Transport device, transport method and string welding machine

Abstract

The present invention provides a transport device, a transport method, and a stringer, wherein the transport device includes a moving mechanism, a plurality of rows of first needles, and a blanking mechanism, wherein: the plurality of rows of first needles are mounted on a movable component of the moving mechanism, each row of first needles is arranged along a first direction, each row of first needles is used to pierce a first film strip from a first feeding position under the drive of the moving mechanism, and to transport the pierced first film strip to a blanking position under the drive of the moving mechanism; the blanking mechanism is disposed on a movable component of the moving mechanism, and is used to press the first film strip when the first film strip reaches the blanking position, so that the first film strip is separated from the first needles. The transport device of the present invention pierces and transports the first film strip using the first needles. After the first film strip is transported to the blanking position, the blanking mechanism presses the first film strip so that the film strip falls onto the battery cell. The present invention achieves precise piercing and transport of the film strip.

Description

Technical Field

[0001] The present invention relates to the field of battery production, in particular to a transport device, a transport method and a string welding machine. Background Art

[0002] The silicon wafers used in mainstream photovoltaic cells on the market today are approximately 170-180 μm thick. During the cell processing process, a silver (or silver-copper) paste is printed on the surface of the crystalline silicon wafers. After drying or sintering, the photocurrent within the cell is then conducted away through the metal paste. In mainstream photovoltaic modules, the cells are interconnected using metal ribbons coated with a tin-lead alloy. These ribbons are welded to the cells using a dedicated infrared welder, typically at temperatures between 220°C and 350°C. The tin-lead alloy melts at this high temperature, fusing the ribbons to the silver paste on the cell surface.

[0003] Traditional battery module interconnection solutions use high-temperature processes, which can cause stress warping of silicon wafers, leading to hidden cracks and breakage, and making thin-filming difficult. At the same time, in order to achieve effective welding, a large amount of silver is required as the main grid electrode under the solder ribbon. This large amount of silver main grid leads to high silver paste and battery costs.

[0004] In order to overcome the above-mentioned problems of the traditional battery module interconnection solution, a method of using film strips to adhere welding ribbons to battery cells to form battery strings has emerged, which is suitable for stringing thin battery cells.

[0005] Because the film strip is relatively thin and thin, the traditional clamping and handling mechanism is difficult to quickly clamp the film strip, resulting in low handling efficiency. In addition, the traditional clamping and handling mechanism is difficult to accurately attach the film strip to the welding strip segment. Summary of the Invention

[0006] In order to solve at least one of the above technical problems, the present invention first provides a transport device, the specific technical solution of which is as follows:

[0007] A handling device comprises a moving mechanism, a plurality of rows of first needles and a material unloading mechanism, wherein:

[0008] A plurality of rows of first needles are mounted on a movable component of the moving mechanism, each row of first needles being arranged along a first direction, and each row of first needles being used to pick up a first film strip from a first material taking position under the drive of the moving mechanism, and to transport the picked up first film strip to a material unloading position under the drive of the moving mechanism;

[0009] The unloading mechanism is arranged on the movable part of the moving mechanism, and is used for pressing the first film strip when the first film strip reaches the unloading position, so that the first film strip is separated from the first needle.

[0010] The transport device provided by the present invention uses a needle to pick up and transport the film strip. After the film strip is transported to the unloading position, the unloading mechanism presses the film strip so that the film strip falls onto the battery cell. Compared with the traditional clamping transport device, the transport device in this embodiment picks up the film strip by piercing, thereby achieving rapid picking up and transporting of the film strip.

[0011] In some embodiments, after completing the piercing of the first film strip, each row of first needles is also used to pierce the weld tape segment from the second position under the drive of the moving mechanism; the unloading mechanism is used to press the first film strip and the weld tape segment when the first film strip and the weld tape segment reach the unloading position, so that the first film strip and the weld tape segment are separated from the first needles.

