Laser diaphragm cutting equipment

Abstract

The invention discloses laser diaphragm cutting equipment, and relates to the technical field of lithium battery manufacturing, and the laser diaphragm cutting equipment comprises a laser cutting part which comprises a first laser cutting device and a second laser cutting device which are sequentially arranged along the diaphragm conveying direction, the first laser cutting device is used for diaphragm cutting of a left battery cell, and the second laser cutting device is used for diaphragm cutting of a right battery cell; the detection part comprises a visual detection device and a short-circuit testing device which are sequentially arranged in the diaphragm conveying direction, and the visual detection device and the short-circuit testing device are both arranged on the downstream of the second laser cutting device; and the rotating disc assembly is used for bearing the diaphragm, and the diaphragm is switched and conveyed between the laser cutting part and the detection part through the rotating disc assembly. The working efficiency of diaphragm cutting is improved in a laser mode, the problem that due to cutting of an existing metal cutter, diaphragm sticking to the cutter is brought up, and material blockage is caused seriously is solved, tools do not need to be replaced, the production cost is reduced, and meanwhile the diaphragm cutting quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery manufacturing, and in particular to a laser diaphragm cutting device. Background Art

[0002] The diaphragm is a key component of lithium batteries. It determines the interface structure, internal resistance, etc. of the battery, and directly affects the capacity and safety performance of the lithium battery. The existing diaphragm cutting element is a metal cutter, which is easy to stick to the knife during the cutting operation, and the diaphragm will be lifted, which will seriously cause blockage. At the same time, the metal cutter is a consumable part and needs to be replaced regularly, which has low work efficiency.

[0003] Therefore, how to improve the efficiency of diaphragm cutting while ensuring the quality of diaphragm cutting is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0004] The object of the present invention is to provide a laser diaphragm cutting device, which is used to improve the efficiency of diaphragm cutting and ensure the quality of diaphragm cutting.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A laser diaphragm cutting device, comprising: A laser cutting unit, comprising a first laser cutting device and a second laser cutting device arranged in sequence along a diaphragm conveying direction, wherein the first laser cutting device is used for cutting the diaphragm of a left battery cell, and the second laser cutting device is used for cutting the diaphragm of a right battery cell; A detection unit, comprising a visual detection device and a short circuit test device arranged in sequence along the membrane conveying direction, and the visual detection device and the short circuit test device are both arranged downstream of the second laser cutting device; The turntable assembly is used for carrying the diaphragm, and the diaphragm is switched and transmitted between the laser cutting part and the detection part through the turntable assembly.

[0006] Optionally, the above-mentioned laser diaphragm cutting equipment further includes a dust removal part, which is provided with a dust removal brush. The dust removal brush is arranged between the second laser cutting device and the visual inspection device to clean the surface of the diaphragm after the laser cutting of the diaphragm is completed.

[0007] Optionally, in the above-mentioned laser diaphragm cutting equipment, the dust removal part is further provided with a negative pressure dust removal pipe, and during the process of the laser cutting part cutting the diaphragm by laser, real-time dust removal is performed through the negative pressure dust removal pipe.

[0008] Optionally, in the above-mentioned laser diaphragm cutting equipment, the turntable assembly includes a carrying plate and a rotating mechanism, the first laser cutting device, the second laser cutting device, the dust removal brush and the visual inspection device are distributed on the outer circumference of the carrying plate with the axis of the carrying plate as the center, and the rotating mechanism is arranged on the axis of the carrying plate and can rotate around the axis of the carrying plate so as to transport the diaphragm through the rotating mechanism.

[0009] Optionally, in the above-mentioned laser diaphragm cutting equipment, the carrying plate is provided with a carrying station, and there are multiple carrying stations, and the first laser cutting device, the second laser cutting device, the dust removal brush and the visual inspection device correspond to one of the carrying stations respectively, and the rotating mechanism places the diaphragm at the corresponding carrying station for corresponding processing, so that each of the carrying stations forms a first laser cutting station, a second laser cutting station, a brush dust removal station and a visual inspection station.

[0010] Optionally, in the above-mentioned laser diaphragm cutting equipment, the carrying plate is also provided with the carrying station for placing materials during loading and the carrying station for placing materials during unloading, so as to form a loading station and an unloading station respectively, and the loading station is arranged upstream of the first laser cutting station, and the unloading station is arranged downstream of the visual inspection station.

[0011] Optionally, in the above-mentioned laser diaphragm cutting equipment, a loading part is also provided, and the loading part includes a loading conveyor line and a loading robot. The diaphragm is transported to the loading robot through the loading conveyor line, and then the diaphragm is transported to the turntable assembly through the loading robot.

