A welding device and method for self-calibration and continuous laying welding of welding strips

Abstract

The present application provides a welding string device and method with self-calibration and continuous laying welding of welding strips, the device includes: a battery cell conveying mechanism, which is used to carry and convey battery cells placed at a set spacing, the battery cell conveying mechanism includes a battery cell fixing structure, the battery cell fixing structure is used to fix the position of the battery cell during the conveying process; a welding strip guiding mechanism, which is used to guide the welding strip during the continuous conveying of the welding strip; a welding mechanism, which is used to perform laser, infrared or electromagnetic induction welding of the welding strip and the pad point on the battery cell. By fixing the position of the battery cell on the conveying mechanism, this solution can use the battery cell that has been welded to drive the subsequent welding strip to be conveyed forward, so that the battery string can be produced with a continuous welding strip, avoiding the intermediate handling process of the welding strip, which can not only ensure the accuracy of the welding strip placement, but also improve production efficiency. The overall structure of the equipment is simple and compact, which can effectively reduce the failure rate and subsequent maintenance costs, and improve work efficiency and production capacity.

Description

Technical Field

[0001] The invention relates to a battery cell string welding technology, and in particular to a string welding device and method for self-calibration and continuous laying welding of welding strips. Background Art

[0002] In the existing battery string production process, the soldering ribbon is usually cut into wires first, and then moved to the battery cell for welding. During the process of moving the soldering ribbon, the position of the soldering ribbon is easily deviated, resulting in welding failure. Therefore, in the existing battery cell string welding process, the soldering ribbon needs to be repositioned and pulled every time a group of battery cells are welded, resulting in the inability to perform continuous welding. Summary of the invention

[0003] The purpose of the present invention is to provide a series welding device and method with self-calibration and continuous laying welding of welding strips, so as to be able to use continuous welding strips, avoid the intermediate transportation of the welding strips, simplify the process and mechanism, and have obvious advantages in early design and subsequent maintenance.

[0004] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0005] According to a first aspect of the present invention, there is provided a welding string device for self-calibration and continuous laying welding of welding strips, comprising:

[0006] A cell conveying mechanism, used for carrying and conveying cells placed at a set interval, the cell conveying mechanism comprising a cell fixing structure, the cell fixing structure being used for fixing the position of the cell during the conveying process;

[0007] The welding strip guiding mechanism is used to guide the welding strip during the continuous conveying process of the welding strip;

[0008] The welding mechanism is used to weld the welding ribbon to the pad points on the battery cell by laser, infrared or electromagnetic induction.

[0009] According to a second aspect of the present invention, there is also provided a method for continuously laying a welding ribbon based on the above-mentioned string welding device, comprising the following steps:

[0010] The welding strip is welded to the pad point on the battery cell by a welding mechanism;

[0011] The battery cell conveying mechanism drives the battery cell to step forward;

[0012] The subsequent welding ribbons are transported forward driven by the completed welded battery cells.

[0013] Based on the first aspect of the present invention, in one embodiment, the solder ribbon guiding mechanism includes a self-calibration mechanism, and the self-calibration mechanism can adjust the position of the solder ribbon according to the relative position of the solder ribbon and the battery cell.

[0014] Based on the first aspect of the present invention, in one embodiment, the welding mechanism includes:

[0015] A pressing needle module, arranged above the battery cell conveying mechanism, for pressing the soldering ribbon onto the battery cell;

[0016] A welder, disposed above the pressure needle module, for welding the welding ribbon to the battery cell;

[0017] The visual module is arranged in front of the welder and is used to provide positioning for the welder and the pressure needle module.

[0018] Based on the first aspect of the present invention, in one embodiment, the self-calibration mechanism is arranged in front of the welding mechanism, and the self-calibration mechanism includes a first guide roller and a lateral adjustment module, the first guide roller is transmission-connected to the lateral adjustment module, and the welding ribbon passes around from under the first guide roller. The relative position information of the welding ribbon and the battery cell obtained by the vision module is also used to calculate and generate the calibration control command of the self-calibration mechanism.

