A welding ribbon processing device, processing method and back contact battery welding machine

Abstract

The present invention discloses a solder ribbon processing device, processing method, and back-contact battery welding machine, comprising a bracket, a support plate, a pressure rod, and a drive mechanism. The bracket comprises a mounting plate and a top plate for placing the solder ribbon. The support plate comprises a plate body and a protrusion. The plate body of the support plate is connected to the bracket, and one side of the plate body protrudes outward to form a protrusion. The protrusion has a shaping groove formed on it, and the bottom surface of the shaping groove is a curved surface. The pressure rod is arranged on the side of the support plate where the protrusion is located, and the rod head of the pressure rod is located above the protrusion. The pressure rod includes a curved bottom surface extending toward the protrusion, and the curved bottom surface matches the curvature of the curved surface of the shaping groove. The drive mechanism is arranged on the mounting plate and connected to the pressure rod. The drive mechanism drives the curved bottom surface of the pressure rod toward or away from the curved surface of the shaping groove. The shaped solder ribbon is slightly curved in the middle, which reserves the shrinkage of the solder ribbon after welding and significantly reduces the degree of warping of the two battery cells.

Description

Technical Field

[0001] The present invention belongs to the field of solar cell welding, and in particular relates to a welding ribbon processing device, a welding ribbon processing method and a back contact cell welding machine. Background Art

[0002] Back Contact (BC) cells are a type of solar cell technology that integrates all positive and negative metal contacts on the back. Its front-side grid-free design can absorb more sunlight.

[0003] During the BC battery manufacturing process, the incoming materials are more than 2 battery cells. Figure 1 The diagram shows three cells. A first soldering ribbon A1 (dashed lines) connects the adjacent first cell B1 to the second cell B2. A second soldering ribbon A2 (solid lines) connects the adjacent second cell B2 to the third cell B3. The first soldering ribbon A1 is welded to the pad on the first cell B1 to form a first solder joint C1. The second soldering ribbon A2 is welded to the pad on the second cell B2 to form a second solder joint C2. The pad serves as the metal contact point for the grid lines on the cell surface.

[0004] like Figure 2 As shown in the figure, the temperature of welding two adjacent battery cells with welding ribbons is about 200℃. Both the battery cells and the welding ribbons will expand due to the thermal expansion. The structure and material of the welding ribbons are different from those of the battery cells, and the thermal expansion coefficient of the welding ribbons is higher than that of the battery cells. After welding is completed, the welding ribbons and the battery cells cool down synchronously, and the shrinkage of the welding ribbons is greater than that of the battery cells. This will cause the battery cells to warp or tear, seriously affecting the yield of BC batteries. Summary of the Invention

[0005] The main purpose of the present invention is to provide a welding strip processing device, a processing method and a back contact battery welding machine to avoid warping or tearing damage of the battery cell and improve the yield of the BC battery.

[0006] The present invention achieves the above-mentioned object through the following technical solutions: A welding ribbon processing device includes a bracket, a supporting plate, a pressure rod and a driving mechanism, the bracket includes a mounting plate and a top plate for placing the welding ribbon;

[0007] The supporting plate includes a plate body and a convex portion. The plate body of the supporting plate is connected to the bracket. One side of the plate body bulges outward to form a convex portion. A shaping groove is provided on the convex portion. The bottom surface of the shaping groove is an arc surface.

[0008] The pressure rod is arranged on the side where the convex portion of the support plate is located, and the rod head of the pressure rod is located above the convex portion. The pressure rod includes an arc-shaped bottom surface extending toward the convex portion, and the arc-shaped bottom surface is consistent with the arc of the shaping groove;

[0009] The driving mechanism is arranged on the mounting plate and is connected to the pressure rod. The driving mechanism drives the arc bottom surface of the pressure rod to approach or move away from the arc surface of the shaping groove.

[0010] Furthermore, the pressure rod also includes an elastic member, which is arranged on the rod head, and the arc-shaped bottom surface is formed by the lower part of the elastic member extending toward the convex part.

[0011] Furthermore, an annular groove is provided on the outer periphery of the rod head, and the elastic member is sleeved in the annular groove.

[0012] Furthermore, the cross section of the rod head perpendicular to its length direction is square, and the elastic member sleeved on the rod head is in the shape of a square frame.

