Detection tool and detection method for detecting insulating coating of battery end face
By designing a testing fixture, the protrusion of the insulating coating on the battery end face is determined by the resistance or vibration during rotation, which solves the problem of low testing efficiency in the existing technology and achieves fast and accurate protrusion detection.
Patent Information
- Application Number
- CN202610760156.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-28
- Publication Date
- 2026-08-04
AI Technical Summary
In the prior art, abnormal protrusions are easily generated during the application of the insulating coating on the battery end face, which leads to deterioration of insulation performance and reduction of durability, and is difficult to detect quickly.
Design a testing fixture, including a fixture body and a testing section. By inserting an electrode terminal into a mating hole and rotating it around the electrode, the testing section mates with the surface of the insulating coating. During the rotation, the presence of a protrusion is determined by resistance or vibration.
It enables rapid and accurate detection of abnormal protrusions in the insulating coating on the battery end face, improving detection efficiency and reliability and preventing measurement errors.
Smart Images
Figure CN122505804A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of batteries, and in particular to a testing fixture and a method for testing the insulating coating on the end face of a battery using the testing fixture. Background Technology
[0002] To prevent accidental contact between the battery casing and external conductors, which could lead to short circuits, and to protect the cell casing from scratches, impacts, and abrasions caused by the external environment, related technologies primarily employ applying insulating coatings to the cylindrical and end faces of the battery. In these technologies, only the edges near the cylindrical surfaces are coated on the end faces. During the end-face coating process, abnormal protrusions often occur due to the intrusion of foreign matter, compressed air contamination, and substrate contamination. These protrusions can lead to localized degradation of insulation performance, reduced coating durability and lifespan, and affect appearance quality. Therefore, how to quickly detect abnormal protrusions in the insulating coating on the battery end faces is a problem that urgently needs to be solved. Summary of the Invention
[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a testing fixture that can quickly detect abnormal protrusions in the insulating coating on the battery end face.
[0004] The present invention also aims to provide a method for detecting the insulating coating on the end face of a battery using a testing fixture.
[0005] According to a first aspect of the present invention, a testing fixture includes: a fixture body, the fixture body including a terminal mating portion, the terminal mating portion having a mating hole for accommodating an electrode terminal disposed on the end face of the battery, the fixture body being rotatable around the electrode terminal; and a testing portion disposed on the fixture body and located on the outer periphery of the terminal mating portion, the testing portion being used to mate with the surface of the insulating coating for detecting whether there is a protrusion on the surface of the insulating coating.
[0006] According to the present invention, the testing fixture has a mating hole on the fixture body that mates with the electrode terminal on the battery end face. The fixture body is rotated around the electrode. The detection part disposed on the fixture body mates with the surface of the insulating coating and rotates together with the fixture body. During the rotation, the presence of abnormal protrusions on the surface of the insulating coating can be quickly and accurately determined based on the magnitude of the resistance or vibration transmitted by the detection part to the fixture body.
[0007] According to some embodiments of the present invention, the cross-section of the mating hole is circular; and / or, the mating hole is a through hole.
[0008] According to some embodiments of the present invention, the terminal mating portion is projected in a circular shape along the axial direction of the mating hole; and / or, the tooling body is projected in a circular shape along the axial direction of the mating hole.
[0009] According to some embodiments of the present invention, the mating hole includes a main body section and a flared section, the flared section being connected to at least one side of the main body section in the axial direction, and the cross-sectional area of the flared section being larger than the cross-sectional area of the main body section.
[0010] According to some embodiments of the present invention, the cross-sectional area of the flared section gradually increases in the direction from the main body section to the flared section.
[0011] According to some embodiments of the present invention, the detection portion extends radially along the mating hole; and / or, the detection portion is connected to the outer peripheral wall of the terminal mating portion.
[0012] According to some embodiments of the present invention, the tooling body has a first side and a second side disposed opposite to each other along the axial direction of the mating hole, the terminal mating part includes a mating surface, the detection part includes a detection surface, the detection surface and the mating surface are both located on the first side, the mating surface is located on the side of the detection surface away from the second side, the detection surface is disposed opposite to the surface of the insulating coating, the mating surface is disposed to fit against the exposed area of the battery end face, the exposed area is not coated with the insulating coating and is located on the outer periphery of the electrode terminal, and the insulating coating is located on the outer periphery of the exposed area.
[0013] According to some embodiments of the present invention, the mating surface is a plane; and / or, the detection surface is a plane.
