Lamination sheet stacking alignment degree detection structure
By opening through holes in the clamping jaws and using an infrared light source and camera to acquire the position information of the positive electrode, separator and negative electrode at the same time, the problems of low detection efficiency and unstable calibration in the prior art are solved, and efficient and accurate detection of stacked alignment is achieved.
Patent Information
- Application Number
- CN202423095390.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing technologies have low efficiency in detecting the alignment of stacked wafers, require multiple calculations and rely on marker point calibration, and are prone to errors in position information due to changes in the position of marker points.
Through holes are made on the clamping claws, and combined with an infrared light source and a camera, the position information of the positive electrode, separator and negative electrode is obtained by taking a picture at once, and the stacking alignment is directly calculated, eliminating the need for marker point calibration.
This improves detection efficiency, avoids multiple calculations and marker calibration errors, and achieves efficient and accurate stacking alignment detection.
Smart Images
Figure CN223512696U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a structure for detecting the alignment of stacked cells. Background Technology
[0002] In the stacking process of soft-pack lithium-ion batteries, a certain number of positive and negative electrode sheets and separators are stacked together in a specific order to form the main body of the battery—the cell. The stacking process is completed on a stacking machine, and the clamping claw device is an important component of the stacking machine. Its function is to press the positive and negative electrode sheets and separator together during the stacking process. In existing technologies, the stacking effect of the positive and negative electrode sheets needs to be detected during the stacking operation. Typically, a white light source is used, with a fixed marker point as the origin. When the negative electrode sheet arrives at the stacking platform and is pressed by the clamping claw, a camera takes a picture. The relative coordinates of the negative electrode sheet and the marker point are calculated to obtain the position information of the negative electrode sheet. Then, after the positive electrode sheet arrives at the stacking platform, the camera takes a picture, and the relative coordinates of the positive electrode sheet, separator edge, and marker point are calculated to obtain the position information of the positive electrode sheet and separator. The correctness of the stacking of the positive and negative electrode sheets is then determined by calculating the positions of the positive and negative electrode sheets and separator. This method of detecting the alignment of the stacked sheets has the following shortcomings:
[0003] 1. The cell packing data needs to be obtained through three calculations, which is too slow;
[0004] 2. Coordinate calculation relies on the position of the marker point. If the position of the marker point changes, the positions of the positive and negative electrodes and the separator must be recalibrated. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a stacking alignment detection structure.
[0006] The objective of this utility model is achieved through the following technical solution:
[0007] A stacking alignment detection structure includes: a stacking platform and battery stacks disposed on the stacking platform. The battery stacks are arranged from top to bottom as a positive electrode, a separator, and a negative electrode. The stacking platform is provided with a clamping claw for pressing the battery stacks. The clamping claw has a through hole that extends through the upper and lower sides of the clamping claw. An infrared light source and an infrared camera are fixed directly above the stacking platform. The infrared light source is positioned directly opposite the through hole, and the infrared camera is positioned with its shooting direction directly opposite the through hole. The infrared camera is used to photograph the battery stacks through the through hole for stacking alignment detection.
[0008] In one embodiment, the side of the stacking platform is provided with a mounting bracket for fixing the infrared light source and the infrared camera, the mounting bracket being used to fix the infrared light source and the infrared camera directly above the through hole.
[0009] In one embodiment, the through hole is formed along the length direction of the pressure claw, and the length of the through hole is 5 mm.
[0010] In one embodiment, the pressure claw includes a clamping part and a connecting part, the clamping part and the connecting part are integrally formed, the clamping part is used to clamp the battery stack, and the connecting part is provided with a screw hole for a bolt to pass through and fix the connecting part to the stacking machine clamping device.
[0011] In one embodiment, a first inclined surface for connection and transition is provided between the upper side of the connecting portion and the pressing portion, and the thickness of the pressing portion is less than the thickness of the connecting portion.
