Copper foil conductive tab welding method and used laser welding equipment

Abstract

The invention discloses a copper foil conductive tab welding method and laser welding equipment used thereof.The method comprises the following steps that A, a copper foil roll is fixed to the feeding end of the laser welding equipment, and meanwhile a conductive tab is placed on a conductive tab feeding mechanism; b, the copper foil on the copper foil roll is pulled out to be connected with a material pulling mechanism at the discharging end of the laser welding equipment after advancing along the operation route; and C, the focal length of an optical fiber galvanometer type welding machine on the laser welding equipment is adjusted, and the laser welding equipment is started for continuous laser welding operation after adjustment. The problem that copper foils are prone to being welded through when existing ultrasonic welding equipment is used for welding copper foil conductive tabs is solved.

Description

Technical Field

[0001] The invention relates to the field of copper foil product production, in particular to a copper foil conductor ear welding method and a laser welding device used therein. Background Art

[0002] The copper foil for welding the conductive tabs is mainly used for conducting electricity and carrying other devices on the circuit. Copper foil plays an important role in welding, especially in the welding of the tabs in the battery core. As a conductor, copper foil ensures that the current flows efficiently in the electronic circuit and reduces energy loss.

[0003] In the prior art, ultrasonic welding technology is usually used to weld conductive electrode ears on copper foil. This technology actually has certain defects. Specifically, ultrasonic welding is prone to the problem of copper foil being welded through. Once the problem of copper foil being welded through occurs, high internal resistance will occur. In order to solve the problem, it is necessary to improve the existing welding technology and equipment for conductive electrode ears. Summary of the invention

[0004] The object of the present invention is to provide a copper foil conductor lug welding device to solve the problem that the copper foil is easily welded through by the existing ultrasonic welding device when used for copper foil conductor lug welding.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A copper foil conductor ear welding method comprises the following steps: A, fixing a copper foil roll on a feed end of a laser welding device, and placing a conductor ear on a feed mechanism of the conductor ear; B, pulling out the copper foil on the copper foil roll so that it travels along an operation route and then connected to a pulling mechanism at a discharge end of the laser welding device; C, adjusting the focal length of an optical fiber galvanometer welding machine on the laser welding device, and after adjustment, starting the laser welding device to perform continuous laser welding operations.

[0006] The original differential ultrasonic welding was changed to laser welding, which solved the disadvantages of ultrasonic welding.

[0007] The laser welding equipment used in the copper foil conductor lug welding method comprises a roller copper foil conveying mechanism and a laser welding mechanism, wherein the laser welding mechanism is arranged in the middle of the roller copper foil conveying mechanism, and the laser welding mechanism comprises a welding table, an optical fiber galvanometer welding machine and a conductor lug pressing mechanism, wherein the optical fiber galvanometer welding machine is arranged above the welding table, and the conductor lug pressing mechanism is arranged between the optical fiber galvanometer welding machine and the welding table, and a conductor lug feeding port is provided at the equipment installation back plate at the inner end of the welding table, and a cylinder-type pushing structure is provided at the inner end of the conductor lug feeding port.

[0008] In this scheme, the original ultrasonic welding mechanism is abandoned and an optical fiber galvanometer welding machine is adopted, thus changing the original differential ultrasonic welding to laser welding. This welding method solves the disadvantages of ultrasonic welding. During the welding process, the copper foil is transported on a roller copper foil conveying mechanism. When it reaches the welding table, the conductive electrode ear is pushed to the upper welding position of the copper foil by the pushing mechanism. After being pushed into place, the conductive electrode ear pressing mechanism presses the conductive electrode ear, and then the optical fiber galvanometer welding machine starts the welding operation. After the welding is completed, the copper foil welded with the conductive electrode ear is continuously sent to the subsequent processing equipment by the roller copper foil conveying mechanism for subsequent processing. The optical fiber galvanometer welding machine is arranged on a lifting mechanism for easy focusing.

[0009] As a further preferred embodiment of the present invention, the roller type copper foil conveying mechanism comprises a feed end copper foil reel support mechanism, an intermediate support roller and a terminal pulling mechanism which are sequentially arranged from front to back.