[0012] The first needle simultaneously transfers the ribbon segments and film strips to the cell, improving cell stringing efficiency. Furthermore, by sequentially piercing the first film strip and then the ribbon segments, the first film strip is ensured to accurately cover the ribbon segments.

[0013] Optionally, the unloading mechanism includes a drive assembly and a pressure plate, wherein the drive assembly is installed on the movable part of the moving mechanism, and the pressure plate is connected to the drive end of the drive assembly. The pressure plate presses the first film strip under the drive of the drive assembly, thereby causing the first film strip to detach from the first needle.

[0014] The invention provides a blanking mechanism with simple structure and convenient control, which drives a pressing plate downward by a driving component to press the film strip and the welding strip segment.

[0015] In some embodiments, the unloading mechanism includes an adsorption component and a pressing tool. The adsorption component absorbs the pressing tool before the first needle pierces the first film strip, and releases the pressing tool when the first film strip reaches the unloading position, so that the first film strip is separated from the first needle.

[0016] By configuring the unloading mechanism to include an adsorption component and a pressing tool, on the one hand, the first membrane strip is pressed and unloaded, and on the other hand, the released pressing tool presses the welding strip segment and the membrane strip onto the battery cell, thereby improving the stringing quality of the battery cell.

[0017] In some embodiments, a plurality of blanking mechanisms are provided, and each blanking mechanism is located between two adjacent first needles.

[0018] The first film strip is pressed from different positions by multiple unloading mechanisms, so that the first film strip can be smoothly separated from the first needle in a water state and fall onto the battery cell.

[0019] In some embodiments, the transport device also includes several rows of second needles installed on the movable part of the moving mechanism, and each row of second needles is arranged along the second direction; each row of second needles is used to pierce the second film strips from the third material collection position under the drive of the moving mechanism, and move the pierced several second film strips to the unloading position under the drive of the moving mechanism.

[0020] By arranging the second needle on the movable part of the moving mechanism, the transport device of the present invention also has the function of transporting the second film strip.

[0021] In some embodiments, the second needle is staggered with the first needle in a second direction, wherein the second direction is perpendicular to the first direction.

[0022] By setting the positions of the second needle and the first needle, the second needle and the first needle do not interfere with each other. After the second needle pierces the second film strip, the first needle can avoid the second film strip and pierce the first film strip.

[0023] The present invention also provides a transport method, which comprises:

[0024] Controlling a plurality of rows of first needles to pierce the first film strip from the first material taking position, wherein each row of first needles pierces one first film strip;

[0025] The first film strip taken out is carried to the unloading position;

[0026] The unloading mechanism is controlled to press downward the first film strip transported to the unloading position, so that the first film strip is separated from the first needle.

[0027] The handling method provided by the present invention uses a first needle to pierce and transport the first film strip. After the first film strip is transported to the unloading position, the unloading mechanism presses the first film strip, causing it to fall onto the battery cell. Compared to traditional clamping-type handling methods, the present piercing and handling method achieves precise piercing and handling of the first film strip.

[0028] In some embodiments, before transporting the pierced first film strip to the unloading position, the transporting method also includes: controlling several rows of first needles to pierce the weld tape segment from the second picking position; controlling the unloading mechanism to press downward on the first film strip transported to the unloading position, including: controlling the unloading mechanism to press downward on the first film strip and the weld tape segment transported to the unloading position, so that the first film strip and the weld tape segment are separated from the first needles, and the first film strip covers the weld tape segment.

[0029] The first needle simultaneously transports the ribbon segments and film strips onto the cell, improving cell stringing efficiency. Furthermore, by sequentially piercing the first film strip and then the ribbon segments, the first film strip is ensured to precisely cover the ribbon segments.

[0030] In some embodiments, after controlling several rows of first needles to pierce the solder strip from the second material collection position, and before transporting the pierced first film strip to the unloading position, the transporting method also includes: controlling several rows of second needles to pierce the second film strip from the third material collection position, and the second film strip is used to bond two adjacent battery cells.

