Laser cutting system
By adopting a laser cutting system in battery production, using photoelectric sensors to detect the position offset of the electrode strip and adjust the laser cutting position, the low quality and scrapping problems caused by the assembly line cutting method are solved, and higher cutting accuracy and efficiency are achieved.
Patent Information
- Application Number
- CN202421555465.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-03
AI Technical Summary
During the battery production process, the assembly line cutting method easily leads to offset the pole position, resulting in inaccurate cutting, low quality of the pole ear, and easy to produce accidents of large amounts of pole scrapping.
A laser cutting system is adopted, including a transmission device, a photoelectric sensor and a laser cutter. The position offset information of the electrode strip is detected through the photoelectric sensor. The controller adjusts the cutting position of the laser cutter based on this information to ensure the accuracy of the cutting.
It improves the accuracy of laser cutting, improves the quality of the Jier, reduces the chance of production accidents of the Jier strip scrap, and improves the Jier cutting efficiency.
Smart Images
Figure CN222932024U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of battery processing, and particularly to a laser cutting system. Background Art
[0002] During the production process of batteries, there is a process of cutting the tab on the electrode sheet to obtain the tab. In order to improve the cutting efficiency of the tab, the electrode sheet is usually cut in a pipeline cutting method to obtain the tab, that is, the transmission of the electrode sheet does not stop. Once the position of the electrode sheet is offset, it may lead to inaccurate cutting and low quality of the tab, such as too high or too low tab height. It can be seen that in the pipeline cutting method, it is easy to cause a large number of production accidents of scrapped electrode sheets. Utility Model Content
[0003] The embodiments of this application disclose a laser cutting system, which can improve the accuracy of laser cutting, thereby improving the quality of the tab.
[0004] The embodiments of this application disclose a laser cutting system, including:
[0005] A transmission device for transmitting the electrode sheet strip;
[0006] An optoelectronic sensor for detecting the position offset information of the electrode sheet strip on the transmission device relative to the central position of the transmission device;
[0007] A laser cutter arranged behind the optoelectronic sensor along the transmission direction of the transmission device;
[0008] A controller connected to the optoelectronic sensor and the laser cutter, and the controller is used to control the laser cutter to cut the electrode sheet strip according to the position offset information to obtain the tab.
[0009] In one embodiment, the laser cutting system further includes a vision detection device, the vision detection device is arranged behind the laser cutter along the transmission direction of the transmission device, and the vision detection device is arranged corresponding to the image acquisition position;
[0010] The vision detection device is connected to the controller and is used to detect the tab parameter information of the tab transmitted to the image acquisition position;
[0011] The controller is further used to control the laser cutter to cut the electrode sheet strip according to the tab parameter information and the position offset information.
[0012] In one embodiment, the laser cutter includes a galvanometer scanner, and the controller is further used to control the galvanometer scanner to rotate when receiving the position offset information, so as to adjust the cutting position of the laser reflected by the galvanometer scanner on the electrode sheet strip.
[0013] In one embodiment, the distance value adjusted each time for the cutting position is a fixed distance value.
[0014] In one embodiment, the conveying device includes a plurality of conveying rollers, the plurality of conveying rollers are arranged at intervals, and the plurality of conveying rollers are all used for conveying the pole piece strip.
[0015] In one embodiment, along the conveying direction, the laser cutter is arranged between two adjacent conveying rollers correspondingly, the conveying roller in front of the laser cutter is the first conveying roller, and the photoelectric sensor is arranged corresponding to the first conveying roller.
[0016] In one embodiment, the photoelectric sensor includes a transmitting end and a receiving end, the transmitting end is arranged corresponding to the first conveying roller, the receiving end is arranged on the first conveying roller, the transmitting end is used for emitting light towards the first conveying roller, and the receiving end is used for receiving the light emitted by the transmitting end.
[0017] In one embodiment, the receiving end is arranged at the central position of the first conveying roller.
[0018] In one embodiment, the light emitted by the transmitting end has a preset width, and the preset width is greater than half of the width of the pole piece strip.
[0019] In one embodiment, the laser cutting system further includes a pole piece deviation rectifying device, the pole piece deviation rectifying device is arranged before the photoelectric sensor along the conveying direction of the conveying device, and the pole piece deviation rectifying device is used for adjusting the position of the pole piece strip on the conveying device.
