Chip laser welding device compatible with cylindrical and square shell battery cell modules

Abstract

The invention relates to a chip laser welding device compatible with a cylinder and square shell battery cell module. The chip laser welding device comprises laser welding equipment and a laser arranged on a laser placing frame; the laser welding equipment comprises a laser welding table, and a laser welding mechanism, a turnover mechanism, an X-axis conveying line and a Y-axis conveying line are installed on the laser welding table. The laser welding device is compatible with square shell battery cell module and cylindrical battery cell module sheet laser welding and compatible with cylindrical battery cell module front and back sheet laser welding, the production efficiency is greatly improved, the equipment cost is reduced, and the competitiveness of the laser welding technology in the new energy industry is improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to battery cell module processing, and in particular to a laser welding device for bar sheets that is compatible with cylindrical and square shell battery cell modules. Background Art

[0002] With the rapid development of the new energy industry in recent years, laser welding technology has been widely used in recent years. In traditional welding technologies, such as resistance welding and arc welding, there are problems such as unstable welding quality, large heat-affected zone, and insufficient weld strength. With the continuous improvement of the new energy industry's requirements for battery module performance and safety, laser welding has gradually become the mainstream technology for new energy battery module welding due to its significant advantages such as concentrated energy, fast welding speed, narrow weld, small heat-affected zone, small welding deformation, and high welding strength. Laser welding can achieve high-precision and high-quality welding, effectively improve the sealing performance and electrical connection reliability of the battery module, reduce internal resistance, and increase the energy density and service life of the battery.

[0003] In summary, the problems existing in the prior art are:

[0004] The existing laser welding equipment has a single function and can only weld square shell battery cell modules or cylindrical battery cell modules. It is not compatible with both square shell battery cell modules and cylindrical battery cell modules. This has hindered the development of laser welding technology in the new energy industry and increased the equipment costs of enterprises.

[0005] In view of the above-mentioned defects, the designer actively carried out research and innovation in order to create a laser welding device for the bar that is compatible with cylindrical and square shell battery modules, making it more valuable for industrial use. Summary of the invention

[0006] In order to solve any of the above technical problems, the purpose of the present invention is to provide a laser welding device for bar sheets that is compatible with cylindrical and square shell battery cell modules.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] A laser welding device for a bar compatible with cylindrical and square shell battery modules, including a laser welding device and a laser mounted on a laser placement rack;

[0009] The laser welding equipment includes a laser welding table, on which a laser welding mechanism, a flip mechanism, an X-axis conveying line and a Y-axis conveying line are installed;

[0010] The X-axis conveyor line is located on the laser welding table below the laser welding mechanism. The X-axis conveyor line drives the X-axis pallet to move in the X-axis direction. The X-axis pallet is used to carry the square shell battery cells.

[0011] The flipping mechanism is located on the laser welding table on the negative side of the laser welding mechanism along the Y-axis. The Y-axis conveyor line is located on the laser welding table below the flipping mechanism. The Y-axis conveyor line drives the Y-axis pallet to move in the Y-axis direction. The Y-axis pallet is used to carry cylindrical battery cells.

[0012] As a further improvement of the present invention, an explosion-proof dust collector and a water cooler are also installed on one side of the laser.

[0013] As a further improvement of the present invention, a welding equipment cover is installed on the outer side of the laser welding table, and a grating and a start button are installed on the laser welding table outside the flip mechanism.

[0014] As a further improvement of the present invention, the laser welding mechanism includes a Y-axis linear motion module installed on the laser welding table through a column, the Y-axis linear motion module drives the inner X-axis linear motion module to move in the Y-axis direction, the X-axis linear motion module drives the Z-axis linear motion module to move in the X-axis direction, and the Z-axis linear motion module drives the laser processing component to move in the Z-axis direction.

[0015] As a further improvement of the present invention, the laser processing component includes a galvanometer component, a distance measuring sensor and a CCD vision component.

[0016] As a further improvement of the present invention, the laser processing assembly also includes an air knife assembly and a dust suction device.

[0017] As a further improvement of the present invention, the laser processing assembly also includes a clamping mechanism.