[0010] The copper foil roll support mechanism at the feed end can support the copper foil roll, the middle support roller can support and limit the copper foil, and the end pulling mechanism can pull the copper foil.

[0011] As a further preferred embodiment of the present invention, the copper foil roll supporting mechanism at the feed end includes a supporting cylinder and a copper foil roll limiting mechanism, the supporting cylinder is arranged at the lower part of the feeding end of the equipment installation back plate, the copper foil roll limiting mechanism includes a limiting head and a limiting head positioning mechanism, the limiting head is arranged at the outer end of the supporting cylinder, and the limiting head is detachably connected to the supporting cylinder through the limiting head positioning mechanism.

[0012] Existing limit heads are generally fixed-point limit heads, which means that the limit width cannot be adjusted after installation, and existing production lines usually do not produce only one specification of products, which means that the copper foil sizes used will be different, but limited by the equipment, the differences will not be too large. However, it is precisely this small size difference that makes the limit adaptability of the limit head poor, which can easily cause the copper foil to deviate during welding. In mild cases, the quality of the products produced cannot be guaranteed, and in severe cases, it will affect the entire production process, because the deviated copper foil may curl and entangle during the production process. For this reason, the existing limit head has been improved, and the fixed-point limit has been changed to an adjustable limit. This makes the limit structure more adaptable and can complete the limit operation more accurately, so that the copper foil will not be cheap during the delivery process, and the quality of copper foil processing can be better guaranteed.

[0013] As a further preferred embodiment of the present invention, the limit head is inserted into the outer end of the support cylinder, and a positioning plug hole is provided at the bottom of the limit head. The limit head positioning mechanism includes a horizontal telescopic support rod and a vertical connection positioning rod. The inner end of the horizontal telescopic support rod is fixedly connected to the equipment installation back plate, and the vertical connection positioning rod is arranged at the outer end of the horizontal telescopic support rod. The vertical positioning rod is threadedly connected to the horizontal telescopic support rod, and the upper part of the vertical positioning rod is adapted to the positioning plug hole. When the vertical positioning rod is at the uppermost position, its upper part will be inserted into the positioning plug hole.

[0014] The limit length can be adjusted by the horizontal telescopic support rod. After adjustment, the vertical connection positioning rod is screwed upward so that the upper part of the vertical connection positioning rod is inserted into the positioning plug hole at the bottom of the limit head. This can limit and fix the limit head. The structure is simple.

[0015] As a further preferred embodiment of the present invention, a height-adjustable lifting copper foil roll supporting roller is further provided below the supporting cylinder.

[0016] The support of the support cylinder is unilateral, and deformation problems will occur after long-term use. Once the above problem occurs, it will cause feeding deviation and affect the welding effect. In order to solve the above problem, a lifting copper foil roll support roller is added under the support cylinder. This can effectively help the support cylinder to support the copper foil roll, making it less likely to deform.

[0017] As a further preferred embodiment of the present invention, a soot blowing mechanism is further provided between the support cylinder and the middle support roller, and the soot blowing mechanism is arranged at the front part of the copper foil conveying path, and the soot blowing mechanism comprises an upper soot blowing port and a lower soot blowing port, and the upper soot blowing port and the lower soot blowing port are respectively located above and below the copper foil conveying path.

[0018] Can blow away the dust on the surface of copper foil before processing.

[0019] As a further preferred embodiment of the present invention, the end pulling mechanism includes a winding mechanism, an upper fixed roller row and a lower sliding roller row, the winding mechanism is arranged at the discharge end, the upper fixed roller row and the lower sliding roller row are arranged in front of the winding mechanism, the upper fixed roller row and the lower sliding roller row are arranged side by side, the roller body of the upper fixed roller row and the roller body of the lower sliding roller row are staggered, and the support plate of the lower sliding roller row is slidably connected to the equipment installation back plate through a slide rail.

