CN115502506A - Series welding machine and battery series welding method - Google Patents

Abstract

The invention provides a stringer and battery stringer welding method. The stringer includes a ribbon feeder, a ribbon feeder, a ribbon puller, a ribbon attacher, a ribbon cutter, and a ribbon puller. section, battery sheet feeding section, conveying section and heating section, wherein: the ribbon pulling section pulls the welding ribbon so that the ribbon passes through the membrane ribbon attaching section and the ribbon cutting section in sequence; the membrane ribbon pulling section pulls the front film and The back film, so that the front film and back film to be attached enter the film tape attachment part; the film tape attachment part is used to attach the front film and the back film to the front and back of the welding ribbon respectively; the welding tape cutting part is used for The ribbon attached with the front film and the back film is cut into a ribbon assembly, the ribbon traction part is also used to place the ribbon assembly on the conveying part, and the battery sheet feeding part places the battery sheet on the conveying part; the heating part It is used to heat stacked battery sheets and ribbon assemblies to form battery strings. The stringer provided by the invention realizes the automatic stringing of the battery strings that need welding ribbons on both sides.

Description

A string welding machine and battery string welding method

technical field

The invention relates to the field of battery production, in particular to a string welding machine and a battery string welding method.

Background technique

Traditional solar cells lead the photo-generated current in the cell to the outside of the cell through the grid lines on it. Considering the final conductivity, the current grid lines are mostly printed with silver paste. According to different printing processes, the solar cell Divided into three main bars, four main bars and multiple main bars.

For the above-mentioned three busbars, four busbars and multi-busbar solar cells, at present, a plurality of welding ribbons are respectively welded to each busbar of the solar cell by flux to obtain a battery composed of several cells connected in series. String, and finally realize the conversion of light energy to electrical energy. However, the battery string obtained by welding the ribbon and the busbar not only has a large shading area, which affects the photoelectric conversion efficiency, but also has a high cost of silver paste. In order to overcome the above problems, crystalline silicon solar cells have emerged.

The existing stringing method of battery slices is: when stacking battery slices and ribbon groups, glue is dispensed on the battery slices. Next, heat and press the stacked battery sheets and the ribbon group, so that the solder ribbon group is bonded to the corresponding battery sheet by the melted glue, thereby obtaining a battery string.

In the existing method of stringing battery slices, in the process of stacking battery slices and ribbons, glue sticking cannot achieve firm bonding of battery slices and ribbons, thereby reducing the quality of the battery string.

Contents of the invention

In order to solve the above technical problems, the present invention firstly provides a stringer, which adopts the following technical scheme:

A stringer, comprising a ribbon feeding part, a ribbon feeding part, a ribbon pulling part, a ribbon attaching part, a ribbon cutting part, a ribbon pulling part, a cell feeding part, a conveying part and a heating part ,in:

The ribbon pulling part is configured to pull a plurality of parallel ribbons supplied by the ribbon supply part, so that the ribbons pass through the tape attaching part and the ribbon cutting part in sequence;

The film tape traction part is configured to pull the front film and the back film supplied by the film tape supply part, so that the predetermined length of the front film to be attached and the predetermined length of the back film to be attached enter into the film tape attachment part; The attached part is used to attach the front film to be attached to the front of the welding strip, and attach the back film to be attached to the back of the welding strip, and the front film and the back film attached to the welding strip are distributed at intervals;

The ribbon cutting part is used to cut the ribbon attached with the front film and the back film into a ribbon assembly, and the ribbon pulling part is also used to place the ribbon assembly on the conveying part, wherein each ribbon assembly includes The welding strip, the front film attached to the front part of the welding strip, and the back film attached to the rear part of the welding strip;

The battery sheet feeding part is used to place the battery sheet on the conveying part; wherein, the i-th battery sheet is stacked on the rear section of the i-th group of ribbon assemblies, and the front section of the i+1-th group of ribbon assemblies is stacked on On the i-th cell, i is any natural number greater than 0;

The heating part is used for heating the stacked battery sheets and ribbon assemblies to form a battery string.

The stringer provided by the invention realizes the automatic stringing of the battery strings that need welding ribbons on both sides. In particular, by setting the tape traction part and the film tape attaching part, the present invention automatically attaches the front film and the back film to the welding tape group, and the welding tape group finally passes through the front film and the back film attached thereto. The series connection of battery slices is implemented, thereby improving the connection strength between the ribbon group and the battery slices.

The present invention also provides another stringer, which adopts the following technical scheme:

A stringer, comprising a ribbon feeding part, a ribbon feeding part, a ribbon pulling part, a ribbon attaching part, a ribbon cutting part, a ribbon pulling part, a ribbon processing part, a cell feeding part, The conveying part and the heating part, in which:

The ribbon pulling part is configured to pull a plurality of parallel ribbons supplied by the ribbon supply part, so that the ribbons pass through the tape attaching part and the ribbon cutting part in sequence, and transfer the ribbons to the ribbon processing part;

The tape traction part is configured to pull the front film supplied by the film tape supply part, so that the predetermined length of the front film to be attached enters the film tape attachment part; the film tape attachment part is used to attach the front film to be attached to the front of the ribbon;

The ribbon cutting section is used to cut the ribbon attached with the front film into ribbon segments, and the ribbon processing section is used to cut the ribbon segments into ribbon assemblies and perform dislocation and spacing processing on the ribbon assemblies. And placing the dislocated and separated welding ribbon assembly on the conveying part, wherein each welding ribbon assembly includes a welding ribbon and a front film attached to the welding ribbon;

The battery sheet feeding part is used to place the battery sheet on the conveying part; wherein, the second half of the i-th group of welding ribbons is stacked on the i-th battery sheet, and the first half of the i-th group of welding ribbons is stacked on the i- On one cell, where i is any natural number greater than 1 and less than N+1;

The heating part is used for heating the stacked battery sheets and ribbon assemblies to form a battery string.

The stringer provided by the present invention realizes the automatic stringing of battery strings (IBC battery strings) that only need welding ribbons on one side. In particular, by setting the tape traction part and the film tape attaching part, the present invention automatically attaches the front film and the back film to the welding tape group, and the welding tape group finally passes through the front film and the back film attached thereto. The series connection of battery slices is implemented, thereby improving the connection strength between the ribbon group and the battery slices.

In some embodiments, the film tape attaching part includes a front film sticking mechanism and/or a back film sticking mechanism, and the welding tape passes through the front film sticking mechanism and/or the back film sticking mechanism; the film tape traction part includes a front film pulling mechanism and The back film traction mechanism, wherein: the front film traction mechanism is configured to pull the front film supplied by the film belt supply part, so that the front film to be attached enters the front film sticking mechanism, and the front film sticking mechanism is configured to suck and cut off The front film to be attached, and the cut-off front film to be attached are attached to the front of the ribbon; the back film traction mechanism is configured to pull the back film supplied by the film belt supply part, so that the back film to be attached enters the In the back film sticking mechanism, the back film sticking mechanism is configured to absorb and cut off the back film to be attached, and attach the cut back film to be attached to the back of the welding ribbon.

By setting the film tape attaching part and the film tape pulling part, the film tape attaching part and the film tape pulling part cooperate to automatically attach the front film and/or the back film to the welding tape.