[0018] As a further improvement of the present invention, the flipping mechanism includes a lower mounting plate and an upper mounting plate. Upper mounting plates are arranged above both sides of the lower mounting plate. The lower mounting plate is connected to the upper upper mounting plate through a screw assembly. The lifting servo motor installed in the middle of the lower mounting plate drives the upper upper mounting plate to move in the Z-axis direction through a belt drive assembly and a screw assembly in turn. A flipping cylinder is installed on the outer side of the upper mounting plate. The flipping cylinder drives the inner clamping cylinder to flip. The two sides of the clamping cylinder are connected to the inner clamping tooling plate through clamping claws to achieve clamping of the cylindrical battery cell.

[0019] As a further improvement of the present invention, guide shafts are installed at the bottom of the upper mounting plates on both sides of the screw assembly, and the guide shafts are connected to the bearing seats installed on the lower mounting plate directly below.

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

[0021] The present invention is compatible with the laser welding of square shell battery cell modules and cylindrical battery cell module tabs, and is compatible with the laser welding of front and back tabs of cylindrical battery cell modules, which greatly improves production efficiency, reduces equipment costs, and improves the competitiveness of laser welding technology in the new energy industry.

[0022] 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

[0023] 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.

[0024] Figure 1 It is a structural schematic diagram of a laser welding device for a bar that is compatible with cylindrical and square shell battery modules of the present invention;

[0025] Figure 2 yes Figure 1 Structural diagram of laser welding equipment;

[0026] Figure 3 yes Figure 2 Schematic diagram of the internal structure;

[0027] Figure 4 yes Figure 3 The structural diagram of the other side;

[0028] Figure 5 yes Figure 3 Structural schematic diagram of the laser welding mechanism;

[0029] Figure 6 yes Figure 3 The structural diagram of the flipping mechanism;

[0030] Figure 7 It is a schematic diagram of the structure of the square shell battery cell applied to the present invention;

[0031] Figure 8 It is a schematic diagram of the structure of the cylindrical battery cell used in the present invention.

[0032] The meanings of the various reference numerals in the figures are as follows.

[0033] Laser welding equipment 1, laser 2, explosion-proof dust collector 3, water cooler 4, laser placement rack 5, welding equipment cover 6, laser welding mechanism 7, flip mechanism 8, grating 9, start button 10, laser welding table 11, X-axis conveyor line 12, X-axis pallet 13, square shell battery cell 14, Y-axis conveyor line 15, Y-axis pallet 16, cylindrical battery cell 17, column 18, Y-axis linear motion module 19, X-axis linear motion module 20, Z-axis linear motion module 21, galvanometer assembly 22, ranging sensor 23, CCD vision assembly 24, wind knife assembly 25, dust suction device 26, clamping mechanism 27, lower mounting plate 28, lifting servo motor 29, screw assembly 30, upper mounting plate 31, guide shaft 32, bearing seat 33, flip cylinder 34, clamping cylinder 35, clamping claw 36, clamping tooling plate 37, and bar 38. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] like Figures 1 to 8 As shown, a laser welding device for a bar compatible with cylindrical and square shell battery modules includes a laser welding device 1 and a laser 2 mounted on a laser placement frame 5. The laser welding device 1 includes a laser welding table 11, on which a laser welding mechanism 7, a flip mechanism 8, an X-axis conveyor line 12, and a Y-axis conveyor line 15 are mounted.

[0037] The X-axis conveyor line 12 is located on the laser welding table 11 below the laser welding mechanism 7 . The X-axis conveyor line 12 drives the X-axis tray 13 to move in the X-axis direction. The X-axis tray 13 is used to carry the square shell battery cells 14 .

[0038] The flipping mechanism 8 is located on the laser welding table 11 on the negative side of the laser welding mechanism 7 along the Y-axis. The Y-axis conveyor line 15 is located on the laser welding table 11 below the flipping mechanism 8. The Y-axis conveyor line 15 drives the Y-axis tray 16 to move in the Y-axis direction. The Y-axis tray 16 is used to carry the cylindrical battery cell 17.

[0039] An explosion-proof dust collector 3 and a water cooler 4 are also installed on one side of the laser 2. A welding equipment cover 6 is installed on the outside of the laser welding table 11, and a grating 9 and a start button 10 are installed on the laser welding table 11 outside the flip mechanism 8.

[0040] The laser welding mechanism 7 includes a Y-axis linear motion module 19 installed on the laser welding table 11 through a column 18. The Y-axis linear motion module 19 drives the inner X-axis linear motion module 20 to move in the Y-axis direction. The X-axis linear motion module 20 drives the Z-axis linear motion module 21 to move in the X-axis direction. The Z-axis linear motion module 21 drives the laser processing component to move in the Z-axis direction.

