Optical detection system for battery pole piece detection
Through the optical detection system integrating multi-angle detection and automatic zoom lens, the problems of low efficiency, low accuracy and high cost of battery pole detection are solved, and efficient and low-cost multi-item detection is achieved.
Patent Information
- Application Number
- CN202422261845.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The existing battery pole detection technology is inefficient, low accuracy, high cost, and a single inspection project, and cannot be compatible with multiple defects and size detection.
It adopts an optical detection system, including a mounting frame, multiple lens groups and light source components, to achieve fast focus and multi-angle detection, integrate defect and size detection functions, use sliding modules and automatic zoom lens groups, and is compatible with multi-model pole chips.
It improves detection efficiency and accuracy, reduces costs, realizes the integration of multi-item inspection, has strong compatibility, and can detect defects and appearance dimensions at the same time.
Smart Images
Figure CN223077615U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of measurement, in particular to an optical detection system for battery pole piece detection. Background Art
[0002] With the continuous development of the new energy battery industry, the requirements for battery safety and quality detection are getting higher and higher, and the quality of battery pole pieces is of utmost importance. At present, for the detection of edge defects and size control of battery pole pieces, the common methods are manual detection with a microscope and detection with some semi-automatic imaging equipment. The defects of the pole piece may appear in the cutting plane direction and the plane direction, and at the same time, the pole ear side or multiple sides need to be detected. The current detection process is as follows: manual sampling on the production line. When multiple sides need to be detected, samples at different detection positions need to be taken separately, cut into small pole pieces, placed and clamped in a fixture; manually move the sample, find and adjust the focus in the microscope to be clear; slowly move the sample, manually use the microscope to find defects, and manually record the defect data; change the direction of the sample and repeat the above operations; change the detection side, such as the ceramic area or the pole ear area, and repeat the detection process again; replace the imaging equipment for size measurement, and re-select a complete pole piece for size detection.
[0003] The disadvantages of the current detection technology include: the detection efficiency is too low, and manual detection cannot meet the demand for production capacity growth. The detection accuracy is relatively low, and there are great misjudgments and missed judgments in manual detection, which has a great impact on safety and quality. The detection cost is high, and different instruments need to be replaced for defect detection and size detection. The detection items are single, and items affecting the quality of the pole piece, such as molten beads, heat affected zones, bubbles, and platinum leakage in the ceramic pole ear area on the surface of the pole piece, cannot be detected compatibly. The detection magnification is fixed or manual zoom adjustment is required, and the imaging effect is poor.
[0004] In view of this, it is necessary to develop a new battery pole piece measurement system to solve the defects and disadvantages of the current measurement technology, such as low detection efficiency, low detection accuracy, and single detection items. Summary of the Invention
[0005] The purpose of the utility model is to provide an optical detection system for battery pole piece detection, which can realize the functions of defect detection and large-size outer shape detection for battery pole pieces. The first edge inspection lens group and the second edge inspection lens group can quickly obtain the edge trajectory point cloud of the battery pole piece, realize quick focusing, and improve the detection efficiency and accuracy.
[0006] To this end, the present utility model provides an optical detection system for detecting battery electrodes, including a mounting bracket, on which a first edge-following lens group, a second edge-following lens group, and a first auto-focusing lens group are mounted. The orientations of the first edge-following lens group and the second edge-following lens group are perpendicular to each other, and the foci of the first edge-following lens group and the second edge-following lens group coincide. A sliding module, which includes a vertical slide rail mounted on the mounting bracket. A second auto-focusing lens group that can slide is provided on the vertical slide rail. The orientations of the first auto-focusing lens group and the second auto-focusing lens group are perpendicular to each other.
[0007] Preferably, the mounting bracket includes a first mounting plate, a second mounting plate is vertically provided on the top of the first mounting plate, and a first mounting member for mounting the first edge-following lens group is provided on the side surface of the second mounting plate.
[0008] Preferably, a first light source bracket is provided on the side surface of the second mounting plate, and a first light source is mounted on the first light source bracket. The first light source is used to provide light irradiation for the first edge-following lens group.
[0009] Preferably, the second mounting plate is connected to the vertical slide rail.
[0010] Preferably, a second mounting member for mounting the second edge-following lens group is provided at the bottom of the first mounting plate.