[0012] In one embodiment, a second inclined surface is provided between the connecting portion and the lower side of the clamping portion.
[0013] In one embodiment, the end of the pressing part away from the connecting part is provided with a downwardly inclined third slope, which makes the front end of the pressing part gradually thinner.
[0014] In one embodiment, the front end of the clamping part has a thickness of 1 mm, the connecting part has a thickness of 3 mm, and the thickness of the middle connection position between the clamping part and the connecting part is 1 mm-3 mm.
[0015] In one embodiment, a fourth inclined surface is provided on one outer edge of the front end of the clamping part.
[0016] In one embodiment, all corners of the front end of the clamping part are rounded.
[0017] Compared with the prior art, the present invention has at least the following advantages:
[0018] This invention discloses a stacking alignment detection structure for battery cells. Through holes are created in the clamping claws that press the battery cells together, and an infrared camera captures an image in a single shot. This image contains the positional information of the positive electrode, separator, and negative electrode. Through image processing, the coating data of the negative electrode covering the positive electrode and the separator covering the negative electrode can be directly obtained, thus enabling the detection of the battery cell stacking alignment. This improves detection efficiency, eliminates the need for three calculations and detection based on marker points, and removes the marker points. The relative positions of the positive and negative electrodes and the separator are obtained in a single shot, avoiding positional information errors caused by origin anomalies. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.
[0020] Figure 1 This is a schematic diagram of a stacked alignment detection structure provided by the present invention;
[0021] Figure 2 This is a schematic diagram of the pressure claw in a stacking alignment detection structure provided by this utility model.
[0022] Figure descriptions: 10, stacking platform; 20, battery stacking; 30, clamping claw; 301, through hole; 302, first inclined surface; 303, second inclined surface; 304, third inclined surface; 305, fourth inclined surface; 31, clamping part; 32, connecting part; 321, screw hole; 40, infrared light source; 50, infrared camera; 60, fixing frame. Detailed Implementation
[0023] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.
[0024] A stacked alignment detection structure, referring to Figure 1 The system includes a stacking platform 10 and battery stacks 20 disposed on the stacking platform 10. The battery stacks 20, from top to bottom, consist of a positive electrode, a separator, and a negative electrode. The stacking platform 10 is equipped with clamping claws 30 to clamp the battery stacks 20. It should be noted that the batteries are stacked in the following order: negative electrode, separator, positive electrode, separator again. Therefore, in this embodiment, after the negative electrode, separator, and positive electrode are stacked sequentially, the stack alignment of the battery stacks 20 is checked. The clamping claws 30 are connected to a stacking machine clamping device. In this embodiment, the stacking machine clamping device is not shown in the figures; it is prior art and will not be described in detail here.
[0025] Reference Figure 1 and Figure 2 The pressure claw 30 has a through hole 301 that extends through the upper and lower sides of the pressure claw 30. The through hole 301 exposes the position of the battery stack 20 relative to the through hole 301, so as to facilitate the stacking alignment detection of the battery stack 20 relative to the through hole 301.
[0026] Reference Figure 1An infrared light source 40 and an infrared camera 50 are fixed on the stacking platform 10. Both the infrared light source 40 and the infrared camera 50 are fixed directly above the stacking platform 10. The infrared light source 40 is set directly facing the through hole 301, and the shooting direction of the infrared camera 50 is set directly facing the through hole 301. The infrared camera 50 is used to shoot the battery stack 20 through the through hole 301 for stacking alignment detection. It should be noted that the infrared light source 40 illuminates the battery stack 20 through the through hole 301. The infrared light source 40 can penetrate the separator and illuminate the negative electrode sheet at the bottom of the battery stack 20. The infrared camera 50 can capture an image through the through hole 301. This image contains the position information of the positive electrode sheet, the separator, and the negative electrode sheet. Through image processing, the coating data of the negative electrode sheet covering the positive electrode sheet and the separator covering the negative electrode sheet can be directly obtained to detect the stacking alignment of the battery stack 20. This eliminates the need for three calculations and detection based on the position of the marker point, improving production efficiency. The marker point is eliminated, and the relative positions of the positive and negative electrode sheets and the separator are obtained through a single shot, avoiding position information errors caused by origin abnormalities.
