A battery strap welding machine

Abstract

The present invention discloses a battery strap welding machine, which includes: a workbench, a forming plate disposed on the workbench, a positioning assembly disposed on the forming plate for positioning a stack module and a steel strip, a pressing-down assembly disposed on the workbench and above the positioning assembly for pressing the stack laminations, a forming assembly disposed in the workbench and below the forming plate for pressing and forming the steel strip, a steel strip bending assembly disposed on the pressing-down assembly for bending the steel strip in the radial direction, and a welding assembly disposed on the pressing-down assembly for welding the bent steel strip. The present invention solves the technical problems of complex assembly procedures, low reliability, and low efficiency in the existing fuel cell assembly process, and has the characteristics of simple structure and easy implementation.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and particularly relates to a battery strap welding machine. Background Art

[0002] A fuel cell is a device that directly converts chemical energy into electrical energy. Due to its high efficiency, zero emissions, and low start-up temperature, it is very suitable for transportation, stationary power generation, and portable fields. In recent years, countries around the world have been actively researching the application of fuel cells as power sources in the automotive field. Since the voltage of a single cell is small and cannot meet the power requirements of an automobile, several single cells need to be connected in series and assembled together to form a stack, and they are fastened by mechanical pressure. If the fastening pressure is too large, it is easy to cause stress concentration, resulting in rupture or deformation of key components such as membrane electrodes or plates, and even piercing and tearing. At the same time, it will also reduce the porosity of the gas diffusion layer, causing a series of problems such as gas leakage, performance degradation, and reduced lifespan. If the fastening pressure is too small, it is easy to increase the contact resistance, resulting in a decrease in the performance of the stack. Therefore, an appropriate fastening pressure is crucial for the performance, safety, and durability of the stack. Usually, complex fastening methods are prone to bring more stress concentration problems and cumbersome assembly procedures, with low reliability and efficiency. Summary of the Invention

[0003] In view of the above, the main purpose of the present invention is to provide a battery strap welding machine to solve the technical problems such as complex assembly procedures, low reliability, and low efficiency in the existing fuel cell assembly process.

[0004] To solve the above technical problems, the present invention provides a battery strap welding machine, including: a workbench, a forming plate disposed on the workbench, a positioning assembly disposed on the forming plate for positioning a stack module and a steel belt, a pressing-down assembly disposed on the workbench and above the positioning assembly for pressing the stack laminations, a forming assembly disposed in the workbench and below the forming plate for pressing and forming the steel belt, a steel belt bending assembly disposed on the pressing-down assembly for bending the steel belt in the radial direction, and a welding assembly disposed on the pressing-down assembly for welding the bent steel belt.

[0005] The positioning assembly includes: a loading bottom plate, a left positioning mechanism and a right positioning mechanism arranged on the loading bottom plate. The left positioning mechanism includes: a linear module, a positioning plate arranged on the linear module, a plurality of optical rod mounting seats respectively arranged on the positioning plate, an optical rod is respectively installed in each optical rod mounting seat, the other ends of the plurality of optical rods are respectively connected to a bearing plate, the bearing plate is fixedly connected to a connecting plate, at least one first guide rail is vertically arranged on the outer surface of the connecting plate, a slide support plate is slidably arranged on the first guide rail, a battery clamping cylinder for clamping the battery is installed on one of the optical rods, a top plate is arranged on the top of the slide support plate, and a battery lifting cylinder is installed inside the top plate; the structures of the left positioning mechanism and the right positioning mechanism are the same.

[0006] Bottom support plates are respectively arranged on both sides of the plurality of optical rod mounting seats on the positioning plate, and guide rods are arranged on the bottom support plates.

[0007] A plurality of steel strip guide bars for positioning steel strips are also arranged at intervals on the loading bottom plate.