[0020] In the laser cutting system disclosed in the embodiments of the present application, by setting a photoelectric sensor and arranging the laser cutter after the photoelectric sensor along the conveying direction of the conveying device. When the conveying device conveys the pole piece strip, the photoelectric sensor can detect the position offset information of the pole piece strip on the conveying device relative to the central position of the conveying device, so that the controller can control the laser cutter to make corresponding adjustments according to the position offset information to cut the pole piece strip to obtain pole ears, avoiding the problem of inaccurate cutting caused by the position offset of the pole piece strip, effectively improving the cutting accuracy of the pole piece strip, and further being beneficial to improving the cutting quality of the pole ears and reducing the probability of production accidents of pole piece strip scrapping.
[0021] In addition, the detection speed of the photoelectric sensor is fast, so that the conveying device can convey the pole piece strip at a relatively fast conveying speed, which is beneficial to improving the cutting efficiency of the pole ears. Description of the Drawings
[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.
[0023] Figure 1 is a schematic structural diagram of a laser cutting system disclosed in an embodiment of the present application;
[0024] Figure 2 is a schematic structural diagram of a conveying roller disclosed in an embodiment of the present application;
[0025] Figure 3 is a schematic diagram of a pole piece strip on the conveying roller disclosed in an embodiment of the present application;
[0026] Figure 4 is a schematic structural diagram of another laser cutting system disclosed in an embodiment of the present application;
[0027] Figure 5 is a schematic diagram of a pole piece strip with tabs disclosed in an embodiment of the present application;
[0028] Figure 6 is a schematic diagram of yet another laser cutting system disclosed in an embodiment of the present application. Detailed implementation manners
[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.
[0030] It should be noted that the terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or devices.
[0031] The embodiments of the present application disclose a laser cutting system, which can improve the accuracy of laser cutting, thereby improving the quality of the cut tabs.
[0032] The following will be described in detail in conjunction with the accompanying drawings.
[0033] As Figure 1 shown, Figure 1It is a schematic structural diagram of a laser cutting system disclosed in an embodiment of the present application. The laser cutting system may include a transmission device 110, a photoelectric sensor 120, and a laser cutter 130. Among them, the transmission device 110 is used to transmit the pole piece tape; the photoelectric sensor 120 is used to detect the position offset information of the pole piece tape on the transmission device relative to the central position of the transmission device; the laser cutter 130 is arranged behind the photoelectric sensor along the transmission direction of the transmission device. The controller is connected to the photoelectric sensor 120 and the laser cutter 130, and the controller is used to control the laser cutter 130 to cut the pole piece tape according to the position offset information to obtain pole ears.
[0034] It can be understood that the transmission device 110 can be used to transmit the pole piece tape, and the pole piece tape can refer to the tape of the battery pole piece. The transmission device 110 can correspond to a transmission direction, so that the transmission device 110 can transmit the pole piece tape along the transmission direction.
[0035] Optionally, the transmission device 110 may include a plurality of conveying rollers. The plurality of conveying rollers may be arranged at intervals. The intervals between every two adjacent conveying rollers may be the same or different, and there is no limitation on this. The plurality of conveying rollers are all used to transmit the pole piece tape. Specifically, the pole piece tape can be transmitted along the transmission direction by the rotation of the plurality of conveying rollers. As Figure 1 shown, Figure 1 the direction arrow in
[0036] Generally speaking, when the pole piece tape is transmitted on the conveying roller, the center of the pole piece tape is roughly matched with the central position of the conveying roller, so that the height of the cut pole ear can meet the production requirements. However, since a plurality of conveying rollers are required to convey the pole piece tape, during the conveying process of the pole piece tape, there may be an offset situation, that is, the center of the pole piece tape is offset relative to the central position of the conveying roller. In this case, if cutting continues, it may cause the height of the cut pole ear to be too high or too low. Based on this, in the present application, by setting the photoelectric sensor 120, the photoelectric sensor 120 is used to detect the position offset information of the pole piece tape on the transmission device 110 relative to the central position of the transmission device 110, so that the controller can control the cutting of the laser cutter 130 according to the position offset information.
[0037] It can be understood that the photoelectric sensor 120 can emit light to the pole piece tape on the transmission device 110 and receive the emitted light to convert it into an electrical signal, so as to obtain the position offset information of the pole piece tape relative to the central position of the transmission device 110. It can be understood that compared with the method of determining the position offset information in the related art, such as determining the position offset information by photographing a target image, the method of detecting the position offset information by the photoelectric sensor 120 in the present application is simpler and faster, and can improve the speed of position offset detection.