[0019] Based on the first aspect of the present invention, in one embodiment, the welding ribbon guiding mechanism further includes a second guiding roller, and the second guiding roller is arranged in front of the self-calibration mechanism, and the welding ribbon passes over the second guiding roller.

[0020] Based on the first aspect of the present invention, in one embodiment, the first guide roller and the second guide roller are both provided with welding strip limiting grooves along the circumferential direction.

[0021] Based on the first aspect of the present invention, in one embodiment, the device further comprises a wire drawing mechanism, and the wire drawing mechanism is used to draw the welding tape to the welding position after manual wire threading and before the first welding.

[0022] Based on the first aspect of the present invention, in one embodiment, the wire drawing mechanism includes a pneumatic clamping module and a driving module, the driving module drives the pneumatic clamping module to move along the battery cell conveying direction, and the pneumatic clamping module can clamp the end of the welding strip.

[0023] Based on the first aspect of the present invention, in one embodiment, the self-calibration mechanism further includes a first lifting drive module, and the lateral adjustment module is connected to the first lifting drive module.

[0024] Based on the first aspect of the present invention, in one embodiment, the device further comprises a cutter mechanism, and the cutter mechanism is used to cut off the welding strip during the first manual wire threading and when the production is stopped.

[0025] Based on the first aspect of the present invention, in one embodiment, the cutter mechanism includes a cutter assembly, the cutter assembly includes a solder strip passing groove, a cutter head and a cutting drive module, the cutter head is tightly arranged in the solder strip passing groove, and the cutting drive module drives the cutter head to move relative to the solder strip passing groove to cut the solder strip.

[0026] Based on the first aspect of the present invention, in one embodiment, the device further comprises a wire pressing mechanism, which is arranged in front of the cutter mechanism, and is used to press the solder strip when the cutter mechanism cuts the solder strip.

[0027] Based on the first aspect of the present invention, in one embodiment, the wire pressing mechanism includes a pneumatic lifting assembly, a wire pressing head and a wire clamping plate, the pneumatic lifting assembly can drive the wire pressing head to press down, a welding strip passage opening is provided on the wire clamping plate, and the wire clamping plate and the wire pressing head are staggered front and back in the conveying direction.

[0028] Based on the first aspect of the present invention, in one embodiment, the welding strip is downward through the slot opening, the driving direction of the cutting drive module is horizontal, the cutter mechanism also includes a translation module, and the cutter assembly is connected to the translation module.

[0029] Based on the first aspect of the present invention, in one embodiment, the cutter mechanism further includes a second lifting drive module, and the translation module is connected to the second lifting drive module.

[0030] Based on the first aspect of the present invention, in one embodiment, the base of the wire pressing mechanism is fixed on the battery cell conveying mechanism, one end of the wire pressing mechanism is hinged to the base, and the other end of the wire pressing mechanism is connected to the base via a pin.

[0031] Based on the first aspect of the present invention, in one embodiment, the battery cell conveying mechanism includes a conveying belt, the battery cell fixing structure includes a vacuum adsorption module, the vacuum adsorption module is arranged under the conveying belt, the vacuum adsorption module is connected to a fan, a plurality of adsorption holes are provided on the vacuum adsorption module, and a plurality of ventilation holes are provided on the conveying belt.

[0032] Based on the first aspect of the present invention, in one embodiment, the battery cell conveying mechanism further includes a hot plate module, which is disposed under the conveying belt at the welding position and in front of the welding position, and is used to assist in heating the battery cells during welding.

[0033] Based on the first aspect of the present invention, in one embodiment, the device also includes a solder strip pre-pressing mechanism, which is arranged on the conveying path of the solder strip, and includes a pneumatic pressing die group, an upper die base and a lower die base, and the pneumatic pressing die group can drive the upper die base to press down, the upper die base has an upper concave arc pressing surface, and the lower die base has an upper convex arc pressing surface.

