Copper bar laser welding device for energy storage cabinet and welding process of copper bar laser welding device

Abstract

The invention is suitable for the technical field of copper bar laser welding, and provides a copper bar laser welding device for an energy storage cabinet and a welding process of the copper bar laser welding device. The shaping unit comprises a supporting frame, a driving motor, a worm, a worm gear, a supporting plate, a shaping plate and an auxiliary part. The straightening unit comprises a vertical plate, a fixed motor, a fixed roller, a fixed gear, a tooth column, an adjusting part and an adjusting gear; the shaping unit is used for shaping the n-shaped bending part of the copper bar, so that the two supporting plates and the shaping plate extrude and shape the side walls of the two sides of the convex part at the n-shaped bending part of the copper bar; therefore, the size precision and the overall structure stability of the copper bar are guaranteed, and the welding quality of the copper bar and the battery pole is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of copper busbar laser welding, and more particularly to a copper busbar laser welding device for an energy storage cabinet and a welding process thereof. Background Art

[0002] Laser welding of copper busbars and battery terminals in energy storage cabinets is a high-precision, high-efficiency metal joining process, primarily used in the manufacture of power batteries (such as lithium batteries). Laser energy is used to reliably weld the conductive copper busbars to the battery terminals (usually made of aluminum or copper).

[0003] In the existing technology, commonly used copper busbars are mostly rectangular and have a flat surface, and can be reliably welded by welding. However, in order to meet production needs, in some energy storage cabinet devices, the copper busbar needs to be set into a "J" shape to facilitate changing the current path.

[0004] However, when welding the "J"-shaped copper busbar, the order of welding the copper busbar needs to be considered. After welding one end, the other end is welded. At this time, when welding the first end, the local high temperature (600~1000℃) causes the copper busbar to expand, and the "J"-shaped bend is deformed due to insufficient rigidity. When welding the second end, the thermal stress on both sides is unbalanced, causing the bending angle to change again. This repeated deformation and angle change will eventually seriously affect the dimensional accuracy and overall structural stability of the copper busbar, thereby reducing the welding quality and may even make it unable to meet subsequent installation and use requirements, posing potential risks to the performance and safety of the entire electrical equipment.

[0005] At the same time, after welding the first end of the "J"-shaped copper busbar, the end will be fixed in the welding position; due to the characteristics of the copper busbar material, during the welding process, the "J"-shaped bend will rebound due to the release of thermal stress; this rebound force will be transmitted through the rigidity of the copper busbar itself, forming a tensile force acting on the first end that has been welded; because the direction of this tensile force is perpendicular to the welding surface, it will generate a vertical peeling force on the welded end; this peeling force will cause great stress concentration on the weld, making the weld of the welded end prone to cracking after being stressed; it will not only affect the welding quality of the copper busbar, but also have an extremely adverse effect on the performance, safety and reliability of the entire electrical equipment, and must be given high attention and avoided during welding process design and operation.

[0006] To this end, a copper busbar laser welding device for an energy storage cabinet and a welding process thereof are proposed to improve the existing problems. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention aims to provide a copper busbar laser welding device for an energy storage cabinet and a welding process thereof.

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a laser welding device for copper bars of energy storage cabinets, comprising a welding unit, a shaping unit is arranged above the welding unit, and straightening units are evenly arranged around the shaping unit; the shaping unit comprises a support frame, a driving motor arranged in the support frame, a worm arranged at the output end of the driving motor, a worm wheel evenly arranged around the worm, a support plate arranged on one side of the worm wheel, a shaping plate arranged at one end of the support plate, and auxiliary parts symmetrically arranged on both sides of the support frame in the axial direction; the straightening unit comprises a vertical plate, a fixed motor arranged on one side of the vertical plate, a fixed roller sleeved on the output end of the fixed motor, a fixed gear arranged at the end of the fixed roller away from the fixed motor, a gear column meshing with the fixed gear for transmission, an adjusting member arranged at one end of the vertical plate, and an adjusting gear arranged at one end of the adjusting member; the adjusting gear can mesh with the gear column for transmission.

[0009] The present invention is further configured as follows: the welding unit includes a welding machine, a Y-axis electric linear guide symmetrically arranged on the top of the welding machine in the radial direction, an X-axis electric linear guide arranged between the Y-axis electric linear guides, a vertical electric linear guide arranged on one side of the X-axis electric linear guide, a laser welding gun arranged at the displacement end of the vertical electric linear guide, and a pressing plate arranged below the laser welding gun; the pressing plate is L-shaped, and a positioning hole is opened at the bottom horizontally of the pressing plate.

[0010] The present invention is further configured as follows: a track is provided between the Y-axis electric linear guide rails, an electric slide is slidably provided on the track, a main board is provided below the electric slide, and an offset piece is provided at the bottom of the main board.