[0038] Among them, the pole piece strip is located on the transmission device 110. The central position of the transmission device 110 can refer to the position of the center in the direction perpendicular to the transmission direction. For example, Figure 2 as shown Figure 2 is a schematic diagram of a conveying roller disclosed in an embodiment of the present application. The conveying roller 210 can rotate around the rotation axis. The conveying roller 210 can be cylindrical. The rotation axis can be the axis perpendicular to the centers of the top and bottom of the cylinder. The rotation direction can be the transmission direction of the pole piece strip. The direction perpendicular to the transmission direction is the direction of the rotation axis. The central position 211 is the position of the center of the transmission device 110 in the direction of the rotation axis.
[0039] The position offset information of the central position of the transmission device 110 can characterize the position offset of the central position of the pole piece strip relative to the central position of the transmission device 110. The pole piece strip is usually a long strip. The central position of the pole piece strip can refer to the central position of the pole piece strip in its own width direction. For example, Figure 3 as shown Figure 3 is a schematic diagram of a conveying roller and a pole piece strip disclosed in an embodiment of the present application. The pole piece strip 310 is on the conveying roller 210. The width direction of the pole piece strip can be the same as the direction of the rotation axis of the conveying roller 210. The central position 311 is the position of the center of the pole piece strip in the width direction. The position offset information can refer to the position offset between the central position 311 of the pole piece strip 310 and the central position 211 of the conveying roller 210.
[0040] To better explain the relationship between each device, for example, Figure 1 as shown, along the transmission direction, the laser cutter 130 is arranged between two adjacent conveying rollers 210, that is, the laser cutter 130 is between two adjacent conveying rollers 210. The conveying roller 210 in front of the laser cutter is the first conveying roller. The photoelectric sensor 120 is arranged corresponding to the first conveying roller. Specifically, in Figure 1 , the first conveying roller is the conveying roller 210 on the right side of the photoelectric sensor 120.
[0041] In one embodiment, the photoelectric sensor 120 can include a transmitting end and a receiving end. The transmitting end can be arranged corresponding to the first conveying roller. The transmitting end can be located at the position of the photoelectric sensor 120 in Figure 1 . The receiving end can be arranged on the first conveying roller. The transmitting end is used to emit light towards the first conveying roller. The receiving end is used to receive the light emitted by the transmitting end, so as to determine the position offset information according to the difference between the light emitted by the transmitting end and the light received by the receiving end.
[0042] Optionally, the receiving end can be arranged at the central position of the first conveying roller. It can be understood that the position deviation information refers to the position offset of the central position of the pole piece strip 310 relative to the central position of the first conveying roller. Therefore, in order to more conveniently determine the position of the pole piece strip 310, the receiving end can be arranged at the central position of the first conveying roller.
[0043] Optionally, the light emitted by the transmitting end can have a preset width, and the preset width can be greater than half of the width of the pole piece strip 310. Wherein, the preset width can refer to the preset width in the width direction of the pole piece strip 310. When the receiving end is arranged at the central position of the first conveying roller and the preset width is greater than half of the width of the pole piece strip 310, if the pole piece strip 310 has no position offset, the receiving end can receive part of the light emitted by the transmitting end, and the other part of the light is blocked by the pole piece strip 310. If the pole piece strip 310 has a position offset, the other part of the light blocked by the pole piece strip 310 can increase or decrease. Therefore, the part of the light received by the receiving end also decreases or increases accordingly. The photoelectric sensor can determine the position deviation information according to the light received by the receiving end. Since the response speed of the photoelectric sensor is fast and the calculation process is simple, compared with methods such as image detection before cutting, the detection speed of the position offset of the pole piece strip can be improved, and the problem of low production efficiency caused by the slow detection speed affecting the transmission speed of the pole piece strip can be avoided.
[0044] The laser cutter 130 can be arranged behind the photoelectric sensor 120 along the transmission direction of the transmission device, so that the photoelectric sensor can first detect the position deviation information. Then, under the control of the controller, the laser cutter 130 outputs laser according to the position deviation information to cut the pole piece strip to obtain the pole ear. Wherein, the controller can communicate with the photoelectric sensor 120 and the laser cutter 130. For example, the photoelectric sensor 120 can transmit the position deviation information to the controller, and the controller can control the laser output by the laser cutter 130 to be offset according to the received position deviation information. The purpose of controlling the laser output by the laser cutter to be offset here is to compensate for the offset generated by the pole piece strip, cut the pole piece strip to obtain the pole ear, reduce the error of the cutting position of the pole piece strip, thereby improving the accuracy of laser cutting, which is not only beneficial to improving the quality of the cut pole ear, but also beneficial to improving the cutting efficiency.
