more sufficient space for the hook 20 to be hung on the annular body 30 and the relative movement. Figure 2 and Figure 3 As an example, the cross-sectional outer contours of the clamp body 20 and the ring body 30 are both circular, which is more convenient for processing and manufacturing. Obviously, according to actual needs, the cross-sectional outer contours of the clamp body 20 and the ring body 30 can also be elliptical or regular polygonal. Figure 2 and Figure 3 In addition, the center lines 26 (32) of the clamp body 20 and the annular body 30 coincide with each other, and the state is shown Figure 2 , Figure 3 and Figure 5 Obviously, according to actual needs, the center lines 26 (32) of the clamp body 20 and the annular body 30 are parallel, so it is not necessary to Figure 2 , Figure 3 and Figure 5 Limits shown.
[0033] like Figure 7As shown, a second embodiment of the tensile test fixture 100 ′ is shown. The structure of the tensile test fixture 100 ′ is substantially the same as that of the first embodiment of the tensile test fixture 100 ′, and the differences are as follows:
[0034] In the second embodiment of the tension test fixture 100', the second end 22 of the fixture body 20' is a threaded structure. Optionally, as an example, the threaded structure 22 is an external threaded structure. Obviously, it is selected to be an internal threaded structure according to actual needs. Figure 7 Limits shown.
[0035] In the tension test fixture 100 of the first embodiment, a mounting hole 23 is disposed on the second end 22 of the fixture body 20 .
[0036] Apart from the above differences, the other two are the same, so I will not go into details here.
[0037] Compared with the prior art, by means of the cooperation of the hook 10, the fixture body 20 and the annular body 30, when the welded collector plate 200 is subjected to a tensile test, the hook head 12 of the hook 10 hung on the annular body 30 hooks the welded collector plate 200, and the second end 22 of the fixture body 20 is assembled and connected with the external tensile machine 300. Figure 6 As shown; at this time, the tensile testing machine 300 can apply tension to the welded current collecting plate 200 through the tensile testing fixture 100 (100') of the utility model to determine whether the strength of the welded current collecting plate 200 meets the design requirements; when the test is completed, the hook head 12 of the hook 10 hung on the annular body 30 is removed from the welded current collecting plate 200, and the tensile test of the next current collecting plate 200 can be started. Therefore, the structure of the tensile testing fixture 100 (100') of the utility model is simplified and the convenience of operation is improved. In addition, since there are multiple hooks 10 on the annular body 30, the uniformity of the force distribution on the current collecting plate 200 is ensured, thereby ensuring the reliability of the tensile test results.
[0038] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.
Claims
1. A tension test fixture, suitable for performing tension test on a welded collector plate, characterized in that: It includes a hook, a clamp body and an annular body connected to the first end of the clamp body, wherein the hooks are arranged in a plurality along the circumference of the annular body, and the first end of each hook is assembled and connected to the annular body so that each hook is hung on the annular body, and the second end opposite to each hook is a hook head for hooking the collecting plate, and the second end opposite to the clamp body is used for assembly and connection with an external tensile machine.
2. The tensile test fixture according to claim 1, characterized in that: The annular body is provided with a plurality of hanging holes which are arranged spaced apart along the circumference of the annular body. The first end of the hook is a bent hook structure, and the bent hook structure is hooked in the hanging hole.
3. The tensile test fixture according to claim 2, characterized in that: The hook structure is larger than the hook head, and the hook structure can rotate in the hanging hole away from or close to the center line of the clamp body.
4. The tensile test fixture according to claim 1, characterized in that: The second end of the clamp body is provided with a mounting hole for assembly and connection with the tensile machine.
5. The tension test fixture according to claim 1, characterized in that: The second end of the clamp body is provided with a threaded structure for assembly and connection with the tensile machine.
6. The tensile test fixture according to claim 1, characterized in that: An outwardly convex structure protrudes laterally from the first end of the clamp body, the annular body is connected to the outwardly convex structure, and the annular body also protrudes from the outwardly convex structure along the direction from the second end to the first end of the clamp body.
7. The tensile test fixture according to claim 6, characterized in that: The outer convex structure and the annular body together form an integrated structure. The outer convex structure is also perpendicular to the clamp body. The annular body is also flush with the outer convex structure in the outer convex direction of the outer convex structure.
8. The tension test fixture according to claim 2, characterized in that: The cross-sectional outer contour of the clamp body is circular, elliptical or regular polygonal, the cross-sectional outer contour of the annular body is circular, elliptical or regular polygonal, and the center lines of the clamp body and the annular body are parallel or coincident.
9. The tensile test fixture according to claim 8, characterized in that: All the hanging holes are arranged in a circle at equal intervals on the annular body, and the hook has a straight line segment between the hook head and the hook structure. When subjected to force, the straight line segment can be arranged parallel to or at an angle to the center line of the clamp body.
10. The tensile test fixture according to claim 1, characterized in that: The hook heads of all the hooks are arranged to face each other.