In some embodiments, the front film sticking mechanism includes a front film adsorption assembly, a front film heating assembly, and a front film cutting assembly, wherein the front film adsorption assembly is located above the front film heating assembly, and the front film cutting assembly is positioned above the front film adsorption assembly. In the front of the component, the front film to be attached passes through the front film cutting assembly and enters between the front film adsorption assembly and the front film heating assembly; the front film adsorption assembly is configured to absorb the front film to be attached, and the front film cutting assembly is It is configured to cut off the front film to be attached that is absorbed by the front film adsorption component, and the front film adsorption component is also configured to press the front film to be attached to the front of the welding ribbon, and the front film heating component is used to heat the front film to be attached. Mask, so that the front side film to be attached is attached to the front side of the welding tape. The back film sticking mechanism includes a back film adsorption component, a back film heating component and a back film cutting component, wherein the back film adsorption component is located below the back film heating component, and the back film cutting component is located in front of the back film adsorption component. The attached back film passes through the back film cutting component and enters between the back film adsorption component and the back film heating component; the back film adsorption component is configured to absorb the back film to be attached, and the back film cutting component is configured to cut off the The back film to be attached is sucked by the back film adsorption component, and the back film adsorption component is also configured to press the back film to be attached to the back of the welding ribbon, and the back film heating component is used to heat the back film to be attached, so that the back film to be attached The attached back film is attached to the back of the ribbon.

By arranging the front film sticking mechanism to include a front film adsorption component, a front film heating component and a front film cutting component, the front film sticking mechanism realizes automatic cutting of the front film to be attached, and attaches the cut attached front film to the front of the ribbon. By setting the back film sticking mechanism to include a back film adsorption component, a back film heating component and a back film cutting component, the back film sticking mechanism realizes automatic cutting of the back film to be attached, and attaches the cut back film to be attached. to the back of the ribbon.

In some embodiments, the stringer also includes a front film feed mechanism and a back film feed mechanism; When the component cuts off the front film to be attached, clamp the front film to be attached, and push the clamped front film toward the front film traction mechanism after the front film cutting component cuts off the front film to be attached The back film feeding mechanism is located in the front of the back film cutting assembly, and the back film feeding mechanism is used to clamp the back film behind the back film to be attached when the back film cutting assembly cuts off the back film to be attached , and after the back film cutting assembly cuts off the back film to be attached, push the clamped back film toward the back film traction mechanism.

When the front film cutting assembly cuts off the current front film to be attached, the front film feeding mechanism realizes the clamping and positioning of the front film on the rear side of the current front film to be attached, and After the mask is cut off, push the clamped front film toward the front film traction mechanism, so that the front film traction mechanism can pull the next section of the front film to be attached between the front film adsorption component and the front film heating component. When the back film cutting assembly cuts off the current back film to be attached, the back film feeding mechanism realizes the clamping and positioning of the back film on the rear side of the current back film to be attached, and the current back film to be attached After the mask is cut off, push the clamped back film toward the back film traction mechanism, so that the back film traction mechanism can pull the next section of the back film to be attached between the back film adsorption component and the back film heating component.

In some embodiments, the ribbon processing section includes several first ribbon clamping assemblies, several second ribbon clamping assemblies, several first ribbon cutters, several The second welding ribbon cutter and welding ribbon conveying mechanism, wherein: several first welding ribbon clamping assemblies cooperate to clamp all the odd-numbered welding ribbon sections among the plurality of welding ribbon sections, each adjacent to the first welding ribbon clamp A first ribbon cutter is arranged between the holding assemblies, and each first ribbon cutter is used to cut off all the odd-numbered ribbon segments at corresponding positions, so as to obtain several groups of first ribbon assemblies. A plurality of second welding ribbon clamping assemblies cooperate to clamp all the even-numbered welding ribbon sections among the plurality of welding ribbon sections, and a second welding ribbon cutter is arranged between each adjacent second welding ribbon clamping assemblies , each second ribbon cutter is used to cut off all the even-numbered ribbon segments at corresponding positions, so as to obtain several sets of second ribbon assemblies. Before all the odd-numbered welding ribbon sections are cut off, several first welding ribbon clamping assemblies and several second welding ribbon clamping assemblies relatively translate in the first horizontal direction, so that all the odd-numbered welding ribbon sections Stagger a predetermined distance from all even-numbered welding ribbon segments in the first horizontal direction. After all the odd-numbered welding ribbon sections are cut off, each first welding ribbon clamping assembly respectively clamps a group of corresponding first welding ribbon assemblies, and each first welding ribbon clamping assembly is also configured to be in the first horizontal direction Separate the upper parts to implement the division of each group of the first ribbon components. After all the even-numbered welding ribbon sections are cut off, each second welding ribbon clamping assembly clamps a group of corresponding second welding ribbon assemblies respectively, and each second welding ribbon clamping assembly is also configured to be in the first horizontal direction Separate the upper parts to implement the division of each group of second ribbon assemblies. The ribbon conveying mechanism is used to place the first ribbon assembly and the second ribbon assembly on the conveying part after the misalignment and spacing are completed.

Through the cooperation of several first welding ribbon clamping assemblies, several second welding ribbon clamping assemblies, several first welding ribbon cutters, and several second welding ribbon cutters, the welding ribbon processing department realizes the welding ribbon The cutting of the section can obtain several ribbon components, and realize the staggering and spacing processing of the ribbon components. By setting up the ribbon conveying mechanism, it is realized that the ribbon assembly after staggering and spacing processing is transported to the conveying part.

In some embodiments, the ribbon feeder includes a plurality of ribbon rolls wound with ribbon, and each ribbon roll feeds out a solder ribbon; the film ribbon feeder includes a front film feed mechanism and a back film feeder Material mechanism, wherein, the front film feeding mechanism is configured to supply a plurality of front films, and each front film corresponds to at least one welding ribbon; the back film feeding mechanism is configured to supply a plurality of front films, and each back film corresponds to at least one A ribbon.

By arranging a plurality of welding ribbon coils, synchronous feeding out of a plurality of welding ribbons is realized. By setting the front film feeding mechanism and the back film feeding mechanism, the feeding of the front film and the back film is realized. In particular, the use of film strips as the front film and the back film saves the usage of the front film and the back film, and reduces the production cost of the battery string.

In some embodiments, the conveying part includes a set of support rollers, a driving device and a flexible conveyor belt, wherein: the driving end of the drive device is in transmission connection with the set of support rollers, and the drive device is used to drive the set of support rollers to rotate; the flexible conveyor belt includes a belt body and a flexible bearing layer, wherein the belt body is set on the supporting roller set, and the flexible bearing layer is laid on the conveying surface of the belt body.

In order to ensure that the ribbon assembly can be bonded to the battery sheet after being heated by the heating part, the heating part needs to be clamped on the battery sheet by a compression mechanism or a compression tool when heating the stacked ribbon group and battery string. However, due to the certain hardness of the film, when pressing the battery sheet, only the front film located above the battery sheet can be pressed tightly on the battery sheet, while the back film located below the battery sheet is difficult to adhere to the battery sheet. By setting a flexible bearing layer on the conveyor belt, the flexible bearing of the welding ribbon group and the battery sheet is realized. In this way, when the battery sheet is pressed, the flexible bearing layer is elastically deformed after being pressed, so that the back film under the battery sheet Pressed onto the back of the cell, ultimately improving soldering quality.

In some embodiments, the flexible bearing layer includes several flexible strips laid at intervals on the conveying surface of the belt; or, the flexible bearing layer is a whole flexible strip laid on the conveying surface of the belt.

The shaping of the flexible carrier layer is achieved by laying the flexible strip or the flexible strip on the conveying surface of the belt body.

In some embodiments, the width of the flexible bearing layer is greater than or equal to the width of the battery sheet and less than or equal to the width of the belt body, and the flexible bearing layer is made of silica gel or high temperature resistant sponge.

By setting the width dimension of the flexible bearing layer, the amount of flexible material is saved under the premise of ensuring the effective bearing of the battery sheet. Silicone or high-temperature-resistant sponge has good flexibility, and can produce a suitable amount of resilience after being pressed. In addition, these two materials have good high-temperature resistance.

In some embodiments, the heating part includes a mounting frame, a heating component, and an air blowing mechanism, wherein the heating component is installed on the mounting frame, and the heating component includes heating sheets arranged at intervals and heating rods for heating the heating sheets; the blowing mechanism Installed on the installation frame and above the heating components, the blowing mechanism is used to blow the heat emitted by the heating chips to the stacked battery chips and ribbon components.

