Laser welding equipment for large CTP (computer to plate) battery wrapping piece

Abstract

The invention relates to a large CTP battery wrapping piece laser welding device which comprises a lower rack assembly, a three-axis portal frame and a vibration lens assembly, the three-axis portal frame is installed on the lower rack assembly, and the vibration lens assembly is installed on the three-axis portal frame; a roller conveying line is arranged on the right side of the lower rack body, and a product positioning tray assembly is placed on the roller conveying line. The large CTP battery pack large-breadth chip laser welding machine can be suitable for large CTP battery pack large-breadth chip laser welding, the product positioning tray assembly carries out transportation through the roller conveying line and the friction wheel conveying mechanism, and the large CTP battery pack large-breadth chip laser welding machine is high in load, high in efficiency, low in cost, low in failure rate and easy to maintain.

Description

Technical Field

[0001] The present invention relates to the technical field related to battery pack processing, and in particular to a large-scale CTP battery pack bar laser welding device. Background Art

[0002] The specifications of new energy battery packs are getting larger and larger. The most prominent large CTP battery pack can be 1.5 meters wide and 2.3 meters long. In the pack assembly stage, the aluminum bar welding process, the pallet belt product adopts a through-type structure, and the pallet needs to be positioned in place. The pallet is relatively large in size and weight. The commonly used structure is a large jacking and positioning mechanism. This mechanism is costly and affects the beat. The positioning mechanism has a large format, a large load, and a high failure rate. The later maintenance of the transmission parts is very complicated.

[0003] In view of the above-mentioned defects, the designers actively carried out research and innovation in order to create a large-scale CTP battery pack laser welding equipment to make it more valuable for industrial use. Summary of the invention

[0004] In order to solve any of the above-mentioned technical problems, the object of the present invention is to provide a large-scale CTP battery pack laser welding equipment.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] Large-scale CTP battery pack laser welding equipment, including a lower frame assembly, a three-axis gantry and a galvanometer lens assembly. The three-axis gantry is installed on the lower frame assembly, and the galvanometer lens assembly is installed on the three-axis gantry;

[0007] The lower frame assembly includes a lower frame body, a plurality of anchor screw brackets are installed at the bottom of the lower frame body, and a friction wheel conveying mechanism running along the left and right directions is installed on both the front and rear sides of the inner side of the lower frame body, and the friction wheel conveying mechanism includes a plurality of friction rollers uniformly distributed on the lower frame body along the left and right directions;

[0008] A roller conveyor line is arranged on the right side of the lower frame body, and a product positioning tray assembly is placed on the roller conveyor line;

[0009] The roller conveyor line includes a roller conveyor frame, on which a plurality of rollers running along the X-axis direction are mounted;

[0010] The product positioning tray assembly comprises a tray plate, four adjustable positioning blocks are installed in the middle of the tray plate, and the battery module is located on the tray plate between the four positioning blocks.

[0011] As a further improvement of the present invention, a laser chiller integrated cabinet is installed on one side of the lower frame body.

[0012] As a further improvement of the present invention, a plurality of wear-resistant sleeves are evenly distributed on the drum along the front-to-back direction.

[0013] As a further improvement of the present invention, a plurality of guide rollers are installed on the front and rear sides of the pallet plate, guide strips matching the above-mentioned guide rollers are installed on the roller conveyor frames on the front and rear sides of the roller, and a plurality of passive support wheels are evenly distributed along the left and right directions in the middle part of the inner side of the lower frame body.

[0014] As a further improvement of the present invention, at least one visual addressing reference column is installed on the pallet plate, and a plurality of lifting rings are installed on the pallet plate.

[0015] As a further improvement of the present invention, at least one clamping cylinder assembly is installed near the right side of the lower frame body, the clamping cylinder assembly includes a clamping cylinder and a clamping block that moves up and down under the drive of the clamping cylinder, and a limiting frame is installed near the left side of the lower frame body.

[0016] As a further improvement of the present invention, the three-axis gantry includes a plurality of columns installed on the lower frame body, two X-axis beams are installed on the columns, an X-axis linear motor module is installed on the X-axis beam, the X-axis linear motor module drives the Y-axis beam to move in the left and right directions, a Y-axis linear motor module is installed on the Y-axis beam, the galvanometer lens assembly includes a front pad and a Z-axis linear motor module, the Y-axis linear motor module drives the Z-axis linear motor module to move in the front and rear directions, and the Z-axis linear motor module drives the galvanometer lens processing mechanism installed on the front pad to move in the vertical direction.