[0011] The present invention is further configured as follows: the offset member includes a first motor, a first rotating shaft rotatably connected to the output end of the first motor, a offset plate rotatably connected to an end of the first rotating shaft away from the first motor, a second motor arranged on one side of the first motor, a second rotating shaft rotatably connected to the output end of the second motor, and a third rotating shaft arranged on one side of the second rotating shaft; the first motor and the first rotating shaft are vertically distributed, the second motor and the second rotating shaft are vertically distributed, the end of the second rotating shaft away from the second motor is rotatably connected to the top of the offset plate, one end of the third rotating shaft is rotatably connected to the top of the offset plate, and the other end is rotatably connected to the bottom of the main board.

[0012] The present invention is further configured as follows: the output end of the driving motor passes through the bottom of the support frame and is connected to the worm, the worm can engage with the worm wheel for transmission, and the two sides of the worm wheel are rotatably connected to the side walls corresponding to the bottom of the support frame; one end of the support plate is U-shaped, and the other end is vertically bent, the worm wheel is located in the U-shaped end of the corresponding support plate, and the two sides of the worm wheel can pass through the corresponding inner wall of the U-shaped end of the support plate and be rotatably connected to the side walls corresponding to the bottom of the support frame, and the worm wheel and the support plate are relatively stationary.

[0013] The present invention is further configured as follows: the auxiliary component includes a telescopic cylinder and an auxiliary plate arranged at the telescopic end of the telescopic cylinder; the telescopic end of the telescopic cylinder passes through the side wall of the corresponding support plate and is connected to the auxiliary plate.

[0014] The present invention is further configured as follows: a slide rail is symmetrically provided in the radial direction of the bottom of the main board, an electric slider is slidably provided on the slide rail, a connecting frame is provided between the electric sliders, a pneumatic clamp is provided at the bottom of the connecting frame, a splint is provided at both ends of the pneumatic clamp, a lifting cylinder is provided on the side wall of the splint, and the telescopic end of the lifting cylinder is connected to the side wall of the corresponding vertical plate.

[0015] The present invention is further configured as follows: a notch is opened on one side of the vertical plate, the output end of the fixed motor passes through the side wall of the vertical plate and is connected to the fixed roller, a rotating shaft is also provided on the side of the fixed gear away from the fixed roller, both ends of the rotating shaft are rotatably connected to the side wall of the vertical plate, and the gear column is sleeved on the rotating shaft.

[0016] The present invention is further configured as follows: the adjusting member includes an adjusting motor, an adjusting shaft arranged at the output end of the adjusting motor, an adjusting frame arranged on the adjusting shaft, and an adjusting roller rotatably connected to the adjusting frame; the output end of the adjusting motor passes through the side wall of the vertical plate and is connected to the adjusting shaft, one end of the adjusting roller passes through the side wall of the adjusting frame and is connected to the adjusting gear, and a displacement groove is also provided on the side wall of the vertical plate, and the side wall of the adjusting frame can slide in the displacement groove.

[0017] A copper busbar laser welding process for an energy storage cabinet, using the copper busbar laser welding device for an energy storage cabinet as described above, comprises the following steps: S1. First, place the copper busbar between the corresponding batteries so that one end of the copper busbar is located on the positive electrode of one battery and the other end of the copper busbar is located on the negative electrode of the other battery. Then start the welding unit to perform circular laser welding on the two ends of the copper busbar in sequence. S2. During the working process of S1, the driving motor is started, driving the worm to rotate, so that the four worm wheels rotate simultaneously, thereby driving the corresponding support plates to rotate synchronously, and then driving the corresponding shaping plates to simultaneously fit the four sides of the "J"-shaped bend of the copper busbar tightly; thereby, two of the support plates and the shaping plates squeeze and shape the side walls of the raised part of the "J"-shaped bend of the copper busbar, and the other two support plates and the shaping plates limit and fix the other two side walls of the "J"-shaped bend of the copper busbar; S3. Insert the copper bar at the position that is not tilted upward between the fixed roller and the adjusting member, so that the outer wall of the fixed roller fits the bottom of the copper bar. Since the copper bar is tilted upward, the bottom of the copper bar is in its original horizontal position. S4. Then the fixed motor starts, driving the fixed roller to rotate, and drives the adjusting member to rotate simultaneously through the fixed gear, the gear column and the adjusting gear, so that the fixed roller and the adjusting member roll and straighten the bottom and top of the copper busbar at the same time; S5. During the working process of S4, the adjusting part will also be started, so that during the rolling and straightening process, the adjusting part will gradually slide close to the fixed roller and squeeze the copper bar against the fixed roller, so that the copper bar will gradually be straightened to the original level.

[0018] In summary, this application includes at least one of the following beneficial technical effects: (1) The function of the shaping unit is to shape the "J"-shaped bend of the copper busbar, so that the two support plates and the shaping plate squeeze and shape the side walls of the raised part of the "J"-shaped bend of the copper busbar; this avoids the problem that when welding the first end, the local high temperature causes the copper busbar to expand, and the "J"-shaped bend is deformed due to insufficient rigidity; when welding the second end, the thermal stress on both sides is unbalanced, causing the bending angle to change again; thereby ensuring the dimensional accuracy and overall structural stability of the copper busbar, and thus improving the welding quality of the copper busbar and the battery pole.

