Cleaning device and cleaning method for welding position of lithium battery shell

Abstract

The invention relates to the technical field of welding cleaning devices, in particular to a cleaning device and a cleaning method for a welding position of a lithium battery shell. The cleaning device comprises a six-axis mechanical arm located in the center and two overturning tools distributed on the two sides of the six-axis mechanical arm, each overturning tool comprises a rectangular plate frame formed by welding long-direction square steel on the two sides and front-back wide-direction square steel, and a pair of supporting plates used for clamping a battery shell are arranged on each rectangular plate frame. A spacing control mechanism for controlling relative displacement of the supporting plates on the two sides is installed on the outer side end face of the width-direction square steel, the bottoms of the front end and the rear end of the rectangular plate frame are fixed to L-shaped supporting brackets, and the front supporting brackets and the rear supporting brackets are fixedly connected with output shafts of a rotary power base and a cooperative tailstock correspondingly; according to the battery shell cleaning device, material overturning of the overturning tool can be utilized, cleaning points can be found through the middle six-axis mechanical arm, and all-directional scanning and battery shell cleaning are conducted under an electric control program.

Description

Technical Field

[0001] The present invention relates to the technical field of welding cleaning devices, and in particular to a cleaning device and a cleaning method for welding points of a lithium battery shell. Background Art

[0002] Currently, the welds of lithium battery shells are all cleaned by manual grinding. However, manual grinding and cleaning has the following disadvantages: a harsh working environment, high labor intensity, and difficulty in ensuring welding quality. In addition, a large amount of metal dust particles are released during the process. On the one hand, these metal dust particles enter the lungs through the respiratory tract, causing serious harm to the physical and mental health of welders. On the other hand, dust enters the weld, seriously affecting the welding quality and the airtightness of the battery, leading to safety hazards. The harsh production environment consumes a lot of workers' physical strength and energy, making it difficult for workers to work continuously and stably, resulting in difficulty in reliably guaranteeing the grinding quality; Therefore, traditional manual polishing is difficult to meet the rapid development of contemporary economy and technology and people's pursuit of quality of life. Summary of the Invention

[0003] The present invention provides a cleaning device and method for the welding part of the lithium battery shell, which is in the technical field of welding cleaning devices. In order to solve the problem that manual welding quality is difficult to be reliably guaranteed, manual grinding and cleaning are important factors affecting the welding quality, resulting in a reduction in the service life of the lithium battery shell. At the same time, the device is equipped with a laser weld guidance system, which can track and correct the micro-deformation area of ​​the welding part in real time, effectively solving some process difficulties and quality control difficulties. The present invention is achieved through the following technical solutions: A cleaning device for the welding part of the lithium battery shell, comprising a six-axis manipulator located in the center and two flip toolings distributed on both sides thereof; The flip tooling includes a rectangular plate frame welded by two long square steels and front and rear width square steels. A pair of support plates for clamping the battery shell are provided on the rectangular plate frame. The outer end surfaces of the width square steels are installed with a spacing control mechanism for controlling the relative displacement of the support plates on both sides. The front and rear end bottoms of the rectangular plate frame are fixed on L-shaped support brackets, and the front and rear support brackets are fixedly connected to the output shafts of the rotating power base and the coordinated tailstock respectively. The six-axis manipulator is fixed with a laser guide head and a laser cleaning head; A pedal platform is provided on the side of the flip tool away from the six-axis manipulator, and a safety protection mechanism is provided on the periphery of the pedal platform, the flip tool and the six-axis manipulator.

[0004] Preferably, each of the flipping tools includes a motor installed at the end of the long square steel, a bevel gear b is fixed on the output shaft of each motor, two coaxial screw rods are provided on both sides of each wide square steel, and each screw rod is fixed on both sides of the bearing seat for rotation, and a bevel gear a is fixed at the outer end of the screw rod, and the bevel gear a is meshed with the bevel gear b.

[0005] Preferably, a slide is provided on the screw rod and the two are threadedly connected. A guide rail parallel to it is fixed on each wide square steel. The corresponding sliders on the front and rear guide rails are fixed on the bottom of the support plate, and the bottom of the support plate on each side is fixedly connected to the two corresponding slides in the front and rear.

[0006] Preferably, the rotary power seat is equipped with a flip motor, and the coordinated tailstock is equipped with a flip bearing seat; Each of the support plates is fixed with a bar parallel to the long square steel, and the bar can abut against the side of the battery housing; When the support bracket flips over the rectangular plate frame, the rectangular plate frame does not contact the welding cleaning platform below.

[0007] Preferably, a number of equidistant clamping cylinders are fixed on each support plate, a rotating rod perpendicular to the telescopic rod of the clamping cylinder is fixed, an abutment column is fixed to the bottom of the other end of the rotating rod, and a rubber head is provided at the end of the abutment column.