[0034] The beneficial effects of the embodiments of the present invention are: by fixing the position of the battery cell during the conveying process, the battery cell that has been welded can be used to drive the subsequent welding strip to be conveyed forward, so that the battery string can be produced with a continuous welding strip, avoiding the intermediate handling process and mechanism of the welding strip, which can not only ensure the accuracy of the welding strip placement, but also improve the production efficiency. The overall structure of the equipment is simple and compact, and the performance is stable, which can effectively reduce the failure rate and the subsequent maintenance cost, thereby greatly improving the work efficiency and production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of a self-calibration mechanism according to an embodiment of the present application;

[0039] Figure 3 is a schematic diagram of a battery cell conveying mechanism according to an embodiment of the present application;

[0040] Figure 4 is a schematic diagram of a vacuum adsorption module according to an embodiment of the present application;

[0041] Figure 5 is a schematic diagram of a hot plate module according to an embodiment of the present application;

[0042] Figure 6 is a schematic diagram of a wire drawing mechanism in an embodiment of the present application;

[0043] Figure 7 is a schematic diagram of a cutter mechanism in an embodiment of the present application;

[0044] Figure 8 It is a schematic diagram of the cutter mechanism from another perspective;

[0045] Fig. 9 is a schematic diagram of a wire pressing mechanism of an embodiment of the present application;

[0046] Fig.10 is a schematic diagram of a laser welding mechanism according to an embodiment of the present application;

[0047] Fig.11 This is a schematic diagram of the laser welding mechanism from another perspective;

[0048] Fig.12 It is another overall structural schematic diagram of an embodiment of the present application (with a welding strip pre-pressing mechanism);

[0049] Fig.13 It is a partial structural schematic diagram of the welding strip pre-pressing mechanism;

[0050] Among them: 1-cell conveying mechanism; 11-conveying belt; 11a-vent; 12-vacuum adsorption module; 12a-adsorption hole; 121-vacuum chamber; 122-pipeline; 13-hot plate module; 131-heating element; 132-fan pipeline;

[0051] 21-self-calibration mechanism; 211-first guide roller; 211a-welding strip limiting groove; 212-lateral adjustment module; 213-first lifting drive module; 22-second guide roller;

[0052] 3-laser welding mechanism; 31-needle pressing module; 311-needle pressing plate; 312-vertical driving module; 313-lateral driving module; 32-laser welding device; 33-vision module; 331-light source; 332-camera;

[0053] 4-wire drawing mechanism; 41-pneumatic clamping jaw module; 42-driving module; 43-avoidance module;

[0054] 5-cutter mechanism; 51-cutter assembly; 511-welding strip passing slot; 512-cutter head; 513-cutting drive module; 52-translation module; 53-second lifting drive module;

[0055] 6-wire pressing mechanism; 61-pneumatic lifting assembly; 62-wire pressing head; 63-wire clamping plate; 63a-welding strip through port; 64-base;

[0056] 7-welding strip pre-pressing mechanism; 71-pneumatic pressing die set; 72-upper die seat; 72a-upper pressing surface; 73-lower die seat; 73a-lower pressing surface;

[0057] 8- soldering ribbon; 9- battery cell. DETAILED DESCRIPTION

[0058] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0059] like Figure 1 As shown, the embodiment of the present application provides a welding strip self-calibration and continuous laying welding string welding equipment, including:

[0060] The cell conveying mechanism 1 is used to carry and convey the cells 9 placed at a set interval. For example, the cells 9 of the same cell string can be placed at an interval of 0.1 mm, and the cells of different cell strings can be placed at an interval of 10 mm. The cell conveying mechanism 1 includes a cell fixing structure, which is used to fix the position of the cell 9 during the conveying process;

[0061] A welding strip guiding mechanism, used for guiding the welding strip 8 during the continuous conveying process of the welding strip 8;

[0062] The laser welding mechanism 3 is used to weld the welding ribbon 8 to the pad point (or welding pad) on the battery cell 9. It should be noted that in this embodiment, laser welding is taken as an example, and in fact, infrared welding, electromagnetic induction welding and other methods can also be used for welding.