[0031] The present invention also provides a stringer, comprising a ribbon feeding mechanism, a ribbon processing mechanism, a film strip feeding mechanism, a handling device as described above, a cell feeding mechanism, a conveying mechanism, and a crimping mechanism, wherein:

[0032] The welding ribbon feeding mechanism is used to provide multiple parallel welding ribbons to the welding ribbon processing mechanism, and the welding ribbon processing mechanism is used to implement the dislocation, slitting and spacing processing of the multiple welding ribbons to obtain a plurality of welding ribbon segments;

[0033] The film strip feeding mechanism is arranged above or on the side of the welding strip processing mechanism;

[0034] The transport device is used to pick up the film strip from the film strip feeding mechanism and pick up the welding strip segments after the separation process from the welding strip processing mechanism;

[0035] The cell feeding mechanism is used to place a number of cell sheets onto the conveying mechanism;

[0036] The handling device is also used to stack the pierced solder ribbon segments and film strips onto the corresponding battery cells;

[0037] The conveying mechanism is used to convey the stacked battery cells, welding ribbon segments and film strips to the crimping mechanism, and the crimping mechanism is used to press the stacked battery cells, welding ribbon segments and film strips into a string.

[0038] Through the cooperation of the soldering ribbon feeding mechanism, the soldering ribbon processing mechanism, the film strip feeding mechanism, the handling device, the battery cell feeding mechanism, the conveying mechanism and the crimping mechanism, the string welding machine of the present invention realizes the automatic crimping of battery cells into strings, thereby improving the production efficiency of the battery string.

[0039] In some embodiments, a first heating component is provided on the conveying mechanism, and / or a second heating component is provided on the unloading mechanism.

[0040] By arranging a heating component on the conveying mechanism and / or the unloading mechanism, the welding strip segment and the film strip are heated, so that the welding segment is bonded to the battery cell through the melted film strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of a transport process of a transport device provided by one embodiment of the present invention;

[0042] Figure 2A schematic diagram of a transport process of a transport device provided by another embodiment of the present invention;

[0043] Figure 3 A flowchart of an implementation of a transport method provided in accordance with an embodiment of the present invention;

[0044] Figure 4 A flowchart of a transport method according to another embodiment of the present invention;

[0045] Figure 5 A flowchart of a transport method according to another embodiment of the present invention;

[0046] Figure 1 and Figure 5 Included are:

[0047] First needle 1, blanking mechanism 2, second needle 3;

[0048] First film strip 100 , welding strip segment 200 , second film strip 300 , battery cell 400 . DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Since the film strips are relatively thin and fine, it is difficult for traditional clamping and transporting mechanisms to quickly clamp the film strips, resulting in low transport efficiency.

[0051] To this end, the present invention provides a transport device that uses a needle-piercing method to pick up and transport film strips, thereby improving transport efficiency. The following will exemplarily describe the transport device of the present invention through two embodiments.

[0052] First embodiment

[0053] like Figure 1 As shown, the transport device in this embodiment includes a moving mechanism (not shown), a plurality of rows of first needles 1 ( Figure 1 Only one row is shown) and a blanking mechanism 2, wherein:

[0054] Several rows of first needles 1 are mounted on the movable part of the moving mechanism, and each row of first needles 1 is moved in a first direction (such as Figure 1 The first needles 1 in each row are arranged in the X-axis direction, and are used to pierce the first film strip 100 from the first material picking position under the drive of the moving mechanism, and to transport the pierced first film strip 100 to the unloading position under the drive of the moving mechanism.

[0055] The unloading mechanism 2 is arranged on the movable part of the moving mechanism, and the unloading mechanism 2 is used to press the first film strip when the first film strip reaches the unloading position, so that the first film strip is separated from the first needle 1.

