Height detection device for pole welding bead

Abstract

The utility model relates to a height detection device used for a pole welding bead, comprising a support, a shooting assembly, a detection assembly and a battery cover plate, and the support is connected with the shooting assembly and the detection assembly. The detection assembly comprises a first platform and a second platform which are parallel to each other, and a light source is clamped between the first platform and the second platform; the first platform is provided with two observation holes which are provided for the shooting assembly to shoot. An industrial camera and a lens of the shooting assembly are used for shooting welding beads on the surfaces of two pole columns on a battery cover plate, and the battery cover plate is located on a second platform of the detection assembly. The height detection device for the pole welding bead can solve the problems that due to the lack of a detection scheme for the height of the pole welding bead, the quality of the pole welding bead is difficult to accurately evaluate, the influence of the pole welding bead on a battery cannot be known, the battery is possibly damaged, and safety accidents are caused.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a height detection device for a pole welding bead. Background Art

[0002] Lithium-ion batteries have become the preferred battery for portable electronic products, electric vehicles, and energy storage due to their high capacity density, high specific energy, and long cycle life, and are being used more and more widely. The pole weld plays a key role in lithium-ion batteries. The pole is one of the key components of the battery, connecting the battery cell and the external circuit. The quality of the weld directly affects the performance, safety, and life of the battery. Good pole welds can provide good current conduction, reduce resistance, and ensure the stability and reliability of the battery. Poor pole welds will increase the internal resistance of the battery, reduce performance, and may cause battery overheating, leakage, or short circuit.

[0003] At present, pole welds are often evaluated from three aspects: appearance quality, penetration, and internal defects. The appearance quality of pole welds requires neatness and uniformity, without defects such as cracks, undercuts, and pores. However, the prior art lacks a detection scheme for the height of pole welds, making it difficult to accurately evaluate the quality of pole welds and to know the impact of pole welds on batteries, which may cause battery damage and lead to safety accidents.

[0004] Therefore, the prior art has defects and needs to be improved and developed. Utility Model Content

[0005] The embodiment of the utility model provides a height detection device for a pole weld, which is used to solve the problem in the prior art that due to the lack of a detection scheme for the height of the pole weld, it is difficult to accurately evaluate the quality of the pole weld and it is impossible to know the impact of the pole weld on the battery, which may cause battery damage and trigger a safety accident.

[0006] The utility model embodiment provides a height detection device for a pole weld, comprising a bracket, a shooting assembly, a detection assembly and a battery cover, wherein the bracket is connected with a first connecting member and a second connecting member in sequence from top to bottom; the shooting assembly is fixed on the first connecting member, and the detection assembly is fixed on the second connecting member; the upper surface of the battery cover has a first pole and a second pole, and the surfaces of the first pole and the second pole have welds, the shooting assembly comprises an industrial camera and a lens connected to each other, and the lens faces the detection assembly; the shooting assembly has 2 groups, and the lenses of each group of the shooting assembly are located at the same horizontal height, and the distance between the centers of the two lenses is L, where L is a real number greater than 0; the detection assembly comprises a first platform and a second platform parallel to each other, and the first A light source is sandwiched between the platform and the second platform, and there are two groups of light sources, each group of light sources is flush with the upper surface of the battery plate cover, the central axis of each group of light sources is parallel to the surface of the first pole, and each group of light sources is used to illuminate the surface of the first pole and the surface of the second pole respectively, and the illumination direction is parallel to the surface of the first pole; the battery cover is placed on the second platform, the axis of the first pole is collinear with the axis of one of the lenses, the axis of the second pole is collinear with the axis of the other lens, and the distance from the center of the first pole to the center of the second pole is L; two observation holes are opened on the first platform, one of the observation holes at least exposes the surface of the first pole, and the other observation hole at least exposes the surface of the second pole.

[0007] Furthermore, a guide rail is provided on one side of the bracket connecting the first connecting member and the second connecting member, the first connecting member and the second connecting member are sliders with limiting rods, the first connecting member and the second connecting member are slidably connected to the guide rail, and when the limiting rod is rotated to abut against the guide rail, the limiting rod is used to fix the first connecting member or the second connecting member to the bracket.