[0012] Optionally, the above-mentioned laser diaphragm cutting equipment also includes a positioning part, and the loader robot places the diaphragm on the positioning part, and after positioning the battery cell position of the diaphragm through the positioning, the diaphragm of the positioning part is removed by the loading and transported to the turntable assembly.

[0013] Optionally, in the above-mentioned laser diaphragm cutting equipment, a unloading part is also provided, which includes a unloading robot, a unloading conveyor line and a material box, and the unloading robot transports the battery cells to the unloading conveyor line, and the unloading conveyor line conveys the battery cells to the material box.

[0014] Optionally, in the above-mentioned laser diaphragm cutting equipment, two groups of the short-circuit test devices are provided, and one group of the short-circuit test devices is spare.

[0015] When the laser diaphragm cutting device provided by the present invention is used, after the diaphragm is transferred to the laser cutting part through the turntable assembly, the diaphragm of the left battery cell is first cut by the first laser cutting device, and then it is continuously transferred to the second laser cutting device. The second laser cutting device cuts the diaphragm of the right battery cell. After the diaphragms of the left battery cell and the right battery cell are cut, the turntable assembly transfers the cut battery cell to the visual inspection device again to inspect the appearance and cutting effect of the cut battery cell. The battery cell that passes the inspection is continuously transferred to the short circuit test device for short circuit testing. The battery cell that passes the test is continuously transferred to the next process, and the cutting work of the diaphragm is finally completed. Compared with the prior art, the laser diaphragm cutting device provided by the present invention not only improves the working efficiency of diaphragm cutting by laser, but also avoids the problem of sticking diaphragm brought up by the existing metal cutter cutting, which seriously causes material blockage, and there is no need to replace props, thereby reducing production costs. At the same time, through the set turntable assembly and detection unit, the automatic and efficient material transmission of the entire cutting process and the real-time inspection and control of quality during the diaphragm cutting process are realized, thereby ensuring the quality of diaphragm cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 A schematic diagram of the structure of a laser diaphragm cutting device disclosed in an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the turntable assembly disclosed in an embodiment of the present invention.

[0017] Reference numerals: 100 is a laser cutting unit, 110 is a first laser cutting device, and 120 is a second laser cutting device; 200 is a detection unit, 210 is a visual detection device, and 220 is a short circuit test device; 300 is a turntable assembly, 310 is a carrier plate, 311 is a first laser cutting station, 312 is a second laser cutting station, 313 is a brush dust removal station, 314 is a visual inspection station, 315 is a loading station, 316 is a unloading station, and 320 is a rotating mechanism; 400 is a dust removal brush; 500 is a loading section, 510 is a loading conveyor line, and 520 is a loading robot; 600 is a positioning unit; 700 is a material unloading part, 710 is a material unloading manipulator, 720 is a material unloading conveyor line, and 730 is a material box; 800 is the transfer robot. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0021] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The core of the present invention is to provide a laser diaphragm cutting device, which is used to improve the efficiency of diaphragm cutting while ensuring the quality of diaphragm cutting.

[0024] like Figure 1As shown, an embodiment of the present invention discloses a laser diaphragm cutting device, including a laser cutting unit 100, a detection unit 200 and a turntable assembly 300. The diaphragm is placed on the turntable assembly 300, and the diaphragm is transferred to the laser cutting unit 100 through the turntable assembly 300. The laser cutting unit 100 is provided with a first laser cutting device 110 and a second laser cutting device 120. The diaphragm is first transferred to the first laser cutting device 110, and the first laser cutting device 110 performs diaphragm cutting of the left battery cell according to a preset cutting path. After the first laser cutting device 110 completes the cutting, the diaphragm is continuously transferred to the second laser cutting device 120, and the second laser cutting device 120 continues to perform the cutting according to the preset cutting path. The cut path is set to cut the diaphragm of the right battery cell, and the cut battery cell is then transferred to the detection unit 200 by the turntable assembly 300. The detection unit 200 includes a visual inspection device 210 and a short-circuit test device 220. The visual inspection device 210 first performs visual inspection on the cut appearance and cutting effect. The battery cell that passes the inspection is then transported to the short-circuit test device 220 by the transfer robot 800, and the short-circuit test device 220 performs a short-circuit test. Finally, the qualified battery cell is transported to the next process. In a specific embodiment, the visual inspection device 210 uses a CCD (Charge-Coupled Device) camera for non-contact visual inspection, and analyzes and processes these images through an image processing system to achieve accurate measurement and judgment of the characteristics of the target object.