[0020] Because welding takes time, sufficient welding time can be reserved by sliding the lower sliding roller row up and down through the end pulling mechanism. When the lower sliding roller row slides upward and approaches the upper fixed roller row, the winding mechanism will continue to wind up, but since the distance between the upper fixed roller row and the lower sliding roller row is closer, the stroke becomes shorter, and the winding mechanism winds up the extra part, so the copper foil at the welding table will not be pulled back. When the lower sliding roller row slides downward and away from the upper fixed roller row, the distance between the upper fixed roller row and the lower sliding roller row becomes farther, which can pull the copper foil at the welding table backward. Through the reciprocating operation of such a mechanism, the pulling process of the copper foil staying at the welding table for a period of time and then moving backward can be realized.

[0021] As a further preferred embodiment of the present invention, the surface of the welding table is a glass support table top, and welding table receiving rollers and welding table feeding rollers are respectively provided on both sides of the welding table.

[0022] As a further preferred embodiment of the present invention, an electrostatic guide mechanism is provided in front of the feeding roller of the welding table, and the electrostatic guide mechanism includes a small guide roller, the bottom surface of the small guide roller is in contact with a grounded metal sheet, and the bottom surface of the grounded metal sheet is connected to a grounded metal chain.

[0023] The impact of static electricity on laser welding is mainly reflected in the following aspects: 1. Static electricity may interfere with the stability of the laser beam, resulting in deviation or instability during the welding process; 2. Static electricity may also cause defects in the welding process, such as pores and cracks, thereby affecting the quality and strength of the welded joint; 3. Electrostatic discharge may also damage the electronic components of the laser welding equipment and shorten the service life of the equipment. Therefore, before laser welding, we need to reduce the hazards of static electricity as much as possible. During the transportation process, the copper foil will definitely generate a lot of static electricity due to friction with various structures. Therefore, in this solution, a static electricity conduction mechanism is specially set up to conduct away as much static electricity as possible before welding, solving the above-mentioned problems.

[0024] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. In this scheme, the original ultrasonic welding mechanism is abandoned and an optical fiber galvanometer welding machine is adopted, so that the original differential ultrasonic welding is changed to laser welding. This welding method solves the disadvantages of ultrasonic welding. During the welding process, the copper foil is transported on the roller copper foil conveying mechanism. When it reaches the welding table, the pushing mechanism pushes the conductive electrode ear to the upper welding position of the copper foil. After it is pushed into place, the conductive electrode ear pressing mechanism presses the conductive electrode ear, and then the optical fiber galvanometer welding machine starts the welding operation. After the welding is completed, the copper foil welded with the conductive electrode ear is continuously sent to the subsequent processing equipment by the roller copper foil conveying mechanism for subsequent processing.

[0025] 2. The copper foil roll support mechanism at the feed end can support the copper foil roll, the middle support roller can support and limit the copper foil, and the end pulling mechanism can pull the copper foil.

[0026] 3. Existing limit heads are generally fixed-point limit heads, that is, the limit width cannot be adjusted after installation, and existing production lines usually do not produce only one specification of products, that is, the sizes of copper foils used will be different, but limited by the equipment, the differences will not be too large. However, it is precisely this small size difference that makes the limit adaptability of the limit head poor, which can easily cause the copper foil to deviate during welding. In mild cases, the quality of the products produced cannot be guaranteed, and in severe cases, it will affect the entire production process, because the deviated copper foil may be curled and entangled during the production process. For this reason, the existing limit head has been improved, and the fixed-point limit has been changed to an adjustable limit. In this way, the limit structure has better adaptability and can complete the limit operation more accurately, so that the copper foil will not be cheap during the delivery process, and the quality of copper foil processing can be better guaranteed.

[0027] 4. The limit length can be adjusted by the horizontal telescopic support rod. After adjustment, the vertical connection positioning rod is screwed upward so that the upper part of the vertical connection positioning rod is inserted into the positioning plug hole at the bottom of the limit head. This can play a role in limiting and fixing the limit head. The structure is simple.

[0028] 5. Can blow away the dust on the surface of copper foil before processing.