[0011] Preferably, a third mounting member for mounting the first auto-focusing lens group is provided at the bottom of the first mounting plate.
[0012] Preferably, a second light source assembly is provided at the bottom of the first mounting plate. The second light source assembly is used to provide light irradiation for the first auto-focusing lens group.
[0013] Preferably, the second light source assembly includes a second light source bracket mounted at the bottom of the first mounting plate. A second light source is mounted on the second light source bracket. The light emitted by the second light source is inclined downward and the angle with the horizontal line is 45°.
[0014] Preferably, the second light source assembly includes a third light source bracket mounted at the bottom of the third mounting member. A third light source is mounted on the third light source bracket. The light emitted by the third light source is inclined upward and the angle with the horizontal line is 45°.
[0015] Preferably, the intersection point of the light emitted by the second light source and the light emitted by the third light source coincides with the focus of the first auto-focusing lens group.
[0016] Compared with the prior art, the advantages and positive effects of the present utility model are as follows: The present utility model provides an optical detection system for battery pole piece detection, including a mounting frame, on which a first edge detection lens group, a second edge detection lens group, and a first automatic zoom lens group are installed. The orientations of the first edge detection lens group and the second edge detection lens group are perpendicular to each other, and the foci of the first edge detection lens group and the second edge detection lens group coincide; a sliding module, which includes a vertical slide rail installed on the mounting frame; a second automatic zoom lens group slidable on the vertical slide rail; the orientations of the first automatic zoom lens group and the second automatic zoom lens group are perpendicular to each other. The optical detection system of the present utility model can achieve the functions of defect detection and large-size outer shape detection for battery pole pieces. The first edge detection lens group and the second edge detection lens group can quickly obtain the edge trajectory point cloud of the battery pole piece, realize quick focusing and quick positioning of the battery pole piece, and improve the detection efficiency and accuracy. The first automatic zoom lens group and the second automatic zoom lens group can increase the system compatibility and be compatible with the detection of battery pole pieces of multiple models. The optical detection system for battery pole piece detection of the present utility model can break through the high-cost limitation of the combination of image measuring instrument for size detection and microscope for defect detection, integrate the functions into a single measurement system, and greatly reduce the cost.
[0017] After reading the specific embodiments of the present utility model in conjunction with the accompanying drawings, other features and advantages of the present utility model will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of an embodiment of the optical detection system for battery pole piece detection of the present utility model;
[0019] Figure 2 is a schematic structural diagram of an embodiment of the optical detection system for battery pole piece detection of the present utility model;
[0020] Figure 3 is a schematic structural diagram of an embodiment of the first automatic zoom lens group of the present utility model;
[0021] Figure 4 is a schematic structural diagram of an embodiment of the second automatic zoom lens group of the present utility model;
[0022] Figure 5 is a schematic structural diagram of an embodiment of the first edge detection lens group of the present utility model;
[0023] Figure 6 is a schematic structural diagram of an embodiment of the second edge detection lens group of the present utility model
[0024] Figure 7 is a schematic structural diagram of an embodiment of the sliding module of the present utility model;
[0025] Figure 8 is a schematic structural view of an embodiment of the mounting bracket of the present utility model;
[0026] Figure 9 is a schematic structural view of an embodiment of the mounting bracket of the present utility model. Specific embodiments
[0027] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0028] As Figures 1-9 shown, the optical detection system for battery electrode sheet detection of the present utility model includes a mounting bracket 100, on which a first edge detection lens group 10, a second edge detection lens group 20 and a first automatic zoom lens group 30 are mounted. The orientations of the first edge detection lens group 10 and the second edge detection lens group 20 are perpendicular to each other, and the focal points of the first edge detection lens group 10 and the second edge detection lens group 20 coincide; a sliding module 200, which includes a vertical slide rail 201 mounted on the mounting bracket 100; a second automatic zoom lens group 40 slidable on the vertical slide rail 201; the orientations of the first automatic zoom lens group 30 and the second automatic zoom lens group 40 are perpendicular to each other, and the focal points of the first automatic zoom lens group 30 and the second automatic zoom lens group 40 coincide.
[0029] The mounting bracket 100 includes a first mounting plate 101, a second mounting plate 102 is vertically provided on the top of the first mounting plate 101, and a first mounting member for mounting the first edge detection lens group 10 is provided on the side of the second mounting plate 102.