[0019] (2) The function of the straightening unit is to straighten and repair the copper busbar with the welded end raised, so that the fixed roller and the adjusting part can roll and straighten the bottom and top of the copper busbar at the same time; it avoids the rebound phenomenon caused by the release of thermal stress at the "J"-shaped bend; this rebound force will be transmitted through the rigidity of the copper busbar itself, forming a tensile force acting on the first end that has been welded; because the direction of this tensile force is perpendicular to the welding surface, it will generate a vertical peeling force on the welded end; this peeling force will cause great stress concentration on the weld, making the weld of the welded end prone to cracking after being stressed; further improving the welding quality of the copper busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the overall structure of the copper busbar laser welding device for energy storage cabinets according to the present invention.

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0022] Figure 3 This is a schematic diagram of the overall structure of the track, electric slide and main board in the present invention.

[0023] Figure 4 Schematic diagram of the overall structure of the offset member in the present invention.

[0024] Figure 5 This is a schematic diagram of the coordination structure between the shaping unit and the copper busbar in the present invention.

[0025] Figure 6 Schematic diagram of the annular laser welding structure of the copper busbar in the present invention.

[0026] Figure 7 This is a schematic diagram of the overall structure of the main board and pneumatic clamping jaws in the present invention.

[0027] Figure 8 It is a schematic diagram of the overall structure of the straightening unit in the present invention.

[0028] Figure 9 It is a schematic diagram of the overall structure of the neutral plate and the cutout of the present invention.

[0029] Explanation of reference numerals: 1. welding unit; 11. welding machine; 12. Y-axis electric linear guide; 13. X-axis electric linear guide; 14. Vertical electric linear guide; 15. laser welding gun; 16. pressing plate; 161. positioning hole; 17. track; 171. electric slide; 18. main board; 181. slide rail; 182. electric slide; 183. connecting frame; 184. pneumatic clamp; 185. clamping plate; 186. lifting cylinder; 19. offset member; 191. first motor; 192. first rotating shaft; 193. offset plate; 194. second motor; 195. second rotating shaft; 196. third rotating shaft; 2. Shaping unit; 21. Support frame; 22. Drive motor; 23. Worm; 24. Worm gear; 25. Support plate; 26. Shaping plate; 27. Auxiliary parts; 271. Telescopic cylinder; 272. Auxiliary plate; 3. Straightening unit; 31. Vertical plate; 311. Incision; 312. Displacement slot; 32. Fixed motor; 33. Fixed roller; 34. Fixed gear; 35. Gear column; 36. Adjusting member; 361. Adjusting motor; 362. Adjusting shaft; 363. Adjusting frame; 364. Adjusting roller; 37. Adjusting gear; 38. Rotating shaft. DETAILED DESCRIPTION

[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0031] See also Figures 1-9 , the present invention provides the following technical solutions: Example 1, see Figures 1-9 A laser welding device for copper busbars of energy storage cabinets includes a welding unit 1, a shaping unit 2 is arranged above the welding unit 1, and straightening units 3 are evenly arranged around the shaping unit 2.

[0032] Among them, the function of the shaping unit 2 is to shape the "J"-shaped bend of the copper busbar, so that the two support plates 25 and the shaping plate 26 squeeze and shape the side walls of the raised part of the "J"-shaped bend of the copper busbar; when welding the first end, the local high temperature (600~1000℃) causes the copper busbar to expand and the "J"-shaped bend is deformed due to insufficient rigidity; when welding the second end, the thermal stress on both sides is unbalanced, causing the bending angle to change again; thereby ensuring the dimensional accuracy and overall structural stability of the copper busbar, and further improving the welding quality of the copper busbar and the battery pole.

[0033] The function of the straightening unit 3 is to straighten and repair the copper busbar with the raised welded end, so that the fixed roller 33 and the adjusting member 36 roll and straighten the bottom and top of the copper busbar at the same time; this avoids the rebound phenomenon at the "J"-shaped bend due to the release of thermal stress; this rebound force will be transmitted through the rigidity of the copper busbar itself, forming a tensile force acting on the first end that has been welded; because the direction of this tensile force is perpendicular to the welding surface, it will generate a vertical peeling force on the welded end; this peeling force will cause great stress concentration on the weld, making the weld of the welded end prone to cracking after being stressed; further improving the welding quality of the copper busbar.

[0034] See Figure 1-Figure 2 Specifically, the welding unit 1 includes a welding machine 11, a Y-axis electric linear guide 12 symmetrically arranged on the top of the welding machine 11 in the radial N direction, an X-axis electric linear guide 13 arranged between the Y-axis electric linear guide 12, a vertical electric linear guide 14 arranged on one side of the X-axis electric linear guide 13, a laser welding gun 15 arranged at the displacement end of the vertical electric linear guide 14, and a pressing plate 16 arranged below the laser welding gun 15; the pressing plate 16 is L-shaped, and a positioning hole 161 is opened at the bottom of the pressing plate 16 in the horizontal direction.

