Detection tool

Abstract

The application provides a detection tool for bonding the current collecting piece, and the detection tool is provided with a clearance space corresponding to the through hole. The clearance space is designed at the center of the detection tool corresponding to the through hole. Since no glue is arranged at the clearance space, when the current collecting piece is pulled by using the detection tool, the welding condition can be accurately judged through the detection result, the glue flowing into the through hole is avoided to cause detection error, and thus the detection precision is increased.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a testing fixture. Background Technology

[0002] The current collector is an indispensable part of a cylindrical battery. However, it needs to be connected to the adapter plate via flexible welding. After connection, the welding condition may not be accurately assessed, posing a risk of poorly welded batteries leaking out. To mitigate this risk, welding inspection fixtures can be used to standardize the assessment of welding conditions and accurately determine the battery's welding status. In related technologies, the inspection fixture is usually connected to the current collector with adhesive. Since the current collector has a liquid injection hole in the middle, there is a risk that the adhesive from the inspection fixture may flow into the liquid injection hole, affecting battery safety. Utility Model Content

[0003] The embodiments of this application provide a testing fixture that can improve the technical problem of glue flowing into the injection hole of the manifold.

[0004] This application provides a testing fixture for connecting a current collector. The current collector has a through hole in its middle. The testing fixture is used to bond the current collector. The testing fixture has a clearance space corresponding to the through hole.

[0005] In some embodiments, the detection fixture includes a clamping member and a first connecting portion. The clamping member is driven by an external component, and the first connecting portion is used to bond the current collector and provide the clearance space. The clamping member is connected to the side of the first connecting portion away from the current collector.

[0006] In some embodiments, there are multiple first connecting portions, and the multiple first connecting portions are spaced apart around the through holes of the current collector.

[0007] In some embodiments, the detection fixture further includes a second connecting portion, the second connecting portion including a first portion and a second portion connected to each other, the clamping member including a bottom wall facing the collector, the first connecting portion being connected to the bottom wall, the clamping member including a side wall surrounding the bottom wall, the first portion being connected to the side wall, and the second portion being connected to the first connecting portion.

[0008] In some embodiments, each of the first connecting portion and each of the second connecting portions forms a connector, and the detection fixture includes a plurality of connectors, which are arranged around the clamping member.

[0009] In some embodiments, each of the connectors includes a bottom surface facing the collector, the bottom surface including a first side facing the clearance space, the first side being arc-shaped.

[0010] In some embodiments, the bottom surface further includes a second side located on the side of the first side away from the clearance space, and the second side is arc-shaped.

[0011] In some embodiments, the arc length of the second side is greater than the arc length of the first side, and the bottom surface further includes two connecting edges, the first side being connected to one end of the connecting edge, and the second side being connected to the other end of the connecting edge.

[0012] In some embodiments, the central angle corresponding to the first side is between 30° and 50°, and / or;

[0013] The central angle corresponding to the second side is between 30° and 50°.

[0014] In some embodiments, the diameter of the second side to the center line of the clearance space is between 1.0 mm and 30.0 mm, and / or;

[0015] The height of the second connecting portion along the axial direction of the detection fixture is between 0.2mm and 20.0mm, and / or;

[0016] The length of the connecting edge along the radial direction of the detection fixture is 1.0mm-10.0mm.

[0017] In some embodiments, the diameter of the clearance space along the radial direction of the detection fixture is between 0.5 mm and 20.0 mm.

[0018] In some embodiments, the clamping member includes a clamping portion and a plate body, the plate body being connected to the side of the first connecting portion away from the current collector, the clamping portion being connected to the center of the plate body and protruding from the side of the plate body away from the current collector.

[0019] In some embodiments, the clamping portion includes a body and a plurality of protruding structures, the body being connected to the plate, and the plurality of protruding structures being connected to the body and protruding in a direction away from the body.

[0020] In some embodiments, the distance between two adjacent protrusions is between 0.05 mm and 15.0 mm.

[0021] In some embodiments, the height of the clamping portion along the axial direction of the detection fixture is between 1.0 mm and 30.0 mm, and / or;

[0022] The thickness of the clamping part along the radial direction of the detection fixture is between 0.2 mm and 15.0 mm.