[0008] The pressing-down assembly includes: a pair of support seats arranged on the workbench, drag chain plates respectively arranged on both sides of each support seat, a pair of first columns and a pair of second columns which are arranged inside the pair of support seats and are oppositely arranged, one end of the columns is fixedly arranged on the workbench, the other end of the columns is fixedly connected to an electric cylinder mounting seat, electric cylinder support connecting plates are respectively fixedly arranged on both sides of the electric cylinder mounting seat, a first pressing block and a second pressing block are respectively arranged on the first column and the pair of second columns, and a plurality of cell pressing blocks for pressing the cell stack are also arranged on the first pressing block and the second pressing block.

[0009] Two electric cylinder connecting blocks are respectively arranged at the edges between the two ends of the first pressing block and the second pressing block, a fixing plate is connected to the outside of the electric cylinder connecting block, and a pressing-down electric cylinder is installed on the fixing plate.

[0010] The bending assembly includes a first bending mechanism and a second bending mechanism. The first bending mechanism is arranged on the first pressing block, and the second bending mechanism is arranged on the second pressing block. The first bending mechanism includes: a bending mounting plate, a second guide rail moving along the X-axis arranged on the bending mounting plate, a forming cylinder mounting plate slidably arranged on the second guide rail, and a third guide rail moving along the Y-axis arranged on the forming cylinder mounting plate. A forming bracket is arranged on the third guide shaft, and a driving motor and a push rod lead screw driven by the driving motor are installed on the forming bracket; the structures of the first bending mechanism and the second bending mechanism are the same.

[0011] The welding assembly includes a welding mechanism disposed on the first pressing block, and a pressing and welding fixture disposed on the second pressing block for pressing the steel strip to cooperate with the welding mechanism for welding. The welding mechanism includes: a welding backing plate disposed on the first pressing block, a two-axis translation module disposed on the welding backing plate, an emitting head support seat slidably disposed on the Y-axis of the two-axis translation module, and a laser emitting head mounted on the emitting head support seat for emitting laser light.

[0012] The pressing and welding fixture includes: a pressing cylinder disposed on the second pressing block, a pressing head connecting plate movably disposed at the movable end of the pressing cylinder, and a plurality of pressing heads disposed on the pressing head connecting plate.

[0013] The pressing head includes: a welding pressing rod, a compression spring, a spring shaft, and a welding pressing block. The welding pressing rod is fixedly disposed on the pressing head connecting plate. One end of the spring shaft is connected to the welding pressing rod, and the other end of the spring shaft is connected to the welding pressing block. The compression spring is sleeved on the spring shaft and is located between the welding pressing rod and the welding pressing block.

[0014] Adopting the above technical solution, compared with the prior art, the beneficial effects produced by the present invention are as follows: The technical solution of the present invention is provided with a downward pressing assembly, a forming assembly, a steel strip bending assembly, and a welding assembly that work in cooperation. Therefore, the electric stack sheets can be automatically pressed, pressure formed, and then the bent steel strip can be welded to assemble the electric stack into one body. The entire process does not require manual intervention, thus greatly reducing the labor intensity and production cost and significantly improving the work efficiency. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of the present invention;

[0016] Figure 2 is the structural schematic diagram of the positioning assembly of the present invention;

[0017] Figure 3 is the structural schematic diagram of the left positioning mechanism of the present invention;

[0018] Figure 4 is another structural schematic diagram of the left positioning mechanism of the present invention;

[0019] Figure 5 is yet another structural schematic diagram of the left positioning mechanism of the present invention;

[0020] Figure 6 is the structural schematic diagram of the downward pressing assembly of the present invention;

[0021] Figure 7 The structural schematic diagram of the first bending mechanism of the present invention;

[0022] Figure 8 Another structural schematic diagram of the first bending mechanism of the present invention;

[0023] Figure 9 Structural schematic diagram of the welding assembly of the present invention;

[0024] Figure 10 Structural schematic diagram of the pressing and welding fixture of the present invention;

[0025] Figure 11 Structural schematic diagram of the welding mechanism of the present invention;