[0017] As a further improvement of the present invention, at least one auxiliary beam is installed between the two X-axis beams, the Y-axis beam is connected to the X-axis drag chain assembly installed on the X-axis beam, the Z-axis linear motor module is connected to the Y-axis drag chain assembly installed on the Y-axis beam, and the front pad is connected to the Z-axis drag chain assembly installed on the Z-axis linear motor module.

[0018] As a further improvement of the present invention, the galvanometer lens processing mechanism includes a galvanometer lens installed on a front pad, a visual camera assembly, a laser ranging sensor, a dust extraction port, a copper nozzle and a dustproof double-layer air knife.

[0019] As a further improvement of the present invention, a slide cylinder installed on the front pad drives the laser ranging sensor to move in the front-rear direction.

[0020] By means of the above scheme, the present invention has at least the following advantages:

[0021] The present invention can be applied to large-format laser welding of large-format bars of large CTP battery packs. The product positioning tray assembly is transported through a roller conveyor line and a friction wheel conveyor mechanism, and has high load, high efficiency, low cost, low failure rate, and easy maintenance.

[0022] After the product positioning tray assembly of the present invention is in place, positioning processing is performed through a limiting frame and a clamping cylinder assembly, and the operation is simple and convenient to use.

[0023] The laser distance measurement of the present invention is carried out coaxially by using a distance measurement sensor, a copper nozzle and a galvanometer lens.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of a large-scale CTP battery pack laser welding device of the present invention;

[0027] Figure 2 yes Figure 1 A schematic diagram of the structure of the middle and lower frame assembly;

[0028] Figure 3 yes Figure 1 Structural diagram of the middle roller conveyor line;

[0029] Figure 4 yes Figure 1 A schematic diagram of the structure of the product positioning tray assembly;

[0030] Figure 5 yes Figure 2 A partial enlarged structural diagram of the middle clamping cylinder assembly;

[0031] Figure 6 yes Figure 1 Structural diagram of the central three-axis gantry;

[0032] Figure 7 yes Figure 1 A schematic diagram of the structure of the center vibration lens assembly;

[0033] Figure 8 It is a schematic structural diagram of a battery module to be processed according to the present invention.

[0034] The meanings of the various reference numerals in the figures are as follows.

[0035] Lower frame assembly 1, three-axis gantry 2, roller conveyor line 3, product positioning tray assembly 4, laser chiller integrated cabinet 5, galvanometer lens assembly 6, lower frame body 7, friction wheel conveying mechanism 8, anchor screw bracket 9, wear-resistant sleeve 10, roller 11, roller conveyor frame 12, guide bar 13, pallet plate 14, visual addressing reference column 15, lifting ring 16, guide roller 17, battery module 18, positioning block 19, friction roller 20, clamping cylinder assembly 21, passive support wheel 22. X-axis linear motor module 23. column 24. X-axis crossbeam 25. auxiliary crossbeam 26. X-axis drag chain assembly 27. Y-axis crossbeam 28. Y-axis linear motor module 29. Y-axis drag chain assembly 30. front pad 31. galvanometer lens 32. visual camera assembly 33. laser ranging sensor 34. dust extraction port 35. copper nozzle 36. slide cylinder 37. dustproof double-layer air knife 38. Z-axis drag chain assembly 39. Z-axis linear motor module 40. bar welding point 41. limit frame 42. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. The components of the embodiment of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiment of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0038] like Figures 1 to 8 As shown, a large-scale CTP battery pack laser welding equipment includes a lower frame assembly 1, a three-axis gantry 2 and a galvanometer head assembly 6. The three-axis gantry 2 is installed on the lower frame assembly 1, and the galvanometer head assembly 6 is installed on the three-axis gantry 2. A roller conveyor line 3 is arranged on the right side of the lower frame body 7, and a product positioning tray assembly 4 is placed on the roller conveyor line 3. A laser chiller integrated cabinet 5 is installed on one side of the lower frame body 7.

[0039] 1. The lower frame assembly 1 includes a lower frame body 7, a plurality of anchor screw brackets 9 are installed at the bottom of the lower frame body 7, and friction wheel conveying mechanisms 8 running along the left and right directions are installed on the front and rear sides of the inner side of the lower frame body 7. The friction wheel conveying mechanism 8 includes a plurality of friction rollers 20 uniformly distributed on the lower frame body 7 along the left and right directions.