[0008] Preferably, the six-axis manipulator is fixed on a manipulator base, and the manipulator base is located in the middle of the long square steel (404); A right-angled connecting sheet metal is fixed to the end output shaft of the six-axis manipulator. An outlet pipe for blowing out inert gas is fixed to the bottom of the connecting sheet metal. A laser cleaning head is fixed to the top of the connecting sheet metal. The connecting sheet metal fixes the laser guide head through a guide bracket so that the laser guide head is located directly above the laser cleaning head.

[0009] Preferably, the safety protection device includes a safety fence that encloses the pedal platform, the turning tool and the six-axis manipulator. The safety fence is provided with two entrances and exits corresponding to the pedal platform, and safety gratings are provided on the safety fence at the entrance and exit positions.

[0010] Preferably, the electrical control components of the cleaning device are all controlled by a control cabinet located outside the safety fence.

[0011] Preferably, a gas cabinet is installed outside the safety fence, and the gas cabinet is connected to the gas outlet pipe through a gas pipe.

[0012] Preferably, the cleaning device is for the battery casing, using a laser cleaning head, using a pulsed laser beam with a pulse width of 10-200 ns, a pulse energy of 0.1-10 mJ, a repetition frequency of 10-200 kHz, a scanning speed of 100-2000 mm / s, a spot diameter of 20-200 μm and a wavelength of 1064 nm for laser cleaning; The nitrogen or argon gas output through the gas outlet pipe protects the cleaning area of ​​the battery casing.

[0013] The beneficial effects of the present invention are: The present invention can utilize the material turning of the turning tool and the cleaning point finding of the middle six-axis manipulator, and perform all-round scanning and cleaning of the battery shell under the electronic control program.

[0014] The present invention can clean the battery casings on both sides after loading, with high speed and efficiency, without manual intervention, and ensuring safety.

[0015] Lin Yong's cleaning method achieves thorough cleaning while minimizing the heat-affected zone, avoiding damage to the substrate (such as melting, discoloration, and microcracks), and maximizing cleaning efficiency. High cleanliness: Laser cleaning can be used to thoroughly remove oil, oxides, dust and other pollutants from the shell surface before welding, helping to improve welding quality (cold welds, pores, insufficient strength) and battery airtightness, and effectively avoid safety hazards (leakage, fire). Environmental protection and efficiency: Compared with traditional chemical cleaning, no additional pollutants such as waste liquid are generated. Compared with sandblasting, there is no dust and noise, and the efficiency and consistency of the surface appearance of the workpiece after cleaning are significantly improved. Surface condition: Cleaning does not damage the substrate (such as the aluminum shell is soft), and can maintain or improve the surface condition (such as improving the surface energy to facilitate subsequent gluing or coating). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional enlarged view of the flip tool; Figure 3 The figure is a schematic diagram of the assembly of the screw rod and its components; Figure 4 is a schematic diagram of the clamping cylinder and its components; Figure 5 and Figure 6 This is a three-dimensional schematic diagram of the relevant components of the six-axis robot; Figure 7 Schematic diagram of the equipment structure within the protective device.

[0017] In the picture: 1. Safety guardrail, 101. Safety grating, 2. Pedal platform, 3. Welding cleaning platform, 4. Flip tooling, 401. Rotating power seat, 402. Coordinated tailstock, 403. Support bracket, 404. Longitudinal square steel, 405. Width-direction square steel, 5. Screw, 501. Slide, 502. Support, 503. Retaining bar, 504. Slider, 505. Guide rail, 506. Bearing seat, 507. Bevel gear a, 508. Bevel gear b, 509. Motor, 6. Clamping cylinder, 601. Rotating rod, 602. Abutment column, 7. Six-axis manipulator, 701. Manipulator base, 702. Connecting sheet metal, 703. Exhaust pipe, 704. Laser cleaning head, 705. Guide bracket, 706. Laser guide head, 8. Control cabinet, 9. Gas cabinet, 10. Battery casing. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0020] refer to Figures 1 to 7 , the present invention includes a cleaning device, the cleaning device includes a six-axis manipulator 7 located in the central position and two flip tooling 4 distributed on both sides thereof; The flip tool 4 includes a rectangular plate frame welded by two long square steels 404 and front and rear wide square steels 405, which is used to place materials. A pair of support plates 502 for clamping the battery shell 10 is provided on the rectangular plate frame. The outer end surface of the wide square steel 405 is installed with a spacing control mechanism for controlling the relative displacement of the support plates 502 on both sides. The bottom of the front and rear ends of the rectangular plate frame are fixed on the L-shaped support bracket 403, and the front and rear support brackets 403 are respectively fixedly connected to the output shafts of the rotating power base 401 and the coordinated tailstock 402; The six-axis manipulator 7 is fixed with a laser guide head 706 and a laser cleaning head 704; A pedal platform 2 is provided on the side of the flip tool 4 away from the six-axis manipulator 7, and the operator can load materials and repair the equipment at this position. Safety protection mechanisms are provided on the periphery of the pedal platform 2, the flip tool 4 and the six-axis manipulator 7.