[0063] Based on the above equipment, the embodiment of the present application provides a method for continuous laying of welding strips, comprising the following steps:

[0064] The welding strip 8 is welded to the pad point on the battery cell 9 by the laser welding mechanism 3;

[0065] The battery cell conveying mechanism 1 drives the battery cell 9 to step forward;

[0066] The subsequent welding ribbon 8 is conveyed forward driven by the welded battery cell 9.

[0067] The above-mentioned equipment and method can use the completed welded battery cell to drive the subsequent welding strip to be transported forward by fixing the position of the battery cell during the conveying process, so that the battery string can be produced with continuous welding strip, simplifying the intermediate handling process and mechanism of the welding strip, which can not only ensure the accuracy of the welding strip placement, but also improve production efficiency. The overall structure of the equipment is simple and compact, and the performance is stable, which can effectively reduce the failure rate and subsequent maintenance costs, thereby greatly improving work efficiency and production capacity.

[0068] Furthermore, considering that the relative position of the welding ribbon 8 and the battery cell 9 may be disturbed and accumulated during the welding process, in a possible embodiment, the welding ribbon guide mechanism includes a self-calibration mechanism, which can adjust the position of the welding ribbon 8 in real time according to the relative position of the welding ribbon 8 and the battery cell 9 to ensure the laying accuracy of the welding ribbon 8. The self-calibration mechanism requires a visual module, and considering that the laser welding mechanism 3 is usually also provided with a visual camera, the same visual module can be shared to simplify the equipment structure.

[0069] Here, the laser welding mechanism 3 is introduced. In a possible embodiment, the structure of the laser welding mechanism 3 is as follows: Fig.10 and 11 As shown, including:

[0070] The pressing needle module 31 is arranged above the battery cell conveying mechanism 1, and is used to press the solder ribbon 8 onto the battery cell 9. The pressing needle module 31 may include a pressing needle plate 311, a vertical driving module 312, and a horizontal driving module 313. The vertical driving module 312 and the horizontal driving module 313 drive the pressing needle plate 311 to adjust its position. A plurality of pressing needles are arranged on the pressing needle plate 311, and the pressing needle positions avoid the pad points.

[0071] The laser welder 32 is disposed above the pin pressing module 31 and welds the welding ribbon 8 to the pad point of the battery cell 9 by sending a laser (in welding methods such as infrared welding and electromagnetic induction welding, a corresponding welder can be used instead of the laser welder).

[0072] The visual module 33 is disposed in front of the laser welder 32 and is used to provide positioning for the laser welder 32 and the needle pressing module 31. The visual module 33 may include a camera 332 and a light source 331, and the light source 331 provides illumination for the camera 332.

[0073] See also Figure 2 The self-calibration mechanism 21 is arranged in front of the laser welding mechanism 3. The self-calibration mechanism 21 includes a first guide roller 211 and a lateral adjustment module 212. The first guide roller 211 is transmission-connected to the lateral adjustment module 212. The welding tape 8 passes under the first guide roller 211. The relative position information between the welding tape and the battery cell obtained by the vision module 33 is also used to calculate and generate the calibration control command of the self-calibration mechanism. The first guide roller 211 is offset left and right according to the calibration control command to realize the automatic calibration of the welding tape relative to the position of each row of pad points on the battery cell, thereby ensuring that the laying accuracy of the welding tape is about 0.1 mm.

[0074] In a possible embodiment, the welding strip guiding mechanism further includes a second guiding roller 22 . The second guiding roller 22 is disposed in front of the self-calibration mechanism 21 , and the welding strip 8 passes over the second guiding roller 22 .

[0075] Furthermore, in order to limit the left and right positions of the welding strip 8 , welding strip limiting grooves 211 a are provided on the first guide roller 211 and the second guide roller 22 along the circumferential direction.

[0076] In order to realize the first welding between the welding ribbon 8 and the battery cell 9, a wire drawing mechanism 4 is also included. The wire drawing mechanism 4 is used to draw the welding ribbon 8 to the welding position after manual wire threading and before the first welding.