[0040] At least one clamping cylinder assembly 21 is installed near the right side of the lower frame body 7. The clamping cylinder assembly 21 includes a clamping cylinder and a clamping block that moves up and down under the drive of the clamping cylinder. A limit frame 42 is installed near the left side of the lower frame body 7.

[0041] 2. The roller conveyor line 3 includes a roller conveyor frame 12, on which a plurality of rollers 11 running along the X-axis direction are mounted. A plurality of wear-resistant sleeves 10 are evenly distributed on the rollers 11 along the front-rear direction.

[0042] 3. Product Positioning The tray assembly 4 includes a tray plate 14 , and four adjustable positioning blocks 19 are installed in the middle of the tray plate 14 . The battery module 18 is located on the tray plate 14 between the four positioning blocks 19 .

[0043] A plurality of guide rollers 17 are installed on the front and rear sides of the pallet plate 14, guide strips 13 compatible with the guide rollers 17 are installed on the roller conveyor frame 12 on the front and rear sides of the roller 11, and a plurality of passive support wheels 22 are evenly distributed along the left and right directions in the middle of the inner side of the lower frame body 7.

[0044] At least one visual addressing reference column 15 is installed on the pallet plate 14 , and a plurality of lifting rings 16 are installed on the pallet plate 14 .

[0045] 4. The three-axis gantry 2 includes a plurality of columns 24 installed on the lower frame body 7, two X-axis beams 25 are installed on the columns 24, an X-axis linear motor module 23 is installed on the X-axis beam 25, the X-axis linear motor module 23 drives the Y-axis beam 28 to move in the left and right directions, and a Y-axis linear motor module 29 is installed on the Y-axis beam 28. The galvanometer lens assembly 6 includes a front pad 31 and a Z-axis linear motor module 40, the Y-axis linear motor module 29 drives the Z-axis linear motor module 40 to move in the front and rear directions, and the Z-axis linear motor module 40 drives the galvanometer lens processing mechanism installed on the front pad 31 to move in the vertical direction.

[0046] At least one auxiliary beam 26 is installed between the two X-axis beams 25, the Y-axis beam 28 is connected to the X-axis drag chain assembly 27 installed on the X-axis beam 25, the Z-axis linear motor module 40 is connected to the Y-axis drag chain assembly 30 installed on the Y-axis beam 28, and the front pad 31 is connected to the Z-axis drag chain assembly 39 installed on the Z-axis linear motor module 40.

[0047] The galvanometer lens processing mechanism includes a galvanometer lens 32 mounted on the front pad 31, a visual camera assembly 33, a laser ranging sensor 34, a dust extraction port 35, a copper nozzle 36 and a dustproof double-layer air knife 38. The slide cylinder 37 mounted on the front pad 31 drives the laser ranging sensor 34 to move in the front and rear directions.

[0048] The present invention provides a device which can automatically transport and position a large battery pack, automatically visually address, automatically measure the height, and automatically weld a bar. The device adopts a square steel pipe welding frame, an XYZ three-axis linear motion gantry structure, a high-precision visual camera and a ranging sensor are installed on the Z axis, a dust suction pipe interface is provided above the bar pressing copper nozzle, and an explosion-proof dust collector and purifier is connected to the outside of the dust extraction port to prevent smoke generated during welding from polluting the environment.

[0049] Bar welding point 41,

[0050] like Figure 8 , schematic diagram of the welding position of the square shell battery cell bar (i.e., the bar welding position 41).

[0051] like Figure 1 The Z-axis galvanometer lens assembly 6 is installed on the three-axis gantry 2, the three-axis gantry 2 is installed on the lower frame assembly 1, the roller conveyor line 3 is installed on the lower frame assembly 1, the product positioning tray 4 flows from right to left on the roller conveyor line 3 into the welding area, and the laser chiller integrated cabinet 5 is placed on the side of the lower frame assembly 1.

[0052] like Figure 2 The precision friction wheel conveying mechanism 8 is installed on the processing surface of the lower frame body 7. The precision friction wheel conveying mechanism 8 includes three rows of precision support rollers. The friction roller 20 is chain-driven. The passive support wheel 22 is not equipped with power, and plays a role in supporting the middle of the pallet from sinking. The upper surface of the guide wheel has a high flatness. After the pallet is in place, the blocking mechanism (i.e., the limit frame 42) blocks the pallet plate 14. No jacking is required. Only the pallet plate 14 needs to be fastened to visually address, and then the pallet is welded. The anchor screw bracket 9 is connected to the lower frame body 7 to prevent the equipment from moving.