[0026] Figure 12 is Figure 10 Partial enlarged schematic diagram of... Detailed implementation manners

[0027] As Figures 1 to 12 As shown in the figure, a battery strap welding machine of the present invention includes a workbench 1, a forming plate 2 disposed on the workbench 1, a positioning assembly 3 disposed on the forming plate 2 for positioning the battery stack module and the steel strip, a pressing assembly 4 disposed on the workbench 1 and above the positioning assembly 3 for pressing the battery stack laminations, a forming assembly (not shown in the figure) disposed in the workbench 1 and below the forming plate 2 for pressing and forming the steel strip, a steel strip bending assembly 6 disposed on the pressing assembly 4 for bending the steel strip in the radial direction, and a welding assembly 7 disposed on the pressing assembly 4 for welding the bent steel strip.

[0028] As Figures 2 to 5 As shown in the figure, specifically, the positioning assembly 3 includes: a loading bottom plate 33, a left positioning mechanism 31 and a right positioning mechanism 32 disposed on the loading bottom plate 33. The left positioning mechanism 31 includes: a linear module 311, a positioning plate 312 disposed on the linear module 311, a plurality of optical rod mounting seats 313 respectively disposed on the positioning plate 312, an optical rod 314 respectively mounted in each optical rod mounting seat 313. The other ends of the plurality of optical rods 314 are respectively connected to a bearing plate 315. The bearing plate 315 is fixedly connected to a connecting plate 316. At least one first guide rail 317 is vertically disposed on the outer surface of the connecting plate 316. A slide table support plate 318 is slidably disposed on the first guide rail 317. A battery clamping cylinder 319 for clamping the battery is mounted on one of the optical rods 314. A top plate 320 is disposed at the top of the slide table support plate 318, and a battery lifting cylinder 321 is mounted inside the top plate; the structures of the left positioning mechanism 31 and the right positioning mechanism 32 are the same.

[0029] As Figure 5 As shown in the figure, bottom support plates 322 are respectively disposed on both sides of the plurality of optical rod mounting seats 313 on the positioning plate 312, and guide rods 323 are disposed on the bottom support plates 322.

[0030] As Figure 2 shown, a plurality of steel strip guide bars 324 for positioning the steel strip are also provided at intervals on the loading bottom plate 31.

[0031] As Figure 6 shown, the pressing-down assembly 4 includes: a pair of support seats 41 arranged on the workbench 1, drag chain plates 42 respectively arranged on both sides of each support seat 41, a pair of first columns 43 and a pair of second columns 44 which are arranged oppositely and located inside the pair of support seats 41, one end of the column 43 is fixedly arranged on the workbench 1, the other end of the column 43 is fixedly connected with an electric cylinder mounting seat, electric cylinder support connecting plates 45 are respectively fixedly arranged on both sides of the electric cylinder mounting seat, first pressing blocks 46 and second pressing blocks 47 are respectively arranged on the first column 43 and the pair of second columns 44, and a plurality of cell stack pressing blocks 48 for pressing the cell stack are further arranged on the first pressing blocks 46 and the second pressing blocks 47.

[0032] As Figure 6 , two electric cylinder connecting blocks 49 are respectively arranged at the edges between the two ends of the first pressing block 46 and the second pressing block 47, the outer sides of the electric cylinder connecting blocks 49 are connected with fixing plates 410, and a pressing-down electric cylinder 411 is installed on the fixing plates 410.

[0033] As Figure 1 , Figure 7 , Figure 8 shown, the bending assembly 6 includes a first bending mechanism 61 and a second bending mechanism 62, the first bending mechanism 61 is arranged on the first pressing block 46, the second bending mechanism 62 is arranged on the second pressing block 47, the first bending mechanism 61 includes: a bending mounting plate 611, a second guide rail 612 which moves along the X axis and is arranged on the bending mounting plate 611, a forming cylinder mounting plate 613 which is slidably arranged on the second guide rail 612, and a third guide rail 614 which is arranged on the forming cylinder mounting plate 613 and moves along the Y axis, a forming bracket 615 is arranged on the third guide shaft 614, and a driving motor 616 and a push rod lead screw 617 which is drivingly connected with the driving motor are installed on the forming bracket 615; the structures of the first bending mechanism 61 and the second bending mechanism 62 are the same.