[0029] 6. Because welding takes time, sufficient welding time can be reserved by sliding the lower sliding roller row of the end pulling mechanism up and down. When the lower sliding roller row slides upward and approaches the upper fixed roller row, the winding mechanism will continue to wind up, but because the distance between the upper fixed roller row and the lower sliding roller row is closer, the stroke becomes shorter, and the winding mechanism winds up the extra part, so the copper foil at the welding table will not be pulled back. When the lower sliding roller row slides downward and away from the upper fixed roller row, the distance between the upper fixed roller row and the lower sliding roller row becomes farther, which can pull the copper foil at the welding table to move backward. Through such a mechanism, the reciprocating operation can realize the pulling process in which the copper foil stays at the welding table for a period of time and then moves backward.

[0030] 7. The support of the support cylinder is unilateral, and deformation problems will occur after long-term use. Once the above problem occurs, it will cause feeding deviation and affect the welding effect. In order to solve the above problem, a lifting copper foil roll support roller is added under the support cylinder. This can effectively help the support cylinder to support the copper foil roll, making it less likely to deform.

[0031] 8. The influence of static electricity on laser welding is mainly reflected in the following aspects: 1. Static electricity may interfere with the stability of the laser beam, resulting in deviation or instability during the welding process; 2. Static electricity may also cause defects in the welding process, such as pores and cracks, thereby affecting the quality and strength of the welded joint; 3. Static electricity discharge may also damage the electronic components of the laser welding equipment and shorten the service life of the equipment. Therefore, before laser welding, we need to reduce the hazards of static electricity as much as possible. During the transportation process, the copper foil will definitely generate a lot of static electricity due to friction with various structures. Therefore, in this solution, a static electricity conduction mechanism is specially set up to conduct away as much static electricity as possible before welding, solving the above-mentioned problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the present invention.

[0033] Figure 2 It is a structural schematic diagram of the welding station of the present invention.

[0034] Figure 3 It is a schematic structural diagram of the copper foil roll support mechanism at the feed end of the present invention.

[0035] Figure 4 It is a schematic structural diagram of the lifting type copper foil roll supporting roller of the present invention.

[0036] Figure 5 It is a schematic structural diagram of the upper fixed roller row and the lower sliding roller row of the present invention.

[0037] 1-welding table, 10-electrostatic guiding mechanism, 11-welding table receiving roller, 12-welding table feeding roller, 2-optical fiber galvanometer welding machine, 3-conducting electrode ear pressing mechanism, 4-feeding end copper foil roll support mechanism, 41-support cylinder, 42-copper foil roll limiting mechanism, 421-limiting head, 422-limiting head positioning mechanism, 5-middle support roller, 6-end pulling mechanism, 61-winding mechanism, 62-upper fixed roller row, 63-lower sliding roller row, 7-soot blowing mechanism, 8-cylinder type pushing structure, 9-lifting copper foil roll support roller. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of 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. Specific embodiment 1:

[0045] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5A copper foil conductor ear welding method is shown, comprising the following steps: A, fixing a copper foil roll on a feed end of a laser welding device, and placing the conductor ear on a feeding mechanism of the conductor ear; B, pulling out the copper foil on the copper foil roll so that it travels along an operation route and is connected to a pulling mechanism at a discharge end of the laser welding device; C, adjusting the focal length of a fiber optic galvanometer welding machine on the laser welding device, and after adjustment, starting the laser welding device to perform continuous laser welding operations.

[0046] The original differential ultrasonic welding was changed to laser welding, which solved the disadvantages of ultrasonic welding. Specific embodiment 2:

[0048] The laser welding equipment used in the above-mentioned copper foil conductor ear welding method includes a roller copper foil conveying mechanism and a laser welding mechanism, wherein the laser welding mechanism is arranged in the middle of the roller copper foil conveying mechanism, and the laser welding mechanism includes a welding table 1, a fiber optic galvanometer welding machine 2 and a conductor ear pressing mechanism 3, wherein the fiber optic galvanometer welding machine 2 is arranged above the welding table 1, and the conductor ear pressing mechanism 3 is arranged between the fiber optic galvanometer welding machine 2 and the welding table 1, and a conductor ear feeding port is provided at the equipment installation back plate at the inner end of the welding table 1, and a cylinder type pushing structure 8 is provided at the inner end of the conductor ear feeding port.