[0030] The first mounting member includes a first connecting plate 111 and a second connecting plate 112 fixedly connected to the side of the second mounting plate 102. The first connecting plate 111 includes a semi-circular docking groove, and the second connecting plate 112 includes a semi-circular docking groove. The semi-circular docking grooves of the first connecting plate 111 and the second connecting plate 112 are docked to form a first circular connecting groove 113, and the first edge detection lens group 10 can be fastened in the first circular connecting groove 113.
[0031] The first connecting plate 111 can be connected to the second connecting plate 112 by bolts, which is convenient for connection and disassembly.
[0032] A first light source bracket 103 is provided on the side of the second mounting plate 102, and a first light source 104 is mounted on the first light source bracket 103. The first light source 104 is used to provide light irradiation for the first edge detection lens group 10.
[0033] The second mounting plate 102 is connected to the vertical slide rail 201. The connection method can be bolt connection or other common methods in the art, and specific limitations are not made here.
[0034] A second mounting member for mounting the second edge inspection lens group 20 is provided at the bottom of the first mounting plate 102.
[0035] The second mounting member includes a third connecting plate 114 and a fourth connecting plate 115 fixedly connected to the bottom of the first mounting plate 102. The third connecting plate 114 includes a semi-circular docking groove, and the fourth connecting plate 115 includes a semi-circular docking groove. The semi-circular docking grooves of the third connecting plate 114 and the fourth connecting plate 115 can be docked to form a second circular connecting groove 116, and the first edge inspection lens group 10 can be fastened within the second circular connecting groove 116.
[0036] The third connecting plate 114 can be bolted to the fourth connecting plate 115, which facilitates connection and disassembly.
[0037] A third mounting member for mounting the first automatic zoom lens group 30 is provided at the bottom of the first mounting plate 101.
[0038] The third mounting member includes a fifth connecting plate 117 vertically mounted at the bottom of the first mounting plate 101, and a sixth connecting plate 118 is vertically provided at the bottom of the fifth connecting plate 117. The first automatic zoom lens group 30 is mounted on the upper surface of the sixth connecting plate 118. The mounting method can be bolt connection or other common mounting methods in the art, and specific limitations are not made here.
[0039] A second light source assembly is provided at the bottom of the first mounting plate 101. The second light source assembly is used to provide light irradiation to the lens of the first automatic zoom lens group 30.
[0040] The second light source assembly includes a second light source bracket 105 mounted at the bottom of the first mounting plate 101. A second light source 106 is mounted on the second light source bracket 105. The light emitted by the second light source 106 is inclined downward and forms an angle of 45° with the horizontal line.
[0041] The second light source assembly further includes a third light source bracket 107 mounted at the bottom of the sixth connecting plate 118. A third light source 108 is mounted on the third light source bracket 107. The light emitted by the third light source 108 is inclined upward and forms an angle of 45° with the horizontal line.
[0042] The intersection point of the light emitted by the second light source 106 and the light emitted by the third light source 108 coincides with the focal point of the first automatic zoom lens 32 of the first automatic zoom lens group 30.
[0043] The sliding module 200 includes a vertical slide rail 201, on which a slidable skateboard 202 is provided. A motor 203 is provided at the top of the vertical slide rail 201, and the motor 203 is used to drive the skateboard 202 to slide along the vertical slide rail 201.
[0044] A seventh connecting plate 204 is fixedly connected to the skateboard 202. The skateboard 202 and the seventh connecting plate 204 are in the same plane, or the skateboard 202 and the seventh connecting plate 204 are parallel. There is no specific limitation here.
[0045] An eighth connecting plate 205 is vertically connected to the seventh connecting plate 204, and the second automatic zoom lens group 40 is fixedly connected to the eighth connecting plate 205. The connection method can be bolt connection or other common fixed connection methods in the art. There is no specific limitation here.
[0046] The first automatic zoom lens group 30 includes a first industrial camera 31 and a first automatic zoom lens 32. The second light source 106 and the third light source 108 are respectively located on the upper and lower sides of the head of the first automatic zoom lens 32. The intersection of the light emitted by the second light source 106 and the light emitted by the third light source 108 coincides with the focal point of the first automatic zoom lens 32 of the first automatic zoom lens group 30. The second light source 106 and the third light source 108 emit white light to irradiate the surface of the battery electrode plate, and the reflected optical fiber passes through the first automatic zoom lens 32, so that the first industrial camera 31 can collect clearer images; the first industrial camera 31 collects the surface image of the battery electrode plate to observe the surface defects and burrs of the battery electrode plate.