[0021] Each of the flipping tooling 4 includes a motor 509 installed at the end of the long square steel 404, and a bevel gear b508 is fixed on the output shaft of each motor 509. Two coaxial screw rods 5 are provided on both sides of each wide square steel 405, and each screw rod 5 is rotatably connected to the bearing seat 506 fixed on both sides thereof, and a bevel gear a507 is fixed to the outer end of the screw rod 5. The bevel gear a507 is engaged with the bevel gear b508, so that each motor 509 indirectly controls the displacement of the slide 501. Since four groups are provided at the four corners of each flipping tooling 4, technicians in this field know that they should be debugged to ensure consistency using electronic control equipment such as PLC to prevent the speed or position of the front and rear motors 509 from being out of sync.

[0022] The screw rods 5 are each provided with a slide 501 and the two are threadedly connected. A guide rail 505 parallel to it is fixed on each wide square steel 405. The corresponding sliders 504 on the front and rear guide rails 505 are fixed to the bottom of the support plate 502. The bottom of the support plate 502 on each side is fixedly connected to the two corresponding slides 501 in the front and rear.

[0023] The rotary power seat 401 is equipped with a flip motor, and the cooperative tailstock 402 is equipped with a flip bearing seat. The flip motor is a conventional motor, and its rotation is also controlled by the industrial control equipment in the control cabinet 8. The flip bearing seat is also a conventional bearing seat, which is used to carry a conventional output shaft and passively accept the rotation speed of the flip motor. Each of the support plates 502 is fixed with a bar 503 parallel to the longitudinal square steel 404. The bar 503 can abut against the side of the battery housing 10 to ensure left and right clamping. When the support bracket 403 flips the rectangular plate frame, the rectangular plate frame does not contact the welding cleaning platform 3 below, thereby avoiding collision.

[0024] Several equidistant clamping cylinders 6 are fixed on each support plate 502, which can apply pressure to the top edges of both sides of the battery housing 10. A rotating rod 601 perpendicular to it is fixed on the telescopic rod of the clamping cylinder 6, and an abutment column 602 is fixed to the bottom of the other end of the rotating rod 601. A rubber head is provided at the end of the abutment column 602 to prevent scratches, increase friction (to prevent the battery housing 10 from sliding) and act as an elastic buffer.

[0025] The six-axis manipulator 7 is fixed on a manipulator base 701, and the manipulator base 701 is located in the middle of the long square steel 404; A right-angled connecting sheet metal 702 is fixed to the end output shaft of the six-axis manipulator 7, which is used to fix and connect related cleaning components. An outlet pipe 703 for blowing out inert gas is fixed at the bottom position of the connecting sheet metal 702, and a laser cleaning head 704 is fixed at the top position of the connecting sheet metal 702. The connecting sheet metal 702 fixes the laser guide head 706 through the guide bracket 705, so that the laser guide head 706 is located directly above the laser cleaning head 704. The laser guide head 706 is used to guide the cleaning action of the six-axis manipulator 7, and its model is LJ-X8400.

[0026] The safety protection device includes a safety fence 1 that encloses the pedal platform 2, the flip tooling 4 and the six-axis manipulator 7. The safety fence 1 is provided with two entrances and exits corresponding to the pedal platform 2. A safety grating 101 is provided on the safety fence 1 at the entrance and exit positions. When a person is detected entering during equipment operation, an emergency stop will occur.

[0027] The electric control components of the cleaning device are all controlled by a control cabinet 8 located outside the safety fence 1. The control cabinet 8 is equipped with electric control modules such as a switching power supply and a PLC that are well known to those skilled in the art.

[0028] A gas cabinet 9 is also installed outside the safety fence 1, with a built-in gas generator. The gas cabinet 9 is connected to the gas outlet pipe 703 through a gas pipe to provide inert gas.

[0029] The cleaning device uses a laser cleaning head 704 to clean the battery housing 10 using a pulsed laser beam with a pulse width of 10-200 ns, a pulse energy of 0.1-10 mJ, a repetition rate of 10-200 kHz, a scanning speed of 100-2000 mm / s, a spot diameter of 20-200 μm, and a wavelength of 1064 nm. The nitrogen or argon gas outputted through the gas outlet pipe 703 protects the cleaned area of ​​the battery housing 10 .