[0056] Compared with the traditional clamping and transporting device, the transporting device in this embodiment picks up the membrane strips in a piercing manner, thereby realizing rapid picking up and transporting of the membrane strips. It is suitable for transporting the membrane strips from the membrane strip feeding mechanism and stacking them on the battery cells during the battery stringing process.

[0057] As those skilled in the art are aware, the battery stringing method of bonding solder ribbon segments to battery cells using film strips has the drawback that, during the crimping process, bubbles are easily generated between the film strips and the battery cells. These bubbles are not conducive to forming a vacuum environment within the battery cell assembly, ultimately leading to reduced battery assembly performance. However, the film strips transported by the transport device of this embodiment have puncture holes formed therein. During the subsequent crimping process of the battery cells, air between the film strips and the battery cells can be discharged through the puncture holes, thereby preventing the formation of bubbles between the film strips and the battery cells and ultimately improving battery assembly performance.

[0058] In some battery cell string applications, the ribbon segments are stacked on the battery cells before the film strips are transported and stacked. In these applications, the transport process of the film strips by the transport device in this embodiment is as follows:

[0059] First, the moving mechanism drives several rows of first needles 1 to move to the first material picking position (such as the location of the film strip supply mechanism), and makes each row of first needles 1 align with a first film strip 100. Then, the first needles 1 are controlled to descend synchronously, so that each row of first needles 1 pierces the corresponding first film strip 100.

[0060] Next, the moving mechanism drives several rows of first needles 1 carrying the first film strips to move above the battery cell (i.e., the unloading position), and aligns each first film strip 100 with a welding ribbon segment 200 or several welding ribbon segments 200 located in the same straight line. Subsequently, the several first needles 1 are controlled to descend synchronously, so that each row of first needles 1 is pressed tightly against the corresponding welding ribbon segment 200.

[0061] Finally, the blanking mechanism 2 presses the first film strips 100 downward, so that each first film strip is separated from the first needle 1 and covers the corresponding welding strip segment 200 .

[0062] To improve the efficiency of stringing cells, in some other cell stringing applications, the handling device of this embodiment simultaneously transports and stacks the solder ribbon segments and film strips onto the laid cell 400. The specific handling process is as follows:

[0063] First, the moving mechanism drives several rows of first needles 1 to move to the first material picking position (such as the location of the film strip supply mechanism), and makes each row of first needles 1 align with a first film strip 100. Then, the several rows of first needles 1 are controlled to descend synchronously, so that each row of first needles 1 pierces the corresponding first film strip 100.

[0064] Next, the moving mechanism drives the rows of first needles 1 carrying the first film strip 100 to move to the second material collection position (such as the position of the solder strip processing mechanism), and makes each row of first needles 1 align with a solder strip segment 200 or several solder strip segments 200 located in the same straight line. Subsequently, the moving mechanism drives the first needles 1 to descend synchronously, so that each row of first needles 1 pierces the corresponding solder strip segment.

[0065] Next, the moving mechanism drives the rows of first needles 1 carrying the first film strip 100 and the welding ribbon segment 200 to move to above the battery cell (i.e., the unloading position). Subsequently, the rows of first needles 1 are controlled to synchronously descend to a low position.

[0066] Finally, the blanking mechanism 2 presses the first film strips 100 and the welding strip segments 200 downward, so that each first film strip 100 and welding strip segment 200 is separated from the first needle 1 and stacked on the corresponding battery cell 400.

[0067] Optionally, the unloading mechanism 2 includes a drive assembly and a pressure plate, wherein the drive assembly is mounted on the movable part of the moving mechanism, and the pressure plate is connected to the driving end of the drive assembly. Driven by the drive assembly, the pressure plate presses against the first film strip, thereby separating the first film strip 100 from the first needle 1. Of course, the pressure plate may also remain stationary, controlling the upward movement of the first needle 1, and the first film strip 100 on the first needle 1 is blocked by the pressure plate, thereby separating from the first needle 1.

