CN-121994701-A - Device and method for detecting appearance of cylindrical cell UV jet printing insulating layer

Abstract

The invention discloses a device and a method for detecting the appearance of a cylindrical cell UV jet printing insulating layer, wherein the device comprises a centering mechanism, the centering mechanism is used for aligning the end faces of the cylindrical cells in the same group, the end face appearance detecting mechanism comprises a clamping jaw module, end face image collecting equipment and a collecting and traversing module used for driving the end face image collecting equipment to move, the cylindrical face appearance detecting mechanism comprises a clamping rotating module and a cylindrical face image collecting equipment arranged above the clamping rotating module, the clamping rotating module is used for clamping and rotating the cylindrical cells, and a controller is used for processing end face images collected by the end face image collecting equipment and cylindrical face images collected by the cylindrical face image collecting equipment and obtaining a cylindrical cell UV jet printing insulating layer appearance detecting result. The invention obviously improves the identification effect and the detection efficiency of the outer appearance detection of the UV jet printing insulating layer of the cylindrical battery cell, reduces the rate of missed detection and false detection, and can meet the requirement of mass automatic production.

Inventors

• YOU LIANGQUAN
• WANG LI
• XIE YUEYUE
• WANG ZIRUI

Assignees

• 合肥国轩高科动力能源有限公司

Dates

Publication Date

20260508

Application Date

20260120

Claims (10)

1. 1. The UV jet printing insulation layer appearance detection device for the cylindrical battery cell is characterized by comprising a controller, and a centering mechanism, an end face appearance detection mechanism and a cylindrical surface appearance detection mechanism which are sequentially arranged; the centering mechanism is used for aligning the end faces of the cylindrical battery cells in the same group; the end face appearance detection mechanism comprises a clamping jaw module, an end face image acquisition device and an acquisition transverse movement module, wherein the end face image acquisition device is arranged corresponding to the clamping jaw module, and the acquisition transverse movement module is used for driving the end face image acquisition device to move; The cylindrical surface appearance detection mechanism comprises a clamping rotation module and cylindrical surface image acquisition equipment arranged above the clamping rotation module, and the clamping rotation module is used for clamping and rotating a cylindrical battery cell; the controller is respectively connected with the end face appearance detection mechanism and the cylindrical surface appearance detection mechanism, and is used for processing the end face image acquired by the end face image acquisition equipment and the cylindrical surface image acquired by the cylindrical surface image acquisition equipment and obtaining the cylindrical cell UV jet printing insulation layer appearance detection result.
2. 2. The device for detecting the appearance of the cylindrical battery cell UV jet printing insulating layer according to claim 1, wherein a magnetic suspension circulating line is arranged between the centering mechanism and the end surface appearance detecting mechanism, and a tray for bearing the cylindrical battery cell is arranged on the magnetic suspension circulating line; the centering mechanism comprises a supporting table arranged on two sides of the magnetic suspension circulating line and a centering plate movably arranged on the supporting table, and a centering groove matched with the cylindrical battery cell in size is formed between the centering plates.
3. 3. The cylindrical cell UV jet printing insulation layer appearance detection device according to claim 1, wherein the end surface appearance detection mechanism further comprises a portal frame, a clamping jaw traversing module and a clamping jaw lifting module; The clamping jaw lifting module is connected with the clamping jaw module and used for driving the clamping jaw module to lift, the clamping jaw sideslip module is connected with the clamping jaw lifting module and used for driving the clamping jaw lifting module to transversely move, and the clamping jaw sideslip module is installed on the portal frame.
4. 4. The device for detecting the appearance of the cylindrical cell UV jet printing insulation layer according to claim 1, wherein the clamping jaw module comprises a supporting frame, a supporting plate connected with the supporting frame and a plurality of profiling flexible clamping jaws arranged on the supporting plate, and the shape of the profiling flexible clamping jaws is matched with that of the cylindrical cell.
5. 5. The cylindrical cell UV jet printing insulation layer appearance detection device according to claim 1, wherein the end face image acquisition equipment comprises an area array camera and a partitioned annular light source which are oppositely arranged, and the area array camera is connected with a fixed focus lens.
6. 6. The cylindrical cell UV jet printing insulation layer appearance detection device according to claim 1, wherein the cylindrical surface appearance detection mechanism further comprises a camera longitudinal movement module and a camera transverse movement module, the camera transverse movement module is connected with the cylindrical surface image acquisition equipment and used for driving the cylindrical surface image acquisition equipment to transversely move, and the camera longitudinal movement module is connected with the camera transverse movement module and used for driving the camera transverse movement module to longitudinally move.
7. 7. The cylindrical cell UV jet printing insulation layer appearance detection device according to claim 1, wherein the cylindrical surface image acquisition equipment comprises a mounting bracket, and a line scanning camera and a phase line array light source which are connected with the mounting bracket, wherein the line scanning camera is connected with a line scanning lens.
8. 8. The cylindrical cell UV jet printing insulation layer appearance detection device according to claim 1, wherein the cylindrical surface appearance detection mechanism further comprises a jacking platform, a plurality of anti-falling brackets are arranged on the upper surface of the jacking platform, and a jacking device is connected to the lower surface of the jacking platform; The clamping and rotating module comprises a first end face fixing plate and a second end face fixing plate which are oppositely arranged on two sides of the jacking platform, one side of the first end face fixing plate is connected with a telescopic cylinder, the other side of the first end face fixing plate is connected with a flexible clamping head, one side of the second end face fixing plate is provided with a flexible limiting head, and the other side of the second end face fixing plate is provided with a rotary driving assembly used for driving the flexible limiting head to rotate.
9. 9. A method for detecting the appearance of a cylindrical cell UV jet printing insulating layer, which is characterized by adopting the device of any one of claims 1-8, and comprising the following steps: aligning the end faces of the cylindrical battery cells in the same group through a centering mechanism; A group of cylindrical battery cells are grabbed by a clamping jaw module of the end surface appearance detection mechanism, and the acquisition transverse moving module drives an end surface image acquisition device to acquire multi-light-area end surface images of each cylindrical battery cell; after the end face image acquisition is finished, the clamping jaw module transfers the cylindrical battery cells to the position of the cylindrical surface appearance detection mechanism, the clamping rotation module clamps a group of cylindrical battery cells and drives the cylindrical battery cells to rotate, and cylindrical surface image acquisition is carried out on each cylindrical battery cell through cylindrical surface image acquisition equipment; The controller acquires the end face image acquired by the end face image acquisition equipment and the cylindrical surface image acquired by the cylindrical surface image acquisition equipment, and processes the end face image and the cylindrical surface image to obtain the appearance detection result of the UV jet printing insulating layer of the cylindrical battery cell.
10. 10. The method for detecting the appearance of the cylindrical cell UV jet printing insulation layer according to claim 9, wherein processing the end face image and the cylindrical surface image comprises: fusion processing is carried out on the multi-light-area end face images to obtain an end face standard image and an end face texture image; Preprocessing a cylindrical surface image to obtain a cylindrical surface regular reflection diagram and a cylindrical surface shape diagram; Performing defect type identification on the end face standard image, the end face texture image, the cylindrical surface regular reflection image and the cylindrical surface shape image by adopting a defect identification algorithm to obtain an end face identification result and a cylindrical surface identification result; And performing logical AND operation on the end face identification result and the cylindrical surface identification result to obtain a cylindrical cell UV jet printing insulation layer appearance detection result.

