CN210639117U - Micro-resistance spot welding quality detection device - Google Patents
Micro-resistance spot welding quality detection device Download PDFInfo
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- CN210639117U CN210639117U CN201921219545.6U CN201921219545U CN210639117U CN 210639117 U CN210639117 U CN 210639117U CN 201921219545 U CN201921219545 U CN 201921219545U CN 210639117 U CN210639117 U CN 210639117U
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Abstract
The utility model relates to a little resistance spot welding quality detection device belongs to miniature resistance spot welding field. The filament of the non-contact heating module is arranged on the electronic part of the flash lamp, the convex lens I is arranged between the filament and the optical integrating sphere, and the optical integrating sphere is fixed in the shell of the non-contact heating module; the light source performance conditioning module shell is fixedly connected with the non-contact heating module shell, and the convex lens II and the concave lens jointly form a light source performance conditioning module and are respectively fixed in the light source performance conditioning module shell; the micro laser sights I and II are fixed in front of the light source performance conditioning module shell and connected with the PCI controller; the micro-resistance spot welding joint on the battery is positioned in the visual field range of the infrared detector, the infrared detector and the non-contact heating module shell are connected with the industrial host through the PCI controller, and the industrial host is connected with the industrial display. Has the advantages that: the nondestructive testing of the micro-resistance spot welding quality is realized for the first time, the testing efficiency is high, the use is convenient, and the practicability is strong.
Description
Technical Field
The utility model relates to a welding field, in particular to miniature resistance spot welding field indicates a little resistance spot welding quality detection device especially.
Background
The micro resistance spot welding technology is widely applied to the manufacturing processes of battery packages, medical instruments, electronic devices and the like, and the requirement on the quality of the micro resistance spot welding is continuously improved along with the development of the intelligent technology. The series-parallel connection of lithium batteries in the new energy automobile power battery pack mostly adopts a micro resistance spot welding connection mode, and the joint quality plays an important role in the stability and the safety of the power battery pack. Micro-resistance spot welding is a main connection mode of series and parallel connection of lithium batteries, and a reliable quality detection means is lacked all the time.
At present, the quality detection of the micro-resistance spot welding of the power battery is a manual detection means, and a mode of picking and shifting a bus bar is generally adopted to check whether a micro-resistance spot welding joint is in a false welding state. However, the quality inspector is easy to fatigue and miss-detection of spot-welded joints when working continuously. This method is not only inefficient, but also fails to provide a scientific and quantitative test of the weld quality. Therefore, the method has important practical significance for realizing the online detection of the micro spot welding quality by a nondestructive detection means.
At present, the conventional resistance spot welding quality detection modes comprise ultrasonic detection, ray detection and the like, and particularly, the ultrasonic detection has a good application effect in the conventional spot welding detection. Ray detection is generally used for detecting aluminum alloy materials, the detection efficiency is high, but due to the complexity of the internal tissue structure of the spot welding joint, the detection effect is not ideal.
The ultrasonic nondestructive testing means has not been satisfactory in terms of thin and ultrathin parts, and the thickness of the test object is closely related to the performance of the ultrasonic probe. The ultrasonic probe is generally required to have higher transmitting frequency and narrower waveform in the thin part detection, is limited to the prior technical means, and cannot meet the micro-resistance spot welding quality detection of the workpiece with the thickness less than 0.3 mm.
In addition, the welding time of the micro spot welding applied to the power battery packaging is short, the welding lasts for 2-3 milliseconds generally, and the ultrasonic online detection is difficult due to the high welding efficiency. Therefore, the existing spot welding joint quality detection mode is difficult to meet the requirements of lithium battery micro-resistance spot welding production, and a new detection mode needs to be proposed urgently.
Disclosure of Invention
An object of the utility model is to provide a little resistance spot welding quality detection device has solved the technical problem that the miniature spot welding quality that prior art exists detected. The utility model relates to an utilize initiative infrared detection mode that non-contact heating module and infrared detection instrument combined together, the little resistance spot welding connects under the condition of the heating of the invariable heat source power of non-contact, detects its change image of joint temperature field along with time, utilizes nugget interval temperature sum to establish spot welding joint quality grade and assesses the model.
The above object of the utility model is realized through following technical scheme:
the micro-resistance spot welding quality detection device comprises a flash lamp electronic part 2, a filament 3, a convex lens I4 and an optical integrating sphere 5 which jointly form a non-contact heating module and are arranged in a non-contact heating module shell 1, wherein the filament 3 is arranged on the flash lamp electronic part 2, the convex lens I4 is arranged between the filament 3 and the optical integrating sphere 5, and the optical integrating sphere 5 is fixed in the non-contact heating module shell 1 through a support; the light source performance conditioning module shell 8 is fixedly connected with the non-contact heating module shell 1, and the convex lens II 6 and the concave lens 7 jointly form a light source performance conditioning module and are respectively fixed in the light source performance conditioning module shell 8; the micro laser sighting device I9.1 and the micro laser sighting device II 9.2 are fixed in front of the light source performance conditioning module shell 8 and connected with the PCI controller 12; the micro resistance spot welding joint on the battery 10 is positioned in the visual field range of the infrared detector 11, the infrared detector 11 and the non-contact heating module shell 1 are connected with an industrial host 13 through the PCI controller 12, and the industrial host 13 is connected with an industrial display 14.