[0023] The beneficial effects of the embodiments of this application are as follows:

[0024] This application provides a testing fixture for bonding the current collector. The testing fixture has a clearance space corresponding to the through hole. The clearance space at the center of the testing fixture corresponds to the through hole. Since no glue is placed in the clearance space, when the current collector is pulled using the testing fixture, the welding condition can be accurately judged through the test results, avoiding glue flowing into the through hole and causing testing errors, thereby increasing testing accuracy. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This application provides a schematic diagram of the structure of a testing fixture as an embodiment. Figure 1 ;

[0027] Figure 2 This application provides a schematic diagram of the structure of a testing fixture as an embodiment. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of one embodiment of the testing fixture provided in this application;

[0029] Figure 4 This is a side view of the testing fixture provided in an embodiment of this application;

[0030] Figure 5 This is a top view of the testing fixture provided in an embodiment of this application;

[0031] Figure 6 This is a bottom view of the testing fixture provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Testing fixtures;

[0034] 10. Connector; 101. Bottom surface; 1011. First side; 1012. Second side; 1013. Connecting edge; 11. First connecting part; 111. Clearance space; 1111. Inner wall; 21. Second connecting part;

[0035] 30. Clamping component; 31. Clamping part; 311. Body; 312. Protruding structure; 32. Plate; 321. Bottom wall; 322. Side wall. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the 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. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0037] The current collector is an indispensable part of a cylindrical battery. However, the current collector needs to be connected to the adapter plate via flexible welding. After connection, the welding condition may not be accurately judged, posing a risk of poorly welded batteries leaking out. To mitigate this risk, a welding inspection fixture 100 can be used to standardize the judgment of the welding condition and accurately assess the battery's welding status. In related technologies, the inspection fixture 100 is usually connected to the current collector with adhesive. Since the current collector has a liquid injection hole in the middle, there is a risk that the adhesive from the inspection fixture 100 may flow into the liquid injection hole, affecting battery safety.

[0038] Please refer to Figures 1-2 , Figure 1 This application provides a schematic diagram of the structure of a testing fixture 100 according to an embodiment. Figure 1 , Figure 2 This application provides a schematic diagram of the structure of a testing fixture 100 according to an embodiment. Figure 2 This application provides a testing fixture 100 for bonding the current collector. The testing fixture 100 has a clearance space 111 corresponding to the through hole. The clearance space 111 is designed at the center of the testing fixture 100 corresponding to the through hole. Since no glue is placed in the clearance space 111, when the current collector is pulled using the testing fixture 100, the welding condition can be accurately judged through the test results, avoiding glue flowing into the through hole and causing testing errors, thereby increasing the testing accuracy.

[0039] Specifically, by inspecting the bonding of the current collector using fixture 100, a tensile testing machine is used to perform a vertical pull-out test on fixture 100. Because the force is uniform under vertical pull-out conditions, this simulates the stress conditions in the actual working environment and is not affected by human error. This allows for a better inspection of the stability of the welding between the current collector and the tab. For example, the welding condition can be judged by observing whether the tensile test results conform to a normal distribution or by observing whether the residual weld area on the current collector and the tab is uniform.

[0040] In some embodiments, the detection fixture 100 includes a clamping member 30 and a first connecting portion 11. The clamping member 30 is driven by an external component, and the first connecting portion 11 is used to bond the current collector and provide the clearance space 111. The clamping member 30 is connected to the side of the first connecting portion 11 away from the current collector.

[0041] Understandably, the clamping member 30 is connected to the first connecting part 11. When the clamping member 30 is driven by an external component, the clamping member 30 can drive the first connecting part 11 to move, so as to ensure stable support and appropriate force transmission during operation, thereby ensuring the efficiency and reliability of the operation of the inspection fixture 100.

[0042] In some embodiments, there are multiple first connecting portions 11, and the multiple connecting portions are spaced apart around the through holes of the current collector.