[0035] Among them, by starting the Y-axis electric linear guide 12, the X-axis electric linear guide 13 and the vertical electric linear guide 14, the laser welding gun 15 can be driven to weld the copper busbar at any position; during welding, the vertical electric linear guide 14 drives the pressing plate 16 to move downward, so that the pressing plate 16 presses one end of the copper busbar to be welded, and the part to be welded is exposed in the positioning hole 161, and finally the laser welding gun 15 can be used to perform circular laser welding.

[0036] See Figure 3-Figure 6 Specifically, the shaping unit 2 includes a support frame 21, a driving motor 22 arranged in the support frame 21, a worm 23 arranged at the output end of the driving motor 22, a worm wheel 24 evenly arranged around the worm 23, a support plate 25 arranged on one side of the worm wheel 24, a shaping plate 26 arranged at one end of the support plate 25, and auxiliary parts 27 symmetrically arranged on both sides of the support frame 21 in the axial M direction.

[0037] Among them, the copper busbar is first placed between the corresponding batteries, so that one end of the copper busbar is located on the positive pole of one battery and the other end of the copper busbar is located on the negative pole of the other battery. Then the welding unit 1 is started, so that the welding unit 1 performs circular laser welding on the two ends of the copper busbar in turn.

[0038] During the operation of the welding unit 1, the driving motor 22 is started, driving the worm 23 to rotate, so that the four worm gears 24 rotate at the same time. Since the two sides of the worm gear can penetrate the corresponding inner wall of the U-shaped end of the support plate and are rotatably connected to the corresponding side wall of the bottom of the support frame, the worm gear and the support plate are relatively stationary, thereby driving the corresponding support plate 25 to rotate synchronously. Since one end of the support plate 25 is U-shaped and the other end is vertically bent, and the vertically bent end is connected to the shaping plate 26, the shaping plate 26 and the support plate 25 are also vertically distributed. Figure 5 and Figure 6 It can be seen that the support plate 25 will drive the corresponding shaping plate 26 to simultaneously fit the four sides of the "J"-shaped bend of the copper busbar tightly; thereby, two of the support plates 25 and the shaping plate 26 squeeze and shape the side walls of the raised portion of the "J"-shaped bend of the copper busbar, thereby avoiding the problem that when welding the first end, the local high temperature (600-1000°C) causes the copper busbar to expand and the "J"-shaped bend to deform due to insufficient rigidity; when welding the second end, the thermal stress on both sides is unbalanced, causing the bending angle to change again; thereby ensuring the dimensional accuracy and overall structural stability of the copper busbar, and thereby improving the welding quality of the copper busbar and the battery pole.

[0039] At the same time, since the lateral tension generated by the elastic rebound of the copper bar manifests as a multi-dimensional complex stress release, there is not only vertical peeling force, but also torsional stress. Therefore, the other two support plates 25 and the shaping plate 26 can also limit and fix the other two side walls of the "J"-shaped bend of the copper bar, making it less likely for the copper bar to torsion, thereby ensuring the welding quality of the copper bar and being beneficial to the overall structural stability of the copper bar.

[0040] See Figure 7-Figure 9 Specifically, the straightening unit 3 includes a vertical plate 31, a fixed motor 32 arranged on one side of the vertical plate 31, a fixed roller 33 mounted on the output end of the fixed motor 32, a fixed gear 34 arranged at the end of the fixed roller 33 away from the fixed motor 32, a gear column 35 meshing with the fixed gear 34 for transmission, an adjusting member 36 arranged at one end of the vertical plate 31, and an adjusting gear 37 arranged at one end of the adjusting member 36; the adjusting gear 37 can be meshed with the gear column 35 for transmission.

[0041] After welding the first end of the "J"-shaped copper busbar, it will be fixed in the welding position. Due to the characteristics of the copper busbar material, the bend will rebound due to the release of thermal stress during the welding process. This rebound force will be transmitted through the rigidity of the copper busbar itself, forming a tensile force acting on the first end that has been welded. Because the direction of this tensile force is perpendicular to the welding surface, it will generate a vertical peeling force on the first end of the copper busbar, that is, the welded end. This peeling force will cause great stress concentration on the weld, making the weld at the welded end prone to cracking after being subjected to stress.

[0042] It should be noted that in the present invention, after the peeling force is generated at the welded end, the copper busbar at the welded end will be deformed to warp upward. At this time, there is a transition section between the upwardly warped copper busbar and the welded end. The copper busbar in this transition section is in a horizontal distribution, that is, it does not warp upward.

[0043] Therefore, it is necessary to first insert the portion of the copper busbar where the soldered end is not tilted upward (transition section) into the space between the fixed roller 33 and the adjusting member 36, so that the outer wall of the fixed roller 33 is in contact with the bottom of the copper busbar. Since the deformed portion of the copper busbar is tilted upward, the tangent side wall of the fixed roller 33 and the copper busbar in contact is in the original horizontal position.