Description

Device and method for detecting appearance of cylindrical cell UV jet printing insulating layer Technical Field The invention belongs to the technical field of battery production, and particularly relates to an appearance detection device and method for a cylindrical cell UV jet printing insulating layer. Background In the field of new energy, the safety and performance of the power battery are critical, and the electric core is used as a core component of the power battery, and the insulation coating technology of the power battery is also continuously evolving. The technology of UV ink-jet printing (UV ink-jet printing for short) is increasingly focused by battery manufacturers as an emerging cell insulating coating technology, and the technology realizes large-dose and high-precision coating coverage by precisely controlling the injection of UV ink, and has the advantages of low material cost, excellent quality, high efficiency, strong insulativity and the like compared with the traditional PET blue film technology. However, in the process of UV jet printing of the cylindrical battery cell, the surface of the battery cell has appearance defects such as foreign matters, dirt, scratches, shrinkage cavities, white exposure, orange peel, ink accumulation and the like, and particularly for the UV jet printing application of the cylindrical battery, as the polar cylindrical surface has an R angle radian, the explosion-proof valve surface has a groove side wall, the circumferential surface of the battery cell is a curved surface, and the cylindrical battery cell is a non-planar detection scene, which puts higher requirements on appearance detection after jet printing. At present, the manual visual detection has the problems of low detection efficiency, high labor cost and the like, and the requirement of mass automatic production cannot be met. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a device and a method for detecting the appearance of a cylindrical cell UV jet printing insulating layer, which remarkably improve the identification effect and the detection efficiency of the appearance detection of the cylindrical cell UV jet printing insulating layer, reduce the rate of missed detection and false detection and can meet the requirement of mass automatic production. The invention provides the following technical scheme: In a first aspect, a device for detecting the appearance of a cylindrical cell UV jet printing insulating layer is provided, which comprises a controller, a centering mechanism, an end surface appearance detection mechanism and a cylindrical surface appearance detection mechanism, wherein the centering mechanism, the end surface appearance detection mechanism and the cylindrical surface appearance detection mechanism are sequentially arranged; the centering mechanism is used for aligning the end faces of the cylindrical battery cells in the same group; the end face appearance detection mechanism comprises a clamping jaw module, an end face image acquisition device and an acquisition transverse movement module, wherein the end face image acquisition device is arranged corresponding to the clamping jaw module, and the acquisition transverse movement module is used for driving the end face image acquisition device to move; The cylindrical surface appearance detection mechanism comprises a clamping rotation module and cylindrical surface image acquisition equipment arranged above the clamping rotation module, and the clamping rotation module is used for clamping and rotating a cylindrical battery cell; the controller is respectively connected with the end face appearance detection mechanism and the cylindrical surface appearance detection mechanism, and is used for processing the end face image acquired by the end face image acquisition equipment and the cylindrical surface image acquired by the cylindrical surface image acquisition equipment and obtaining the cylindrical cell UV jet printing insulation layer appearance detection result. In the technical scheme, after the end faces of the cylindrical cells in the same group are aligned by the centering mechanism, the cylindrical cells enter the end face appearance detection mechanism, multi-light-area end face image acquisition is carried out on each cylindrical cell through the end face image acquisition equipment, then the cylindrical cells enter the cylindrical face appearance detection mechanism, the cylindrical cells are clamped and driven to rotate through the clamping rotation module, the cylindrical face image acquisition equipment carries out whole cylindrical face image acquisition on each cylindrical cell, so that appearance defect detection on all directions of the end face, the cylindrical face and the like of the cylindrical cell is realized, the problems that the manual detection efficiency is low, single-point light sources are not obvious, the single-point detection imaging is