[0045] In one embodiment, the laser cutting system can further include a vision detection device, such as Figure 4 shown Figure 4It is a schematic diagram of another laser cutting system disclosed in an embodiment of the present application. The vision detection device 140 can be arranged behind the laser cutter 130 along the transmission direction of the transmission device 110. The vision detection device 140 can include a CCD (Charge-coupled device) camera. One or more conveying rollers 110 can be provided between the vision detection device 140 and the laser cutter 130. Figure 4 This is only an example and does not mean that the conveying rollers 110 must be provided between the vision detection device 140 and the laser cutter 130.
[0046] The vision detection device 140 can be connected to a controller. The vision detection device 140 can be used to detect the tab parameter information of the tab transmitted to the image acquisition position. The image acquisition position refers to the position visually aligned by the vision detection device 140, such as the camera focus position of the CCD camera. The image acquisition position is not shown in Figure 4 However, it can be understood that Figure 4 in the image acquisition position can be located on the right side of the vision detection device.
[0047] Among them, the tab is formed after the tabbed strip is cut by the laser cutter. As Figure 5 shown, Figure 5 It is a schematic diagram of a tabbed strip with tabs disclosed in an embodiment of the present application. The transmission direction of the tabbed strip 310 is opposite to the cutting direction of the laser cutter 130. It can be understood that since the tabbed strip 310 is transmitted by the transmission device 110 in the transmission direction, the laser output by the laser cutter 130 on the tabbed strip 310 can achieve cutting in the cutting direction opposite to the transmission direction. The controller can control the laser cutter 130 to move in the width direction of the tabbed strip 310 to obtain the tab 312. The tabbed strip 310 continues to be transmitted by the transmission device 110 in the transmission direction and can reach the image acquisition position. The vision detection device 140 can collect the image of the tab 312 and obtain the tab parameter information of the tab 312 after image analysis.
[0048] The tab parameters information of tab 312 may include but is not limited to the width, angle, height, center position, presence or absence of defects, etc. of tab 312, and there is no limitation on this. Among them, the width of tab 312 refers to the length of tab 312 in the transmission direction, and the height of tab 312 refers to the length of tab 312 in the direction perpendicular to the transmission direction. The vision detection device 140 can transmit the tab parameters information of tab 312 to the controller. The controller can control the laser cutter to cut the tab strip 310 according to the tab parameters information of tab 312 transmitted by the vision detection device 140 and the position offset information transmitted by the photoelectric sensor 120. Optionally, the controller can control the laser cutter 130 to perform the next cut on the tab strip 310 according to the tab parameters information of tab 312 transmitted by the vision detection device 140 and the position offset information transmitted by the photoelectric sensor 120. The next cut may refer to the cut of the next tab that the laser cutter 130 is about to perform.
[0049] In the embodiment of the present application, by arranging the vision detection device 140 behind the laser cutter 130, the limitation of the detection speed of the vision detection device 140 on the transmission speed is avoided. The controller can perform the next cut on the tab strip 310 according to the tab parameters information of tab 312 determined by the current vision detection device 140 and the position offset information determined by the photoelectric sensor 120, and further improve the accuracy of tab cutting without affecting the cutting efficiency of the tab.
[0050] In one embodiment, the laser cutter 130 may include a laser generator and a galvanometer. The laser generator can generate laser, and the laser can reach the galvanometer. The galvanometer reflects the laser to change the emission angle of the laser from the laser cutter 130, thereby changing the cutting position of the laser on the tab strip 310. The controller can control the galvanometer to rotate to adjust the cutting position of the laser reflected by the galvanometer on the tab strip 310 when receiving the position offset information transmitted by the photoelectric sensor 120. Optionally, the controller can also control the galvanometer to rotate to adjust the cutting position of the laser reflected by the galvanometer on the tab strip 310 when receiving the position offset information transmitted by the photoelectric sensor 120 and the tab parameters information of tab 312 transmitted by the vision detection device 140.
[0051] Among them, the controller can control the galvanometer to rotate to adjust the cutting position of the laser reflected by the galvanometer on the tab strip 310, so that the cutting position moves in the width direction of the tab strip 310, and the cutting position is more accurate, so as to improve the quality of the tab, that is, the tab parameters information of the cut tab more conforms to the standard tab parameters information.