[0044] Then the fixed motor 32 is started, driving the fixed roller 33 to rotate, and driving the adjusting member 36 to rotate at the same time through the fixed gear 34, the tooth column 35 and the adjusting gear 37, so that the fixed roller 33 and the adjusting member 36 roll and straighten the bottom and the top of the copper busbar at the same time; in this process, the adjusting member 36 is also started, so that the adjusting member 36 gradually slides close to the fixed roller 33 during the rolling and straightening process, and squeezes the copper busbar against the fixed roller 33, so that the copper busbar is gradually straightened to its original level; avoiding the rebound phenomenon at the "J"-shaped bend due to the release of thermal stress, and further improving the welding quality of the copper busbar.

[0045] See Figure 3-Figure 7 Furthermore, a track 17 is provided between the Y-axis electric linear guide rails 12, an electric slide 171 is slidably provided on the track 17, a main board 18 is provided below the electric slide 171, and an offset member 19 is provided at the bottom of the main board 18.

[0046] Among them, when the electric slide 171 is started, it can drive the main board 18 and the offset member 19 to slide on the track 17. At the same time, the shaping unit 2 connected to the offset member 19 also moves synchronously, thereby driving the shaping unit 2 to shape different copper bars.

[0047] See Figure 3-Figure 7 Furthermore, the offset member 19 includes a first motor 191, a first rotating shaft 192 rotatably connected to the output end of the first motor 191, a offset plate 193 rotatably connected to the end of the first rotating shaft 192 away from the first motor 191, a second motor 194 arranged on one side of the first motor 191, a second rotating shaft 195 rotatably connected to the output end of the second motor 194, and a third rotating shaft 196 arranged on one side of the second rotating shaft 195; the first motor 191 and the first rotating shaft 192 are vertically distributed, the second motor 194 and the second rotating shaft 195 are vertically distributed, the end of the second rotating shaft 195 away from the second motor 194 is rotatably connected to the top of the offset plate 193, one end of the third rotating shaft 196 is rotatably connected to the top of the offset plate 193, and the other end is rotatably connected to the bottom of the main board 18.

[0048] Among them, the first motor 191 is started, driving the first rotating shaft 192 to rotate, so that the first rotating shaft 192 rotates around the end of the first rotating shaft 192 close to the first motor 191; the second motor 194 is started, driving the second rotating shaft 195 to rotate around the end of the second rotating shaft 195 close to the second motor 194; when it is necessary to move the offset plate 193 in one direction, the first motor 191 can drive the first rotating shaft 192 to rotate in the corresponding direction, and the second motor 194 stops at this time. Since the connection between the second motor 194 and the second rotating shaft 195 is hinged, the second rotating shaft 195 can rotate with the first rotating shaft 192 offset; and when the second motor 194 is started, the second motor 194 can drive the second shaft 195 to rotate in another corresponding direction. At this time, the first motor 191 stops. Since the connection between the first motor 191 and the first shaft 192 is a hinge, the first shaft 192 can rotate and offset with the second shaft 195; in this process, the third shaft 196 will also tilt and offset with the rotation of the first shaft 192 and the second shaft 195, so that the first shaft 192, the second shaft 195 and the third shaft 196 can rotate and offset in any direction at the same time, so that the offset plate 193 is displaced synchronously.

[0049] Therefore, after the shaping unit 2 tightly fits the four sides of the "J"-shaped bend of the copper busbar, due to the characteristics of the copper busbar material, the bend will rebound due to the release of thermal stress during the welding process; this rebound force will be transmitted through the rigidity of the copper busbar itself, forming a tensile force acting on the first end that has been welded; since the direction of this tensile force is perpendicular to the welding surface, it will generate a vertical peeling force on the first end of the copper busbar, that is, the welded end. After the peeling force is generated at the welded end, the copper busbar at the welded end will be deformed to tilt upward. At this time, the first rotating shaft 192, the second rotating shaft 195 and the third rotating shaft 196 can be rotated and offset in any direction at the same time, so that the offset plate 193 is displaced synchronously, and then the shaping unit 2 can continue to tightly fit the four sides of the "J"-shaped bend of the copper busbar after the copper busbar is deformed to tilt upward.

[0050] See Figure 3-Figure 7 Furthermore, the output end of the drive motor 22 passes through the bottom of the support frame 21 and is connected to the worm 23. The worm 23 can engage with the worm gear 24 for transmission, and the two sides of the worm gear 24 are rotatably connected to the corresponding side walls of the bottom of the support frame 21; one end of the support plate 25 is U-shaped, and the other end is vertically bent. The worm gear 24 is located in the U-shaped end of the corresponding support plate 25, and the two sides of the worm gear 24 can pass through the corresponding inner wall of the U-shaped end of the support plate 25 and be rotatably connected to the corresponding side walls of the bottom of the support frame 21. The worm gear 24 and the support plate 25 are relatively stationary.

[0051] See Figure 3-Figure 7 Furthermore, the auxiliary component 27 includes a telescopic cylinder 271 and an auxiliary plate 272 arranged at the telescopic end of the telescopic cylinder 271; the telescopic end of the telescopic cylinder 271 passes through the side wall of the corresponding support plate 25 and is connected to the auxiliary plate 272.