[0068] There can be multiple unloading mechanisms 2, each of which is located between two adjacent first needles 1. Multiple unloading mechanisms 2 press the first film strip from different positions, so that the first film strip smoothly separates from the first needles 1 in a water state and falls onto the battery cell.

[0069] Optionally, the unloading mechanism 2 includes an adsorption component and a pressing tool, wherein the adsorption component is installed on the movable part of the moving mechanism. Before the first needle 1 pierces the first film strip, the adsorption component first absorbs the pressing tool. In this way, after the first needle 1 pierces the first film strip, the pressing tool is located above the first film strip. When the first film strip reaches the unloading position, the adsorption component releases the pressing tool, and during the falling process of the pressing tool, it drives the first film strip to be unloaded. Finally, the first film strip and the welding strip segment are pressed on the battery cell by the pressing tool, thereby improving the stringing quality of the battery cell.

[0070] Second embodiment

[0071] To further enhance the bond strength between the ribbon segments and the cell, and improve string quality, in some cell stringing applications, a second film strip can be stacked on adjacent cells. The ribbon segments are then bonded to the corresponding cell using the melted second film strip and the first film strip.

[0072] In order to realize the transportation of the second film strip, Figure 2 Compared with the transport device in the first embodiment, the transport device in this embodiment further includes a plurality of columns ( Figure 2 A total of 6 rows of second needles 3 are shown, and each row of second needles 3 is arranged perpendicular to the first direction (eg Figure 2 The second needles 3 in each row are used to pick up the second film strip 300 from the third material taking position under the drive of the moving mechanism, and to move the picked up second film strip 300 to the material unloading position under the drive of the moving mechanism.

[0073] By adding the second needle 3, the transport device in this embodiment can simultaneously transport and stack the first film strip 100, the welding ribbon segment 200 and the second film strip 300 onto the laid-out battery cell 400. The specific transport process is as follows:

[0074] First, the moving mechanism drives several rows of first needles 1 and several rows of second needles 3 to move synchronously to the first material picking position (such as the position of the first film strip supply mechanism), and makes each row of first needles 1 align with a first film strip 100. Then, the several rows of first needles 1 are controlled to descend synchronously, so that each row of first needles 1 pierces the corresponding first film strip 100.

[0075] Next, the moving mechanism drives several rows of first needles 1 carrying the first film strip, and several rows of second needles 3 to move synchronously to the second material collection position (such as the position of the solder strip processing mechanism), and makes each row of first needles 1 align with a solder strip segment 200 or several solder strip segments 200 located in the same straight line. Subsequently, the several rows of first needles 1 are controlled to descend synchronously, so that each row of first needles 1 pierces the corresponding solder strip segment 200.

[0076] Next, the moving mechanism drives the rows of first needles 1 carrying the first film strip and the welding ribbon segment, and the rows of second needles 3 to move synchronously to the third material taking position (such as the location of the second film strip supply mechanism), and makes each row of second needles align with a second film strip 300. Then, the rows of second needles 3 are controlled to descend synchronously, so that each row of second needles 3 pierces the corresponding second film strip 300.

[0077] Next, the moving mechanism drives the rows of first needles 1 carrying the first film strips 100 and the solder ribbon segments 200, and the rows of second needles 3 carrying the second film strips 300, to move above the battery cells (i.e., the unloading position). Subsequently, the rows of first pressing needles 2 and the rows of second needles 3 are controlled to synchronously descend to the lower position.

[0078] Finally, the unloading mechanism 2 presses downward against the first film strip 100, the welding ribbon segments 200, and the second film strip 300, causing each first film strip 100 and welding ribbon segment 200 to detach from the first needle 1, and each second film strip 300 to detach from the second needle 3, and finally be stacked on the corresponding battery cell 400. That is, the second film strips 300 are stacked on the battery cell 400 along the second direction (such as the Y-axis direction), and each second film strip 300 is placed between two adjacent battery cells. The welding ribbon segments 200 are stacked on the second film strips 300 along the first direction (such as the X-axis direction). The first film strip 100 is then covered on the corresponding welding ribbon segment 200 along the first direction.