[0013] Furthermore, a through hole is provided in the middle of the top plate, and the plates on both sides of the through hole are respectively a first plate and a second plate, and both the first plate and the second plate are provided with a limiting groove for placing the welding strip;

[0014] The supporting plate and the pressure rod are both located in the through hole area. The limiting groove on the first plate body is consistent with the long direction of the shaping groove and is connected to each other. The arc surface of the shaping groove extends outward and downward from the inner groove end of the limiting groove, and the outer end edge of the arc surface is lower than the bottom surface of the upper limiting groove on the second plate body.

[0015] Furthermore, the welding strip processing device also includes a cutting assembly arranged on one side of the top plate, the cutting assembly includes a first cutter and a second cutter, the first cutter is fixed to one side of the top plate, the second cutter is slidably matched with the mounting plate, and the second cutter cooperates with the first cutter to cut the welding strip on the top plate;

[0016] The cutting assembly also includes a third cylinder, a cylinder body of the third cylinder is fixed to the back side of the mounting plate, a telescopic rod of the third cylinder is connected to the second cutter, and the third cylinder drives the second cutter to slide.

[0017] Furthermore, the solder strip processing device also includes an avoidance mechanism, which drives the rod head and the first cutter to move synchronously, so that the rod head and the first cutter can be in an avoidance position of the solder strip picking and placing path on the top plate.

[0018] Furthermore, the bracket also includes a bottom plate, two side plates and a support plate. The bottom ends of the two side plates are connected to the bottom plate surface, and the top ends of the two side plates are respectively connected to the two ends of the top plate. The two side plates are spaced apart and arranged opposite to each other.

[0019] The supporting plate is located between the first plate body and the second plate body. The plate surface of the supporting plate and the bottom surface of the limiting groove of the first plate body are on the same plane. The plate surface of the supporting plate is used to place the welding strip. The outer end edge of the arc surface of the shaping groove is lower than the plate surface of the supporting plate that supports the welding strip.

[0020] Furthermore, the driving mechanism includes two first slide rails, two first sliders and a first cylinder. The two first slide rails are fixed to the mounting plate. The length directions of the two first slide rails are parallel to each other and perpendicular to the plate surface of the protrusion.

[0021] The two first sliding blocks are fixed to the connecting plate at the lower portion of the pressure rod, and the first sliding blocks of the connecting plate are slidably engaged with the first slide rail;

[0022] The cylinder body of the first cylinder is fixed to the mounting plate, the telescopic rod of the first cylinder is fixed to the connecting plate at the lower part of the pressure rod, and the first cylinder drives the rod head on the connecting plate to move closer to or away from the convex part.

[0023] Furthermore, the avoidance mechanism includes two second slide rails, two second sliders and a second cylinder. The two second slide rails are fixed to the bottom plate. The length directions of the two second slide rails are parallel to each other and perpendicular to the width direction of the shaping groove on the supporting plate.

[0024] The two second sliding blocks are fixed to the bottom end of the mounting plate, and the second sliding blocks are slidably engaged with the second slide rail;

[0025] The cylinder body of the second cylinder is fixed to the side plate, the telescopic rod of the second cylinder is connected to the plate surface of the mounting plate, the second cylinder drives the mounting plate to drive the rod head close to or away from the corresponding shaping groove, and the second cylinder drives the mounting plate to drive the first cutter close to or away from the corresponding limit groove.

[0026] The present invention also provides a method for processing a solder strip based on the aforementioned solder strip processing device, comprising:

[0027] S10: After the welding strip is placed on the top plate, the welding strip is located in the shaping groove of the supporting plate;

[0028] S20: The driving mechanism drives the arc bottom surface of the pressure rod to move toward the arc surface of the shaping groove. The arc bottom surface of the pressure rod presses the welding strip in the shaping groove. The welding strip between the shaping groove and the top plate bends downward to complete the shaping. At the same time, the welding strip pressed by the pressure rod can be cut.

[0029] The present invention also provides a back contact battery welding machine, comprising the aforementioned welding strip processing device.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] First, the shaped ribbon is slightly bent in the middle, allowing for post-weld shrinkage. This significantly reduces the stress between the first and second solder joints, significantly improving the warping of the two cells. The warping height can be reduced by over 30%, preventing cell tearing and significantly improving the yield of BC cells.

[0032] Second, the welding strip is located in the shaping groove. When the arc-shaped bottom surface of the pressure rod presses down the welding strip in the shaping groove, the welding strip will be laterally offset. The inner wall of the shaping groove can limit the lateral offset of the welding strip and ensure the shaping quality of the welding strip.