[0014] According to some embodiments of the present invention, the distance between the mating surface and the detection surface in the axial direction of the mating hole is b, where b ≤ 0.35 mm.
[0015] According to some embodiments of the present invention, the tooling body further includes an annular plate, the annular plate being connected to the outer periphery of the terminal mating portion and surrounding the terminal mating portion, and the detection portion being disposed on one side of the annular plate in the axial direction and protruding from the annular plate in the axial direction.
[0016] According to some embodiments of the present invention, one end of the detection part is connected to the outer peripheral wall of the terminal mating part, and the other end of the detection part extends to the outer peripheral edge of the annular plate.
[0017] According to some embodiments of the present invention, the testing fixture is a plastic part; and / or, the testing fixture is an integrally molded part.
[0018] According to a second aspect of the present invention, a method for detecting the insulating coating on the end face of a battery using the detection fixture described in the first aspect of the present invention includes: inserting the electrode terminal into the mating hole, and making the detection part fit with the surface of the insulating coating; rotating the detection fixture, and stopping to observe and confirm the position of the protrusion if there is a feedback vibration from a protrusion impact or if the fixture cannot be rotated.
[0019] According to the detection method of the present invention, the electrode terminal is inserted into the mating hole so that the detection part on the detection fixture mates with the surface of the insulating coating. The fixture body is rotated around the electrode, and the detection part disposed on the fixture body rotates together with the fixture body. During the rotation, the presence of abnormal protrusions on the surface of the insulating coating can be quickly and accurately determined according to the magnitude of the resistance or vibration transmitted by the detection part to the fixture body.
[0020] According to some embodiments of the present invention, the concentricity between the terminal mating portion and the electrode terminal is less than or equal to 0.02 mm.
[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of a battery with an insulating coating according to some embodiments of the present invention; Figure 2 This is a partial cross-sectional view of a testing fixture according to some embodiments of the present invention used for testing the insulating coating on the end face of a battery; Figure 3 This is a perspective view of a testing fixture according to some embodiments of the present invention; Figure 4 yes Figure 3 A bottom view of the inspection fixture in the image; Figure 5 yes Figure 3 The main view of the inspection fixture in the middle; Figure 6 It is along Figure 5 Cross-sectional view of line AA in the middle; Figure 7 yes Figure 6 A magnified view of a section at point B.
[0023] Figure label: 1. Inspection fixture; 10. Fixture body; 11. Terminal mating part; 111. Mating surface; 12. Mating hole; 121. Main body section; 122. Flared section; 13. First side; 14. Second side; 20. Inspection part; 21. Inspection surface; 30. Annular plate; 40. Battery end face; 41. Insulating coating; 42. Electrode terminal; 43. Exposed area. Detailed Implementation
[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0025] The detection fixture 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
[0026] refer to Figures 1-3 According to an embodiment of the present invention, the testing fixture 1 is used to test the insulating coating 41 of the battery end face 40. The testing fixture 1 includes a fixture body 10 and a testing part 20.
[0027] The fixture body 10 includes a terminal mating portion 11, which has a mating hole 12 for accommodating an electrode terminal 42 disposed on the battery end face 40. The fixture body 10 is rotatable around the electrode terminal 42. A detection portion 20 is disposed on the fixture body 10 and located on the outer periphery of the terminal mating portion 11. The detection portion 20 is used to mate with the surface of the insulating coating 41 to detect whether there are protrusions on the surface of the insulating coating 41.
[0028] For example, the mating hole 12 of the tooling body 10 is mated with the electrode terminal 42 of the battery end face 40, and the tooling body 10 is rotated. The detection part 20 provided on the tooling body 10 mates with the surface of the insulating coating 41 and rotates together with the tooling body 10. During rotation, if the detection part 20 transmits significant resistance, vibration, or even stops to the tooling body 10, it indicates that there is an abnormal protrusion in the insulating coating 41 corresponding to the detection part 20. The detection tooling 1 is removed, and the corresponding position of the detection part 20 is observed for confirmation. If the detection tooling 1 rotates normally for one revolution, it indicates that there is no abnormal protrusion in the insulating coating 41, and the quality of the insulating coating 41 is qualified.
[0029] The rotation of the inspection fixture 1 can be performed manually.