[0079] Optionally, in this embodiment, the second needle 3 is offset from the first needle 1 in the second direction. This prevents interference between the second needle 3 and the first needle 1. After the second needle 3 pierces the second film strip 300, the first needle 1 can avoid the second film strip 300 and continue piercing the first film strip 100.

[0080] Of course, the second needle 3 and the first needle 1 may also be arranged in the same position. In this case, when the first needle 1 pierces the first film strip 100 , it may be necessary to pierce the second film strip 300 first.

[0081] The present invention further provides a transporting method, which implements the picking up and transporting of the film strips by piercing. The transporting method of the present invention will be exemplarily described below through three embodiments.

[0082] Third embodiment

[0083] The transport method in this embodiment can be implemented by the transport device of the first embodiment described above, such as Figure 3 As shown, it includes the following steps:

[0084] S101, controlling a plurality of rows of first needles to pierce a first film strip from a first material taking position, wherein each row of first needles pierces one first film strip.

[0085] S102, transporting the first film strip taken by pricking to a material unloading position.

[0086] S103, controlling the unloading mechanism to press downward the first film strip transported to the unloading position, so that the first film strip is separated from the first needle.

[0087] It can be seen that compared with the traditional clamping and transporting method, the transporting method in this embodiment implements the picking up of the membrane strips in a piercing manner, thereby realizing the rapid picking up and transporting of the membrane strips. It is suitable for transporting and stacking the membrane strips from the membrane strip feeding mechanism to the battery cell during the battery stringing process.

[0088] For more specific processing details of the transport method of this embodiment, please refer to the relevant content of the transport device in the first embodiment above, which will not be repeated here.

[0089] Fourth embodiment

[0090] The transport method in this embodiment can be implemented by the transport device in the first embodiment, such as Figure 4 As shown, it includes the following steps:

[0091] S201, controlling a plurality of rows of first needles to pierce a first film strip from a first material taking position, wherein each row of first needles pierces one first film strip.

[0092] S202, controlling a plurality of rows of first needles to pick up the welding ribbon segments from the second picking position.

[0093] S203, transporting the first film strip and the welding ribbon segment obtained by piercing to a material unloading position.

[0094] S204, controlling the unloading mechanism to press downward the first film strip and the welding tape segment transported to the unloading position, so that the first film strip and the welding tape segment are separated from the first needle, and the first film strip covers the welding tape segment.

[0095] Compared with the transport method in the third embodiment, the transport method in this embodiment can simultaneously transport and stack the first membrane strip welding tape segments onto the laid-out battery cells, which improves the stringing efficiency of the battery cells.

[0096] For more specific processing details of the transport method of this embodiment, please refer to the relevant content of the transport device in the first embodiment above, which will not be repeated here.

[0097] Fifth embodiment

[0098] The transport method in this embodiment can be implemented by the transport device in the second embodiment, such as Figure 5 As shown, it includes the following steps:

[0099] S301, controlling a plurality of rows of first needles to pierce a first film strip from a first material taking position, wherein each row of first needles pierces one first film strip.

[0100] S302, controlling a plurality of rows of first needles to pick up the welding ribbon segments from the second material picking position.

[0101] S303, controlling a plurality of rows of second needles to pierce the second film strip from the third material taking position.

[0102] S304: transport the first film strip, the welding strip segment and the second film strip that have been pierced to a material unloading position.

[0103] S305. Control the unloading mechanism to press downward the first film strip, the welding strip segment and the second film strip that are transported to the unloading position, so that the second film strip is separated from the second needle, the first film strip and the welding strip segment are separated from the first needle, and the welding strip segment is stacked on the second film strip, and the first film strip covers the welding strip segment.