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A cleaning device for the welding part of lithium battery shell, characterized by: The cleaning device includes a six-axis manipulator (7) located in the center and two flip toolings (4) distributed on both sides thereof; The turning tool (4) comprises a rectangular plate frame welded by two side longitudinal square steels (404) and front and rear width square steels (405), a pair of support plates (502) for clamping the battery housing (10) are provided on the rectangular plate frame, and a spacing control mechanism for controlling the relative displacement of the support plates (502) on both sides is installed on the outer end surface of the width square steel (405), and the bottom of the front and rear ends of the rectangular plate frame are fixed on an L-shaped support bracket (403), and the front and rear support brackets (403) are fixedly connected to the output shafts of the rotating power base (401) and the coordinated tail base (402) respectively. A laser guiding head (706) and a laser cleaning head (704) are fixed on the six-axis manipulator (7); A pedal platform (2) is provided on the side of the flip tool (4) away from the six-axis manipulator (7), and a safety protection mechanism is provided on the periphery of the pedal platform (2), the flip tool (4) and the six-axis manipulator (7).

2. The cleaning device for the welding part of the lithium battery shell according to claim 1 is characterized in that: Each of the turning tools (4) comprises a motor (509) mounted at the end of the longitudinal square steel (404), a bevel gear b (508) being fixed on the output shaft of each motor (509), two coaxial screw rods (5) being provided on both sides of each width square steel (405), and each screw rod (5) being rotationally connected to bearing seats (506) fixed on both sides thereof, a bevel gear a (507) being fixed at the outer end of the screw rod (5), and the bevel gear a (507) being meshed with the bevel gear b (508).

3. The cleaning device for the welding part of the lithium battery shell according to claim 1 is characterized in that: The screw rod (5) is provided with a slide seat (501) and the two are threadedly connected. A guide rail (505) parallel to the width square steel (405) is fixed thereon. The corresponding sliders (504) on the front and rear guide rails (505) are fixed to the bottom of the support plate (502). The bottom of each side of the support plate (502) is fixedly connected to the two corresponding slide seats (501) at the front and rear.

4. The cleaning device for the welding part of the lithium battery shell according to claim 1 is characterized in that: The rotary power seat (401) is equipped with a turning motor, and the tail seat (402) is equipped with a turning bearing seat; A support bar (503) parallel to the longitudinal square steel (404) is fixed on each of the support plates (502), and the support bar (503) is capable of abutting against the side surface of the battery housing (10); When the support bracket (403) turns over the rectangular plate frame, the rectangular plate frame does not contact the welding cleaning platform (3) below.

5. The cleaning device for the welding part of the lithium battery shell according to claim 1 is characterized in that: A plurality of equidistant clamping cylinders (6) are fixed on each support plate (502), a rotating rod (601) perpendicular to the clamping cylinder (6) is fixed on the telescopic rod of the clamping cylinder (6), an abutting column (602) is fixed at the bottom of the other end of the rotating rod (601), and a rubber head is provided at the end of the abutting column (602).

6. The cleaning device for the welding part of the lithium battery shell according to claim 1, characterized in that: The six-axis manipulator (7) is fixed on a manipulator base (701), and the manipulator base (701) is located in the middle of the long square steel (404); A right-angled connecting sheet metal (702) is fixed to the output shaft at the end of the six-axis manipulator (7); an outlet pipe (703) for blowing out inert gas is fixed to the bottom of the connecting sheet metal (702); a laser cleaning head (704) is fixed to the top of the connecting sheet metal (702); and a laser guide head (706) is fixed to the connecting sheet metal (702) via a guide bracket (705), so that the laser guide head (706) is located directly above the laser cleaning head (704).

7. The cleaning device for the welding portion of the lithium battery housing according to claim 6, characterized in that: The safety protection device comprises a safety guardrail (1) enclosing the pedal platform (2), the turning tool (4), and the six-axis manipulator (7); the safety guardrail (1) is provided with two entrances and exits corresponding to the pedal platform (2); and safety gratings (101) are provided on the safety guardrail (1) at the entrance and exit positions.

8. The cleaning device for the welding portion of the lithium battery housing according to claim 7, characterized in that: The electrical control components of the cleaning device are all controlled by a control cabinet (8) located outside the safety fence (1).

9. The cleaning device for the welding portion of the lithium battery housing according to claim 8, characterized in that: A gas cabinet (9) is also installed outside the safety guardrail (1), and the gas cabinet (9) is connected to the gas outlet pipe (703) through a gas pipe.

10. A cleaning method according to any one of claims 1 to 9, characterized in that: The cleaning device is for the battery housing (10), and uses a laser cleaning head (704) to perform laser cleaning using a pulsed laser beam with a pulse width of 10-200 ns, a pulse energy of 0.1-10 mJ, a repetition frequency of 10-200 kHz, a scanning speed of 100-2000 mm / s, a spot diameter of 20-200 μm, and a wavelength of 1064 nm; The nitrogen or argon gas outputted through the gas outlet pipe (703) protects the cleaned area of ​​the battery housing (10).

Images