[0033] Third, the present invention integrates the pressing and shaping of the welding strip, and does not require an additional welding strip pressing and limiting mechanism, thereby improving the integration of the equipment and reducing the equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a top view of the back of the BC cell after welding with the solder ribbon;

[0035] Figure 2 This is the front view of the BC cell after the back side is welded to the welding ribbon;

[0036] Figure 3 A three-dimensional diagram of a welding ribbon processing device according to an embodiment of the present invention;

[0037] Figure 4 for Figure 3 Stereoscopic view of the side after sectioning in the middle DD direction;

[0038] Figure 5 for Figure 4 Schematic diagram of the structure at E in the middle after removing the compression rod;

[0039] Figure 6 for Figure 4 Enlarged schematic diagram of the structure at E in the middle.

[0040] Figure 7 for Figure 6 Schematic diagram of the club head after pressing down;

[0041] Figure 8 for Figure 3 The other side stereogram after mid-DD section;

[0042] Figure 9 is a three-dimensional diagram of the bracket;

[0043] Figure 10 This is a schematic diagram of the first state of the soldering ribbon after being welded to two solar cells;

[0044] Figure 11 This is a schematic diagram of the second state of the soldering ribbon after being welded to two solar cells;

[0045] Figure 12 Schematic diagram of the solder ribbon and battery cell after cooling after shaping;

[0046] Figure 13 A three-dimensional diagram of two welding ribbon processing devices after being matched;

[0047] Figure 14 This is a three-dimensional diagram of multiple welding ribbon processing devices after coordination. DETAILED DESCRIPTION

[0048] Please refer to Figure 3-Figure 12The present embodiment is a device for processing a soldering ribbon, comprising a bracket 10, a supporting plate 20, a pressing rod 30 and a driving mechanism. The bracket 10 comprises a mounting plate 14 and a top plate 11 for placing the soldering ribbon.

[0049] The supporting plate 20 includes a plate body and a convex portion 21 . The plate body of the supporting plate 20 is connected to the bracket 10 . One side of the plate body protrudes outward to form the convex portion 21 . A shaping groove 22 is provided on the convex portion 21 . The bottom surface of the shaping groove 22 is an arc surface 221 .

[0050] The pressure rod 30 is arranged on the side of the convex portion 21 of the supporting plate 20, and the rod head 31 of the pressure rod 30 is located above the convex portion 21. The pressure rod 30 includes an arc-shaped bottom surface 321 extending toward the convex portion 21, and the arc-shaped bottom surface 321 matches the arc surface 221 of the shaping groove 22.

[0051] The driving mechanism is disposed on the mounting plate 14 and is connected to the pressing rod 30 . The driving mechanism drives the arcuate bottom surface 321 of the pressing rod 30 to move closer to or away from the arcuate surface 221 of the shaping groove 22 .

[0052] like Figure 6 As shown, after the welding strip A1 is placed on the top plate 11, the welding strip A1 is located in the shaping groove 22 of the supporting plate 20; the driving mechanism drives the arc bottom surface 321 of the pressure rod 30 to move toward the arc surface 221 of the shaping groove 22, as shown in FIG. Figure 7 As shown, the arc-shaped bottom surface 321 of the pressure rod 30 presses the welding strip in the shaping groove 22, and the middle part A11 of the welding strip between the shaping groove 22 and the top plate 11 bends downward to complete the shaping. At the same time, the welding strip pressed by the pressure rod 30 can be cut.

[0053] The arc-shaped bottom surface 321 of the pressure rod 30 cooperates with the arc surface 221 of the shaping groove 22 to play two main functions. On the one hand, it shapes the welding strip A1 so that the middle part A11 of the welding strip is slightly bent; on the other hand, it presses the welding strip A1 for subsequent cutting assembly cutting.

[0054] The technical effects brought about by the above technical solution are as follows:

[0055] First, after the first cell B1 and the second cell B2 are welded by the welding ribbon A1, the two cells are adsorbed on the conveyor belt, that is, the relative positions of the two cells are fixed. When the two cells and the welding ribbon are cooled synchronously, the shrinkage of the welding ribbon A1 is large. Figure 12 As shown in the figure, the middle part A11 of the solder strip is relatively flat after shrinkage.