[0049] In this scheme, the original ultrasonic welding mechanism is abandoned and an optical fiber galvanometer welding machine is adopted, thus changing the original differential ultrasonic welding to laser welding. This welding method solves the disadvantages of ultrasonic welding. During the welding process, the copper foil is transported on a roller copper foil conveying mechanism. When it reaches the welding table, the conductive electrode ear is pushed to the upper welding position of the copper foil by the pushing mechanism. After being pushed into place, the conductive electrode ear pressing mechanism presses the conductive electrode ear, and then the optical fiber galvanometer welding machine starts the welding operation. After the welding is completed, the copper foil welded with the conductive electrode ear is continuously sent to the subsequent processing equipment by the roller copper foil conveying mechanism for subsequent processing. The optical fiber galvanometer welding machine is arranged on a lifting mechanism for easy focusing. Specific embodiment 3:

[0051] This embodiment further illustrates the roller type copper foil conveying mechanism based on the specific embodiment 2, and the roller type copper foil conveying mechanism includes a feed end copper foil reel support mechanism 4, an intermediate support roller 5 and a terminal pulling mechanism 6 which are arranged in sequence from front to back.

[0052] The copper foil roll support mechanism at the feed end can support the copper foil roll, the middle support roller can support and limit the copper foil, and the end pulling mechanism can pull the copper foil. Specific embodiment 4:

[0054] This embodiment further illustrates the copper foil roll support mechanism 4 at the feed end on the basis of the specific embodiment 3. The copper foil roll support mechanism 4 at the feed end includes a support cylinder 41 and a copper foil roll limiting mechanism 42. The support cylinder 41 is arranged at the lower part of the feed end of the equipment installation back plate. The copper foil roll limiting mechanism 42 includes a limiting head 421 and a limiting head positioning mechanism 422. The limiting head 421 is arranged at the outer end of the support cylinder 41. The limiting head 421 is detachably connected to the support cylinder 41 through the limiting head positioning mechanism 422.

[0055] Existing limit heads are generally fixed-point limit heads, which means that the limit width cannot be adjusted after installation, and existing production lines usually do not produce only one specification of products, which means that the copper foil sizes used will be different, but limited by the equipment, the differences will not be too large. However, it is precisely this small size difference that makes the limit adaptability of the limit head poor, which can easily cause the copper foil to deviate during welding. In mild cases, the quality of the products produced cannot be guaranteed, and in severe cases, it will affect the entire production process, because the deviated copper foil may curl and entangle during the production process. For this reason, the existing limit head has been improved, and the fixed-point limit has been changed to an adjustable limit. This makes the limit structure more adaptable and can complete the limit operation more accurately, so that the copper foil will not be cheap during the delivery process, and the quality of copper foil processing can be better guaranteed. Specific embodiment 5:

[0057] This embodiment further illustrates the limit head 421 on the basis of specific embodiment 4. The limit head 421 is plugged into the outer end of the support cylinder 41. A positioning plug hole is provided at the bottom of the limit head 421. The limit head positioning mechanism 422 includes a horizontal telescopic support rod and a vertical connection positioning rod. The inner end of the horizontal telescopic support rod is fixedly connected to the equipment installation back plate, and the vertical connection positioning rod is arranged at the outer end of the horizontal telescopic support rod. The vertical positioning rod is threadedly connected to the horizontal telescopic support rod. The upper part of the vertical positioning rod is adapted to the positioning plug hole. When the vertical positioning rod is at the uppermost position, its upper part will be inserted into the positioning plug hole.