Through the cooperation of the blowing mechanism of the heating component, the heating part can blow heat to the stacked battery sheet and ribbon assembly in a directional manner, thereby ensuring the heating effect of the heating section on the battery sheet and ribbon assembly.

In some embodiments, the heating part further includes a driving mechanism, the mounting frame is connected to a driving end of the driving mechanism, and the driving mechanism is used to drive the mounting frame to translate and/or lift.

By setting the driving mechanism, the translation and/or lifting control of the heating component and the blowing mechanism is realized, so that the heating component and the blowing mechanism can reach a predetermined heating position.

In some embodiments, the mounting frame is reversibly connected to the driving end of the driving mechanism via a rotating connection piece.

The installation frame can be reversibly connected to the driving end of the drive mechanism through the rotating connector, so that the installation frame can switch between the working position and the avoidance position. When the installation frame is turned down to the working position, the heating components and the blowing air The mechanism cooperates to implement the heating of the battery sheet and the ribbon assembly; and when the installation frame is turned down to the avoidance position, the avoidance of other operating components is realized.

The present invention also provides a battery string welding method, which includes:

Attaching the front film and the back film at intervals on the front and back of the multiple parallel ribbons;

Cutting the ribbon attached with the front film and the back film into ribbon assemblies, each ribbon assembly comprising a ribbon, a front film attached to the front portion of the ribbon, and a rear section attached to the ribbon part of the backside film;

Stack the ribbon assembly and the battery slices, wherein the i-th battery slice is stacked on the upper side of the rear section of the i-th group of ribbon assemblies, and the front section of the i+1th ribbon assembly is stacked on the i-th On a cell, i is any natural number greater than 0;

The stacked battery sheets and ribbon assemblies are crimped together to form a battery string.

In some embodiments, attaching the front film and the back film at intervals on the front and back of the multiple parallel ribbons includes: pulling out multiple parallel ribbons; The section of the front film is adsorbed and the jth section of the front film is cut off, and the jth section of the front film to be attached is attached to the front of the pulled out welding ribbon at the front film adsorption station; The back film of the j segment is adsorbed and the j segment of the back film is cut off, and the j segment of the back film adsorbed is attached to the back of the pulled-out welding ribbon at the back film adsorption station, and the front film attached to the welding band and the back film interval distribution, j is a natural number greater than 0.

The battery string welding method provided by the invention realizes the automatic stringing of the battery strings that need welding ribbons on both sides. In particular, the present invention automatically attaches the front film and the back film to the ribbon group, and the ribbon group finally connects the cells in series through the front film and the back film attached thereto, thereby improving the welding ribbon The connection strength between the group and the cell.

The present invention also provides another battery string welding method, which includes: attaching a front film to the front faces of a plurality of parallel welding ribbons; The assembly includes a welding ribbon and a front film attached to the welding ribbon; the welding ribbon assembly and the battery sheet are stacked, wherein the second half of the i-th group of welding ribbon assembly is stacked on the i-th battery sheet, and the i-th The first half of the ribbon assembly is stacked on the i-1th cell, wherein i is any natural number greater than 1 and less than N+1.

The battery string welding method provided by the invention realizes the automatic stringing of the battery strings (IBC battery strings) that only need welding ribbons on one side. In particular, the present invention automatically attaches the front film and the back film to the ribbon group, and the ribbon group finally connects the cells in series through the front film and the back film attached thereto, thereby improving the welding ribbon The connection strength between the group and the cell.

Description of drawings

Fig. 1 is a schematic structural view of a stringer in an embodiment of the present invention;

Fig. 2 is the structural representation of the stringer of the embodiment of the present invention under another viewing angle;

Fig. 3 is a structural schematic view of the film tape feeding part, film tape attaching part and film tape pulling part in an embodiment of the present invention;

Fig. 4 is a structural schematic diagram of the film tape feeding part, film tape attaching part and film tape pulling part in another viewing angle in the embodiment of the present invention;

Figure 5 is a partially enlarged view of Figure 4;

Fig. 6 is a structural schematic diagram of the front film feeding mechanism in the embodiment of the present invention;

Fig. 7 is a schematic structural view of the conveying part and the heating part in the embodiment of the present invention;

Fig. 8 is a partial structural schematic diagram of the heating part in the embodiment of the present invention;

Fig. 9 is a structural schematic diagram of a ribbon processing mechanism in an embodiment of the present invention;

Fig. 10 is a partially enlarged view of area A in Fig. 9;

Fig. 11 is a partially enlarged view of area B in Fig. 9;

Fig. 12 is a schematic structural diagram of an IBC battery string;

Figures 1 to 12 include:

Film belt feeding unit 1: front film feeding mechanism 11, back film feeding mechanism 12;

Film tape attaching part 2:

Front film sticking mechanism 21: front film adsorption assembly 211, front film heating assembly 212, front film cutting assembly 213, front film guide plate 2131, front film cutter 2132;

Back film sticking mechanism 22: back film adsorption component 221, back film heating component 222, back film cutting component 223, back film guide plate 2231, back film cutter 2232;

Film belt traction part 3:

Front film traction mechanism 31;

Back film traction mechanism 32;

Conveyor 4:

Support roller set 41;

drive means 42;

Flexible conveyor belt 43;

Heating part 5:

drive mechanism 51;

mounting frame 52;

Heating component 53;

Blowing mechanism 54;

Front film feeding mechanism 6:

Bottom plate 61 , sliding bracket 62 , bearing plate 63 , pressing drive assembly 64 , pressing plate 65 , and feeding drive assembly 66 .

Ribbon processing mechanism 7:

The first welding ribbon clamping assembly 71, the second welding ribbon clamping assembly 72, the first welding ribbon cutter 73, the second welding ribbon cutter 74, the dislocation slide rail 75, the first welding ribbon set spacing slide rail 76, The second ribbon set is spaced from the slide rail 77 .

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the existing stringing method of cells, in the process of stacking cells and ribbons, the cells and ribbons are bonded together by dispensing glue to the cells, but the adhesion effect of cells and ribbons is poor, reducing The production quality of the battery string is improved.

In order to solve this problem, the present invention provides a stringer, which can automatically attach the film strips to the welding strips, and weld the battery sheets into strings by using the welding strips attached with the film strips. Thereby, the connection strength between the ribbon group and the battery sheet is improved.

The following will illustrate the stringer of the present invention through two embodiments.

first embodiment

The stringer provided in this embodiment is used for automatic stringing of cells with grid lines on both sides.

As shown in Figures 1 and 2, the stringer of this embodiment includes a ribbon feeder, a ribbon feeder 1, a ribbon tractor 3, a ribbon attacher 2, a ribbon cutter, and a ribbon The traction part, the cell feeding part, the conveying part 4 and the heating part 5, in which:

The ribbon pulling part is configured to pull a plurality of parallel ribbons supplied by the ribbon supply part, so that the ribbons pass through the tape attaching part 2 and the ribbon cutting part in sequence.

The film tape pulling unit is configured to pull the front film and the back film supplied by the film tape supply unit 1 , so that a predetermined length of the front film to be attached and a predetermined length of the back film to be attached enter the film tape attaching unit 2 .

The film tape attaching part 2 is used to attach the front film to be attached to the front of the welding tape, and attach the back film to be attached to the back of the welding tape, and ensure that the front film and the back film attached to the welding tape are interval distribution.

The ribbon cutting part is used to cut the ribbon attached with the front film and the back film into ribbon assemblies, wherein each ribbon assembly includes the ribbon, the front film attached to the front part of the ribbon, and the attached ribbon. The backside film on the back section of the ribbon.

The ribbon pulling part is also used to place the ribbon assembly on the conveying part 4 .