[0043] Specifically, multiple first connecting parts 11 are arranged around the through hole of the current collector, and the multiple first connecting parts 11 are evenly distributed to achieve uniform bonding of the current collector, avoid concentrated force causing unstable connection, and prevent loosening during the testing process.

[0044] In some embodiments, each of the first connecting portion 11 and each of the second connecting portion 21 forms a connector 10, and the detection fixture includes a plurality of connectors 10, which are arranged around the clamping member 30.

[0045] Understandably, the second connecting part 21 and the first connecting part 11 are integrally formed into the connector 10, which can increase the size of the connector 10 and the connection area between the connector 10 and the current collector. The second connecting part 21 and the first connecting part 11 can be an integrally formed structure.

[0046] In some embodiments, the detection fixture 100 further includes a second connecting portion 21, which includes a first portion and a second portion connected to each other. The clamping member 30 includes a bottom wall 321 facing the current collector, and the first connecting portion 11 is connected to the bottom wall 321. One end of the first connecting portion 11 facing away from the bottom wall 321 is used to bond the current collector. The clamping member 30 also includes a side wall 322 surrounding the bottom wall 321, with the first portion connected to the side wall 322 and the second portion connected to the first connecting portion 11.

[0047] Specifically, the height of the first part of the second connecting part 21 is the same as the height of the side wall 322, the height of the second part of the second connecting part 21 is the same as the height of the first connecting part 11, the projection of the first connecting part 11 and the clamping member 30 on the same plane is located inside the clamping member 30, and the projection of the second connecting part 21 and the clamping member 30 on the same plane is greater than the clamping member 30.

[0048] In some embodiments, the first connecting portion 11 and the second connecting portion 21 form a connector 10, and a plurality of connectors 10 are arranged around the clamping member 30. In this application, arranging a plurality of connectors 10 around the clamping member 30 helps ensure the stability of the component. This circumferential arrangement better adapts to the current collector, preventing positional shift of the component during operation, thereby avoiding poor welding or unstable connections. The number of connectors 10 can be 3, 4, 5, 6, etc., and is not limited herein.

[0049] In some embodiments, each of the connectors 10 includes an inner wall 1111 facing the clearance space 111, the inner wall 1111 surrounding the clearance space 111. It is understood that the inner wall 1111 surrounding the clearance space 111 increases the height of the clearance space 111, preventing interference during bonding.

[0050] Please refer to Figure 3 , Figure 3 This is a schematic diagram of one embodiment of the detection fixture 100 provided in the embodiments of this application. In some embodiments, each of the connectors 10 includes a bottom surface 101 facing the collector, the bottom surface 101 including a first side 1011 facing the clearance space 111, the first side 1011 being arc-shaped.

[0051] In some embodiments, the bottom surface 101 further includes a second side 1012, which is located on the side of the first side 1011 away from the clearance space 111, and the second side 1012 is arc-shaped. The connector 10 is formed as a ring structure, and the bottom surface 101 of the connector 10 is annular. The bottom surface 101 of the connector 10 can also be quadrilateral, trapezoid, triangle, etc. The shape of the connector 10 can be set according to the shape of the current collector, and this application does not limit it.

[0052] In some embodiments, the arc length of the second side 1012 is greater than the arc length of the first side 1011. The bottom surface 101 also has two connecting sides 1013, with the first side 1011 connected to one end of each connecting side 1013 and the second side 1012 connected to the other end of each connecting side 1013. It is understood that since the through-hole is circular and the battery is mostly cylindrical, the bottom surface 101 of each connector 10 forms a fan-shaped structure. This fan-shaped structure maximizes space utilization and adapts to the structure of the current collector. The second side 1012 being larger than the first side 1011, forming a radial design, can evenly distribute externally applied pressure or stress, which is beneficial for ensuring detection results.

[0053] In some embodiments, one of the first side 1011 and the second side 1012 is curved. For example, the first side 1011 may be curved and the second side 1012 may be straight, or the first side 1011 may be straight and the second side 1012 may be curved.

[0054] In some embodiments, when the first side 1011 is arc-shaped, the inner wall 1111 is arc-shaped, and the clearance space 111 is a cylindrical space as a whole.