[0008] Furthermore, each group of the light sources includes at least 4 laser heads, wherein the axes of the laser heads in one group of the light sources intersect at a first intersection, which is located on the axis of one of the lenses, and the axes of the laser heads in another group of the light sources intersect at a second intersection, which is located on the axis of another lens.

[0009] Furthermore, a clamp is fixed on the second platform, and the battery cover is engaged in the clamp.

[0010] Furthermore, the clamp is a retractable clamp, and when the clamp is compressed, the clamp is used to accommodate the battery cover plate whose distance from the center of the first pole to the center of the second pole is less than L.

[0011] Furthermore, when the first connecting member is a sliding block with a limiting rod, the first connecting member fixes the two groups of the shooting components through a U-shaped member, and the two groups of the shooting components are respectively fixed at two ends of the U-shaped member.

[0012] Furthermore, the U-shaped member is a retractable U-shaped member. When the clamp is a retractable clamp, the U-shaped member is used to change the distance between the centers of the two lenses so that the distance between the centers of the two lenses is equal to the distance from the center of the first pole to the center of the second pole.

[0013] Furthermore, a third connecting member is fixed to a side of the bracket facing away from the guide rail, and when performing multi-station detection, the third connecting member is used to fix the height detection device for the pole weld in the multi-station detection device.

[0014] Furthermore, the industrial camera is an area array camera.

[0015] Beneficial effects:

[0016] It can be seen from the above technical scheme that the utility model provides a height detection device for a pole weld. The battery cover includes a first pole and a second pole. The surface of the first pole is flush with the surface of the second pole. The surface of the first pole and the surface of the second pole are illuminated by a light source, and the weld located on the surface of the first pole and the surface of the second pole can be detected in height. When the height of the weld is higher than the surface of the first pole, the light emitted by the light source is reflected by the part of the weld that is higher than the surface of the first pole, forming reflected light, which is captured by the shooting component. There will be a high-brightness light spot in the picture captured by the shooting component. In addition, since there are two shooting components to shoot the surface of the first pole and the surface of the second pole respectively, the welds on the surface of the first pole and the surface of the second pole can be captured respectively, which can be used to illustrate the height of the welds on the surface of the first pole and the surface of the second pole. Through the picture provided by the shooting component, the poles on the battery cover can be judged in time, indicating the quality of the poles, so as to maintain the battery cover with low-quality poles, thereby protecting the battery and avoiding safety accidents.

[0017] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0018] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are not drawn to scale according to actual reference objects. In the accompanying drawings, each identical or approximately identical component shown in each figure may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:

[0020] Figure 1 This is a structural diagram from a third perspective of a height detection device for a pole weld in an embodiment of the present application.

[0021] Figure 2 It is a left view of a height detection device for a pole weld in an embodiment of the present application.

[0022] Figure 3 This is a structural diagram of the first platform on which the laser head is fixed in an embodiment of the present application.

[0023] Figure 4 This is a structural diagram from another perspective of the first platform on which the laser head is fixed in the embodiment of the present application.

[0024] Figure 5 This is a structural diagram of the second platform with a clamp and a battery cover fixed in an embodiment of the present application.

[0025] Description of Figure Numbers:

[0026] Bracket 1; third connecting member 101; first connecting member 102; second connecting member 103; U-shaped member 2; industrial camera 3; lens 4; first platform 5; light source 6; second platform 7; fixture 8; battery cover 9; first pole 901; second pole 902. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the utility model belongs.

[0028] The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "a", "an" or "the" and other similar words do not indicate a quantitative limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprise" cover the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] In the prior art, due to the lack of a detection scheme for the height of the pole weld, it is difficult to accurately evaluate the quality of the pole weld and to know the impact of the pole weld on the battery, which may cause damage to the battery and lead to safety accidents.