The battery sheet feeding part is used to place the battery sheet on the conveying part 4, wherein the i-th battery sheet is stacked on the rear part of the i-th group of ribbon assemblies, and the front section of the i+1-th group of ribbon assemblies is stacked On the i-th cell, i is any natural number greater than 0.

The heating part is used for heating the stacked battery sheets and ribbon assemblies to form a battery string.

As shown in FIGS. 3 to 4 , the film tape attaching unit 2 in this embodiment includes a front film sticking mechanism 21 and a back film sticking mechanism 22 , and the welding tape passes through the front film sticking mechanism 21 and the back film sticking mechanism 22 . The film tape pulling unit 3 includes a front film pulling mechanism 31 and a back film pulling mechanism 32 . in:

The front film traction mechanism 31 is configured to pull the front film supplied by the film belt feeder 1, so that the front film to be attached enters the front film sticking mechanism 21, and the front film sticking mechanism 21 is configured to suck and cut off the sticking film to be attached. The front side film, and attach the cut-out front side film to be attached to the front side of the soldering tape.

The back film traction mechanism 32 is configured to pull the back film supplied by the film belt supply unit 1, so that the back film to be attached enters the back film sticking mechanism 22, and the back film sticking mechanism 22 is configured to suck and cut off the back film to be attached. back film, and attach the cut back film to be attached to the back of the ribbon.

It should be noted that the front and back sides of the welding ribbon described in this application are only used to indicate the orientation of the front film and the back film relative to the welding ribbon, and do not refer to the actual surface of the welding ribbon. In practical applications, the welding ribbon may be a circular welding ribbon, a triangular welding ribbon, or a special-shaped welding ribbon formed alternately of circular welding ribbon sections and triangular welding ribbon sections.

As shown in Figure 5, optionally, the front film sticking mechanism 21 includes a front film adsorption assembly 211, a front film heating assembly 212 and a front film cutting assembly 213, wherein the front film adsorption assembly 211 is located above the front film heating assembly 212 , the front film cutting assembly 213 is located in front of the front film adsorption assembly 211, and the front film A to be attached passes through the front film cutting assembly 213 and enters between the front film adsorption assembly 211 and the front film heating assembly 212.

The front film adsorption assembly 211 is configured to absorb the front film A to be attached, and the front film cutting assembly 213 is configured to cut off the front film A to be attached absorbed by the front film adsorption assembly 211 . The front film adsorption assembly 211 is also configured to press the front film A to be attached to the front of the welding ribbon C, and the front film heating assembly 212 is used to heat the front film A to be attached, so that the front film A to be attached is attached to the Front side of the ribbon.

Similarly, the back film sticking mechanism 22 includes a back film adsorption assembly 221, a back film heating assembly 222 and a back film cutting assembly 223, wherein the back film adsorption assembly 221 is located below the back film heating assembly 222, and the back film cutting assembly 223 Located in front of the back film adsorption assembly 221, the back film B to be attached passes through the back film cutting assembly 223 and enters between the back film adsorption assembly 221 and the back film heating assembly 222.

The back film adsorption assembly 221 is configured to absorb the back film B to be attached, the back film cutting assembly 223 is configured to cut off the back film B to be attached sucked by the back film adsorption assembly 221, and the back film adsorption assembly 221 is also configured In order to press the back film to be attached to the back of the ribbon C, the back film heating component 222 is used to heat the back film B to be attached, so that the back film B to be attached is attached to the back of the ribbon C.

As shown in Figure 5, optionally, the front film pulling mechanism 31 pulls the predetermined length of the front film A to be attached to the front film adsorption assembly in the same direction as the pulling direction of the welding ribbon C (the direction of the arrow in the figure). 211 and the front film heating assembly 212. However, the back film pulling mechanism 32 pulls a predetermined length of the back film to be attached between the back film adsorption assembly 221 and the back film heating assembly 222 in a direction opposite to the pulling direction of the welding ribbon C.

Of course, the front film pulling mechanism 31 can also pull a predetermined length of the front film A to be attached between the front film adsorption assembly 211 and the front film heating assembly 212 in a direction opposite to the pulling direction of the welding ribbon C. However, the back film pulling mechanism 32 pulls the predetermined length of the back film to be attached between the back film adsorption assembly 221 and the back film heating assembly 222 along the same direction as the pulling direction of the welding ribbon C. Alternatively, both the front film pulling mechanism 31 and the back film pulling mechanism 32 pull the predetermined length of the front film A to be attached and the predetermined length of the back film to be attached along the same or opposite direction to the pulling direction of the welding ribbon C.

Optionally, the front film adsorption assembly 211 includes a first drive mechanism and a front film adsorption plate, wherein the front film adsorption plate is connected to the driving end of the first drive mechanism, and the front film adsorption plate is used to absorb the front film to be attached. A driving mechanism is used to drive the front film adsorption plate to move toward or away from the welding ribbon C. When the first driving mechanism drives the front film adsorption plate to move towards the welding ribbon C, the front film A to be attached adsorbed thereon can be stacked on the front surface of the welding ribbon C.

Similarly, the back film suction assembly 221 includes a second drive mechanism and a back film suction plate, wherein the back film suction plate is connected to the driving end of the second drive mechanism, and the back film suction plate is used to absorb the back film to be attached. The second driving mechanism is used to drive the back film adsorption plate to move toward or away from the welding ribbon C. When the second driving mechanism drives the back film adsorption plate to move towards the welding ribbon C, the back film B to be attached can be superimposed on the back surface of the welding ribbon C.

Optionally, the front film heating assembly 212 includes a front film heating plate. After the front film adsorption assembly 211 stacks the adsorbed front film A to be attached on the front of the welding ribbon C, the front film heating plate heats the front film A to be attached. Mask A, so that the surface film A to be attached softens and releases the adhesive force, and is finally attached to the front surface of the welding tape C. In addition, a plurality of first ribbon guide grooves extending along the pulling direction of the ribbon C are provided on the side surface of the front film heating plate facing the ribbon C, and each first ribbon guide groove is used to implement a welding belt guide.

Similarly, the back film heating assembly 222 includes a back film heating plate. After the back film adsorption assembly 222 stacks the adsorbed back film B to be attached on the back of the welding ribbon C, the back film heating plate heats the back film to be attached. B, making the back film B to be attached soften and release the adhesive force, and finally attached to the back side of the soldering tape C. In addition, a plurality of second ribbon guide grooves extending along the pulling direction of the ribbon C are provided on the side surface of the heating plate of the back film facing the ribbon C, and each second ribbon guide groove is used to implement a welding belt guide.

As shown in Figure 5, optionally, the front film cutting assembly 213 includes a front film guide plate 2131 and a front film cutter 2132 positioned above the front film guide plate 2131, wherein the front film guide plate 2131 is provided with The front film guide groove extending in the direction of traction, the front film to be attached enters between the front film adsorption assembly 211 and the front film heating assembly 212 under the guidance of the front film guide groove, and when the front film cutter 2132 descends, it meets the front film guide plate The ends of 2131 are butted together to cut off the front film to be attached.

Similarly, the back film cutting assembly 223 includes a back film guide plate 2231 and a back film cutter 2232 positioned above the back film guide plate 2231, wherein the back film guide plate 2231 is provided with a back film that extends along the pulling direction of the back film Guide groove, the back film to be attached enters between the back film adsorption component 221 and the back film heating component 222 under the guidance of the back film guide groove, and the back film cutter 2232 is aligned with the end of the back film guide plate 2231 when it descends To cut off the back film to be attached.

Optionally, the stringer in this embodiment also includes a front film feeding mechanism located in front of the front film cutting assembly 213 , and a back film feeding mechanism located in front of the back film cutting assembly 223 . in:

The front film feeding mechanism is used to clamp the front film after the front film A to be attached when the front film cutting assembly 213 cuts the front film A to be attached, and cuts the front film A to be attached by the front film cutting assembly 213. After the front film A, the clamped front film is pushed toward the front film pulling mechanism 31 .