[0077] See also Figure 6 The wire drawing mechanism 4 includes a pneumatic clamping jaw module 41 and a driving module 42. The driving module 42 drives the pneumatic clamping jaw module 41 to move along the battery sheet conveying direction. The pneumatic clamping jaw module 41 can clamp the end of the welding strip 8. Before the first welding, the end of the welding strip can be manually fixed on the pneumatic clamping jaw module 41, and the wire drawing mechanism 4 drives the welding strip to the welding position for laser welding. Then the clamping jaw of the wire drawing mechanism 4 is released and raised to avoid under the drive of the avoidance module 43 (such as a motor screw structure), and the subsequent welding strip 8 is driven by the battery sheet 9.

[0078] In order to avoid the wire drawing mechanism 4, the self-calibration mechanism 21 also includes a first lifting drive module 213, and the lateral adjustment module 212 is connected to the first lifting drive module 213. When the wire is manually threaded, the first lifting drive module 213 rises to ensure that the self-calibration mechanism 21 remains in a high position. After the wire threading is completed, the first lifting drive module 213 drives the first guide roller 211 to descend, pressing the solder strip down close to the battery cell 9, so that the solder strip 8 is almost parallel to the battery cell 9, which is convenient for the subsequent pressing needle plate 311 to press down.

[0079] Considering that it is usually difficult to keep the ends of the welding strip flush after manual threading, and the welding strip needs to be cut when the equipment stops production, in a possible embodiment, the device also includes a cutting mechanism 5, which is used to cut the welding strip during the first manual threading and when production is stopped.

[0080] See also Figure 7 and Figure 8 The cutter mechanism 5 includes a cutter assembly 51, which includes a welding strip passing slot 511, a cutter head 512 and a cutting drive module 513. The cutter head 512 is closely arranged with the welding strip passing slot 511, and the cutting drive module 513 drives the cutter head 512 to move relative to the welding strip passing slot 511 to cut the welding strip 8. It is easy to understand that the cutter can cut the welding strip 8 horizontally or vertically, but considering that the cutter mechanism 5 also needs to be raised to avoid the wire drawing mechanism 4, horizontal cutting is adopted in this embodiment.

[0081] On this basis, in order to limit the vertical displacement of the welding strip 8 during cutting, a wire pressing mechanism 6 is further provided in front of the cutter mechanism 5 , and the wire pressing mechanism 6 is used to press the welding strip 8 when the cutter mechanism 5 cuts the welding strip 8 .

[0082] like Fig. 9 As shown, the wire pressing mechanism 6 includes a pneumatic lifting assembly 61, a wire pressing head 62 and a wire clamping plate 63. The pneumatic lifting assembly 61 can drive the wire pressing head 62 to press down. The wire clamping plate 63 is provided with a welding strip through hole 63a. The wire clamping plate 63 and the wire pressing head 62 are staggered front and back in the conveying direction. The welding strip 8 passes through the welding strip through hole 63a and is pressed down by the wire clamping head 62 to fall at the bottom of the welding strip through hole 63a.

[0083] Accordingly, the opening of the solder strip through slot 511 is downward, the driving direction of the cutting drive module 513 is horizontal, and the cutter mechanism 5 further includes a translation module 52, and the cutter assembly 51 is connected to the translation module 52. Before the cutting action is performed, the translation module 52 first drives the cutter mechanism 5 to move horizontally to ensure that the solder strip 8 is closely attached to one side of the solder strip through slot 511 to prevent the solder strip 8 from moving during the cutting process.

[0084] In order to avoid the wire drawing mechanism 4, the cutter mechanism 5 also includes a second lifting drive module 53, and the translation module 52 is connected to the second lifting drive module 53. When the wire is manually threaded, the second lifting drive module 53 keeps the cutter assembly 51 at a high position. After the manual threading is completed, the wire drawing mechanism 4 moves backward, the wire pressing mechanism 6 presses the welding strip 8, the cutter assembly 51 descends, and the end of the welding strip 8 is cut flush, and then the cutter assembly 51 rises, and the end of the welded strip 8 after cutting is manually fixed on the wire drawing mechanism 4, so that the initial end of the welded strip 8 is flush.