[0056] In short, if Figure 10 and Figure 11As shown, the center portion A11 of the shaped ribbon is slightly bent, allowing for post-weld shrinkage. This significantly reduces the stress between the first and second solder joints C1 and C2, improving the warpage of the two cells. The cell warpage height H can be reduced by over 30%, minimizing cell warpage and preventing cell tearing damage, significantly improving the yield of BC cells.

[0057] Second, if Figure 5-Figure 7 As shown, the welding strip A1 is located in the shaping groove 22. When the arc-shaped bottom surface 321 of the pressure rod 30 presses down the welding strip A1 in the shaping groove 22, the welding strip A1 will be laterally offset. The inner wall of the shaping groove 22 can limit the lateral offset of the welding strip A1, thereby ensuring the shaping quality of the welding strip A1.

[0058] Third, the present invention integrates the pressing and shaping of the welding strip, and does not require an additional welding strip pressing and limiting mechanism, thereby improving the integration of the equipment and reducing the equipment cost.

[0059] One side of the supporting plate 20 protrudes outward to form at least two protrusions 21 , and two adjacent protrusions 21 are spaced apart. The pressure rod 30 has at least two rod heads 31 , and the rod head 31 is located between the two protrusions 21 .

[0060] The driving mechanism specifically includes a first cylinder 41, two first slide rails 42, and two first sliders 43. The two first slide rails 42 are fixed to the mounting plate 14, and the length directions of the two first slide rails 42 are parallel to each other and perpendicular to the plate surface of the protrusion 21;

[0061] The two first sliders 43 are fixed to the connecting plate 33 at the lower portion of the pressure rod 30 , and the first sliders 43 of the connecting plate 33 are slidably engaged with the first slide rail 42 ;

[0062] like Figure 4 As shown, the cylinder body of the first cylinder 41 is fixed to the mounting plate 14 , and the telescopic rod of the first cylinder 41 is fixed to the connecting plate 33 at the lower part of the pressure rod 30 . The first cylinder 41 drives the rod head 31 on the connecting plate 33 to move closer to or away from the protrusion 21 .

[0063] like Figure 6-Figure 7 As shown, the pressing rod 30 further includes an elastic member 32 , which is disposed on the rod head 31 , and the arc-shaped bottom surface 321 is formed by the lower portion of the elastic member 32 extending toward the convex portion 21 .

[0064] An elastic member 32 is additionally provided on the rod head 31. On the one hand, due to the processing error of the curvature of the welding strip itself and the depth of the shaping groove 22, the welding strip A1 may be difficult to be stably compressed and shaped. The elastic member 32 contracts under pressure and restores its shape when the pressure is released. During the compression and shaping process, the elastic member 32 can compensate for the processing error of the curvature of the welding strip itself and the depth of the shaping groove 22, thereby improving the stability of the compression and shaping of the welding strip A1.

[0065] On the other hand, when the design requirements for welding strip compression and shaping change, it is sufficient to replace the elastic member 32 that meets the requirements, thereby significantly reducing the cost of equipment structure changes caused by the change in design requirements.

[0066] An annular groove is provided on the outer periphery of the rod head 31, and the elastic member 32 is sleeved in the annular groove. The annular groove provided on the rod head can reliably limit the elastic member 32, thereby preventing the elastic member 32 from falling out during operation and improving the limiting reliability of the welding strip A1.

[0067] In addition, the relative position of the annular groove on the outer periphery of the rod head 31 and the shaping groove 22 is determined, and the elastic member 32 is sleeved in the annular groove, which is the designed position of the elastic member 32. There is no need to adjust the position of the elastic member 32 on the rod head 31, thereby improving installation efficiency.

[0068] The cross section of the rod head 31 perpendicular to its length is square, and the elastic member 32 sleeved on the rod head 31 is in a square frame shape. The arc surface 221 on the bottom of the elastic member 32 increases the pressing area of ​​the welding strip A1 to ensure that the welding strip A1 can be reliably limited.

[0069] The elastic member 32 can be made of elastic material such as rubber.

[0070] See also Figure 9 The overall structure of the bracket 10 is described below. A through hole 113 is provided in the middle of the top plate 11 of the bracket 10. The plates on both sides of the through hole 113 are respectively a first plate 111 and a second plate 112. The first plate 111 and the second plate 112 are both provided with a limiting groove 114 for placing the welding strip.