[0030] According to the detection fixture 1 of the present invention, the mating hole 12 of the fixture body 10 is mated with the electrode terminal 42 of the battery end face 40, and the fixture body 10 is rotated. The detection part 20 provided on the fixture body 10 mates with the surface of the insulating coating 41 and rotates together with the fixture body 10. During the rotation, the presence of abnormal protrusions on the surface of the insulating coating 41 can be quickly and accurately determined based on the magnitude of the resistance or vibration transmitted to the fixture body 10 by the detection part 20.
[0031] In some embodiments of the present invention, reference is made to Figures 2-3 The cross-section of the mating hole 12 is circular. Setting the mating hole 12 as a circular hole facilitates mating with the battery terminal and makes rotation detection of the testing fixture 1 convenient.
[0032] In some embodiments of the present invention, reference is made to Figures 2-3 The mating hole 12 is a through hole. Making the mating hole 12 a through hole allows it to accommodate battery terminals of different sizes, models, and heights, improving the adaptability of the testing fixture 1. At the same time, making the mating hole 12 a through hole also facilitates the machining of the testing fixture 1.
[0033] In some embodiments of the present invention, reference is made to Figures 2-4 The terminal mating part 11 is circular in projection along the axial direction of the mating hole 12. During the rotation of the inspection fixture 1, the terminal mating part 11, which is circular in projection along the axial direction of the mating hole 12, can provide stable support for the inspection fixture 1, reducing measurement errors caused by the tilting of the inspection fixture 1.
[0034] In some embodiments of the present invention, reference is made to Figures 2-4 The main body of the tooling 10 is projected in a circular shape along the axial direction of the mating hole 12. During the rotation of the tooling 1, the main body of the tooling 10, which is projected in a circular shape along the axial direction of the mating hole 12, is easy to drive to rotate.
[0035] In some embodiments of the present invention, reference is made to Figures 3-6 The mating hole 12 includes a main body section 121 and a flared section 122. The flared section 122 is connected to at least one side of the main body section 121 in the axial direction, and the cross-sectional area of the flared section 122 is larger than the cross-sectional area of the main body section 121. Providing a flared section 122 with a larger cross-sectional area on one side of the main body section 121 facilitates the matching and positioning of the battery terminal with the mating hole 12.
[0036] In some embodiments of the present invention, reference is made to Figures 3-6In the direction from the main body section 121 to the flared section 122, the cross-sectional area of the flared section 122 gradually increases. This gradual increase in cross-sectional area makes the mating hole 12 flared in shape. Besides facilitating the matching of the battery terminal with the mating hole 12, the flared shape of the mating hole 12 also provides a guiding function, improving the concentricity between the mating hole 12 and the battery terminal, making the rotational testing process of the testing fixture 1 smoother and reducing measurement errors.
[0037] In some embodiments of the present invention, reference is made to Figures 2-6 The detection section 20 extends radially along the mating hole 12. This radial outward extension of the detection section 20 allows it to sweep a larger area as it rotates with the fixture body 10, resulting in a wider detection range. This allows the detection section 20 to detect the insulating coating 41 portion of the battery end face 40 near the cylindrical edge, improving the reliability of the detection results.
[0038] In some embodiments of the present invention, reference is made to Figures 2-7 The detection section 20 is connected to the outer peripheral wall of the terminal mating section 11. By connecting the detection section 20 to the outer peripheral wall of the terminal mating section 11, the structural strength and stability of the detection section 20 can be improved. In addition, the detection section 20 connected to the outer peripheral wall of the terminal mating section 11 allows for a longer radial length, ensuring that the insulating coating 41 portion near the cylindrical edge of the battery end face 40 falls entirely within the detection range of the detection section 20.
[0039] In some embodiments of the present invention, reference is made to Figures 3-7 The tooling body has a first side 13 and a second side 14 that are axially opposite to each other along the mating hole 12. The terminal mating part 11 includes a mating surface 111, and the detection part 20 includes a detection surface 21. Both the detection surface 21 and the mating surface 111 are located on the first side 13. The mating surface 111 is located on the side of the detection surface 21 that is away from the second side 14. The detection surface 21 is used to be arranged opposite to the surface of the insulating coating 41. The mating surface 111 is used to fit against the exposed area of the battery end face 40. The exposed area is not coated with the insulating coating 41 and is located on the outer periphery of the electrode terminal 42. The insulating coating 41 is located on the outer periphery of the exposed area.
[0040] For example, when the testing fixture 1 is in use, the mating surface 111 of the terminal mating part 11 is in contact with the exposed area of the battery end face 40, and the testing surface 21 of the testing part 20 corresponds to the insulating coating 41 of the battery end face 40.