[0085] Furthermore, in order to facilitate manual threading, the wire pressing mechanism 6 can be designed as an openable structure. For example, the base 64 of the wire pressing mechanism 6 is fixed on the battery cell conveying mechanism 1, one end of the wire pressing mechanism 6 is hinged to the base 64, and the other end of the wire pressing mechanism 6 is connected to the base 64 through a latch. When manually threading, the latch is pulled out and the wire pressing mechanism 6 is rotated as a whole to open and make way. Manually, it is only necessary to pass the solder strip through the solder strip through-port 63a. After threading is completed, the wire pressing mechanism 6 is closed and the latch is inserted back.

[0086] like Figure 3 and Figure 4 The cell conveying mechanism 1 includes a conveying belt 11, and the cell fixing structure includes a vacuum adsorption module 12, which is arranged below the conveying belt 11 and maintains suction on the cell 9 during the entire conveying process. In terms of specific structure, the vacuum adsorption module 12 includes a plurality of vacuum chambers 121, which are connected to the fan through an air pipe 122, and a plurality of adsorption holes 12a are provided on the vacuum adsorption module 12, and a plurality of ventilation holes 11a are correspondingly provided on the conveying belt 11, so that vacuum suction can be formed on the surface of the conveying belt 11.

[0087] Preferably, the cell conveying mechanism 1 further comprises a hot plate module 13, which can be disposed under the conveying belt 11 at the welding position and in front of the welding position, and is used to assist in heating the cell 9 during laser welding. The hot plate module 13 itself has both a heating function and can provide vacuum suction. Figure 5 A possible structure of a hot plate module 13 is shown, in which a heating element 131 is arranged inside and connected to a fan through a fan pipeline 132.

[0088] Optionally, in order to facilitate the cutting of the welding strip in the subsequent process, the device may further include a welding strip pre-pressing mechanism 7, such as Fig.12 As shown, the solder strip pre-pressing mechanism 7 is arranged on the conveying path of the solder strip 8. Fig.13 The welding strip pre-pressing mechanism 7 includes a pneumatic pressing die set 71, an upper die seat 72 and a lower die seat 73. The pneumatic pressing die set 71 can drive the upper die seat 72 to press downward. The upper die seat 72 has an upward concave arc-shaped pressing surface, and the lower die seat 73 has an upward convex arc-shaped pressing surface. After the two are pressed together, the welding strip 8 can be partially bent upward, so that the subsequent cutting of the welding strip is easier.

[0089] To sum up, the embodiments of the present application provide a welding string equipment and method with self-calibration and continuous laying welding of welding strips. By using continuous welding strips, the intermediate transportation process and mechanism of the welding strips are avoided, which has obvious advantages in early design and subsequent maintenance, and speeds up the production rhythm of the equipment, reduces the subsequent maintenance costs, and can meet the production requirements of the back end of the battery string production line.