[0047] The second automatic zoom lens group 40 includes a second industrial camera 41, a second automatic zoom lens 42, and a second annular light source 43. The second automatic zoom lens group 40 can move up and down to realize the detection of the external dimensions of the battery electrode plate and break through the Z-axis stroke limit. The second annular light source 43 is arranged at the head of the second automatic zoom lens 42. The second annular light source 43 emits white light to irradiate the surface of the battery electrode plate, and the reflected optical fiber passes through the second automatic zoom lens 42, so that the second industrial camera 41 can collect clearer images; the second industrial camera 41 collects the surface image of the battery electrode plate to observe the surface defects and burrs of the battery electrode plate.
[0048] The first edge detection lens group 10 includes a third industrial camera 11 and a first large-field-of-view lens 12. The first light source 104 is located on one side of the head of the first large-field-of-view lens 12. The light emitted by the first light source 104 forms an angle of 45° with the vertical direction. The first light source 104 emits white light to irradiate the surface of the battery electrode plate, and the reflected optical fiber passes through the first large-field-of-view lens 12, so that the third industrial camera 11 can collect clearer images, and the third industrial camera 11 collects the surface image of the battery electrode plate.
[0049] The second edge inspection lens group 20 includes a fourth industrial camera 21 and a second large field of view lens 22, and the fourth industrial camera 21 captures the surface image of the battery electrode sheet.
[0050] The first edge inspection lens group 10 further includes a first mounting portion 13. The first mounting portion 13 is cylindrical. The first mounting portion 13 is clamped and fastened in the first circular connection groove 113. By vertically moving the first edge inspection lens group 10, the vertical distance between the first edge inspection lens group 10 and the battery electrode sheet can be adjusted.
[0051] The second edge inspection lens group 20 further includes a second mounting portion 23. The second mounting portion 23 is cylindrical. The second mounting portion 23 is clamped and fastened in the second circular connection groove 116. By horizontally moving the second edge inspection lens group 20, the horizontal distance between the second edge inspection lens group 20 and the battery electrode sheet can be adjusted.
[0052] By adjusting the vertical distance between the first edge inspection lens group 10 and the battery electrode sheet, and the horizontal distance between the second edge inspection lens group 20 and the battery electrode sheet, the focal points of the first edge inspection lens group 10 and the second edge inspection lens group 20 can be made to coincide and be focused on the surface of the battery electrode sheet, and a surface three-dimensional point cloud can be obtained by synchronously imaging the surface of the battery electrode sheet.
[0053] To implement the defect detection function for the battery electrode sheet: The servo motor 201 drives the second automatic zoom lens group 40 to rise until the focal points of the first automatic zoom lens group 30 and the second automatic zoom lens group 40 coincide (as Figure 1 shown). The overall optical detection system for battery electrode sheet detection moves. During the movement, the first edge inspection lens group 10 and the second edge inspection lens group 20 first take quick photos to obtain the three-dimensional point cloud coordinates of the edge of the battery electrode sheet and position the battery electrode sheet. Then, the first automatic zoom lens group 30 can perform horizontal detection on the surface defects and burrs of the battery electrode sheet, and the second automatic zoom lens group 40 can perform vertical detection on the surface defects and burrs of the battery electrode sheet to evaluate the burrs, molten beads, heat affected zones, breakage and exposed foil, etc. of the battery electrode sheet.
[0054] To implement the large-size shape detection function for the battery electrode sheet: The servo motor 201 drives the second automatic zoom lens group 40 to move down until the second automatic zoom lens 42 is lower than the first automatic zoom lens 32 (as Figure 2 shown), and the second automatic zoom lens 42 can avoid the interference area of the first automatic zoom lens 32. The battery electrode sheet is located directly below the optical detection system for battery electrode sheet detection. The optical detection system for battery electrode sheet detection moves to the shape detection position of the battery electrode sheet. The second automatic zoom lens group 40 can obtain the edge points of the battery electrode sheet to measure the shape size and evaluate the length, width, straightness, parallelism, etc. of the battery electrode sheet.