[0041] The mating surface 111 of the terminal mating part 11 fits into the exposed area of the battery end face 40, which can increase the contact area between the battery end face 40 and the detection fixture 1, provide stable support for the detection fixture 1, and improve measurement reliability.
[0042] In some embodiments of the present invention, reference is made to Figures 3-7 The mating surface 111 is a plane. By setting the mating surface 111 as a plane, the testing fixture 1 will not be skewed after it is in contact with the mating surface 111, making the measurement results of abnormal protrusions more accurate and reliable.
[0043] In some embodiments of the present invention, reference is made to Figures 3-7 The detection surface 21 is a plane. Setting the detection surface 21 as a plane can improve the detection accuracy of abnormal protrusions and prevent measurement errors caused by the detection fixture 1.
[0044] In some embodiments of the present invention, reference is made to Figure 7 The distance between the mating surface 111 and the detection surface 21 in the axial direction of the mating hole 12 is b, where b ≤ 0.35 mm. For example, the value of b can be 0.35 mm, 0.32 mm, 0.3 mm, 0.25 mm, 0.2 mm, etc. Setting this distance range between the mating surface 111 and the detection surface 21 in the axial direction of the mating hole 12 can more accurately and quickly screen out abnormal protrusions of the insulating coating 41 on the battery end face 40.
[0045] In some embodiments of the present invention, reference is made to Figures 2-7 The tooling body 10 also includes an annular plate 30, which is connected to the outer periphery of the terminal mating part 11 and is arranged around the terminal mating part 11. The detection part 20 is located on one side of the annular plate 30 in the axial direction and protrudes from the annular plate 30 along the axial direction of the annular plate 30.
[0046] The terminal mating portion 11 fits against the exposed area of the battery end face 40, and its radial dimension is small. An annular plate 30 is provided on the outer periphery of the terminal mating portion 11 and around the terminal mating portion 11 to facilitate the rotational inspection of the driving inspection fixture 1. For example, the rotational inspection of the inspection fixture 1 can be performed manually by holding the annular plate 30.
[0047] In some embodiments of the present invention, reference is made to Figures 3-7 One end of the detection section 20 is connected to the outer peripheral wall of the terminal mating section 11, and the other end of the detection section 20 extends to the outer peripheral edge of the annular plate 30. This allows the detection section 20 to sweep a larger area during the rotation of the tooling body 10, thereby increasing the detection range of the detection section 20. The connection between the detection section 20 and the outer peripheral wall of the terminal mating section 11 ensures the radial length of the detection section 20, so that the insulating coating 41 of the battery end face 40 near the cylindrical edge completely falls within the detection range of the detection section 20.
[0048] In some embodiments of the present invention, the testing fixture 1 is made of plastic. Using plastic for the testing fixture 1 reduces manufacturing difficulty. Furthermore, during the rotational testing process, it prevents the terminal mating portion 11 of the testing fixture 1 from causing wear on the exposed area of the battery end face 40 due to excessive hardness.
[0049] In some embodiments of the present invention, reference is made to Figures 2-7 The inspection fixture 1 is a one-piece molded part. The one-piece molding method can improve the manufacturing efficiency of the inspection fixture 1.
[0050] The method for detecting the insulating coating 41 of the battery end face 40 using the detection fixture 1 of any of the above embodiments according to the present invention includes the following steps: The electrode terminal 42 is inserted into the mating hole 12, so that the detection part 20 is used to mate with the surface of the insulating coating 41. Inserting the electrode terminal 42 into the mating hole 12 allows the mating surface 111 of the detection fixture 1 to fit against the exposed area of the battery end face 40, increasing the contact area between the battery end face 40 and the detection fixture 1, providing stable support for the detection fixture 1, and improving measurement reliability.
[0051] When rotating the inspection fixture 1, if a vibration is felt upon impact from a protrusion or if rotation is impossible, stop and observe to confirm the location of the protrusion. There is a gap between the inspection surface 21 and the mating surface 111 of the inspection unit 20 in the axial direction of the mating hole 12. When an abnormal protrusion exists, it will contact the inspection surface 21, transmitting vibration to the inspection fixture 1 or causing excessive resistance that prevents rotation. In this case, remove the inspection fixture 1 and observe the corresponding position of the inspection unit 20 for confirmation.