It can be seen that by setting the front film feeding mechanism, when the front film cutting assembly 213 cuts off the current front film to be attached, the front film feeding mechanism can realize the clamping and positioning of the front film on the rear side, preventing the current front film to be attached. When the attached front film is cut off, the front film on the rear side retracts or falls. After the current front film to be attached is cut off, the front film feeding mechanism can push the clamped front film toward the front film pulling mechanism 31, so that the front film pulling mechanism 31 can clamp the next section from the front film feeding mechanism The front film to be attached, and the next section of the front film to be attached is pulled between the front film adsorption component 211 and the front film heating component 212 .

The back film feeding mechanism is used to cut off the back film B to be attached at the back film cutting assembly 223, clamp the back film to be attached after the back film B, and cut off the back film B to be attached at the back film cutting assembly 223. After the facial mask, the clamped back film is pushed toward the back film traction mechanism 32.

It can be seen that through the back film feeding mechanism, when the back film cutting assembly 223 cuts off the current back film to be attached, the back film feeding mechanism can realize the clamping and positioning of the back film on the rear side, preventing the current back film to be pasted. When the attached back film is cut off, the back film on the rear side retracts or falls. After the current back film to be attached is cut off, the back film feeding mechanism can push the clamped back film toward the back film pulling mechanism 32, so that the back film pulling mechanism 32 can clamp the next section from the back film feeding mechanism The back film is to be attached, and the next section of the back film to be attached is pulled between the back film adsorption component 221 and the back film heating component 222 .

Optionally, the structure of the front film feed mechanism and the back film feed mechanism in this embodiment is the same, taking the front film feed mechanism as an example, as shown in Figure 6, the front film feed mechanism 6 includes a bottom plate 61, a slide Bracket 62 , bearing plate 63 , pressing drive assembly 64 , pressing plate 65 and feeding drive assembly 66 .

Wherein the bottom plate 61 is provided with a slide rail extending along the pulling direction of the front film.

The slide of slide support 62 is connected on the slide rail.

The bearing plate 63 is fixedly connected to the upper end of the sliding bracket 62 .

The pressing drive assembly 64 is arranged on the sliding bracket 62 , the pressing plate 65 is connected to the driving end of the pressing driving assembly 64 and is located below the bearing plate 63 , and the pressing driving assembly 64 is used to drive the pressing plate 65 up and down.

The feeding drive assembly 66 is arranged on the bottom plate 61 , the driving end of the feeding driving assembly 66 is connected to the sliding bracket 62 , and the feeding driving assembly 66 is used to drive the sliding bracket 62 to slide along the slide rail.

In order to ensure that the ribbon assembly can be bonded to the battery sheet after being heated by the heating part 5, when the heating part 5 heats the stacked ribbon group and battery string, it needs to be clamped on the battery by a pressing mechanism or a pressing tool. a. However, due to the certain hardness of the film, when pressing the battery sheet, only the front film located above the battery sheet can be pressed tightly on the battery sheet, while the back film located below the battery sheet is difficult to adhere to the battery sheet.

In order to solve this problem, the present embodiment improves the conveying part 4. As shown in FIG. The roller set 41 is connected by transmission, and the driving device 43 is used to drive the supporting roller set 41 to rotate, thereby driving the flexible conveyor belt 43 to convey. The flexible conveyor belt 43 includes a belt body 431 and a flexible bearing layer 432 , wherein the belt body 431 is set on the support roller set 41 , and the flexible bearing layer 432 is laid on the conveying surface of the belt body 431 .

By arranging a flexible bearing layer on the belt body of the conveyor belt, the flexible bearing of the welding belt group and the battery sheet is realized. In this way, when the battery sheet is pressed from above, the flexible bearing layer 432 undergoes elastic deformation after being pressed, and the elastic force generated by it presses the back film under the battery sheet to the back surface of the battery sheet, thereby ensuring welding quality. Optionally, the flexible bearing layer 432 includes several flexible strips laid at intervals on the conveying surface of the belt body; or, the flexible bearing layer 432 is a whole flexible strip laid on the conveying surface of the belt body 431 .

Optionally, the width of the flexible bearing layer 432 is greater than or equal to the width of the battery sheet and less than or equal to the width of the belt 431 , and the flexible bearing layer 432 is made of silica gel or high temperature resistant sponge.

As shown in Figure 7, optionally, the heating part 5 includes an installation frame 51, a heating component 52 and an air blowing mechanism 53, wherein the heating component 52 is installed on the installation frame 51, and the heating component 52 includes heating sheets arranged at intervals and Heating rod for heating the heating sheet. The air blowing mechanism 53 is installed on the installation frame 51 and located above the heating assembly 52 , and the air blowing mechanism 53 is used to blow the heat dissipated by the heating sheet to the stacked battery sheet and ribbon assembly.

Optionally, the heating part 5 also includes a drive mechanism 54, the installation frame 51 is connected to the drive end of the drive mechanism 54, and the drive mechanism 54 is used to drive the installation frame 51 to translate and/or lift, so that the heating component 52 and the blowing mechanism 53 can be moved to a predetermined heating position.

Optionally, the installation frame 51 is reversibly connected to the driving end of the drive mechanism 51 via hinges, rotating shafts and other rotating connectors, so that the installation frame 51 can be turned over and switched between the working position and the avoidance position. When the installation frame 51 is turned down to the working position, the heating assembly 52 and the air blowing mechanism 53 cooperate to heat the battery sheet and the ribbon assembly. And when the installation frame 51 is turned down to the avoidance position, the avoidance of other operating components is realized.

As mentioned above, the ribbon pulling mechanism pulls out multiple parallel ribbons. In order to realize the feeding of multiple parallel ribbons, optionally, the stringer in this embodiment further includes a ribbon feeding mechanism, and the ribbon feeding mechanism includes a plurality of ribbon rolls wound with ribbons, Each ribbon reel pays out one ribbon. The ribbon pulling mechanism pulls out a plurality of parallel welding ribbons from a plurality of ribbon coils at the same time. A clamping jaw is used for clamping and pulling the welding ribbon released from the corresponding welding ribbon roll.

In order to save diaphragm resources and reduce the production cost of the battery string, optionally, this embodiment uses strip-shaped film strips to implement bonding between the welding ribbon and the battery sheets.

In order to achieve this goal, as shown in Figure 1 and Figure 2, optionally, in this embodiment, the film tape feeding mechanism 1 includes a front film feeding mechanism 11 and a back film feeding mechanism 12, wherein: the front film feeding mechanism The mechanism 11 is configured to supply a plurality of front-side films, and each front-side film is correspondingly attached to a soldering tape. Of course, if the distance between the welding strips is small, each front film can also be attached to two or more welding strips correspondingly. Likewise, the back film feeding mechanism 12 is configured to supply a plurality of back films, and each back film is correspondingly attached to a soldering tape. Certainly, if the distance between the welding strips is relatively small, each back film can also be correspondingly attached to two or more welding strips.

second embodiment

The stringer provided in this embodiment is used for automatic stringing of battery sheets with grid lines on only one side, that is, for producing IBC battery strings.

The structure and working process of the stringer in this embodiment and the stringer in the first embodiment are basically the same, therefore, the following will focus on the differences between this embodiment and the first embodiment, and the rest are the same For the part, you can refer to the corresponding content in the first embodiment.

For the convenience of description, when introducing the structure and working process of the stringer of this embodiment, on the premise of no contradiction, the relevant drawings and reference numerals in the first embodiment are used.