[0058] The limit length can be adjusted by the horizontal telescopic support rod. After adjustment, the vertical connection positioning rod is screwed upward so that the upper part of the vertical connection positioning rod is inserted into the positioning plug hole at the bottom of the limit head. This can limit and fix the limit head. The structure is simple. Specific embodiment 6:

[0060] This embodiment is based on the specific embodiment 4 and further includes a lifting type copper foil roll supporting roller 9 . A height-adjustable lifting type copper foil roll supporting roller 9 is also provided below the supporting cylinder 41 . Specific embodiment 7:

[0062] This embodiment adds a soot blowing mechanism 7 on the basis of specific embodiment 3. A soot blowing mechanism 7 is also provided between the support cylinder 41 and the middle support roller 5. The soot blowing mechanism 7 is arranged at the front part of the copper foil conveying path. The soot blowing mechanism 7 includes an upper soot blowing port and a lower soot blowing port. The upper soot blowing port and the lower soot blowing port are respectively located above and below the copper foil conveying path.

[0063] Can blow away the dust on the surface of copper foil before processing. Specific embodiment 8:

[0065] This embodiment further illustrates the end material pulling mechanism 6 on the basis of the specific embodiment 3, wherein the end material pulling mechanism 6 comprises a winding mechanism 61, an upper fixed roller row 62 and a lower sliding roller row 63, wherein the winding mechanism 61 is arranged at the discharge end, the upper fixed roller row 62 and the lower sliding roller row 63 are arranged in front of the winding mechanism 61, the upper fixed roller row 62 and the lower sliding roller row 63 are arranged side by side, the roller bodies of the upper fixed roller row 62 and the roller bodies of the lower sliding roller row 63 are arranged alternately, and the support plate of the lower sliding roller row 63 is slidably connected to the equipment mounting back plate through a slide rail.

[0066] Because welding takes time, sufficient welding time can be reserved by sliding the lower sliding roller row up and down through the end pulling mechanism. When the lower sliding roller row slides upward and approaches the upper fixed roller row, the winding mechanism will continue to wind up, but since the distance between the upper fixed roller row and the lower sliding roller row is closer, the stroke becomes shorter, and the winding mechanism winds up the extra part, so the copper foil at the welding table will not be pulled back. When the lower sliding roller row slides downward and away from the upper fixed roller row, the distance between the upper fixed roller row and the lower sliding roller row becomes farther, which can pull the copper foil at the welding table backward. Through the reciprocating operation of such a mechanism, the pulling process of the copper foil staying at the welding table for a period of time and then moving backward can be realized. Specific embodiment 9:

[0068] This embodiment further illustrates the welding table 1 based on the specific embodiment 2. The surface of the welding table 1 is a glass support table top. A welding table receiving roller 11 and a welding table feeding roller 12 are respectively provided on both sides of the welding table 1. Specific embodiment 10:

[0070] This embodiment further explains the welding table feed roller 12 on the basis of the specific embodiment 9. An electrostatic guide mechanism 10 is provided in front of the welding table feed roller 12. The electrostatic guide mechanism 10 includes a small guide roller. The bottom surface of the small guide roller is in contact with a grounded metal sheet. The bottom surface of the grounded metal sheet is connected to a grounded metal chain.

[0071] The impact of static electricity on laser welding is mainly reflected in the following aspects: 1. Static electricity may interfere with the stability of the laser beam, resulting in deviation or instability during the welding process; 2. Static electricity may also cause defects in the welding process, such as pores and cracks, thereby affecting the quality and strength of the welded joint; 3. Electrostatic discharge may also damage the electronic components of the laser welding equipment and shorten the service life of the equipment. Therefore, before laser welding, we need to reduce the hazards of static electricity as much as possible. During the transportation process, the copper foil will definitely generate a lot of static electricity due to friction with various structures. Therefore, in this solution, a static electricity conduction mechanism is specially set up to conduct away as much static electricity as possible before welding, solving the above-mentioned problems.

[0072] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A copper foil conductor lug welding method, characterized in that: The method comprises the following steps: A. fixing the copper foil roll on the feed end of the laser welding equipment, and placing the conductive electrode ear on the feeding mechanism of the conductive electrode ear; B. pulling out the copper foil on the copper foil roll so that it moves along the operation route and then connected with the pulling mechanism at the discharge end of the laser welding equipment; C. adjusting the focal length of the optical fiber galvanometer welding machine on the laser welding equipment, and starting the laser welding equipment to perform continuous laser welding operations after adjustment.