[0071] like Figure 4 As shown, the support plate 20 and the pressure rod 30 are both located in the through hole 113 area, the limiting groove 114 on the first plate body 111 is consistent with the length direction of the shaping groove 22 and is connected to each other, and the arc surface 221 of the shaping groove 22 is formed by extending outward and downward from the inner groove end of the limiting groove 114, and the outer end edge of the arc surface 221 is lower than the bottom surface of the upper limiting groove 114 on the second plate body 112.

[0072] When the welding ribbon A1 is placed on the top plate 11 , the welding ribbon A1 is placed in the limiting grooves 114 of the first plate 111 and the second plate 112 . The limiting grooves 114 of the first plate 111 and the second plate 112 can reliably limit the width direction of the welding ribbon A1 .

[0073] The shaping groove 22 and the second plate 112 are two bearing positions of the welding strip A1. When the arc bottom surface 321 of the elastic member 32 presses the welding strip A1 on the shaping groove 22 downward, as shown in FIG. Figure 4 and Figure 7As shown, the welding strip A1 is bent from the low position of the outer end of the arc surface 221 to the high position of the second plate 112, so that the middle part of the welding strip A1 can form a smooth arc segment, avoiding the formation of non-arc surface shapes such as sharp angles in the middle part of the welding strip A1, which affects the cooling and shrinkage of the welding strip A1. In the above scheme of the present invention, the middle part A11 of the welding strip can form a smooth arc to ensure the stability of the cooling and shrinkage of the welding strip A1, reduce the stress between the first welding point C1 and the second welding point C2 on the two battery cells, further reduce the warping degree of the battery cell, avoid battery cell tearing damage, and improve the yield rate of the BC battery.

[0074] The bracket 10 further includes two side panels 12, a bottom panel 13, and a support panel 15. The bottom ends of the two side panels 12 are connected to the bottom panel 13, and the top ends of the two side panels 12 are connected to the ends of the top panel 11, respectively. The two side panels 12 are spaced apart and arranged opposite to each other.

[0075] The supporting plate 15 is located between the first plate body 111 and the second plate body 112. The plate surface of the supporting plate 15 and the bottom surface of the limiting groove 114 of the first plate body 111 are located on the same surface. The plate surface of the supporting plate 15 is used to place the welding strip; the outer end edge of the arc surface 221 of the shaping groove 22 is lower than the plate surface of the supporting plate 15 that supports the welding strip.

[0076] According to the different design requirements of the curvature of the middle portion of the welding strip A1, the distance between the supporting plate 15 and the outer edge of the arc surface 221 can be adjusted to meet the design requirements for shaping the welding strip A1.

[0077] like Figure 8 As shown, the welding ribbon processing device further includes a cutting assembly provided on one side of the top plate 11, the cutting assembly including a first cutter 61 and a second cutter 62, the first cutter 61 being fixed to one side of the top plate 11, the second cutter 62 being slidably engaged with the mounting plate 14, and the second cutter 62 cooperates with the first cutter 61 to cut the welding ribbon on the top plate 11;

[0078] The cutting assembly also includes a third cylinder 63, whose body is fixed to the back of the mounting plate 14. Specifically, the first cylinder 41 is fixed to the top surface of the mounting plate 14, while the third cylinder 63 is fixed to the back surface. The telescopic rod of the third cylinder 63 is connected to the second cutter 62, and the third cylinder 63 drives the second cutter 62 to slide.

[0079] The solder strip processing device further includes an avoidance mechanism, which drives the rod head 31 and the first cutter 61 to move synchronously, so that the rod head 31 and the first cutter 61 can be in an avoidance position of the solder strip taking and placing path on the top plate 11.

[0080] like Figure 4 As shown, the avoidance mechanism includes two second slide rails 52, two second sliders 53 and a second cylinder 51. The two second slide rails 52 are fixed to the bottom plate 13, and the length directions of the two second slide rails 52 are parallel to each other and perpendicular to the width direction of the shaping groove 22 on the supporting plate 20;

[0081] The two second sliders 53 are fixed to the bottom end of the mounting plate 14 , and the second sliders 53 are slidably engaged with the second slide rails 52 ;

[0082] The cylinder body of the second cylinder 51 is fixed to the side plate 12, and the telescopic rod of the second cylinder 51 is connected to the plate surface of the mounting plate 14. The second cylinder 51 drives the mounting plate 14 to drive the rod head 31 close to or away from the corresponding shaping groove 22. The second cylinder 51 drives the mounting plate 14 to drive the first cutter 61 close to or away from the corresponding limit groove 114.