[0052] According to the present invention, the detection method of detecting the insulating coating 41 of the battery end face 40 using the detection fixture 1 of any of the above embodiments is to assemble the detection fixture 1 with the battery end face 40 and rotate the detection fixture 1. Based on the magnitude of the resistance or vibration transmitted by the detection part 20 to the fixture body 10, it is possible to quickly and accurately determine whether there are abnormal protrusions on the surface of the insulating coating 41.
[0053] In some embodiments of the present invention, the concentricity of the terminal mating portion 11 and the electrode terminal 42 is less than or equal to 0.02 mm. For example, the concentricity can be 0.02 mm, 0.01 mm, 0.005 mm, or 0.004 mm. Maintaining a high degree of concentricity between the terminal mating portion 11 and the electrode terminal 42 ensures the accuracy of the assembly between the detection fixture 1 and the battery end face 40, and prevents the detection fixture 1 from shifting during rotation, thus avoiding large measurement errors.
[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.
[0055] In the description of this invention, "first feature" and "second feature" may include one or more of the features.
[0056] In the description of this invention, "a plurality of" means two or more.
[0057] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.
[0058] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.
[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0060] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A testing fixture for testing the insulating coating on the end face of a battery, characterized in that, The testing fixture includes: The tooling body includes a terminal mating part, the terminal mating part having a mating hole for accommodating an electrode terminal disposed on the end face of the battery, and the tooling body being rotatable around the electrode terminal; The detection unit is disposed on the main body of the tooling and located on the outer periphery of the terminal mating part. The detection unit is used to mate with the surface of the insulating coating to detect whether there are protrusions on the surface of the insulating coating.
2. The testing fixture according to claim 1, characterized in that, The cross-section of the mating hole is circular; and / or, the mating hole is a through hole.
3. The testing fixture according to claim 1, characterized in that, The terminal mating portion is projected in a circular shape along the axial direction of the mating hole; and / or, the tooling body is projected in a circular shape along the axial direction of the mating hole.
4. The testing fixture according to claim 1, characterized in that, The mating hole includes a main body section and a flared section. The flared section is connected to at least one side of the main body section in the axial direction, and the cross-sectional area of the flared section is larger than the cross-sectional area of the main body section.
5. The testing fixture according to claim 4, characterized in that, In the direction from the main body section to the flared section, the cross-sectional area of the flared section gradually increases.
6. The testing fixture according to claim 1, characterized in that, The detection section extends radially along the mating hole; and / or, the detection section is connected to the outer peripheral wall of the terminal mating section.
7. The testing fixture according to claim 1, characterized in that, The tooling body has a first side and a second side that are axially opposite to each other along the mating hole. The terminal mating part includes a mating surface, and the detection part includes a detection surface. Both the detection surface and the mating surface are located on the first side. The mating surface is located on the side of the detection surface away from the second side. The detection surface is used to be disposed opposite to the surface of the insulating coating. The mating surface is used to fit against the exposed area of the battery end face. The exposed area is not coated with the insulating coating and is located on the outer periphery of the electrode terminal. The insulating coating is located on the outer periphery of the exposed area.
8. The testing fixture according to claim 7, characterized in that, The mating surface is a plane; and / or, the detection surface is a plane.
9. The testing fixture according to claim 7, characterized in that, The distance between the mating surface and the detection surface in the axial direction of the mating hole is b, where b ≤ 0.35 mm.
10. The testing fixture according to any one of claims 1-9, characterized in that, The tooling body also includes an annular plate, which is connected to the outer periphery of the terminal mating part and surrounds the terminal mating part. The detection part is located on one side of the annular plate in the axial direction and protrudes from the annular plate in the axial direction.
11. The testing fixture according to claim 10, characterized in that, One end of the detection part is connected to the outer peripheral wall of the terminal mating part, and the other end of the detection part extends to the outer peripheral edge of the annular plate.
12. The testing fixture according to any one of claims 1-9, characterized in that, The testing fixture is a plastic part; and / or, the testing fixture is a one-piece molded part.
13. A method for detecting the insulating coating on the end face of a battery using the testing fixture according to any one of claims 1-12, characterized in that, include: The electrode terminal is inserted into the mating hole, and the detection part is used to mate with the surface of the insulating coating; Rotate the detection fixture. If there is a vibration feedback from the protrusion or if it cannot be rotated, stop and observe to confirm the location of the protrusion.
14. The detection method according to claim 13, characterized in that, The concentricity between the terminal mating part and the electrode terminal is less than or equal to 0.02 mm.