[0053] like Figure 3 The integral roller conveyor frame 12 has guide strips 13 on both sides, and a wear-resistant sleeve 10 is installed on the roller 11 to protect the bottom surface of the pallet plate 14.

[0054] like Figure 4, product positioning pallet schematic diagram, visual addressing reference column 15 is installed on the pallet plate 14, the upper surface of the pallet plate 14 is insulated, and threaded holes are reserved to meet the maximum product compatible clamping. The product schematic 18 is placed on the pallet plate 14, and the four sides are limited by positioning blocks 19. Each pallet is equipped with four replacements 19, and the installation position of the replacement 19 can be adjusted. Guide rollers 17 are installed at the four corners of the pallet plate 14, which makes the conveyor line flow smoother and less stuck.

[0055] like Figure 5 An enlarged schematic diagram of the pallet positioning mechanism shows that the pallet plate 14 is circulated on the conveyor line. After the hard limit stop frame 42 stops the pallet plate 14, the strong clamping cylinder assembly 21 at the tail of the pallet plate 14 fastens the pallet plate 14 and has its own mechanical self-locking function, which will not loosen when the power is cut off or the air is cut off.

[0056] like Figure 6 As shown in the schematic diagram of the three-axis gantry, six columns 24 are connected to two X-axis beams 25 by screws, an auxiliary beam 26 is connected to two columns 24 by screws, an X-axis drag chain assembly 27 is connected to the X-axis beam 25, an X-axis linear motor module 23 is mounted on the X-axis beam 25, a Y-axis linear motor module 29 is mounted on the Y-axis beam 28, a Y-axis drag chain assembly 30 is mounted on the Y-axis beam 28, and a Z-axis galvanometer lens assembly 6 is mounted on the Y-axis linear motor module 29.

[0057] like Figure 7 The schematic diagram of the galvanometer lens assembly 6 is shown, the front pad 31 is installed on the Z-axis linear motor module 40, the galvanometer lens 32 is installed on the front pad 31, the visual camera assembly 33 is installed on the front pad 31, the Z-axis drag chain assembly is installed on the front pad 31, the dust-proof double-layer air knife 38 is installed on the galvanometer lens 32, the slide cylinder 37 is installed on the front pad 31, and the laser ranging sensor 34 is installed on the slide cylinder 37, which can realize coaxial ranging with the copper nozzle 36. The copper nozzle 36 is installed on the front pad 31, and the dust extraction port 35 is installed above the copper nozzle 36. Dust extraction starts during laser welding, and the dust extraction port is connected to the workshop dust collector through a hose.

[0058] After the equipment is started, the pallet plate 14 with the product battery module 18 flows from the roller conveyor line 3 to the welding area, the limit frame 42 stops the pallet plate 14, the strong clamping cylinder assembly 21 at the tail of the pallet plate 14 fastens the pallet, and the three-axis gantry drives the vibration lens assembly 6 to start visual addressing. After addressing, the copper nozzle 36 is automatically positioned to the welding point, and the laser ranging sensor 34 extends out to measure the upper surface of the clamped state of the pallet, and automatically compensates for the laser defocus. After ranging, the laser ranging sensor 34 retracts without blocking the laser, and laser welding of the pallet starts. After welding, the strong clamping cylinder assembly 21 at the tail of the pallet plate 14 releases the pallet, the limit frame 42 descends, and the pallet plate 14 flows into the next process.

[0059] The X-axis direction described in this article is as follows Figure 1 The left and right directions shown in the figure are the Y-axis directions described in this article. Figure 1 The Z-axis direction in this article is as shown in the front-to-back direction. Figure 1 The up and down directions shown in .