[0030] In view of this, the embodiment of the utility model provides a height detection device for a pole welding bead, referring to Figure 1-2 , including a bracket 1, a shooting component, a detection component and a battery cover 9, the bracket 1 is connected with a first connector 102 and a second connector 103 from top to bottom; the shooting component is fixed on the first connector 102, and the detection component is fixed on the second connector 103; the upper surface of the battery cover 9 has a first pole 901 and a second pole 902, the surfaces of the first pole 901 and the second pole 902 are flush and have welds; the shooting component includes an industrial camera 3 and a lens 4 connected to each other, and the lens 4 faces the detection component; there are 2 groups of shooting components, and the lenses 4 of each group of shooting components are located at the same horizontal height, and the distance between the centers of the two lenses 4 is L, where L is a real number greater than 0. Reference Figure 1-2 The detection assembly includes a first platform 5 and a second platform 7 parallel to each other, referring to Figure 3-4 A light source 6 is sandwiched between the first platform 5 and the second platform 7. There are two groups of light sources 6. Each group of light sources 6 is flush with the upper surface of the battery panel cover 9. The central axis of each group of light sources 6 is parallel to the surface of the first pole 901. Each group of light sources 6 is used to illuminate the surface of the first pole 901 and the surface of the second pole 902 respectively, and the irradiation direction is parallel to the surface of the first pole 901. Figure 5The battery cover 9 is placed on the second platform 7, the axis of the first pole 901 is collinear with the axis of one of the lenses 4, the axis of the second pole 902 is collinear with the axis of the other lens 4, and the distance from the center of the first pole 901 to the center of the second pole 902 is L. Two observation holes are provided on the first platform 5, one of which at least exposes the surface of the first pole 901, and the other of which at least exposes the surface of the second pole 902.

[0031] The light source 6 is sandwiched between the first platform 5 and the second platform 7. After the light emitted by the light source 6 passes through the first platform 5 and the second platform 7, the light can illuminate the surface of the first pole 901 and the second pole 902 in parallel, and the weld bead located on the surface of the first pole 901 and the surface of the second pole 902 can be detected in height. When the height of the weld bead is higher than the surface of the first pole 901, the light emitted by the light source 6 is reflected by the part of the weld bead that is higher than the surface of the first pole 901, forming reflected light, which is captured by the shooting component, and there will be a high-brightness light spot in the picture captured by the shooting component. The light sources 6 in each group of light sources 6 are electrically connected and powered by an external power supply.

[0032] In some embodiments, a guide rail is provided on one side of the bracket 1 connecting the first connecting member 102 and the second connecting member 103. The first connecting member 102 and the second connecting member 103 are sliders with limiting rods. The first connecting member 102 and the second connecting member 103 are slidably connected to the guide rail. When the limiting rod is rotated to abut against the guide rail, the limiting rod is used to fix the first connecting member 102 or the second connecting member 103 on the bracket 1.

[0033] By designing the guide rail and the slider, the height difference between the shooting component and the detection component is changed, so as to adapt to different battery covers 9 for detection and different light sources 6 for reflection, ensuring that the weld can always be detected and the weld height can be reflected.

[0034] In some embodiments, each group of light sources 6 includes at least 4 laser heads, wherein the axes of the laser heads in one group of light sources 6 intersect at a first intersection, which is located on the axis of one of the lenses 4, and the axes of the laser heads in another group of light sources 6 intersect at a second intersection, which is located on the axis of another lens 4.

[0035] Reference Figure 3-4, each group of light sources 6 is designed with 4 laser heads, and the laser emitted by each laser head is located at the same horizontal plane and higher than the surface of the first pole 901. When the surface height of the first pole 901 is different, there will be a height difference on the surface of the first pole 901, so that different results will be obtained when the light source 6 irradiates in different directions on the same horizontal plane. Therefore, 4 laser heads are designed for irradiation to increase the irradiation angle and reduce errors. In some embodiments, an annular light source 6 is also used for irradiation, and the laser heads are distributed in a circle to achieve all-round irradiation on the same horizontal plane, and the detection accuracy is higher.

[0036] In some embodiments, a clamp 8 is fixed on the second platform 7 , and the battery cover 9 is engaged in the clamp 8 .