[0027] Furthermore, referring to Figure 1 The side of the stacking platform 10 is provided with a fixing bracket 60 for fixing the infrared light source 40 and the infrared camera 50. The fixing bracket 60 is used to fix the infrared light source 40 and the infrared camera 50 directly above the through hole 301.
[0028] Furthermore, referring to Figure 2 The through hole 301 is opened along the length of the pressure claw 30, and the length of the through hole 301 is 5mm. The through hole 301 is elongated, and the four corners of the pressure claw 30 relative to the through hole 301 are rounded.
[0029] Furthermore, referring to Figure 2 The pressure claw 30 includes a pressing part 31 and a connecting part 32. The pressing part 31 and the connecting part 32 are integrally formed. The pressure claw 30 is connected to the pressing device of the stacking machine through the connecting part 32, while the pressing part 31 is used to press the battery stack 20.
[0030] Furthermore, referring to Figure 2 The connecting part 32 is provided with screw holes 321. The stacking machine clamping device can be fixedly connected to the connecting part 32 by bolts passing through the screw holes 321 on the connecting part 32, which facilitates the installation and removal of the clamping claw 30. It should be noted that there are multiple screw holes 321 on the connecting part 32, which are evenly distributed on the connecting part 32 to ensure that the clamping claw 30 is firmly fixed to the stacking machine clamping device.
[0031] Reference Figure 2A first inclined surface 302 for connection transition is provided between the upper side of the connecting part 32 and the pressing part 31. It should be noted that the thickness of the pressing part 31 is less than the thickness of the connecting part 32. Therefore, the first inclined surface 302 is used to transition between the connecting part 32 and the pressing part 31, making the connection between the connecting part 32 and the pressing part 31 smoother.
[0032] Reference Figure 2 A second inclined surface 303 is provided between the lower side of the connecting part 32 and the pressing part 31. The second inclined surface 303 prevents the cell electrode and the separator from being misaligned and stuck between the connecting part 32 and the pressing part 31 during the stacking process.
[0033] Reference Figure 2 The clamping part 31 has a downwardly inclined third slope 304 at the end away from the connecting part 32. The third slope 304 makes the front end of the clamping part 31 gradually thin, thereby reducing the contact area and friction with the battery cell electrode or separator, making it easier to remove the clamping claw 30 during the stacking process. It should be noted that the lower side of the clamping part 31 is flat to clamp the battery cell electrode or separator.
[0034] Furthermore, referring to Figure 2 The front end of the pressing part 31 has a thickness of 1mm, the connecting part 32 has a thickness of 3mm, and the thickness of the middle connection position between the pressing part 31 and the connecting part 32 is 1mm-3mm.
[0035] Reference Figure 2 The outer edge of one side of the front end of the pressing part 31 is provided with a fourth inclined surface 305. The fourth inclined surface 305 can reduce the contact area and friction between the upper side of the pressing part 31 and the battery cell electrode or the separator. After the pressing part 31 presses down on the battery cell electrode, and when the separator is laid on the battery cell electrode, it is convenient for the pressing claw 30 to be removed from between the battery cell electrode and the separator.
[0036] Furthermore, referring to Figure 2 All corners of the front end of the pressing part 31 are rounded so that the positions of the pressing part 31 and the base of the battery cell electrode are both rounded, thereby reducing the phenomenon that the pressing part 31 has sharp edges and burrs that could damage the battery cell electrode.