[0052] Among them, when two of the support plates 25 and the shaping plate 26 extrude and shape the side walls on both sides of the raised part of the "J"-shaped bend of the copper busbar, since one end of the support plate 25 is U-shaped and the other end is vertically bent, the vertical bend at the other end of the support plate 25 can be clamped on the top of the "J"-shaped bend, and the shaping plate 26 tightly fits the corresponding side wall; in this process, the telescopic cylinder 271 is started, driving the auxiliary plate 272 to press down, and the top of the "J"-shaped bend is squeezed and flattened again, thereby avoiding the local high temperature (600~1000℃) when welding the first end, causing the copper busbar to expand and the "J"-shaped bend to deform due to insufficient rigidity; when welding the second end, the thermal stress on both sides is unbalanced, resulting in the bending angle changing again; thereby ensuring the dimensional accuracy and overall structural stability of the copper busbar, thereby improving the welding quality of the copper busbar and the battery pole.

[0053] Embodiment 2: The technical solution of embodiment 1 solves the problem in the prior art that when welding the first end, the local high temperature (600-1000°C) causes the copper busbar to expand, and the "J" bend is deformed due to insufficient rigidity; when welding the second end, the thermal stress on both sides is unbalanced, causing the bending angle to change again; however, it does not solve the problem that the "J" bend will rebound due to the release of thermal stress; this rebound force will be transmitted through the rigidity of the copper busbar itself, forming a tensile force acting on the already welded first end; because the direction of this tensile force is perpendicular to the welding surface, it will generate a vertical peeling force on the welded end; this peeling force will cause a great stress concentration on the weld, making the weld of the welded end prone to cracking after being stressed; therefore, the following solution is proposed: See Figure 7-Figure 9 Furthermore, a slide rail 181 is symmetrically provided in the radial N direction at the bottom of the main board 18, an electric slider 182 is slidably provided on the slide rail 181, a connecting frame 183 is provided between the electric sliders 182, a pneumatic clamp 184 is provided at the bottom of the connecting frame 183, and a splint 185 is provided at both ends of the pneumatic clamp 184. A lifting cylinder 186 is provided on the side wall of the splint 185, and the telescopic end of the lifting cylinder 186 is connected to the side wall of the corresponding vertical plate 31.

[0054] Among them, the pneumatic clamp 184 is started, driving the clamps 185 at both ends to retract, so that the two sides of the copper busbar are respectively clamped into the corresponding straightening units 3. Then, when the straightening unit 3 is started, the electric slider 182 is started, and the straightening unit 3 is driven to slide through the connecting frame 183, so that the straightening unit 3 is repaired and straightened along the warping direction of the copper busbar.

[0055] By starting the lifting cylinder 186, the straightening unit 3 can be driven to move up and down, and there will be no interference after the electric slide 171 starts to slide.

[0056] See Figure 7-Figure 9 Furthermore, a cutout 311 is provided on one side of the vertical plate 31, and the output end of the fixed motor 32 passes through the side wall of the vertical plate 31 and is connected to the fixed roller 33. A rotating shaft 38 is also provided on the side of the fixed gear 34 away from the fixed roller 33. Both ends of the rotating shaft 38 are rotatably connected to the side wall of the vertical plate 31, and the gear column 35 is sleeved on the rotating shaft 38.

[0057] See Figure 7-Figure 9 Furthermore, the adjusting member 36 includes an adjusting motor 361, an adjusting shaft 362 arranged at the output end of the adjusting motor 361, an adjusting frame 363 arranged on the adjusting shaft 362, and an adjusting roller 364 rotatably connected to the adjusting frame 363; the output end of the adjusting motor 361 passes through the side wall of the vertical plate 31 and is connected to the adjusting shaft 362, one end of the adjusting roller 364 passes through the side wall of the adjusting frame 363 and is connected to the adjusting gear 37, and a displacement groove 312 is also opened on the side wall of the vertical plate 31, and the side wall of the adjusting frame 363 can slide in the displacement groove 312.

[0058] Among them, the side of the transition section of the welded end of the copper busbar enters the vertical plate 31 through the incision 311; then the fixed motor 32 is started, driving the fixed roller 33 to rotate, and driving the adjusting roller 364 to rotate simultaneously through the fixed gear 34, the tooth column 35, the adjusting gear 37 and the rotating shaft 38, so that the fixed roller 33 and the adjusting roller 364 roll and straighten the bottom and top of the copper busbar at the same time; in this process, the adjusting motor 361 is started, driving the adjusting shaft 362 to rotate, so that the adjusting frame 363 slides linearly in the displacement groove 312, driving the adjusting roller 364 to gradually slide close to the fixed roller 33 during the rolling and straightening process, and squeeze the copper busbar against the fixed roller 33, so that the copper busbar is gradually straightened to its original level; avoiding the rebound phenomenon at the "J"-shaped bend due to the release of thermal stress; further improving the welding quality of the copper busbar.

[0059] It should be noted that if the two ends of the copper busbar are simultaneously laser-circularly welded, due to the particularity of the "J"-shaped bend in the middle of the copper busbar, the "J"-shaped bend of the copper busbar will still be deformed, and at this time it still needs to be reshaped by the shaping unit 2 in the present invention; at the same time, during the welding process, the vertical peeling force generated on the welded end is also the same. If the two ends are welded at the same time, the two ends will also generate peeling force at the same time, and they also need to be repaired and straightened by the straightening unit 3.