[0025] like Figure 1 As shown, the laser diaphragm cutting equipment provided in this embodiment also includes a dust removal section provided with a dust removal brush 400. The dust removal brush 400 is arranged between the second laser cutting device 120 and the visual inspection device 210 to promptly clean the dust on the surface of the diaphragm after the second laser cutting device 120 completes cutting, thereby providing good detection conditions for the visual inspection of the visual inspection device 210, reducing the interference of dust on the detection process, and improving the reliability and accuracy of the detection results such as the appearance after cutting and the cutting effect.

[0026] Furthermore, the dust removal section is also provided with a negative pressure dust removal pipe, and the first laser cutting device 110 and the second laser cutting device 120 in the laser cutting section are both provided with a negative pressure dust removal pipe, so that during the laser cutting process, the diaphragm waste generated by the cutting will be automatically sucked, collected and discharged in time by the negative pressure dust removal pipe, thereby avoiding the interference of the waste with the laser cutting process, ensuring the accuracy and good operation of the laser cutting, and avoiding the accumulation of waste, so that the equipment maintains a good cleanliness.

[0027] like Figure 1 and Figure 2As shown, the turntable assembly 300 includes a carrier plate 310 and a rotating mechanism 320. The first laser cutting device 110, the second laser cutting device 120, the dust brush 400 and the visual inspection device 210 are distributed on the outer circumference of the carrier plate 310 with the axis of the carrier plate 310 as the center. The rotating mechanism 320 is arranged on the axis of the carrier plate 310, and the rotating mechanism 320 can rotate around the axis of the carrier plate 310, so that the diaphragm is transferred between the first laser cutting device 110, the second laser cutting device 120, the dust brush 400 and the visual inspection device 210 on the same circumference through the rotating mechanism 320, thereby realizing automatic transportation of the diaphragm.

[0028] At the same time, the carrying plate 310 is provided with a plurality of carrying stations, and the first laser cutting device 110, the second laser cutting device 120, the dust removal brush 400 and the visual inspection device 210 respectively correspond to a carrying station one by one, so as to form a first laser cutting station 311, a second laser cutting station 312, a brush dust removal station 313 and a visual inspection station 314. Therefore, when processing the diaphragm, the rotating mechanism 320 first places the diaphragm in the corresponding carrying station, and then performs corresponding processing, and positions the diaphragm through the carrying station, thereby ensuring the accuracy of the diaphragm position after placement and the stability of the diaphragm during processing, ensuring the efficient and accurate operation of the diaphragm by each device, improving the quality of diaphragm cutting and the qualified rate of processing and production.

[0029] like Figure 2 As shown, the carrier plate 310 is also provided with a carrying station for placing materials during loading and a carrying station for placing materials during unloading, so as to form a loading station 315 and an unloading station 316 respectively, and the loading station is arranged upstream of the first laser cutting station 311, and the unloading station 316 is arranged downstream of the visual inspection station 314, so that the diaphragm is first placed at the loading station 315, and the rotating mechanism 320 then transports the diaphragm at the loading station 315 to the first laser cutting station 311, and after the visual inspection station 314 is inspected by the visual inspection device 210, the rotating mechanism 320 first places the diaphragm on the visual inspection station 314 To the unloading station 316, and then transferred to the short-circuit testing device 220 by the unloading station 316, the loading station 315 and the unloading station 316 form a buffer zone, which provides sufficient time for the operation of the next process and ensures the smoothness of the diaphragm transmission. At the same time, the first laser cutting station 311, the second laser cutting station 312, the brush dust removal station 313, the visual inspection station 314, the loading station 315 and the unloading station 316 are on the same circle, forming a closed-loop repetitive cycle, which reduces the path and time of the diaphragm's turnover between various devices, further improves the efficiency of the entire diaphragm cutting work, and at the same time improves the compactness of the entire equipment structure.

[0030] like Figure 1 As shown, in order to further improve the automation and efficiency of the operation of the laser diaphragm cutting equipment provided in this embodiment, a loading section 500 is also provided. The loading section 500 includes a loading conveyor line 510 and a loading robot 520. After the staff places the diaphragm on the loading conveyor line 510, the diaphragm is conveyed to the loading robot 520 on the loading conveyor line 510. The loading robot 520 is a double gripping mechanism, equipped with a lifting mechanism, an adsorption mechanism and an automatic transplanting mechanism, and then the diaphragm is transported to the turntable assembly 300 by the loading robot 520.

[0031] In addition, a positioning part 600 is also provided between the loading robot 520 and the turntable assembly 300. Therefore, when the loading robot 520 moves the diaphragm to the turntable assembly 300, the loading robot 520 first places the diaphragm on the positioning part 600, and the positioning part 600 corrects the position of the battery cell. After the positioning is completed, the loading robot 520 moves the corrected diaphragm to the loading station 315. Therefore, during the laser cutting process, the diaphragm has a higher positioning accuracy to ensure the accurate cutting of the diaphragm by the first laser cutting device 110 and the second laser cutting device 120.