[0037] In one embodiment, the lower side of the clamping part 31 is provided with a silicone contact part for contacting the battery cell electrode or the separator. Since the clamping claw 30 is made of metal, by providing the silicone contact part on the lower side of the clamping part 31, it can achieve the effect of anti-slip and stable clamping of the battery cell electrode and the separator, and can prevent the separator and the battery cell electrode from misaligning when the clamping part 31 is clamped.
[0038] Furthermore, referring to Figure 2 The surface of the pressure claw 30 is coated with DLC and mirror polished to improve its wear resistance and service life.
[0039] This invention creates through holes 301 on the clamping claws 30 of the battery stack 20 and captures an image in one shot using an infrared camera 50. This image contains the positional information of the positive electrode, separator, and negative electrode. Through image processing, the coating data of the negative electrode covering the positive electrode and the separator covering the negative electrode can be directly obtained, thereby enabling the detection of the stacking alignment of the battery stack 20. This improves the detection efficiency, eliminates the need for three calculations and detection based on the position of marker points, and improves production efficiency. By eliminating marker points and obtaining the relative positions of the positive and negative electrode and separator in one shot, the error in positional information caused by abnormal origin points is avoided.
[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A stacked wafer alignment detection structure, characterized in that, include: A stacking platform (10) and battery stacks (20) disposed on the stacking platform (10). The battery stacks (20) are arranged from top to bottom as a positive electrode, a separator and a negative electrode. The stacking platform (10) is provided with a clamping claw (30) for pressing the battery stacks (20). The clamping claw (30) has a through hole (301) that passes through the upper and lower sides of the clamping claw (30). An infrared light source (40) and an infrared camera (50) are fixed directly above the stacking platform (10). The infrared light source (40) is positioned directly opposite the through hole (301). The infrared camera (50) is positioned with its shooting direction directly opposite the through hole (301). The infrared camera (50) is used to photograph the battery stacks (20) through the through hole (301) for stacking alignment detection.
2. The stack alignment detection structure according to claim 1, characterized in that, The side of the stacking platform (10) is provided with a fixing bracket (60) for fixing the infrared light source (40) and the infrared camera (50). The fixing bracket (60) is used to fix the infrared light source (40) and the infrared camera (50) directly above the through hole (301).
3. The stack alignment detection structure according to claim 1, characterized in that, The through hole (301) is opened along the length direction of the pressure claw (30), and the length of the through hole (301) is 5mm.
4. The stack alignment detection structure according to claim 1, characterized in that, The pressure claw (30) includes a pressing part (31) and a connecting part (32). The pressing part (31) and the connecting part (32) are integrally formed. The pressing part (31) is used to press the battery stack (20). The connecting part (32) is provided with a screw hole (321). The screw hole (321) is used for bolts to pass through and fix the connecting part (32) to the stacking machine pressing device.
5. The stack alignment detection structure according to claim 4, characterized in that, A first inclined surface (302) for connection transition is provided between the upper side of the connecting part (32) and the pressing part (31), and the thickness of the pressing part (31) is less than the thickness of the connecting part (32).
6. The stack alignment detection structure according to claim 5, characterized in that, A second inclined surface (303) is provided between the connecting part (32) and the lower side of the pressing part (31).
7. The stack alignment detection structure according to claim 5, characterized in that, The pressing part (31) has a downwardly inclined third slope (304) at one end away from the connecting part (32), and the third slope (304) makes the front end of the pressing part (31) gradually thin.
8. The stack alignment detection structure according to claim 7, characterized in that, The front end of the pressing part (31) has a thickness of 1 mm, the connecting part (32) has a thickness of 3 mm, and the thickness of the middle connection position between the pressing part (31) and the connecting part (32) is 1 mm to 3 mm.
9. The stack alignment detection structure according to claim 7, characterized in that, The outer edge of one side of the front end of the clamping part (31) is provided with a fourth inclined surface (305).
10. The stack alignment detection structure according to claim 9, characterized in that, The corners of the front end of the pressing part (31) are all rounded.