The micro laser sighting device I9.1 and the micro laser sighting device II 9.2 emit low-power laser to position and aim the micro-resistance spot welding joint on the battery 10, and the heating position of the non-contact heating module is ensured to aim the spot welding joint.
The non-contact heating module generates uniform parallel light with high power;
the position of the optical integrating sphere 5 is determined according to the following formula:
wherein the focal length of the convex lens I4 is f0Distance from filament 3 to convex lens I4L, the distance from the convex lens I4 to the optical integrating sphere 5 is l0。
The area of the micro-resistance spot welding joint to be heated is matched with the spot size of parallel light, the light source density and the heating time, and the radius of a heating surface of the light source is determined by the following formula:
wherein the focal length of the convex lens II 6 is f1The focal length of the concave lens 7 is f2Distance l between optical integrating sphere 5 and convex lens II 61The distance between the convex lens II 6 and the concave lens 7 is l2The size of the clear aperture of the convex lens II 6 is y1Heating radius y2。
The outer detection module 11 is a short wave detector.
The beneficial effects of the utility model reside in that: the ultrasonic detection scheme applied to the conventional resistance spot welding quality cannot be applied to the detection of the ultra-thin plate spot welding quality, but the existing infrared detection device applied to welding individually is only limited to the existence of welding missing of the thick plate welding seam of arc welding, because the heat conduction model of the thick plate welding seam welded in the workpiece has obvious difference, and qualitative and quantitative detection does not exist. The heat radiation of the ultrathin plate in the air is fast, the micro-resistance spot welding has a plastic ring area, the upper and lower workpieces in the area are in close contact, the heat transfer speed is influenced by the nugget cross section together, and the detection on whether the cold welding is carried out is more difficult, so that the detection problem of the cold welding of the micro-electron spot welding and the nugget diameter is not effectively solved all the time. The utility model discloses realized the effective detection of little resistance spot welding quality for the first time, solved little resistance spot welding joint quality because of the work piece is too thin and the problem that can't detect, provide effectual solution for the little resistance spot welding joint quality detection of lithium cell trade, the practicality is strong.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
FIG. 1 is a schematic structural view of a micro-resistance spot-welded joint quality detection system of the present invention;
fig. 2 is a schematic diagram of the thermal excitation structure of the present invention.
In the figure: 1. a non-contact heating module housing; 2. flash lamp electronics; 3. a filament; 4. a convex lens I; 5. an optical integrating sphere; 6. a convex lens II; 7. a concave lens; 8. a light source conditioning module; 9.1, a miniature laser sighting device I; 9.2, a miniature laser sighting device II; 10. a battery; 11. an infrared detector; 12. a PCI controller; 13. an industrial host; 14. an industrial display.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, the micro-resistance spot welding quality single-sided infrared detection system of the present invention comprises a non-contact heating module housing 1, a flash lamp electronic component 2, a filament 3, a convex lens i 4, an optical integrating sphere 5, a convex lens ii 6, a concave lens 7, a light source performance conditioning module housing 8, a micro laser sight i 9.1, a micro laser sight ii 9.2, a battery 10, an infrared detector 11, a PCI controller 12, an industrial host 13, and an industrial display 14, the flash lamp electronic part 2, the filament 3, the convex lens I4 and the optical integrating sphere 5 form a non-contact heating module together, the filament 3 is arranged on a flash lamp electronic part 2, a convex lens I4 is arranged between the filament 3 and an optical integrating sphere 5, and the optical integrating sphere 5 is fixed in the non-contact heating module shell 1 through a support; the light source performance conditioning module shell 8 is fixedly connected with the non-contact heating module shell 1, and the convex lens II 6 and the concave lens 7 jointly form a light source performance conditioning module and are respectively fixed in the light source performance conditioning module shell 8; the micro laser sighting device I9.1 and the micro laser sighting device II 9.2 are fixed in front of the light source performance conditioning module shell 8 and connected with the PCI controller 12; the micro resistance spot welding joint on the battery 10 is positioned in the visual field range of the infrared detector 11, the infrared detector 11 and the non-contact heating module shell 1 are connected with an industrial host 13 through the PCI controller 12, and the industrial host 13 is connected with an industrial display 14.