[0034] As Figure 9 , Figure 11As shown, the welding assembly 7 includes a welding mechanism 71 disposed on the first pressing block 46, and a pressing and welding fixture 72 disposed on the second pressing block 47 for pressing the steel strip to cooperate with the welding mechanism for welding. The welding mechanism 71 includes: a welding backing plate 711 disposed on the first pressing block 46, a two-axis translation module 712 disposed on the welding backing plate 711, an emission head support base 713 slidably disposed on the Y-axis of the two-axis translation module, and a laser emission head 714 mounted on the emission head support base 713 for emitting laser light.

[0035] As Figure 10 shown, the pressing and welding fixture 72 includes: a pressing cylinder 721 disposed on the second pressing block 47, a pressing head connecting plate 722 movably disposed at the movable end of the pressing cylinder 721, and a plurality of pressing heads 723 disposed on the pressing head connecting plate 722.

[0036] As Figure 12 , the pressing head 723 includes: a welding pressing rod 7231, a compression spring 7232, a spring shaft 7233 and a welding pressing block 7234. The welding pressing rod 7231 is fixedly disposed on the pressing head connecting plate 722. One end of the spring shaft 7233 is connected to the welding pressing rod 7231, and the other end of the spring shaft 7233 is connected to the welding pressing block 7234. The compression spring 7232 is sleeved on the spring shaft 7233 and is located between the welding pressing rod 7231 and the welding pressing block 7234.

[0037] Although the present invention has been disclosed through the above embodiments, the scope of the present invention is not limited thereto. Without departing from the concept of the present invention, the above components can be replaced by similar or equivalent elements known to those skilled in the art.

Claims

1. A battery strap welding machine, characterized in that, Including: A workbench (1), a forming plate (2) arranged on the workbench (1), a positioning assembly (3) arranged on the forming plate (2) for positioning the stack module and the steel strip, a pressing-down assembly (4) arranged on the workbench (1) and above the positioning assembly (3) for pressing the stack laminations, a forming assembly arranged in the workbench (1) and below the forming plate (2) for pressing and forming the steel strip, a steel strip bending assembly (6) arranged on the pressing-down assembly (4) for bending the steel strip in the radial direction, and a welding assembly (7) arranged on the pressing-down assembly (4) for welding the bent steel strip; A pair of support seats (41) arranged on the workbench (1), a pair of first upright posts (43) and a pair of second upright posts (44) which are arranged inside the pair of support seats (41) and are oppositely arranged. A first pressing block (46) and a second pressing block (47) are respectively arranged on the first upright post (43) and the pair of second upright posts (44). Two electric cylinder connecting blocks (49) are respectively arranged at the edges between the two ends of the first pressing block (46) and the second pressing block (47). The bending assembly (6) includes a first bending mechanism (61) arranged on the first pressing block (46) and a second bending mechanism (62) arranged on the second pressing block (47). The welding assembly (7) includes a welding mechanism (71) arranged on the first pressing block (46) and a pressing and welding fixture (72) arranged on the second pressing block (47) for pressing the steel strip to cooperate with the welding mechanism for welding.