[0104] For more specific processing details of the transport method of this embodiment, please refer to the relevant content of the transport device in the second embodiment above, which will not be repeated here.

[0105] Finally, the present invention further provides a stringer for crimping back-connected solar cells (IBC solar cells) into strings. Specifically, the stringer includes a solder ribbon feeding mechanism, a solder ribbon processing mechanism, a film strip feeding mechanism, a handling device as described in any of the above embodiments, a solar cell feeding mechanism, a conveying mechanism, and a crimping mechanism, wherein:

[0106] The welding ribbon feeding mechanism is used to provide multiple parallel welding ribbons to the welding ribbon processing mechanism, and the welding ribbon processing mechanism is used to implement the dislocation, slitting and spacing processing of the multiple welding ribbons to obtain several groups of staggered welding ribbon segments.

[0107] The film strip feeding mechanism is arranged above or on the side of the welding strip processing mechanism.

[0108] The transport device is used to pierce the film strip from the film strip feeding mechanism and pierce the welding strip segment after the separation process from the welding strip feeding mechanism. The transport device can only pierce the first film strip, or it can pierce the first film strip and then pierce the second film strip.

[0109] The battery cell feeding mechanism is used to place a number of battery cells onto the conveying mechanism.

[0110] The handling device is also used to stack the pierced solder ribbon segments and film strips onto the corresponding battery cells;

[0111] The conveying mechanism is used to convey the stacked battery cells, welding ribbon segments and film strips to the crimping mechanism, and the crimping mechanism is used to press the stacked battery cells, welding ribbon segments and film strips into a string.

[0112] It can be seen that through the cooperation of the solder ribbon feeding mechanism, the solder ribbon processing mechanism, the film strip feeding mechanism, the handling device, the battery cell feeding mechanism, the conveying mechanism and the crimping mechanism, the stringing machine of the present invention realizes the automatic crimping of IBC battery cells into strings, thereby improving the production efficiency of the battery string.

[0113] In particular, the stringing machine provided by the present invention has a transport device that picks up the film strips in a piercing manner, thereby achieving rapid picking up and transporting of the film strips, and ultimately improving the efficiency of stringing the battery cells.

[0114] In addition, holes are formed on the membrane strips that are punctured and transported. During the pressing process, the air between the membrane strips and the battery cells can be discharged immediately through the holes, preventing the formation of bubbles between the membrane strips and the battery cells, thereby improving the welding quality of the battery string.

[0115] Optionally, a first heating assembly is provided on the conveying mechanism, and / or a second heating assembly is provided on the unloading mechanism. By providing the heating assemblies on the conveying mechanism and / or the unloading mechanism, the welding ribbon segments and the film strips are heated, so that the welded segments are eventually bonded to the cell through the melted film strips.

[0116] The present invention has been described above in sufficient detail with certain particularities. Those skilled in the art will appreciate that the descriptions in the embodiments are merely illustrative, and that all modifications that do not depart from the true spirit and scope of the invention are intended to be within the scope of protection of the present invention. The scope of protection claimed in the present invention is defined by the appended claims, not by the foregoing description of the embodiments.

Claims

1. A transport device, characterized in that: The transport device includes a moving mechanism, a plurality of rows of first needles and a material discharge mechanism, wherein: A plurality of rows of the first needles are mounted on a movable component of the moving mechanism, each row of the first needles being arranged along a first direction, and each row of the first needles being used to pick up a first film strip from a first material taking position under the drive of the moving mechanism, and to transport the picked first film strip to a material unloading position under the drive of the moving mechanism; The unloading mechanism is provided on the movable part of the moving mechanism, and is used for pressing the first film strip when the first film strip reaches the unloading position, so that the first film strip is separated from the first needle; After completing the pricking of the first film strip, each row of the first needles is further used to pierce the welding strip segment from the second position under the drive of the moving mechanism; The blanking mechanism is used to press the first film strip and the welding tape segment when the first film strip and the welding tape segment reach the blanking position, so that the first film strip and the welding tape segment are separated from the first needle.