The micro laser sighting device I9.1 and the micro laser sighting device II 9.2 emit low-power laser to position and aim the micro-resistance spot welding joint on the battery 10, and the heating position of the non-contact heating module is ensured to aim the spot welding joint.
The non-contact heating module generates high-power uniform parallel light, and controls heating time according to the detected thickness of the micro-resistance spot welding plate so as to obtain the optimal detection temperature;
the position of the optical integrating sphere 5 is determined according to the following formula:
wherein the focal length of the convex lens I4 is f0The distance from the filament 3 to the convex lens I4 is l, and the distance from the convex lens I4 to the optical integrating sphere 5 is l0。
The area of the micro-resistance spot welding joint to be heated is matched with the spot size of parallel light, the light source density and the heating time, and the radius of a heating surface of the light source is determined by the following formula:
wherein the focal length of the convex lens II 6 is f1The focal length of the concave lens 7 is f2Distance l between optical integrating sphere 5 and convex lens II 61The distance between the convex lens II 6 and the concave lens 7 is l2The size of the clear aperture of the convex lens II 6 is y1Heating radius y2。
The external detection module 11 is a short-wave detector, a thermal light source of the non-contact heating module irradiates on a micro-resistance spot welding joint of the battery 10, the micro-resistance spot welding joint is heated for a short time, and the infrared detector 11 starts to work after the irradiation of the light source is finished in order to prevent the infrared detector from being damaged by high-power strong light.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a little resistance spot welding quality detection device which characterized in that: the heating device comprises a flash lamp electronic part (2), a filament (3), a convex lens I (4) and an optical integrating sphere (5), wherein the flash lamp electronic part (2), the filament (3), the convex lens I (4) and the optical integrating sphere (5) jointly form a non-contact heating module and are arranged in a non-contact heating module shell (1), the filament (3) is installed on the flash lamp electronic part (2), the convex lens I (4) is arranged between the filament (3) and the optical integrating sphere (5), and the optical integrating sphere (5) is fixed in the non-contact heating module shell (1) through; the light source performance conditioning module shell (8) is fixedly connected with the non-contact heating module shell (1), and the convex lens II (6) and the concave lens (7) jointly form the light source performance conditioning module and are respectively fixed in the light source performance conditioning module shell (8); the micro laser sighting device I (9.1) and the micro laser sighting device II (9.2) are fixed in front of the light source performance conditioning module shell (8) and connected with the PCI controller (12); the micro-resistance spot welding joint on the battery (10) is positioned in the visual field range of the infrared detector (11), the infrared detector (11) and the non-contact heating module shell (1) are connected with an industrial host (13) through a PCI controller (12), and the industrial host (13) is connected with an industrial display (14).
2. The micro-resistance spot welding quality detection device according to claim 1, characterized in that: the micro laser sighting device I (9.1) and the micro laser sighting device II (9.2) emit low-power laser to position and aim the micro-resistance spot welding joint on the battery (10).
3. The micro-resistance spot welding quality detection device according to claim 1, characterized in that: the non-contact heating module generates uniform parallel light;
the position of the optical integrating sphere (5) is determined according to the following formula:
wherein the focal length of the convex lens I (4) is f0The distance between the filament (3) and the convex lens I (4) is l, and the distance between the convex lens I (4) and the optical integrating sphere (5) is l0。
4. The micro-resistance spot welding quality detection device according to claim 1, characterized in that: the area of the micro-resistance spot welding joint to be heated is matched with the spot size of parallel light, the light source density and the heating time, and the radius of a heating surface of the light source is determined by the following formula:
wherein the focal length of the convex lens II (6) is f1The focal length of the concave lens (7) is f2Distance l between optical integrating sphere (5) and convex lens II (6)1The distance between the convex lens II (6) and the concave lens (7) is l2The size of the clear aperture of the convex lens II (6) is y1Heating radius y2。
5. The micro-resistance spot welding quality detection device according to claim 1, characterized in that: the infrared detector (11) is a short wave detector.
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| CN201921219545.6U CN210639117U (en) | 2019-07-31 | 2019-07-31 | Micro-resistance spot welding quality detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243866A (en) * | 2019-07-31 | 2019-09-17 | 龙岩学院 | MEMS technology quality detecting system and detection method |
| CN112198192A (en) * | 2020-09-07 | 2021-01-08 | 江苏理工学院 | Infrared image detection device and detection method for fan welding assembly |
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2019
- 2019-07-31 CN CN201921219545.6U patent/CN210639117U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243866A (en) * | 2019-07-31 | 2019-09-17 | 龙岩学院 | MEMS technology quality detecting system and detection method |
| CN110243866B (en) * | 2019-07-31 | 2024-01-16 | 龙岩学院 | Micro-resistance spot welding quality detection system and detection method |
| CN112198192A (en) * | 2020-09-07 | 2021-01-08 | 江苏理工学院 | Infrared image detection device and detection method for fan welding assembly |
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