[0060] Example 3, a laser welding process for copper busbars used in energy storage cabinets, using the above-mentioned laser welding device for copper busbars used in energy storage cabinets, includes the following steps: S1. First, place the copper busbar between the corresponding batteries so that one end of the copper busbar is located on the positive pole of one battery and the other end of the copper busbar is located on the negative pole of the other battery. Then start the welding unit 1 so that the welding unit 1 performs circular laser welding on the two ends of the copper busbar in sequence.

[0061] S2. During the working process of S1, the driving motor 22 is started, driving the worm 23 to rotate, so that the four worm wheels 24 rotate at the same time, thereby driving the corresponding support plates 25 to rotate synchronously, and then driving the corresponding shaping plates 26 to simultaneously fit the four sides of the "J"-shaped bend of the copper busbar tightly; thereby, two of the support plates 25 and the shaping plates 26 squeeze and shape the side walls on both sides of the raised part of the "J"-shaped bend of the copper busbar, and the other two support plates 25 and the shaping plates 26 limit and fix the other two side walls of the "J"-shaped bend of the copper busbar.

[0062] S3. Insert the copper bar at the position that is not tilted upward between the fixed roller 33 and the adjusting member 36 so that the outer wall of the fixed roller 33 fits the bottom of the copper bar. Since the copper bar tilts upward, the bottom of the copper bar is in its original horizontal position.

[0063] S4. Then the fixed motor 32 is started, driving the fixed roller 33 to rotate, and driving the adjusting member 36 to rotate simultaneously through the fixed gear 34, the gear column 35 and the adjusting gear 37, so that the fixed roller 33 and the adjusting member 36 roll and straighten the bottom and top of the copper busbar at the same time.

[0064] S5. During the working process of S4, the adjusting member 36 will also be started, so that the adjusting member 36 gradually slides close to the fixed roller 33 during the rolling straightening process, and squeezes the copper bar against the fixed roller 33, so that the copper bar is gradually straightened to the original horizontality.

[0065] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

Claims

1. A copper busbar laser welding device for energy storage cabinets, characterized by: include, A welding unit (1), wherein a shaping unit (2) is provided above the welding unit (1), and straightening units (3) are evenly provided around the shaping unit (2); The shaping unit (2) includes a support frame (21), a driving motor (22) arranged in the support frame (21), a worm (23) arranged at the output end of the driving motor (22), a worm wheel (24) evenly arranged around the worm (23), a support plate (25) arranged on one side of the worm wheel (24), a shaping plate (26) arranged at one end of the support plate (25), and auxiliary parts (27) symmetrically arranged on both sides of the support frame (21) in the axial direction; The straightening unit (3) comprises a vertical plate (31), a fixed motor (32) arranged on one side of the vertical plate (31), a fixed roller (33) sleeved on the output end of the fixed motor (32), a fixed gear (34) arranged at the end of the fixed roller (33) away from the fixed motor (32), a tooth column (35) meshing with the fixed gear (34) for transmission, an adjusting member (36) arranged at one end of the vertical plate (31), and an adjusting gear (37) arranged at one end of the adjusting member (36); the adjusting gear (37) is capable of meshing with the tooth column (35) for transmission.

2. The copper busbar laser welding device for an energy storage cabinet according to claim 1, characterized in that: The welding unit (1) comprises a welding machine (11), a Y-axis electric linear guide (12) symmetrically arranged on the top of the welding machine (11) in a radial direction, an X-axis electric linear guide (13) arranged between the Y-axis electric linear guide (12), a vertical electric linear guide (14) arranged on one side of the X-axis electric linear guide (13), a laser welding gun (15) arranged at the displacement end of the vertical electric linear guide (14), and a pressing plate (16) arranged below the laser welding gun (15); The pressing plate (16) is L-shaped, and a positioning hole (161) is provided at the bottom of the pressing plate (16) in the horizontal direction.

3. The copper busbar laser welding device for an energy storage cabinet according to claim 2, characterized in that: A track (17) is further provided between the Y-axis electric linear guide rails (12), an electric slide (171) is slidably provided on the track (17), a main board (18) is provided below the electric slide (171), and an offset member (19) is provided at the bottom of the main board (18).

4. The copper busbar laser welding device for an energy storage cabinet according to claim 3, characterized in that: The offset member (19) includes a first motor (191), a first rotating shaft (192) rotatably connected to an output end of the first motor (191), a offset plate (193) rotatably connected to an end of the first rotating shaft (192) away from the first motor (191), a second motor (194) arranged on one side of the first motor (191), a second rotating shaft (195) rotatably connected to an output end of the second motor (194), and a third rotating shaft (196) arranged on one side of the second rotating shaft (195); The first motor (191) and the first rotating shaft (192) are vertically distributed, the second motor (194) and the second rotating shaft (195) are vertically distributed, one end of the second rotating shaft (195) away from the second motor (194) is rotatably connected to the top of the offset plate (193), and one end of the third rotating shaft (196) is rotatably connected to the top of the offset plate (193), and the other end is rotatably connected to the bottom of the main board (18).