As shown in Figure 1, the stringer of the present embodiment includes a ribbon feeder, a ribbon feeder 1, a ribbon puller 3, a ribbon sticker 2, a ribbon cutter, a ribbon puller, Ribbon processing part, cell feeding part, conveying part 4 and heating part 5, in which:

The ribbon pulling part is configured to pull a plurality of parallel ribbons supplied by the ribbon supply part, so that the ribbons pass through the film tape attaching part 2 and the ribbon cutting part in sequence, and transfer the ribbons to the ribbon processing part .

The film tape pulling unit is configured to pull the front film supplied by the film tape supply unit 1 , so that a predetermined length of the front film to be attached enters the film tape attaching unit 2 .

The film tape attaching part 2 is used to attach the front film to be attached to the front of the welding tape;

The ribbon cutting section is used to cut the ribbon attached with the front film into ribbon segments, and the ribbon processing section is used to cut the ribbon segments into ribbon assemblies and perform dislocation and spacing processing on the ribbon assemblies. Wherein, each ribbon assembly includes a ribbon and a front film attached to the ribbon.

The welding ribbon processing part is also used to place the divided welding ribbon assembly on the conveying part 4 .

The battery sheet feeding part is used to place the battery sheet on the conveying part 4, wherein the second half of the i-th group of ribbon assemblies is stacked on the i-th battery sheet, and the first half of the i-th group of ribbon assemblies is stacked on the i-th - On 1 cell, where i is any natural number greater than 1 and less than N+1;

The heating part 5 is used for heating the stacked battery sheets and ribbon assembly to form a battery string.

It can be seen that, in this embodiment, the ribbon cutting unit performs the first cutting on the ribbon with the front film attached, so as to obtain a longer ribbon segment with multiple front films attached at intervals. Next, the ribbon section is cut into ribbon assemblies by the ribbon processing mechanism. In the first embodiment, the ribbon cutting unit directly cuts the ribbon with the front film and the back membrane into ribbon assemblies.

In addition, the ribbon processing mechanism also completes the dislocation and spacing processing of the ribbon assembly. In this way, the ribbon processing mechanism can lay all the ribbon assemblies on the already laid battery sheets at one time, thereby greatly improving the production efficiency of the IBC battery string.

In this embodiment, the film tape only needs to be pasted on one surface of the solder tape. Therefore, the film tape sticking unit in this embodiment only includes the front film sticking mechanism 21 or the back film sticking mechanism 22 . The welding ribbon passes through the front film pasting mechanism 21 or the back film pasting mechanism 22 under the traction of the welding strip pulling mechanism.

For the specific structure of the front film traction and film application group 21 or the back film film application mechanism 22 in this embodiment, as well as the specific process of film application, please refer to the relevant description in the above-mentioned first embodiment, which will not be repeated in this specification.

Correspondingly, in this embodiment, the film tape feeding unit 1 only includes the front film feeding mechanism 11 or the back film feeding mechanism 12 , and the film tape pulling unit 3 only includes the front film pulling mechanism 31 or the back film pulling mechanism 32 . In addition, in this embodiment, only one of the front film pushing mechanism and the back film feeding mechanism is required. Likewise, for the specific structures and working processes of the above-mentioned components, please also refer to the relevant description in the above-mentioned first embodiment, which will not be repeated in this specification.

As shown in Figure 12, the method of stringing the IBC battery strings is as follows: Lay N (four in the figure) battery slices 200 with their backs facing up in sequence, and make the electrode rows of adjacent battery slices on the same straight line opposite in polarity. Use N+1 (five in the figure) ribbon groups to weld N cells 200 into a string, wherein: the first ribbon group (the first, third and fifth ribbon groups in the figure) , The second ribbon group (the 2nd and 4th ribbon groups in the figure) is laid alternately.

In the traditional IBC battery string welding process, in order to realize the dislocation laying of the first ribbon group and the second ribbon group, it is necessary to alternately pull and obtain the first ribbon group and the second ribbon group, and then place the first ribbon The ribbon group and the second ribbon group are alternately laid on the battery sheet. Its ribbon processing efficiency is low, which ultimately affects the production efficiency of the battery string.

However, the stringer in this embodiment is provided with a ribbon processing unit, which can displace and divide the ribbon components. Specifically, as shown in FIGS. 9 to 11 , the ribbon processing unit 7 in this embodiment includes several first ribbon clamping assemblies 71 arranged along the first horizontal direction (the X-axis direction in the figure). , a plurality of second ribbon clamping assemblies 72, a plurality of first ribbon cutters 73, a plurality of second ribbon cutters 74, and a ribbon transport mechanism.

The ribbon pulling part pulls the plurality of ribbon segments cut and obtained by the ribbon cutting part to the ribbon processing part along the first horizontal direction.

A plurality of first welding ribbon clamping assemblies 71 cooperate to clamp all the odd-numbered welding ribbon sections among the plurality of welding ribbon sections, and a first welding ribbon is arranged between each adjacent first welding ribbon clamping assembly 71 The cutters 73, each of the first ribbon cutters 73 are used to cut off all the odd-numbered ribbon segments at corresponding positions, so as to obtain several sets of first ribbon assemblies.

A plurality of second welding ribbon clamping assemblies 72 cooperate to clamp all the even-numbered welding ribbon segments in the plurality of welding ribbon sections, and a second welding ribbon is arranged between each adjacent second welding ribbon clamping assembly 72 The cutters 74, each of the second ribbon cutters 74 are used to cut off all the even-numbered ribbon segments at corresponding positions, so as to obtain several groups of second ribbon assemblies.

Before all the odd-numbered welding ribbon segments are cut off, several first welding ribbon clamping assemblies 71 and several second welding ribbon clamping assemblies 72 relatively translate in the first horizontal direction, so that all odd-numbered welding ribbon sections The ribbon segment is staggered by a predetermined distance from all even-numbered solder ribbon segments in the first horizontal direction.

After all the odd-numbered welding ribbon sections are cut off, each first welding ribbon clamping assembly 71 respectively clamps a group of corresponding first welding ribbon assemblies, and each first welding ribbon clamping assembly 71 is also configured to Separated in the horizontal direction, to implement the division of each group of first ribbon components.

After all the even-numbered welding ribbon segments are cut off, each second welding ribbon clamping assembly 72 respectively clamps a group of corresponding second welding ribbon assemblies, and each second welding ribbon clamping assembly 72 is also configured to Separated in the horizontal direction, to implement the division of each group of second welding ribbon components.

Finally, the ribbon conveying mechanism transports and stacks all the first ribbon assemblies and second ribbon assemblies that have been dislocated and spaced at one time on the battery sheets that have been placed on the conveying part 4 .

Optionally, both the first welding ribbon clamping assembly 71 and the second welding ribbon clamping assembly 72 include a plurality of clamping jaws arranged side by side along the second horizontal direction, and each clamping jaw is used to clamp a ribbon. Wherein, the second horizontal direction is perpendicular to the first horizontal direction.

As shown in Figures 9 to 11, optionally, the welding ribbon processing mechanism also includes a base, a dislocation slide rail 75 extending along the first horizontal direction, a distance slide rail 76 for the first welding ribbon group and a second welding ribbon group Distance slide rail 77, wherein:

The dislocation slide rail 75 is arranged on the base, and the first welding ribbon group spacing slide 76 is slidably connected on the dislocation slide rail 75. The first welding ribbon clamping assembly 71 and the first welding ribbon cutter 73 are connected to the first welding ribbon assembly. The group is spaced on the slide rail 76.

The second welding ribbon set spacing slide rail 77 is arranged on the base, and the second welding ribbon clamping assembly 72 and the second welding ribbon cutter 74 are both connected to the second welding ribbon set spacing slide rail 77 .

Before all the odd-numbered welding ribbon sections are cut off, control the first welding ribbon group spacing slide rail 76 to slide along the dislocation slide rail 75, so that all the odd-numbered welding ribbon sections and all the even-numbered welding ribbon sections Staggered by a predetermined distance in the first horizontal direction.