[0060] The present invention can be applied to large-format laser welding of large-format CTP battery packs. The product positioning tray assembly is transported through a roller conveyor line and a friction wheel conveyor mechanism. It has high load, high efficiency, low cost, low failure rate, and easy maintenance. After the product positioning tray assembly is in place, it is positioned by a limit frame and a clamping cylinder assembly. The operation is simple and easy to use. The laser distance measurement is coaxially measured by a distance sensor, a copper nozzle, and a galvanometer lens.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 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 for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0062] 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, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A large-scale CTP battery pack laser welding device, comprising a lower frame assembly (1), a three-axis gantry (2) and a galvanometer head assembly (6), wherein the three-axis gantry (2) is mounted on the lower frame assembly (1), and the galvanometer head assembly (6) is mounted on the three-axis gantry (2); characterized in that: The lower frame assembly (1) comprises a lower frame body (7), a plurality of anchor screw brackets (9) are installed at the bottom of the lower frame body (7), and a friction wheel conveying mechanism (8) running along the left and right directions is installed on both the front and rear sides of the inner side of the lower frame body (7), and the friction wheel conveying mechanism (8) comprises a plurality of friction rollers (20) uniformly distributed on the lower frame body (7) along the left and right directions; A roller conveyor line (3) is arranged on the right side of the lower frame body (7), and a product positioning tray assembly (4) is placed on the roller conveyor line (3); The roller conveyor line (3) comprises a roller conveyor frame (12), on which a plurality of rollers (11) running along the X-axis direction are mounted; The product positioning tray assembly (4) comprises a tray plate (14), four adjustable positioning blocks (19) are installed in the middle of the tray plate (14), and the battery module (18) is located on the tray plate (14) between the four positioning blocks (19).

2. The large-scale CTP battery pack laser welding equipment according to claim 1 is characterized in that: A laser chiller integrated cabinet (5) is installed on one side of the lower frame body (7).

3. The large-scale CTP battery pack laser welding equipment according to claim 1 is characterized in that: A plurality of wear-resistant sleeves (10) are evenly distributed on the roller (11) along the front-rear direction.

4. The large-scale CTP battery pack laser welding equipment according to claim 1 is characterized in that: A plurality of guide rollers (17) are installed on both the front and rear sides of the tray plate (14), guide strips (13) adapted to the guide rollers (17) are installed on the roller conveyor frames (12) on both the front and rear sides of the roller (11), and a plurality of passive support wheels (22) are evenly distributed along the left and right directions in the middle of the inner side of the lower frame body (7).

5. The large-scale CTP battery pack laser welding equipment according to claim 1 is characterized in that: At least one visual addressing reference column (15) is installed on the pallet plate (14), and a plurality of lifting rings (16) are installed on the pallet plate (14).

6. The large-scale CTP battery pack laser welding equipment according to claim 1, characterized in that: At least one clamping cylinder assembly (21) is installed near the right side of the lower frame body (7), the clamping cylinder assembly (21) comprising a clamping cylinder and a clamping block that moves up and down under the drive of the clamping cylinder, and a limiting frame (42) is installed near the left side of the lower frame body (7).

7. The large-scale CTP battery pack laser welding equipment according to claim 1, characterized in that: The three-axis gantry (2) comprises a plurality of columns (24) mounted on a lower frame body (7), two X-axis beams (25) are mounted on the columns (24), an X-axis linear motor module (23) is mounted on the X-axis beam (25), the X-axis linear motor module (23) drives the Y-axis beam (28) to move in the left-right direction, a Y-axis linear motor module (29) is mounted on the Y-axis beam (28), the galvanometer lens assembly (6) comprises a front pad (31) and a Z-axis linear motor module (40), the Y-axis linear motor module (29) drives the Z-axis linear motor module (40) to move in the front-back direction, and the Z-axis linear motor module (40) drives the galvanometer lens processing mechanism mounted on the front pad (31) to move in the vertical direction.

8. The large-scale CTP battery pack laser welding equipment as claimed in claim 7, characterized in that: At least one auxiliary beam (26) is installed between the two X-axis beams (25); the Y-axis beam (28) is connected to an X-axis drag chain assembly (27) installed on the X-axis beam (25); the Z-axis linear motor module (40) is connected to a Y-axis drag chain assembly (30) installed on the Y-axis beam (28); and the front pad (31) is connected to a Z-axis drag chain assembly (39) installed on the Z-axis linear motor module (40).

9. The large-scale CTP battery pack laser welding equipment according to claim 7, characterized in that: The galvanometer lens processing mechanism comprises a galvanometer lens (32) mounted on a front pad (31), a visual camera assembly (33), a laser distance sensor (34), a dust extraction port (35), a copper nozzle (36) and a dustproof double-layer air knife (38).

10. The large-scale CTP battery pack laser welding equipment according to claim 9, characterized in that: A slide cylinder (37) mounted on the front pad (31) drives the laser distance sensor (34) to move in the front-rear direction.

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