[0055] Please refer to Figures 5-6 , Figure 5 This is a top view of the testing fixture 100 provided in an embodiment of this application. Figure 6 This is a bottom view of the inspection fixture 100 provided in an embodiment of this application.

[0056] In some embodiments, the central angle corresponding to the first side 1011 is between 30° and 50°. For example, the central angle can be 30°, 32°, 35°, 38°, 40°, 42°, 45°, 50°, etc. In some embodiments, the central angle corresponding to the second side 1012 is between 30° and 50°. For example, the central angle can be 30°, 32°, 35°, 38°, 40°, 42°, 45°, 50°, etc., and this application does not impose any limitations on this.

[0057] In some embodiments, the diameter L1 from the second side 1012 to the center line of the clearance space 111 is between 1.0 mm and 30.0 mm. The diameter L1 can also be 1.0 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.8 mm, 1.9 mm, 2 mm, 5 mm, 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, etc. The diameter from the second side 1012 to the center line of the clearance space 111 can be adjusted according to the structure of the current collector, and this application does not limit it.

[0058] In some embodiments, the height H1 of the second connecting portion 21 along the axial direction of the detection fixture 100 is between 0.2mm and 20.0mm. The height H1 of the second connecting portion 21 can also be 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 15mm, 20mm, etc. The height of the second connecting portion 21 can be adjusted according to the structure of the current collector, and this application does not limit it.

[0059] In some embodiments, the length D1 of the connecting edge 1013 along the radial direction of the detection fixture 100 is 1.0mm-10.0mm. The length D1 can also be 1.0mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.8mm, 1.9mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc. The length of the connecting edge 1013 can be adjusted according to the structure of the current collector, and this application does not limit it.

[0060] In some embodiments, the diameter L2 of the clearance space 111 along the radial direction of the detection fixture 100 is between 0.5mm and 20.0mm. The diameter L2 of the clearance space 111 can also be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.8mm, 1.9mm, 2mm, 5mm, 10mm, 15mm, 20mm, etc. The diameter of the clearance space 111 can be adjusted according to the structure of the current collector, and is not limited herein.

[0061] Please continue to refer to this. Figure 2 and Figure 4 In some embodiments, the clamping member 30 includes a clamping part 31 and a plate 32. The plate 32 is connected to the first connecting part 11 and is connected to the side of the first connecting part 11 opposite to the current collector. The clamping part 31 is connected to the center of the plate 32 and protrudes from the side of the plate 32 opposite to the current collector. Connecting the clamping part 31 to the center of the plate 32 helps to ensure uniform force during tensile testing, allowing the object to maintain a good balance during the test and ensuring the reliability of the test results.

[0062] In some embodiments, the clamping part 31, the plate 32, the first connecting part 11 and the second connecting part 21 are integrally formed structures. The integrally formed structure ensures the overall structural strength, making the overall structure more stable and reliable, and preventing the clamping part 31 and the plate 32 from falling off during the clamping process, which would affect the detection efficiency and detection results.

[0063] In some embodiments, the clamping part 31 is designed to be square, and the positioning plate 32 is in the center. This design can facilitate cooperation with tensile testing machines. The square structure is generally easy to be clamped precisely, avoiding loosening or misalignment due to unsuitable shape, and is easy to match with standard fixtures or mechanical equipment.

[0064] In some embodiments, the clamping part 31 includes a body 311 and a plurality of protruding structures 312. The body 311 is connected to the plate 32, and the plurality of protruding structures 312 are connected to the body 311 and protrude in a direction away from the body 311. The protruding structures 312 can be linear, and the design of the protruding structures 312 can significantly increase the contact friction between the clamping part 31 and the fixture. The greater the friction, the more stable the clamping force, reducing the possibility of the detection fixture 100 sliding or shifting during the clamping process.

[0065] The distance D2 between two adjacent protruding structures 312 is between 0.05mm and 15.0mm. The height can also be 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc., and is not limited herein.