After all the odd-numbered welding ribbons are cut off, control each first welding ribbon clamping assembly 71 and each first welding ribbon cutter 73 to slide apart along the first welding ribbon group distance slide rail 76, thereby separating each group of the first welding ribbon A spacing between ribbon assemblies is adjusted to a predetermined spacing.

After all the even-numbered welding ribbons are cut off, control each second welding ribbon clamping assembly 72 and each second welding ribbon cutting knife 74 to slide apart along the second welding ribbon group spacing slide rail 77, thereby separating each group of the first welding ribbon The spacing between the two welding strip components is adjusted to a predetermined spacing.

The present invention also provides a battery string welding method, the battery string welding method can automatically attach the film tape to the welding tape, and use the film tape attached to the welding tape group to weld the battery pieces into a string, thereby improving The connection strength between the ribbon group and the battery sheet.

The battery string welding method of the present invention will be exemplarily described below through two embodiments.

third embodiment

The battery string welding method provided in this embodiment is used for automatic stringing of battery sheets with grid lines on both sides.

The battery string welding method provided in this embodiment can be realized by the stringer welding machine and the supporting control program of the aforementioned first embodiment.

The battery string welding method provided in this embodiment includes the following steps:

S100, attaching a front film and a back film at intervals on the front and back of a plurality of parallel welding ribbons.

S200. Cutting the welding ribbon attached with the front film and the back film into a welding ribbon assembly, each welding ribbon assembly includes a welding ribbon, a front film attached to the front section of the welding ribbon, and a rear section attached to the welding ribbon part of the backside film.

S300. Stack the ribbon assembly and the battery slices, wherein the i-th battery slice is stacked on the upper side of the rear section of the i-th group of ribbon assemblies, and the front section of the i+1th set of ribbon assemblies is stacked on On the i-th cell, i is any natural number greater than 0.

S400, crimping the stacked battery sheets and ribbon assemblies together to form a battery string.

Optionally, step S100 includes the following sub-steps:

S101, pulling out a plurality of parallel welding ribbons.

S102. Adsorb the jth segment of the front film to be attached at the front film adsorption station and cut off the jth segment of the front film, and attach the jth segment of the adsorbed film to the front side of the pulled-out welding ribbon at the front film adsorption station. Section of the front film.

S103. At the back film adsorption station, absorb the jth section of the back film to be attached and cut off the j section of the back film, and attach the jth section of the back film to the back of the pulled-out solder ribbon at the back film adsorption station. Segment back film, the front film and back film attached to the welding strip are distributed at intervals, and j is a natural number greater than 0.

Wherein, steps S102 and S103 may be executed sequentially, or may be executed synchronously.

Fourth embodiment

The battery string welding method provided in this embodiment is used to implement automatic stringing of battery sheets with grid lines on only one side, that is, to produce IBC battery strings.

The battery string welding method provided in this embodiment can be realized by the stringer welding machine and the supporting control program of the second embodiment mentioned above.

The battery string welding method provided in this embodiment includes the following steps:

S100', attaching a front film to the front faces of a plurality of parallel soldering strips.

S200', cutting the welding ribbon attached with the front film into a welding ribbon assembly, each welding ribbon assembly includes a welding ribbon and a front film attached to the welding ribbon.

S300', stacking the ribbon assembly and the battery sheet, wherein the second half of the i-th ribbon group is stacked on the i-th battery sheet, and the first half of the i-th ribbon group is stacked on the i-1th solar cell cells, where i is any natural number greater than 1 and less than N+1.

The foregoing has described the invention in sufficient detail with some particularity. Those skilled in the art should understand that the descriptions in the embodiments are only exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the protection scope of the present invention. The protection scope of the present invention is defined by the claims rather than the above description in the embodiments.

Claims (16)

1. The utility model provides a stringer, its characterized in that, stringer is including welding area feed portion, membrane area traction portion, the attached portion in membrane area, welding area cutting part, welding area traction portion, battery piece material loading portion, conveying part and heating portion, wherein:

the welding strip drawing part is configured to draw the plurality of parallel welding strips supplied by the welding strip supply part so that the welding strips sequentially pass through the film strip attaching part and the welding strip cutting part;

the film tape traction part is configured to pull the front surface film and the back surface film supplied by the film tape supply part, so that the front surface film to be attached with a preset length and the back surface film to be attached with a preset length enter the film tape attachment part; the film strip attaching part is used for attaching the front film to be attached to the front surface of the welding strip and attaching the back film to be attached to the back surface of the welding strip, and the front film and the back film attached to the welding strip are distributed at intervals;

the welding strip cutting part is used for cutting a welding strip attached with a front surface film and a back surface film into welding strip components, and the welding strip traction part is also used for placing the welding strip components on the conveying part, wherein each welding strip component comprises a welding strip, a front surface film attached to the front section part of the welding strip and a back surface film attached to the back section part of the welding strip;

the battery piece feeding part is used for placing battery pieces on the conveying part; the ith battery piece is stacked on the rear section part of the ith group of welding strip assemblies, the front section part of the (i + 1) th group of welding strip assemblies is stacked on the ith battery piece, and i is any natural number greater than 0;

the heating part is used for heating the stacked battery plates and the welding strip assembly to form a battery string.

2. The utility model provides a stringer, its characterized in that, stringer is including welding area feed portion, membrane area traction portion, the attached portion in membrane area, welding area cutting part, welding area traction portion, welding area processing portion, battery piece material loading portion, conveying part and heating portion, wherein:

the welding strip drawing part is configured to draw a plurality of parallel welding strips supplied by the welding strip supply part, so that the welding strips sequentially pass through the film strip attaching part and the welding strip cutting part, and transfer the welding strips to a welding strip processing part;

the film tape traction part is configured to pull the front face film supplied by the film tape supply part so that a front face film to be attached with a preset length is inserted into the film tape attaching part; the film strip attaching part is used for attaching the front film to be attached to the front surface of the welding strip;

the welding strip cutting part is used for cutting a welding strip attached with a front surface film into welding strip sections, the welding strip processing part is used for cutting the welding strip sections into welding strip components, carrying out dislocation and separation processing on the welding strip components, and placing the welding strip components subjected to dislocation and separation processing on the conveying part, wherein each welding strip component comprises a welding strip and a front surface film attached to the welding strip;

the battery piece feeding part is used for placing battery pieces on the conveying part; wherein, the back half section of the ith group of welding strip assemblies is stacked on the ith battery piece, and the front half section of the ith group of welding strip assemblies is stacked on the (i-1) th battery piece, wherein i is any natural number more than 1 and less than N + 1;

the heating part is used for heating the stacked battery plates and the welding strip assembly to form a battery string.

3. The stringer according to claim 1 or 2, wherein:

the film strip attaching part comprises a front film attaching mechanism and/or a back film attaching mechanism, and the welding strip penetrates through the front film attaching mechanism and/or the back film attaching mechanism;

the membrane area traction part comprises a front membrane traction mechanism and a back membrane traction mechanism, wherein:

the front film traction mechanism is configured to pull the front film supplied by the film belt supply part so that the front film to be attached enters the front film attaching mechanism, and the front film attaching mechanism is configured to suck and cut the front film to be attached and attach the cut front film to be attached to the front surface of the welding belt;

the back surface film traction mechanism is configured to pull the back surface film supplied by the film tape supply part so that the back surface film to be attached enters the back surface film attaching mechanism, and the back surface film attaching mechanism is configured to suck and cut the back surface film to be attached and attach the cut back surface film to be attached to the back surface of the solder tape.