2. The battery strap welding machine according to claim 1, wherein The positioning assembly (3) includes: a loading bottom plate (33), a left positioning mechanism (31) and a right positioning mechanism (32) arranged on the loading bottom plate (33). The left positioning mechanism (31) includes: a linear module (311), a positioning plate (312) arranged on the linear module (311), a plurality of optical rod mounting seats (313) respectively arranged on the positioning plate (312). An optical rod (314) is respectively installed in each optical rod mounting seat (313). The other ends of the optical rods (314) are respectively connected with a bearing plate (315). The bearing plate (315) is fixedly connected with a connecting plate (316). At least one first guide rail (317) is vertically arranged on the outer surface of the connecting plate (316). A slide table support plate (318) is slidably arranged on the first guide rail (317). A battery clamping cylinder (319) for clamping the battery is installed on one of the optical rods (314). A top plate (320) is arranged at the top of the slide table support plate (318). A battery lifting cylinder (321) is installed inside the top plate. The structures of the left positioning mechanism (31) and the right positioning mechanism (32) are the same.

3. The battery strap welding machine according to claim 2, characterized in that, Bottom support plates (322) are respectively arranged on both sides of the positioning plate (312) and on both sides of the plurality of optical rod mounting seats (313). Guide rods (323) are arranged on the bottom support plates (322).

4. The battery strap welding machine according to claim 2, wherein, A plurality of steel strip guide bars (324) for positioning the steel strip are also arranged on the loading bottom plate (33) at intervals.

5. The battery strap welding machine according to claim 1, wherein The pressing component (4) includes: drag chain plates (42) respectively arranged on both sides of each support seat (41), one ends of the first upright post (43) and the second upright post (44) are fixedly arranged on the workbench (1), the other ends of the first upright post (43) and the second upright post (44) are fixedly connected to the electric cylinder mounting seat (44), electric cylinder support connecting plates (45) are respectively fixedly arranged on both sides of the electric cylinder mounting seat (44), and a plurality of cell pressing blocks (48) for pressing the cell are further arranged at the bottoms of the first pressing block (46) and the second pressing block (47).

6. The battery strap welding machine according to claim 5, wherein, An fixing plate (410) is connected to the outside of the electric cylinder connecting block (49), and a down pressing electric cylinder (411) is mounted on the fixing plate (410).

7. The battery strap welding machine according to claim 5, characterized in that, The first bending mechanism (61) includes: a bending mounting plate (611), a second guide rail (612) arranged to move along the X-axis on the bending mounting plate (611), a forming cylinder mounting plate (613) slidably arranged on the second guide rail (612), and a third guide rail (614) arranged on the forming cylinder mounting plate (613) and moving along the Y-axis. A forming bracket (615) is arranged on the third guide rail (614), a driving motor (616) and a push rod lead screw (617) driven by the driving motor are mounted on the forming bracket (615), and a plurality of bending punches (618) are further arranged on the forming bracket (615); the structures of the first bending mechanism (61) and the second bending mechanism (62) are the same.

8. The battery strap welding machine according to claim 7, wherein, The welding mechanism (71) includes: a welding backing plate (711) arranged on the first pressing block (46), a two-axis translation module (712) arranged on the welding backing plate (711), an outgoing head support seat (713) slidably arranged on the Y-axis of the two-axis translation module, and a laser outgoing head (714) mounted on the outgoing head support seat (713) for emitting laser.

9. The battery strap welding machine according to claim 8, characterized in that, The pressing and welding fixture (72) includes: A pressing cylinder (721) arranged on the second pressing block (47), a pressing head connecting plate (722) movably arranged at the movable end of the pressing cylinder (721), and a plurality of pressing heads (723) arranged on the pressing head connecting plate (722).

10. The battery strap welding machine according to claim 9, characterized in that, The pressing head (723) includes: a welding pressing rod (7231), a compression spring (7232), a spring shaft (7233) and a welding pressing block (7234). The welding pressing rod (7231) is fixedly arranged on the pressing head connecting plate (722), one end of the spring shaft (7233) is connected to the welding pressing rod (7231), the other end of the spring shaft (7233) is connected to the welding pressing block (7234), and the compression spring (7232) is sleeved on the spring shaft (7233) and located between the welding pressing rod (7231) and the welding pressing block (7234).

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