5. The copper busbar laser welding device for an energy storage cabinet according to claim 1, characterized in that: The output end of the driving motor (22) passes through the bottom of the support frame (21) and is connected to the worm (23), and the worm (23) can be meshed with the worm wheel (24) for transmission, and the two sides of the worm wheel (24) are rotatably connected to the side walls corresponding to the bottom of the support frame (21); One end of the support plate (25) is U-shaped, and the other end is vertically bent. The worm gear (24) is located in the U-shaped end of the corresponding support plate (25). Both sides of the worm gear (24) can penetrate the corresponding inner wall of the U-shaped end of the support plate (25) and be rotatably connected to the corresponding side wall of the bottom of the support frame (21). The worm gear (24) and the support plate (25) are relatively stationary.

6. The copper busbar laser welding device for an energy storage cabinet according to claim 5, characterized in that: The auxiliary component (27) comprises a telescopic cylinder (271) and an auxiliary plate (272) arranged at the telescopic end of the telescopic cylinder (271); the telescopic end of the telescopic cylinder (271) passes through the side wall of the corresponding support plate (25) and is connected to the auxiliary plate (272).

7. The copper busbar laser welding device for an energy storage cabinet according to claim 3, characterized in that: The main board (18) is symmetrically provided with a slide rail (181) in a radial direction at the bottom thereof, an electric slider (182) is slidably provided on the slide rail (181), a connecting frame (183) is provided between the electric sliders (182), a pneumatic clamp (184) is provided at the bottom of the connecting frame (183), a clamping plate (185) is provided at both ends of the pneumatic clamp (184), a lifting cylinder (186) is provided on the side wall of the clamping plate (185), and the telescopic end of the lifting cylinder (186) is connected to the side wall of the corresponding vertical plate (31).

8. The copper busbar laser welding device for an energy storage cabinet according to claim 1, characterized in that: A notch (311) is provided on one side of the vertical plate (31), and an output end of the fixed motor (32) passes through the side wall of the vertical plate (31) and is connected to the fixed roller (33). A rotating shaft (38) is further provided on the side of the fixed gear (34) away from the fixed roller (33). Both ends of the rotating shaft (38) are rotatably connected to the side wall of the vertical plate (31), and the gear column (35) is sleeved on the rotating shaft (38).

9. The copper busbar laser welding device for an energy storage cabinet according to claim 8, characterized in that: The adjusting member (36) includes an adjusting motor (361), an adjusting shaft (362) disposed at the output end of the adjusting motor (361), an adjusting frame (363) disposed on the adjusting shaft (362), and an adjusting roller (364) rotatably connected to the adjusting frame (363); The output end of the regulating motor (361) passes through the side wall of the vertical plate (31) and is connected to the regulating shaft (362). One end of the regulating roller (364) passes through the side wall of the regulating frame (363) and is connected to the regulating gear (37). A displacement groove (312) is also provided on the side wall of the vertical plate (31), and the side wall of the regulating frame (363) can slide in the displacement groove (312).

10. A copper busbar laser welding process for an energy storage cabinet, using the copper busbar laser welding device for an energy storage cabinet according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, first placing the copper busbar between the corresponding batteries so that one end of the copper busbar is located on the positive electrode of one battery and the other end of the copper busbar is located on the negative electrode of the other battery, then starting the welding unit (1) so that the welding unit (1) performs circular laser welding on the two ends of the copper busbar in sequence; S2. During the working process of S1, the driving motor (22) is started, driving the worm (23) to rotate, so that the four worm wheels (24) rotate simultaneously, thereby driving the corresponding support plates (25) to rotate synchronously, and then driving the corresponding shaping plates (26) to simultaneously tightly fit the four sides of the "Ji"-shaped bend of the copper bar; thereby, two of the support plates (25) and the shaping plates (26) squeeze and shape the side walls of the raised portion of the "Ji"-shaped bend of the copper bar, and the other two support plates (25) and the shaping plates (26) limit and fix the other two side walls of the "Ji"-shaped bend of the copper bar; S3, inserting the portion of the copper bar that is not tilted upwards between the fixed roller (33) and the adjusting member (36), so that the outer wall of the fixed roller (33) fits the bottom of the copper bar. Since the copper bar is tilted upwards, the bottom of the copper bar is in its original horizontal position; S4, then the fixed motor (32) is started, driving the fixed roller (33) to rotate, and driving the adjusting member (36) to rotate simultaneously through the fixed gear (34), the tooth column (35) and the adjusting gear (37), so that the fixed roller (33) and the adjusting member (36) simultaneously roll and straighten the bottom and top of the copper bar; S5. During the working process of S4, the adjusting member (36) is also activated, so that the adjusting member (36) gradually slides close to the fixed roller (33) during the rolling straightening process, and squeezes the copper bar toward the fixed roller (33) to make it close, so that the copper bar is gradually straightened to the original horizontality.

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