4. The stringer according to claim 1 or 2, wherein:

the front film sticking mechanism comprises a front film adsorption component, a front film heating component and a front film cutting component, wherein the front film adsorption component is positioned above the front film heating component, the front film cutting component is positioned in the front of the front film adsorption component, and the front film to be stuck passes through the front film cutting component and then enters between the front film adsorption component and the front film heating component;

the front film adsorption component is configured to adsorb the front film to be attached, the front film cutting component is configured to cut off the front film to be attached adsorbed by the front film adsorption component, the front film adsorption component is further configured to press the front film to be attached to the front side of the welding strip, and the front film heating component is used for heating the front film to be attached so that the front film to be attached is attached to the front side of the welding strip;

the back film sticking mechanism comprises a back film adsorption assembly, a back film heating assembly and a back film cutting assembly, wherein the back film adsorption assembly is positioned below the back film heating assembly, the back film cutting assembly is positioned in the front of the back film adsorption assembly, and the back film to be attached passes through the back film cutting assembly and then enters between the back film adsorption assembly and the back film heating assembly;

the back surface film adsorption component is configured to adsorb the back surface film to be attached, the back surface film cutting component is configured to cut off the back surface film to be attached, the back surface film adsorption component is further configured to press the back surface film to be attached against the back surface of the welding strip, and the back surface film heating component is used for heating the back surface film to be attached, so that the back surface film to be attached is attached on the back surface of the welding strip.

5. The stringer of claim 4, wherein: the stringer also comprises a front film feeding mechanism and a back film feeding mechanism;

the front film feeding mechanism is positioned in front of the front film cutting assembly and used for clamping the front film to be attached to the front film when the front film cutting assembly cuts the front film to be attached, and pushing the clamped front film towards the front film traction mechanism after the front film cutting assembly cuts the front film to be attached;

the back face film feeding mechanism is located in the front of the back face film cutting assembly, and is used for clamping the back face film behind the to-be-attached back face film when the back face film cutting assembly cuts the to-be-attached back face film, and pushing the clamped back face film towards the back face film traction mechanism after the back face film cutting assembly cuts the to-be-attached back face film.

6. The stringer of claim 2, wherein: weld and take processing portion and include that the first solder strip centre gripping subassembly of a plurality of, a plurality of second solder strip centre gripping subassembly, the first solder strip cutter of a plurality of, a plurality of second solder strip cutter and solder strip transport mechanism of arranging along first horizontal direction, wherein:

the first welding strip clamping assemblies are matched with and clamp all odd welding strip sections in the plurality of welding strip sections, a first welding strip cutter is arranged between every two adjacent first welding strip clamping assemblies, and each first welding strip cutter is used for cutting off all odd welding strip sections at corresponding positions to obtain a plurality of groups of first welding strip assemblies;

the second welding strip clamping assemblies are matched with and clamp all even number welding strip sections in the plurality of welding strip sections, a second welding strip cutter is arranged between every two adjacent second welding strip clamping assemblies, and each second welding strip cutter is used for cutting off all even number welding strip sections at corresponding positions to obtain a plurality of groups of second welding strip assemblies;

before all the odd-numbered welding strip sections are cut off, the first welding strip clamping assemblies and the second welding strip clamping assemblies are relatively translated in the first horizontal direction, so that all the odd-numbered welding strip sections and all the even-numbered welding strip sections are staggered by a preset distance in the first horizontal direction;

after all odd-numbered solder strip sections are cut off, each first solder strip clamping assembly respectively clamps one group of corresponding first solder strip assemblies, and each first solder strip clamping assembly is further configured to be separated in a first horizontal direction so as to implement the separation of each group of first solder strip assemblies;

after all even number of welding strip sections are cut off, each second welding strip clamping assembly respectively clamps one group of corresponding second welding strip assemblies, and each second welding strip clamping assembly is further configured to be separated in the first horizontal direction so as to implement the separation of each group of second welding strip assemblies;

the welding strip carrying mechanism is used for placing the first welding strip assembly and the second welding strip assembly on the conveying part after dislocation and separation are completed.

7. The stringer according to claim 1 or 2, wherein:

the welding strip feeding part comprises a plurality of welding strip coils for winding welding strips, and each welding strip coil is used for paying out one welding strip;

the film strip feeding part comprises a front film feeding mechanism and a back film feeding mechanism, wherein the front film feeding mechanism is configured to supply a plurality of front films, and each front film corresponds to at least one welding strip; the back surface film feeding mechanism is configured to supply a plurality of front surface films, and each back surface film corresponds to at least one welding strip.

8. The stringer of claim 1, wherein said transport portion includes a set of support rollers, a drive device, and a flexible conveyor belt, wherein:

the driving end of the driving device is in transmission connection with the supporting roller set, and the driving device is used for driving the supporting roller set to rotate;

the flexible conveying belt comprises a belt body and a flexible bearing layer, wherein the belt body is sleeved on the supporting roller group, and the flexible bearing layer is laid on the conveying surface of the belt body.

9. The stringer of claim 8 wherein said flexible carrier layer comprises a plurality of flexible strips spaced apart on said feeding surface of said web; or,

the flexible bearing layer is a whole flexible belt laid on the conveying surface of the belt body.

10. The stringer according to claim 8, wherein the width of the flexible carrier layer is greater than or equal to the width of the battery piece and less than or equal to the width of the tape body, and the flexible carrier layer is silica gel or high temperature resistant sponge.

11. The stringer according to claim 1 or 2, wherein said heating portion includes a mounting frame, a heat generating component and an air blowing mechanism, wherein,

the heating assembly is arranged on the mounting frame and comprises heating sheets arranged at intervals and heating rods used for heating the heating sheets;

the blowing mechanism is installed on the installation frame and located above the heating assembly, and the blowing mechanism is used for blowing heat emitted by the heating sheet to the stacked battery sheets and the welding strip assembly.

12. The stringer of claim 10, wherein said heating section further comprises a drive mechanism, said mounting frame being connected to a drive end of said drive mechanism, said drive mechanism being configured to drive said mounting frame to translate and/or lift.

13. The stringer of claim 12, wherein said mounting frame is reversibly connected to a drive end of said drive mechanism via a rotational connection.

14. A method of welding a battery string, the method comprising:

attaching a front film and a back film to the front and the back of the parallel welding strips at intervals;

cutting the solder strip attached with the front surface film and the back surface film into solder strip assemblies, wherein each solder strip assembly comprises a solder strip, the front surface film attached to the front section part of the solder strip and the back surface film attached to the back section part of the solder strip;

stacking the welding strip assembly and the battery piece, wherein the ith battery piece is stacked on the upper side of the rear section part of the ith welding strip assembly, the front section part of the (i + 1) th welding strip assembly is stacked on the ith battery piece, and i is any natural number greater than 0;

and pressing the stacked battery plates and the welding strip assembly together to form a battery string.

15. The method of claim 14, wherein attaching a front film and a back film to the front and back surfaces of a plurality of parallel solder ribbons at intervals comprises:

drawing out a plurality of parallel welding strips;

adsorbing the jth section of front film to be attached at a front film adsorption station and cutting the jth section of front film, and attaching the adsorbed jth section of front film to the front of the pulled welding strip at the front film adsorption station;

and adsorbing the j section of back film to be attached at a back film adsorption station and cutting off the j section of back film, attaching the adsorbed j section of back film to the back of the pulled welding strip at the back film adsorption station, wherein the front film and the back film attached to the welding strip are distributed at intervals, and j is a natural number greater than 0.

16. A method of welding a battery string, the method comprising:

attaching a front surface film to the front surfaces of the parallel welding strips;

cutting the solder strip attached with the front surface film into solder strip components, wherein each solder strip component comprises a solder strip and the front surface film attached to the solder strip;

and stacking the welding strip assembly and the battery piece, wherein the back half section of the ith welding strip assembly is stacked on the ith battery piece, the front half section of the ith welding strip assembly is stacked on the (i-1) th battery piece, and i is any natural number which is more than 1 and less than N + 1.

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