[0090] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

[0092] The above description is only a preferred example of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A welding device for self-calibration and continuous laying welding of welding strips, characterized in that: include: A cell conveying mechanism, used for carrying and conveying cells placed at a set interval, the cell conveying mechanism comprising a cell fixing structure, the cell fixing structure being used for fixing the position of the cell during the conveying process; The welding strip guiding mechanism is used to guide the welding strip during the continuous conveying process of the welding strip; The welding mechanism is used to weld the welding ribbon to the pad point on the battery cell by laser, infrared or electromagnetic induction; the subsequent welding ribbon is driven forward by the battery cell that has completed welding; The solder strip guiding mechanism includes a self-calibration mechanism, and the self-calibration mechanism can adjust the position of the solder strip according to the relative position of the solder strip and the battery cell; The welding mechanism comprises: A pressing needle module, arranged above the battery cell conveying mechanism, for pressing the soldering ribbon onto the battery cell; A welder, disposed above the pressure needle module, for welding the welding ribbon to the battery cell; A visual module, arranged in front of the welder, for providing positioning for the welder and the pressure needle module; The self-calibration mechanism is arranged in front of the welding mechanism, and comprises a first guide roller and a lateral adjustment module, wherein the first guide roller is transmission-connected to the lateral adjustment module, and the welding strip passes under the first guide roller. The relative position information of the welding strip and the battery cell obtained by the vision module is also used to calculate and generate the calibration control command of the self-calibration mechanism; The welding strip guiding mechanism further comprises a second guiding roller, which is arranged in front of the self-calibration mechanism, and the welding strip passes over the second guiding roller; The self-calibration mechanism further includes a first lifting drive module, and the lateral adjustment module is connected to the first lifting drive module; It also includes a cutter mechanism, which is used to cut off the welding strip when the wire is manually threaded for the first time and when production is stopped; The cutter mechanism comprises a cutter assembly, the cutter assembly comprises a welding strip passing slot, a cutter head and a cutting drive module, the cutter head is arranged closely with the welding strip passing slot, and the cutting drive module drives the cutter head to move relative to the welding strip passing slot to cut the welding strip; It also includes a wire pressing mechanism, which is arranged in front of the cutter mechanism and is used to press the welding strip when the cutter mechanism cuts the welding strip; The wire pressing mechanism includes a pneumatic lifting assembly, a wire pressing head and a wire clamping plate, wherein the pneumatic lifting assembly can drive the wire pressing head to press down, the wire clamping plate is provided with a welding ribbon passage opening, and the wire clamping plate and the wire pressing head are staggered front and back in the conveying direction; The welding strip is downward through the slot opening, the driving direction of the cutting drive module is horizontal, the cutter mechanism also includes a translation module, and the cutter assembly is connected to the translation module; The cutter mechanism further comprises a second lifting drive module, and the translation module is connected to the second lifting drive module; The base of the wire pressing mechanism is fixed on the battery cell conveying mechanism, one end of the wire pressing mechanism is hinged to the base, and the other end of the wire pressing mechanism is connected to the base through a latch; It also includes a wire drawing mechanism, which is used to draw the welding strip to the welding position after manual wire threading and before the first welding.

2. A method for continuously laying a welding ribbon based on the string welding equipment according to claim 1, characterized in that: The following steps are involved: The welding strip is welded to the pad point on the battery cell by a welding mechanism; The battery cell conveying mechanism drives the battery cell to step forward; The subsequent welding ribbons are transported forward driven by the finished welded battery cells.

3. The welding strip self-calibration and continuous laying welding string welding equipment according to claim 1 is characterized in that: The first guide roller and the second guide roller are both provided with welding strip limiting grooves along the circumferential direction.

4. The welding string welding equipment for self-calibration and continuous laying welding of welding strips according to claim 1 is characterized in that: The wire drawing mechanism comprises a pneumatic clamping jaw module and a driving module. The driving module drives the pneumatic clamping jaw module to move along the battery sheet conveying direction. The pneumatic clamping jaw module can clamp the end of the welding strip.

5. The welding string welding equipment for self-calibration and continuous laying welding of welding strips according to claim 1 is characterized in that: The battery cell conveying mechanism includes a conveying belt, and the battery cell fixing structure includes a vacuum adsorption module. The vacuum adsorption module is arranged below the conveying belt, the vacuum adsorption module is connected to a fan, a plurality of adsorption holes are opened on the vacuum adsorption module, and a plurality of ventilation holes are opened on the conveying belt.

6. The welding string welding equipment for self-calibration and continuous laying welding of welding strips according to claim 5 is characterized in that: The battery cell conveying mechanism further comprises a hot plate module, which is arranged under the conveying belt at the welding position and in front of the welding position, and is used for auxiliary heating of the battery cell during welding.

7. The welding string welding equipment for self-calibration and continuous laying welding of welding strips according to claim 1 is characterized in that: It also includes a solder strip pre-pressing mechanism, which is arranged on the conveying path of the solder strip, and includes a pneumatic pressing die set, an upper die seat and a lower die seat. The pneumatic pressing die set can drive the upper die seat to press downward, and the upper die seat has an upper concave arc-shaped pressing surface, and the lower die seat has an upper convex arc-shaped pressing surface.

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