2. The laser welding equipment used in the copper foil conductor ear welding method according to claim 1 is characterized in that: The invention comprises a roller copper foil conveying mechanism and a laser welding mechanism, wherein the laser welding mechanism is arranged in the middle of the roller copper foil conveying mechanism, and the laser welding mechanism comprises a welding table (1), an optical fiber galvanometer welding machine (2) and a conductive electrode ear pressing mechanism (3), wherein the optical fiber galvanometer welding machine (2) is arranged above the welding table (1), and the conductive electrode ear pressing mechanism (3) is arranged between the optical fiber galvanometer welding machine (2) and the welding table (1), and a conductive electrode ear feeding port is arranged at the equipment installation back plate at the inner end of the welding table (1), and a cylinder type pushing structure (8) is arranged at the inner end of the conductive electrode ear feeding port.

3. The laser welding equipment according to claim 2, characterized in that: The roller-type copper foil conveying mechanism comprises a feed-end copper foil reel support mechanism (4), an intermediate support roller (5) and a terminal pulling mechanism (6) which are arranged in sequence from front to back.

4. The laser welding equipment according to claim 3, characterized in that: The feed end copper foil roll support mechanism (4) comprises a support cylinder (41) and a copper foil roll limiting mechanism (42); the support cylinder (41) is arranged at the lower part of the feed end of the equipment installation back plate; the copper foil roll limiting mechanism (42) comprises a limiting head (421) and a limiting head positioning mechanism (422); the limiting head (421) is arranged at the outer end of the support cylinder (41); the limiting head (421) is detachably connected to the support cylinder (41) via the limiting head positioning mechanism (422).

5. The laser welding equipment according to claim 4, characterized in that: The limit head (421) is plugged into the outer end of the support cylinder (41); a positioning plug hole is provided at the bottom of the limit head (421); the limit head positioning mechanism (422) comprises a horizontal telescopic support rod and a vertical connection positioning rod; the inner end of the horizontal telescopic support rod is fixedly connected to the equipment installation back plate; the vertical connection positioning rod is arranged at the outer end of the horizontal telescopic support rod; the vertical positioning rod is threadedly connected to the horizontal telescopic support rod; the upper part of the vertical positioning rod is adapted to the positioning plug hole; when the vertical positioning rod is at the uppermost position, its upper part is inserted into the positioning plug hole.

6. The laser welding equipment according to claim 4, characterized in that: A height-adjustable lifting copper foil roll support roller (9) is also provided below the support cylinder (41).

7. The laser welding equipment according to claim 4, characterized in that: A soot blowing mechanism (7) is also provided between the support cylinder (41) and the intermediate support roller (5), the soot blowing mechanism (7) being arranged at the front of the copper foil conveying path, the soot blowing mechanism (7) comprising an upper soot blowing port and a lower soot blowing port, the upper soot blowing port and the lower soot blowing port being respectively located above and below the copper foil conveying path.

8. The laser welding equipment according to claim 3, characterized in that: The end material pulling mechanism (6) comprises a winding mechanism (61), an upper fixed roller row (62) and a lower sliding roller row (63); the winding mechanism (61) is arranged at the material discharging end; the upper fixed roller row (62) and the lower sliding roller row (63) are arranged in front of the winding mechanism (61); the upper fixed roller row (62) and the lower sliding roller row (63) are arranged side by side; the roller body of the upper fixed roller row (62) and the roller body of the lower sliding roller row (63) are arranged alternately; and the support plate of the lower sliding roller row (63) is slidably connected to the equipment mounting back plate via a slide rail.

9. The laser welding equipment according to claim 2, characterized in that: The surface of the welding table (1) is a glass support table top, and welding table receiving rollers (11) and welding table feeding rollers (12) are respectively provided on two sides of the welding table (1).

10. The laser welding equipment according to claim 9, characterized in that: An electrostatic conduction mechanism (10) is provided in front of the welding table feed roller (12), the electrostatic conduction mechanism (10) comprising a small conduction roller, the bottom surface of the small conduction roller is in contact with a grounded metal sheet, and the bottom surface of the grounded metal sheet is connected to a grounded metal chain.

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