[0055] The battery electrode sheet detection system is equipped with a three-dimensional moving module (not shown in the figure). The optical detection system for battery electrode sheet detection is arranged on the three-dimensional moving module, and the three-dimensional moving module can drive the optical detection system for battery electrode sheet detection to move in the X, Y, and Z directions. The ways to achieve the movement in the X, Y, and Z directions can be the common ways in this technical field and will not be specifically limited here.
[0056] The optical detection system of the present utility model can implement the functions of defect detection and large-size shape detection for battery electrode sheets. The first edge-following lens group 10 and the second edge-following lens group 20 can quickly obtain the edge trajectory point cloud of the battery electrode sheet, achieve quick focusing and quick positioning of the battery electrode sheet, and improve the detection efficiency and accuracy. The first automatic zoom lens group 30 and the second automatic zoom lens group 40 can increase the system compatibility and be compatible with the detection of battery electrode sheets of multiple models. The optical detection system for battery electrode sheet detection of the present utility model can break through the high-cost limitation of the combination of image analyzer for size detection and microscope for defect detection, integrate the functions into a single measurement system, and greatly reduce the cost.
[0057] The optical detection system for battery electrode sheet detection of the present utility model is a non-contact optical detection system, which is an optical detection system with multi-dimensional cameras and quick automatic focusing proposed for the original burr detection equipment. For burr detection, it can achieve simultaneous detection on the front and side, and at the same time, the automatic zoom is compatible with the quick detection of bead melting, platinum leakage, heat affected zone, penetration and bead width, weld quality, etc. The automatic detection report can be saved throughout the process; for the features such as the shape and size of the electrode sheet, the double Z-axis design can be used to detect the electrode sheet defects in a single system.
[0058] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present utility model.
Claims
1. An optical detection system for battery electrode sheet detection, characterized in that, including a mounting bracket On the mounting bracket, a first edge-inspecting lens group, a second edge-inspecting lens group, and a first auto-zoom lens group are mounted. The orientations of the first edge-inspecting lens group and the second edge-inspecting lens group are perpendicular to each other, and the foci of the first edge-inspecting lens group and the second edge-inspecting lens group coincide; a sliding module, which includes a vertical slide rail mounted on the mounting bracket; a second auto-zoom lens group that is slidable is provided on the vertical slide rail; The orientations of the first auto-zoom lens group and the second auto-zoom lens group are perpendicular to each other.
2. The optical detection system for battery pole piece detection according to claim 1, wherein the mounting bracket includes a first mounting plate, a second mounting plate is vertically provided on the top of the first mounting plate, and a first mounting member for mounting the first edge-inspecting lens group is provided on the side surface of the second mounting plate.
3. The optical detection system for battery pole piece detection according to claim 2, wherein a first light source bracket is provided on the side surface of the second mounting plate, and a first light source is mounted on the first light source bracket. The first light source is used to provide light irradiation for the first edge-inspecting lens group.
4. The optical detection system for battery pole piece detection according to claim 2, wherein the second mounting plate is connected to the vertical slide rail.
5. The optical detection system for battery pole piece detection according to claim 2, wherein a second mounting member for mounting the second edge-inspecting lens group is provided at the bottom of the first mounting plate.
6. The optical detection system for battery pole piece detection according to claim 2, wherein a third mounting member for mounting the first auto-zoom lens group is provided at the bottom of the first mounting plate.
7. The optical detection system for battery pole piece detection according to claim 6, wherein a second light source assembly is provided at the bottom of the first mounting plate. The second light source assembly is used to provide light irradiation for the first auto-zoom lens group.
8. The optical detection system for battery pole piece detection according to claim 7, wherein the second light source assembly includes a second light source bracket mounted at the bottom of the first mounting plate. A second light source is mounted on the second light source bracket. The light emitted by the second light source is inclined downward and the included angle with the horizontal line is 45°.
9. The optical detection system for battery pole piece detection according to claim 8, wherein the second light source assembly includes a third light source bracket mounted at the bottom of the third mounting member. A third light source is mounted on the third light source bracket. The light emitted by the third light source is inclined upward and the included angle with the horizontal line is 45°.
10. The optical detection system for battery pole piece detection according to claim 9, wherein the intersection point of the light emitted by the second light source and the light emitted by the third light source coincides with the focus of the first auto-zoom lens group.