[0037] The battery cover plate 9 is engaged in the fixture 8 to directly fix the battery cover plate 9, thereby preventing the battery cover plate 9 from sliding off during the detection process, avoiding inaccurate detection results, and improving the detection accuracy of a device for detecting the plane height of a pole weld.

[0038] In some embodiments, the clamp 8 is a retractable clamp, and when the clamp 8 is compressed, the clamp 8 is used to accommodate a battery cover 9 whose distance from the center of the first pole 901 to the center of the second pole 902 is less than L.

[0039] By designing a retractable clamp to clamp the battery cover 9, not only can the battery cover 9 be prevented from sliding to cause inaccurate detection, but battery covers 9 of different sizes can also be clamped for detection, thereby improving the scope of application of a device for detecting the plane height of a pole weld.

[0040] In some embodiments, when the first connecting member 102 is a slider with a limiting rod, the first connecting member 102 fixes two groups of shooting components through the U-shaped member 2, and the two groups of shooting components are respectively fixed at two ends of the U-shaped member 2.

[0041] By designing the U-shaped member 2, the distance between the two lenses 4 can be adjusted to adapt to the detection of battery cover plates 9 of different sizes, thereby improving the application range of a device for detecting the plane height of a pole weld.

[0042] In some embodiments, the U-shaped member 2 is a retractable U-shaped member. When the clamp 8 is a retractable clamp, the U-shaped member 2 is used to change the distance between the centers of the two lenses 4 so that the distance between the centers of the two lenses 4 is equal to the distance from the center of the first pole 901 to the center of the second pole 902.

[0043] During the entire detection process, the distance between the centers of the two lenses 4 is equal to the distance from the center of the first pole 901 to the center of the second pole 902. When the weld is higher than the surface of the first pole 901, the lens 4 can successfully capture the reflected light that enters the lens 4 vertically, and the obtained high-brightness light spot is more accurate and clear.

[0044] In some embodiments, a third connecting member 101 is fixed to the side of the bracket 1 facing away from the guide rail. When performing multi-station detection, the third connecting member 101 is used to fix a height detection device for a pole weld in a multi-station detection device.

[0045] In actual production, the battery cover plate 9 needs to undergo multiple and multiple tests before it can be delivered, so it is necessary to design a multi-station monitoring device to form a test line, on which different product tests are performed sequentially, in turn, or repeatedly. Therefore, the third connector 101 is designed to fix a height detection device for the pole weld in the multi-station detection device, so that it can provide one of the process tests in actual production, thereby obtaining a better product.

[0046] In some embodiments, the industrial camera 3 is an area array camera.

[0047] Area array cameras are cameras that collect images in units of surfaces, can obtain a complete target image at one time, and can collect images in a timely manner. Using area array cameras can better detect welds and improve the accuracy of weld height detection.

[0048] In some embodiments, the lens 4 can be replaced according to actual needs. After the lens 4 is replaced, the distance from the lens 4 to the upper surface of the battery cover 9 needs to be adjusted to obtain the closest light spot effect. When the lens 4 is selected as the CST-B2514-5M model, the distance from the lens 4 to the upper surface of the battery cover 9 is 150 mm.

[0049] In summary, the utility model provides a height detection device for a pole weld, the battery cover 9 includes a first pole 901 and a second pole 902, the surface of the first pole 901 is flush with the surface of the second pole 902, the surface of the first pole 901 and the surface of the second pole 902 are illuminated by the light source 6, and the weld located on the surface of the first pole 901 and the surface of the second pole 902 can be detected in height, when the height of the weld is higher than the surface of the first pole 901, the light emitted by the light source 6 is reflected by the part of the weld that is higher than the surface of the first pole 901, forming reflected light, which is captured by the shooting component, and there will be a high-brightness light spot in the picture captured by the shooting component. In addition, since there are two shooting components to shoot the surface of the first pole 901 and the surface of the second pole 902 respectively, the welds on the surface of the first pole 901 and the surface of the second pole 902 can be captured respectively, which can be used to illustrate the height of the welds on the surface of the first pole 901 and the surface of the second pole 902. Moreover, by designing a retractable U-shaped part and a retractable clamp, it is adapted to battery covers 9 of different sizes, and by designing a third connecting member 101, a device for detecting the plane height of a pole weld can be applied to a detection line to realize multi-station detection. By taking pictures provided by the shooting component, the poles on the battery cover 9 can be identified in time to indicate the quality of the poles, thereby maintaining the battery cover 9 with low-quality poles, thereby protecting the battery and avoiding safety accidents.