[0066] The height H2 of the clamping part 31 along the axial direction of the detection fixture 100 is between 1.0mm and 30.0mm. The height can also be 1.0mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.8mm, 1.9mm, 2mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, etc. The height of the clamping part 31 can be set according to actual conditions, and this application does not limit it.

[0067] The thickness D3 of the clamping part 31 along the radial direction of the detection fixture 100 is between 0.2mm and 15.0mm. The height can also be 0.2mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.8mm, 1.9mm, 2mm, 5mm, 8mm, 10mm, 15mm, etc. The thickness of the clamping part 31 can be set according to the actual situation. For example, when the clamping part 31 is square, the thickness of the length and width can be between 0.2mm and 15.0mm, or the thickness of one of the length and width can be between 0.2mm and 15.0mm. This application does not limit this.

[0068] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A testing fixture for connecting a current collector, wherein the current collector has a through hole in its center, characterized in that, The testing fixture is used to bond the current collector, and the testing fixture has a clearance space corresponding to the through hole.

2. The testing fixture according to claim 1, characterized in that, The testing fixture includes a clamping member and a first connecting part. The clamping member is driven by an external component, and the first connecting part is used to bond the current collector and provide the clearance space. The clamping member is connected to the side of the first connecting part away from the current collector.

3. The testing fixture according to claim 2, characterized in that, There are multiple first connecting parts, and the multiple first connecting parts are arranged at intervals around the through hole of the current collector.

4. The testing fixture according to claim 3, characterized in that, The clamping member includes a bottom wall facing the collector, and the first connecting portion is connected to the bottom wall. The detection fixture also includes a plurality of second connecting portions, each of which includes a first part and a second part connected to each other. The clamping member also includes a side wall surrounding the bottom wall, the first part being connected to the side wall, and the second part being connected to one of the first connecting portions.

5. The testing fixture according to claim 4, characterized in that, Each of the first connecting portion and each of the second connecting portions forms a connector, and the detection fixture includes a plurality of connectors, which are arranged in a ring around the clamping member.

6. The testing fixture according to claim 5, characterized in that, Each of the connectors includes a bottom surface facing the collector, the bottom surface including a first side facing the clearance space, the first side being arc-shaped.

7. The testing fixture according to claim 6, characterized in that, The bottom surface also includes a second side, which is located on the side of the first side away from the clearance space, and the second side is arc-shaped.

8. The testing fixture according to claim 7, characterized in that, The arc length of the second side is greater than that of the first side. The bottom surface also includes two connecting sides, with the first side connected to one end of each connecting side and the second side connected to the other end of each connecting side.

9. The testing fixture according to claim 8, characterized in that, The central angle corresponding to the first side is between 30° and 50°, and / or; The central angle corresponding to the second side is between 30° and 50°.

10. The testing fixture according to claim 8, characterized in that, The diameter L1 from the second side to the center line of the clearance space is between 1.0 mm and 30.0 mm, and / or; The height H1 of the second connecting portion along the axial direction of the detection fixture is between 0.2mm and 20.0mm, and / or; The length D1 of the connecting edge along the radial direction of the detection fixture is 1.0mm-10.0mm.

11. The testing fixture according to claim 1, characterized in that, The diameter L2 of the clearance space along the radial direction of the detection fixture is between 0.5 mm and 20.0 mm.

12. The testing fixture according to any one of claims 2-10, characterized in that, The clamping member includes a clamping part and a plate body. The plate body is connected to the side of the first connecting part away from the current collector. The clamping part is connected to the center of the plate body and protrudes from the side of the plate body away from the current collector.

13. The testing fixture according to claim 12, characterized in that, The clamping part includes a body and a plurality of protruding structures. The body is connected to the plate, and the plurality of protruding structures are connected to the body and protrude in a direction away from the body.

14. The testing fixture according to claim 13, characterized in that, The distance D2 between two adjacent protrusions is between 0.05mm and 15.0mm.

15. The testing fixture according to claim 12, characterized in that, The height H2 of the clamping part along the axial direction of the detection fixture is between 1.0 mm and 30.0 mm, and / or; The thickness D3 of the clamping part along the radial direction of the detection fixture is between 0.2 mm and 15.0 mm.

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