[0052] It can be understood that during the movement of the laser in the width direction of the pole piece strip 310, the transmission device 110 does not stop transmitting the pole piece strip. Therefore, the movement of the laser in the width direction of the pole piece strip 310 will cause the cutting trajectory of the laser on the pole piece strip 310 to have an inclined trajectory, which is neither perpendicular nor parallel to the transmission direction. To ensure the quality of each tab, the controller can control the galvanometer to rotate so that the distance value adjusted each time for the cutting position of the laser on the pole piece strip 310 is a fixed distance value, thereby preventing the inclined trajectory from being too long and resulting in too low quality of the tabs due to the existence of the inclined trajectory.
[0053] As Figure 6 shown, Figure 6 FIG. is a schematic diagram of yet another laser cutting system disclosed in an embodiment of the present application. The laser cutting system may further include a pole piece deviation correction device 150. The pole piece deviation correction device 150 is disposed in front of the photoelectric sensor 120 along the transmission direction of the transmission device 110. The pole piece deviation correction device 150 can be used to adjust the position of the pole piece strip 310 on the transmission device 110 to reduce the position offset of the pole piece strip 310. The embodiment of the present application does not limit the pole piece deviation correction device 150, and it can be any deviation correction structure.
[0054] Optionally, the pole piece deviation correction device 150 may include two conveying rollers 110 and a deviation correction sensor 151. The pole piece deviation correction device 150 can control the rotation speeds of the two conveying rollers 110 to be different. Through the speed difference between the two conveying rollers 110, the position of the pole piece strip 310 between the two conveying rollers 110 is adjusted so that the pole piece strip 310 is closer to the central position of the two conveying rollers 110. The deviation correction sensor 151 is used to obtain sensor data during the deviation correction process. The embodiment of the present application does not limit the type and function of the deviation correction sensor.
[0055] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", "ideal embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.
[0056] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.
[0057] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.
Claims
1. A laser cutting system, characterized in that: include: A transmission device, used for transmitting the pole piece strip; A photoelectric sensor, used to detect positional offset information of a pole piece strip on the transmission device relative to a center position of the transmission device; A laser cutter, arranged after the photoelectric sensor along the transmission direction of the transmission device; A controller is connected to the photoelectric sensor and the laser cutter, and the controller is used to control the laser cutter to cut the pole piece strip according to the position offset information to obtain the pole ear.
2. The laser cutting system according to claim 1, characterized in that: The laser cutting system further comprises a visual detection device, which is arranged behind the laser cutter along the transmission direction of the transmission device, and the visual detection device is arranged corresponding to the image acquisition position; The visual detection device is connected to the controller and is used to detect the tab parameter information of the tab transmitted to the image acquisition position; The controller is also used to control the laser cutter to cut the pole piece strip according to the pole lug parameter information and the position offset information.
3. The laser cutting system according to claim 1, characterized in that: The laser cutter includes a galvanometer, and the controller is further used to control the rotation of the galvanometer when receiving the position offset information, so as to adjust the cutting position of the laser reflected by the galvanometer on the pole piece strip.
4. The laser cutting system according to claim 3, characterized in that: The distance value of the cutting position adjusted each time is a fixed distance value.
5. The laser cutting system according to claim 1, characterized in that: The transmission device includes a plurality of conveying rollers, the plurality of conveying rollers are arranged at intervals, and the plurality of conveying rollers are all used to transmit the pole piece strip.
6. The laser cutting system according to claim 5, characterized in that: Along the transmission direction, the laser cutter is arranged between two adjacent conveying rollers, the conveying roller located in front of the laser cutter is the first conveying roller, and the photoelectric sensor is arranged corresponding to the first conveying roller.
7. The laser cutting system according to claim 6, characterized in that: The photoelectric sensor includes a transmitting end and a receiving end. The transmitting end is arranged corresponding to the first conveying roller, and the receiving end is arranged on the first conveying roller. The transmitting end is used to emit light toward the first conveying roller, and the receiving end is used to receive the light emitted by the transmitting end.
8. The laser cutting system according to claim 7, characterized in that: The receiving end is arranged at the center position of the first conveying roller.
9. The laser cutting system according to claim 8, characterized in that: The light emitted by the emitting end has a preset width, and the preset width is greater than half the width of the pole piece strip.
10. The laser cutting system according to any one of claims 1 to 9, characterized in that: The laser cutting system also includes a pole piece deviation correction device, which is arranged before the photoelectric sensor along the transmission direction of the transmission device, and the pole piece deviation correction device is used to adjust the position of the pole piece strip on the transmission device.