[0050] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A device for detecting the height of a pole weld, comprising a bracket, a shooting assembly, a detection assembly and a battery cover, wherein the bracket is sequentially connected with a first connector and a second connector from top to bottom; the shooting assembly is fixed on the first connector, and the detection assembly is fixed on the second connector; the upper surface of the battery cover has a first pole and a second pole, the surfaces of the first pole and the second pole are flush and both have welds, characterized in that: The shooting component includes an industrial camera and a lens connected to each other, and the lens faces the detection component; there are two groups of shooting components, and the lenses of each group of shooting components are located at the same horizontal height, and the distance between the centers of the two lenses is L, where L is a real number greater than 0; The detection assembly comprises a first platform and a second platform parallel to each other, a light source is sandwiched between the first platform and the second platform, and there are two groups of light sources, each group of light sources is flush with the upper surface of the solar panel cover, the central axis of each group of light sources is parallel to the surface of the first pole, and each group of light sources is used to illuminate the surface of the first pole and the surface of the second pole respectively, and the irradiation direction is parallel to the surface of the first pole; The battery cover is placed on the second platform, the axis of the first pole is collinear with the axis of one of the lenses, the axis of the second pole is collinear with the axis of the other lens, and the distance from the center of the first pole to the center of the second pole is L; Two observation holes are opened on the first platform, one of the observation holes at least exposes the surface of the first pole, and the other observation hole at least exposes the surface of the second pole.

2. A height detection device for a pole weld according to claim 1, characterized in that: A guide rail is provided on one side of the bracket connecting the first connecting member and the second connecting member. The first connecting member and the second connecting member are sliders with limiting rods. The first connecting member and the second connecting member are slidably connected to the guide rail. When the limiting rod is rotated to abut against the guide rail, the limiting rod is used to fix the first connecting member or the second connecting member on the bracket.

3. A height detection device for a pole weld according to claim 2, characterized in that: Each group of the light sources includes at least 4 laser heads, wherein the axes of the laser heads in one group of the light sources intersect at a first intersection point, which is located on the axis of one of the lenses, and the axes of the laser heads in another group of the light sources intersect at a second intersection point, which is located on the axis of another lens.

4. A height detection device for a pole weld according to claim 3, characterized in that: A clamp is fixed on the second platform, and the battery cover is clamped in the clamp.

5. A height detection device for a pole weld according to claim 4, characterized in that: The clamp is a retractable clamp, and when the clamp is compressed, the clamp is used to accommodate the battery cover plate whose distance from the center of the first pole to the center of the second pole is less than L.

6. A height detection device for a pole weld according to claim 5, characterized in that: When the first connecting member is a sliding block with a limiting rod, the first connecting member fixes the two groups of the shooting components through a U-shaped member, and the two groups of the shooting components are respectively fixed at two ends of the U-shaped member.

7. A height detection device for a pole weld according to claim 6, characterized in that: The U-shaped part is a retractable U-shaped part. When the clamp is a retractable clamp, the U-shaped part is used to change the distance between the centers of the two lenses so that the distance between the centers of the two lenses is equal to the distance from the center of the first pole to the center of the second pole.

8. A height detection device for a pole weld according to claim 7, characterized in that: A third connecting member is fixed to the side of the bracket facing away from the guide rail. When performing multi-station detection, the third connecting member is used to fix the height detection device for the pole weld in the multi-station detection device.

9. A height detection device for a pole weld according to claim 1, characterized in that: The industrial camera is an area array camera.

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