[0041] The laser processing assembly includes a galvanometer assembly 22, a distance sensor 23, a CCD visual assembly 24, an air knife assembly 25, a dust collecting device 26 and a clamping mechanism 27. The above structural components are all commonly used structural components in the art, and the functions and models are not described here.

[0042] The flipping mechanism 8 includes a lower mounting plate 28 and an upper mounting plate 31. Upper mounting plates 31 are arranged above both sides of the lower mounting plate 28. The lower mounting plate 28 is connected to the upper upper mounting plate 31 through a screw assembly 30. The lifting servo motor 29 installed in the middle of the lower mounting plate 28 drives the upper upper mounting plate 31 to move in the Z-axis direction through the belt transmission assembly and the screw assembly 30 in turn. A flipping cylinder 34 is installed on the outer side of the upper mounting plate 31. The flipping cylinder 34 drives the inner clamping cylinder 35 to flip. The two sides of the clamping cylinder 35 are connected to the inner clamping tooling plate 37 through the clamping claws 36 to achieve the clamping of the cylindrical battery cell 17.

[0043] Guide shafts 32 are installed at the bottom of the upper mounting plates 31 on both sides of the screw assembly 30, and the guide shafts 32 are connected to the bearing seats 33 installed on the lower mounting plate 28 directly below.

[0044] The first embodiment of the present invention:

[0045] The present invention provides a laser welding device that is compatible with the automatic welding of two types of batteries: square shell battery module and cylindrical battery module. This greatly improves production efficiency, reduces equipment costs, and improves the competitiveness of laser welding technology in the new energy industry. The laser welding of square shell battery module and cylindrical battery module are two different types of products. The front and back sides of the cylindrical battery module are compatible with automatic welding. The process requirements of square shell and cylindrical battery module are very different. There are bars 38 (CCS) on both sides of the cylindrical battery module. After installing the bar 38 on one side and entering the equipment for laser welding, install the bar on the other side and then perform laser welding on the other side.

[0046] In laser welding Figure 7 The square shell battery cell 14 and Figure 8 When the cylindrical battery cell 17 is shown, the battery cell module is placed on a tray and transported to a designated location via a double-speed chain conveyor line. The laser 2 provides a laser source, and under the guidance of the distance sensor 23 and the CCD visual component 24, the Y-axis linear motion module 19, the X-axis linear motion module 20 and the Z-axis linear motion module 21 drive the galvanometer component 22 to move. After reaching the position, the clamping mechanism 27 clamps the bar 38, and the air knife component 25 blows air to perform laser welding.

[0047] When welding the square shell battery cell 14, the cylindrical battery cell 17 is in the rising position, and the square shell battery cell 14 is placed on the X-axis tray 13 and transported to the designated position through the X-axis conveyor line 12. The laser 2 provides a laser source, and under the guidance of the ranging sensor 23 and the CCD visual component 24, the galvanometer component 22 is driven to move through the Y-axis linear motion module 19, the X-axis linear motion module 20 and the Z-axis linear motion module 21. After reaching the position, the clamping mechanism 27 clamps the bar 38, and the air knife component 25 blows air to perform laser welding. In this process, the flipping mechanism 8 does not participate in its welding.

[0048] When welding the cylindrical battery cell 17, the cylindrical battery cell 17 is in the ascending position, and the cylindrical battery cell 17 is placed on the Y-axis tray 16 and transported to the designated position through the Y-axis conveyor line 15. The laser 2 provides a laser source, and under the guidance of the ranging sensor 23 and the CCD visual component 24, the galvanometer component 22 is driven to move through the Y-axis linear motion module 19, the X-axis linear motion module 20 and the Z-axis linear motion module 21. After reaching the position, the clamping mechanism 27 clamps the bar 38, and the air knife component 25 blows air to perform laser welding on one side of the cylindrical battery cell 17.

[0049] After the laser welding on one side is completed, the clamping cylinder 35 is released, the cylindrical battery cell 17 descends, and after the cylindrical battery cell 17 is clamped, the cylindrical battery cell 17 rises. The cylindrical battery cell 17 is flipped under the action of the flipping cylinder 34. After flipping 180°, the cylindrical battery cell 17 descends and is placed on the Y-axis tray 16. The module is moved out under the action of the Y-axis conveyor line 15, and the bar 38 on the other side of the cylindrical battery cell 17 is manually installed for laser welding.