[0032] like Figure 1 As shown, the laser diaphragm cutting device provided in this embodiment is also provided with a material unloading part 700, which includes a material unloading robot 710, a material unloading conveyor line 720 and a material box 730. After the short circuit test device 220 completes the short circuit test, the material unloading robot 710 transports the battery cell located on the visual inspection station 314 to the material unloading conveyor line 720, and the material unloading conveyor line 720 transports the qualified battery cell and places it in the material box 730, so that the battery cell can flow into the downstream equipment.

[0033] In a specific embodiment, there are two groups of short-circuit test devices 220 in the laser diaphragm cutting equipment provided in this embodiment, one group of short-circuit test devices 220 is in working state, and the other group of short-circuit test devices 220 is in standby state. The standby group can be activated when a failure occurs in the other group to ensure the normal operation of the cutting work, thereby improving the reliability of the operation of the entire laser diaphragm cutting equipment.

[0034] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A laser diaphragm cutting device, characterized in that: include: A laser cutting unit, comprising a first laser cutting device and a second laser cutting device arranged in sequence along a diaphragm conveying direction, wherein the first laser cutting device is used for cutting the diaphragm of a left battery cell, and the second laser cutting device is used for cutting the diaphragm of a right battery cell; A detection unit, comprising a visual detection device and a short circuit test device arranged in sequence along the membrane conveying direction, and the visual detection device and the short circuit test device are both arranged downstream of the second laser cutting device; The turntable assembly is used for carrying the diaphragm, and the diaphragm is switched and transmitted between the laser cutting part and the detection part through the turntable assembly.

2. The laser diaphragm cutting device according to claim 1, characterized in that: It also includes a dust removal part, which is provided with a dust removal brush. The dust removal brush is arranged between the second laser cutting device and the visual inspection device to clean the surface of the diaphragm after the laser cutting of the diaphragm is completed.

3. The laser diaphragm cutting device according to claim 2, characterized in that: The dust removal part is also provided with a negative pressure dust removal pipe, and during the process of the laser cutting part cutting the diaphragm by laser, dust is removed in real time through the negative pressure dust removal pipe.

4. The laser diaphragm cutting device according to claim 2, characterized in that: The turntable assembly includes a carrying plate and a rotating mechanism. The first laser cutting device, the second laser cutting device, the dust removal brush and the visual inspection device are distributed on the outer circumference of the carrying plate with the axis of the carrying plate as the center. The rotating mechanism is arranged at the axis of the carrying plate and can rotate around the axis of the carrying plate so as to transport the diaphragm through the rotating mechanism.

5. The laser diaphragm cutting device according to claim 3, characterized in that: The carrying plate is provided with a carrying station, and there are multiple carrying stations. The first laser cutting device, the second laser cutting device, the dust removal brush and the visual inspection device correspond to one of the carrying stations respectively. The rotating mechanism places the diaphragm at the corresponding carrying station for corresponding processing, so that each of the carrying stations forms a first laser cutting station, a second laser cutting station, a brush dust removal station and a visual inspection station.

6. The laser diaphragm cutting device according to claim 5, characterized in that: The carrying plate is also provided with the carrying station for placing materials during loading and the carrying station for placing materials during unloading, so as to form a loading station and an unloading station respectively, and the loading station is arranged upstream of the first laser cutting station, and the unloading station is arranged downstream of the visual inspection station.

7. The laser diaphragm cutting device according to claim 1, characterized in that: A loading part is also provided, which includes a loading conveyor line and a loading robot. The diaphragm is transported to the loading robot through the loading conveyor line, and then the diaphragm is transported to the turntable assembly through the loading robot.

8. The laser diaphragm cutting device according to claim 7, characterized in that: It also includes a positioning part, and the loader robot places the diaphragm on the positioning part. After positioning the battery cell position of the diaphragm through the positioning, the diaphragm of the positioning part is removed by the loading and transported to the turntable assembly.

9. The laser diaphragm cutting device according to claim 1, characterized in that: A material unloading section is also provided, which includes a material unloading robot, a material unloading conveyor line and a material box. The material unloading robot transports the battery cells to the material unloading conveyor line, and the material unloading conveyor line conveys the battery cells to the material box.

10. The laser membrane cutting device according to claim 1, characterized in that: The short-circuit test device is provided in two groups, and one group of the short-circuit test device is a spare one.

Images