2. The transport device according to claim 1, wherein The unloading mechanism includes a driving component and a pressure plate, wherein the driving component is installed on the movable part of the moving mechanism, and the pressure plate is connected to the driving end of the driving component. The pressure plate presses the first film strip under the drive of the driving component.

3. The transport device according to claim 1, wherein: The unloading mechanism includes an adsorption component and a pressing tool. The adsorption component absorbs the pressing tool before the first needle pierces the first film strip, and releases the pressing tool when the first film strip reaches the unloading position, so that the first film strip is separated from the first needle.

4. The transport device according to claim 1, wherein: There are multiple blanking mechanisms, and each blanking mechanism is located between two adjacent first needles.

5. The transport device according to claim 1, wherein: The transport device further comprises a plurality of rows of second needles mounted on the movable component of the moving mechanism, wherein each row of the second needles is arranged along the second direction; The second needles in each row are used to pierce the second film strips from the third material taking position under the drive of the moving mechanism, and to move the pierced second film strips to the material unloading position under the drive of the moving mechanism.

6. The transport device according to claim 5, wherein: The second needle is staggered with the first needle in the second direction, wherein the second direction is perpendicular to the first direction.

7. A method of transporting, characterized in that: The transport method comprises: Controlling a plurality of rows of first needles to pierce a first film strip from a first material taking position, wherein each row of the first needles pierces one first film strip; The first film strip taken out is carried to the unloading position; controlling the unloading mechanism to press downward the first film strip transported to the unloading position so that the first film strip is separated from the first needle; Before transporting the pierced first film strip to the unloading position, the transport method further includes: Controlling a plurality of rows of the first needles to pick up the welding ribbon segments from the second picking position; The controlling unloading mechanism to press downward the first film strip transported to the unloading position comprises: The unloading mechanism is controlled to press downward the first film strip and the welding tape segment transported to the unloading position, so that the first film strip and the welding tape segment are separated from the first needle, and the first film strip covers the welding tape segment.

8. The transport method according to claim 7, wherein: After controlling the plurality of rows of the first needles to pierce the solder strip from the second material taking position, and before transporting the pierced first film strip to the unloading position, the transport method further includes: A plurality of rows of second needles are controlled to pierce a second film strip from a third material taking position, where the second film strip is used to bond two adjacent battery cells.

9. A string welding machine, characterized in that: The stringer includes a ribbon feeding mechanism, a ribbon processing mechanism, a film strip feeding mechanism, a handling device according to any one of claims 1 to 6, a cell feeding mechanism, a conveying mechanism, and a crimping mechanism, wherein: The welding ribbon feeding mechanism is used to provide multiple parallel welding ribbons to the welding ribbon processing mechanism, and the welding ribbon processing mechanism is used to perform dislocation, slitting and spacing processing on the multiple welding ribbons to obtain multiple welding ribbon segments; The film strip feeding mechanism is arranged above or on the side of the welding strip processing mechanism; The transport device is used to pierce the film strip from the film strip feeding mechanism and to pierce the welding strip segments after the spacing process is completed from the welding strip processing mechanism; The battery cell feeding mechanism is used to lay a plurality of battery cells onto the conveying mechanism; The transport device is also used to stack the extracted solder ribbon segments and film strips onto the corresponding battery cells; The conveying mechanism is used to convey the stacked battery cells, welding ribbon segments and film strips to the crimping mechanism, and the crimping mechanism is used to press the stacked battery cells, welding ribbon segments and film strips into a string.

10. The stringer according to claim 9, wherein: The conveying mechanism is provided with a first heating component, and / or the unloading mechanism is provided with a second heating component.

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