[0050] When the welding of the other side of the cylindrical battery cell module is completed, the welding of the poles and tabs on both sides of the entire cylindrical battery cell module is completed, and the tray drives the module out of the welding station.

[0051] In this paper, the X-axis direction is Figure 3 The left and right directions shown in the figure are the Y-axis directions in this article. Figure 3 The front-to-back direction shown in FIG. 1 is the Z-axis direction in this article. Figure 3 The vertical direction shown in .

[0052] In addition, the solution of the present invention is not only applicable to laser welding, but also applicable to processing techniques such as CCS welding.

[0053] The present invention is compatible with the laser welding of square shell battery cell modules and cylindrical battery cell module tabs, and is compatible with the laser welding of front and back tabs of cylindrical battery cell modules, which greatly improves production efficiency, reduces equipment costs, and improves the competitiveness of laser welding technology in the new energy industry.

[0054] 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.

[0055] 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.

[0056] 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 laser welding device for a bar that is compatible with cylindrical and square shell battery modules, comprising a laser welding device (1) and a laser (2) mounted on a laser placement rack (5); characterized in that: The laser welding equipment (1) comprises a laser welding table (11), on which a laser welding mechanism (7), a flipping mechanism (8), an X-axis conveying line (12) and a Y-axis conveying line (15) are installed; The X-axis conveyor line (12) is located on a laser welding table (11) below the laser welding mechanism (7), and the X-axis conveyor line (12) drives the X-axis tray (13) to move in the X-axis direction, and the X-axis tray (13) is used to carry the square shell battery core (14); The flipping mechanism (8) is located on a laser welding table (11) on one side of the laser welding mechanism (7) along the negative direction of the Y axis, the Y-axis conveying line (15) is located on the laser welding table (11) below the flipping mechanism (8), the Y-axis conveying line (15) drives the Y-axis tray (16) to move in the Y-axis direction, and the Y-axis tray (16) is used to carry the cylindrical battery cell (17).

2. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 1, characterized in that: An explosion-proof dust collector (3) and a water cooler (4) are also installed on one side of the laser (2).

3. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 1, characterized in that: A welding equipment cover (6) is installed on the outer side of the laser welding table (11), and a grating (9) and a start button (10) are installed on the laser welding table (11) outside the flip mechanism (8).

4. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 1, characterized in that: The laser welding mechanism (7) comprises a Y-axis linear motion module (19) mounted on a laser welding table (11) via a column (18); the Y-axis linear motion module (19) drives an inner X-axis linear motion module (20) to move in the Y-axis direction; the X-axis linear motion module (20) drives a Z-axis linear motion module (21) to move in the X-axis direction; and the Z-axis linear motion module (21) drives a laser processing component to move in the Z-axis direction.

5. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 4, characterized in that: The laser processing component comprises a galvanometer component (22), a distance measuring sensor (23) and a CCD vision component (24).

6. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 5, characterized in that: The laser processing assembly also includes an air knife assembly (25) and a dust suction device (26).

7. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 5, characterized in that: The laser processing assembly also includes a clamping mechanism (27).

8. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 1, characterized in that: The flipping mechanism (8) comprises a lower mounting plate (28) and an upper mounting plate (31). Upper mounting plates (31) are arranged above both sides of the lower mounting plate (28). The lower mounting plate (28) is connected to the upper mounting plate (31) via a screw assembly (30). A lifting servo motor (29) installed in the middle of the lower mounting plate (28) drives the upper mounting plate (31) to move in the Z-axis direction via a belt transmission assembly and a screw assembly (30). A flipping cylinder (34) is installed on the outer side of the upper mounting plate (31). The flipping cylinder (34) drives the inner clamping cylinder (35) to flip. The two sides of the clamping cylinder (35) are connected to the inner clamping tooling plate (37) via clamping claws (36) to clamp the cylindrical battery cell (17).

9. The laser welding device for bar sheets compatible with cylindrical and square shell battery modules as claimed in claim 8, characterized in that: Guide shafts (32) are installed at the bottom of the upper mounting plates (31) on both sides of the screw assembly (30), and the guide shafts (32) are connected to the bearing seats (33) installed on the lower mounting plate (28) directly below.

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