[0083] During the process of laying the welding ribbon A1 on the top plate 11, and the process of the welding ribbon A1 being cut and hooked onto the battery cell for welding, the second cylinder 51 drives the mounting plate 14 to move along the M2 direction, and the rod head 31 and the first cutter 61 on the mounting plate 14 move synchronously so that the rod head 31 and the first cutter 61 are in the avoidance position of the welding ribbon A1 taking and placing path, which facilitates the welding ribbon A1 to be laid on the top plate 11 and the welding ribbon A1 to be hooked to the next process after cutting, thereby improving the processing efficiency of the welding ribbon A1.

[0084] The present invention provides an embodiment of a method for processing a solder strip, comprising:

[0085] S10: After placing the welding strip on the top plate 11, the welding strip is located in the shaping groove 22 of the supporting plate 20;

[0086] S20: The driving mechanism drives the arcuate bottom surface 321 of the pressure rod 30 to move toward the arcuate surface 221 of the shaping groove 22. The arcuate bottom surface 321 of the pressure rod 30 presses the welding strip in the shaping groove 22. While the welding strip between the shaping groove 22 and the top plate 11 bends downward to complete the shaping, the welding strip pressed by the pressure rod 30 can be cut.

[0087] The arc-shaped bottom surface 321 of the pressure rod 30 cooperates with the arc surface 221 of the shaping groove 22 to play two main functions. On the one hand, it shapes the welding strip A1 so that the middle part A11 of the welding strip is slightly bent; on the other hand, it presses the welding strip A1 for subsequent cutting assembly cutting.

[0088] After the first battery cell B1 and the second battery cell B2 are welded by the welding ribbon A1, the negative pressure on the conveyor belt adsorbs and fixes the two battery cells, that is, the relative positions of the two battery cells are fixed. When the two battery cells and the welding ribbon are cooled synchronously, the welding ribbon A1 shrinks significantly. The middle part A11 of the welding ribbon of the present invention is relatively flat after shrinkage.

[0089] Another embodiment of the present invention provides a method for processing a solder strip, comprising:

[0090] S10: Place the welding ribbon on the first plate 111, the second plate 112, and the supporting plate 15 on the top plate 11. The limiting grooves 114 of the first plate 111 and the second plate 112 can reliably limit the width direction of the welding ribbon A1.

[0091] S20: The first cylinder 41 drives the arc-shaped bottom surface 321 of the pressure rod 30 to move downward along the M1 direction. The arc-shaped bottom surface 321 of the pressure rod 30 presses the welding strip in the shaping groove 22, and the welding strip between the shaping groove 22 and the supporting plate 15 bends downward to complete the shaping;

[0092] S30: The third cylinder 63 drives the second cutter 62 to move up along the M1 direction. The second cutter 62 cooperates with the first cutter 61 to cut the welding strip pressed by the arc-shaped bottom surface 321 of the pressing rod 30. The third cylinder 63 drives the second cutter 62 to move down along the M1 direction and reset.

[0093] S40: The first cylinder 41 drives the arc-shaped bottom surface 321 of the pressing rod 30 to move up and back to its original position in the direction M1, thereby releasing the constraint on the welding strip A1;

[0094] S50: The second cylinder 51 drives the rod head 31 and the first cutter 61 on the mounting plate 14 to retract synchronously along the direction M2, and the rod head 31 and the first cutter 61 are in an avoidance position of the path where the welding ribbon A1 is hooked;

[0095] S60: hook the cut welding ribbon A1 to the welding position on the two battery cells;

[0096] S70: Repeat S10.

[0097] Another embodiment of the present invention is a back contact battery welding machine, comprising the aforementioned welding ribbon processing device. Figure 13 As shown, two solder strip processing devices 100 of the back contact battery welding machine can be arranged side by side, and more than two solder strip processing devices 100 can process the solder strips separately according to needs.

[0098] like Figure 14 As shown, a plurality of solder strip processing devices 100 of the back contact battery welding machine can be arranged side by side, and the plurality of solder strip processing devices 100 can process the solder strips separately according to needs.

[0099] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A welding strip processing device, characterized in that: include: The bracket includes a mounting plate, a top plate for placing a welding strip, a bottom plate, and two side plates connected to the bottom plate, the top ends of the two side plates are respectively connected to the two ends of the top plate, the two side plates are spaced apart and arranged opposite to each other, a through hole is provided in the middle of the top plate, the plates on both sides of the through hole are respectively a first plate body and a second plate body, both the first plate body and the second plate body are provided with a limiting groove for placing the welding strip, a supporting plate is provided between the first plate body and the second plate body, the plate surface of the supporting plate and the bottom surface of the limiting groove of the first plate body are located on the same surface, and the plate surface of the supporting plate is for placing the welding strip; The supporting plate includes a plate body and a convex portion, the plate body of the supporting plate is connected to the bracket, one side of the plate body protrudes outward to form a convex portion, a shaping groove is provided on the convex portion, and the bottom surface of the shaping groove is an arc surface; the supporting plate is located in the through-hole area, the shaping groove and the limiting groove on the first plate body are consistent in length direction and are connected to each other, the arc surface of the shaping groove extends outward and downward from the inner groove end of the limiting groove, and the outer end edge of the arc surface is lower than the bottom surface of the upper limit groove on the second plate body and the plate surface of the supporting plate carrying the welding strip; A pressure rod is provided on the side of the support plate where the convex portion is located, with the rod head of the pressure rod located above the convex portion, and the pressure rod includes an arc-shaped bottom surface extending toward the convex portion, and the arc-shaped bottom surface is consistent with the arc of the shaped groove; A driving mechanism is provided on the mounting plate, the driving mechanism being connected to the pressure rod, and the driving mechanism drives the arc-shaped bottom surface of the pressure rod to move closer to or away from the arc-shaped surface of the shaping groove; A cutting assembly includes a first cutter fixed to one side of the top plate, a second cutter slidably engaged with the mounting plate, and a third cylinder fixed to the back side of the mounting plate. The second cutter cooperates with the first cutter to cut the welding strip on the top plate. The telescopic rod of the third cylinder is connected to the second cutter, and the third cylinder drives the second cutter to slide. The avoidance mechanism includes a second slide rail fixed to the base plate, two second sliders fixed to the bottom end of the mounting plate, and a second cylinder fixed to the side plate. The length directions of the two second slide rails are parallel to each other and perpendicular to the width direction of the shaping groove on the support plate. The second slider slides in cooperation with the second slide rail; the telescopic rod of the second cylinder is connected to the plate surface of the mounting plate, and the second cylinder drives the mounting plate to drive the rod head close to or away from the corresponding shaping groove, and the second cylinder drives the mounting plate to drive the first cutter close to or away from the corresponding limit groove, so that the rod head and the first cutter can be in the avoidance position of the welding strip picking and placing path.

2. The welding strip processing device according to claim 1, characterized in that The pressure rod also includes: The elastic member is arranged on the rod head, and the arc-shaped bottom surface is formed by extending the lower part of the elastic member toward the convex part.

3. The welding strip processing device according to claim 2, characterized in that: An annular groove is provided on the outer periphery of the rod head, and the elastic member is sleeved in the annular groove.

4. The welding strip processing device according to claim 2 or 3, characterized in that: The cross section of the rod head perpendicular to the length direction thereof is square, and the elastic member sleeved on the rod head is in the shape of a square frame.

5. The welding strip processing device according to claim 1, characterized in that: The driving mechanism comprises: Two first slide rails fixed to the mounting plate, wherein the length directions of the two first slide rails are parallel to each other and perpendicular to the plate surface of the protrusion; Two first sliding blocks are fixed to the connecting plate at the lower portion of the pressure rod, and the first sliding blocks of the connecting plate are slidably engaged with the first slide rail; The first cylinder has a cylinder body fixed to the mounting plate, a telescopic rod of the first cylinder fixed to the connecting plate at the lower part of the pressure rod, and the first cylinder drives the rod head on the connecting plate to move closer to or away from the convex portion.

6. A method for processing a welding strip based on the welding strip processing device according to claim 1, characterized in that: include: S10: After the welding strip is placed on the top plate, the welding strip is located in the shaping groove of the supporting plate; S20: The driving mechanism drives the arc bottom surface of the pressure rod to move toward the arc surface of the shaping groove, and the arc bottom surface of the pressure rod presses the welding strip in the shaping groove. The welding strip between the shaping groove and the top plate bends downward to complete the shaping, and the welding strip pressed by the pressure rod can be cut.

7. A back contact battery welding machine, characterized in that: It comprises the welding strip processing device as described in any one of claims 1-5.

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