Carrying mechanism and battery string forming equipment

Abstract

The utility model provides a carrying mechanism and battery bunching equipment, the carrying mechanism comprises a moving mechanism, a first mounting rack, a first heating light source, a second heating light source and a plurality of first suckers, the first mounting rack is connected to a movable part of the moving mechanism; the first sucker is arranged on the first mounting frame, the first heating light source and the second heating light source are located on two opposite sides of the first sucker, and the bottoms of the first heating light source and the second heating light source are both higher than the adsorption end of the first sucker. According to the carrying mechanism, in the cell carrying process, the first heating light source and the second heating light source can heat the two long edges of the cell in a non-contact mode, subfissure of the cell in the heating process is prevented, the heated cell can be pre-bonded with the back face membrane after being placed on the laid welding strip set and the back face membrane, and therefore the cell carrying efficiency is improved. Therefore, it is ensured that the battery piece is conveyed forwards along with the back membrane, and position deviation of the battery piece and the welding strip set in the conveying process is avoided.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell production equipment, and more specifically to a transport mechanism and cell stringing equipment. Background Art

[0002] Conventional solar cells have horizontally extending fine grid lines and vertically extending main grid lines on both the front and back sides for collecting current. The main grid lines are much wider than the fine grid lines. Since a large amount of the surface area of ​​the solar cell is occupied by the main grid lines, the light-receiving area of ​​the solar cell is greatly reduced, which ultimately limits the photovoltaic conversion efficiency of the solar cell. In order to increase the light-receiving area of ​​the solar cell and improve the photovoltaic conversion efficiency, the industry has proposed to eliminate the main grid lines, make the diameter of the welding ribbon very small, reduce the number of solder pads on the solar cell that overlap with the welding ribbon, or even eliminate the solder pads on the solar cell and directly overlap the welding ribbon with the fine grid on the solar cell.

[0003] In order to realize the extraction of the current collected by all the fine grids on the battery cell, the welding ribbon is required to achieve contact and conduction with each fine grid. Using the traditional series connection method, the welding ribbon cannot form a strong connection after being connected in series with the battery cell. Therefore, in the industry, the welding ribbon is usually first bonded to the surface of the battery cell through a film, and then heated after bonding into a battery string to form a metallized connection between the welding ribbon and the fine grid of the battery cell. During the laying of the battery string, after the back film and the welding ribbon group are laid, the battery cell needs to be transported and laid by a conveying device. In order to enable the battery cell to be transported together with the back film and the welding ribbon group after laying, the conveying device heats the battery cell during the transportation process, so that the back film can be heated after the battery cell is laid, thereby achieving pre-bonding with the back film.

[0004] The existing transport mechanism is equipped with a hot press that heats the battery cells through contact heating. The problem with this heating method is that the battery cells are thin and brittle, and the contact heating process can easily cause hidden cracks in the battery cells and also cause contamination on the battery cell surface. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides a transport mechanism, which adopts the following technical solutions:

[0006] A transport mechanism is used in a battery stringing device for connecting battery cells in series. The transport mechanism includes a moving mechanism, a first mounting frame, a first heating light source, a second heating light source, and a plurality of first suction cups, wherein:

[0007] The first mounting frame is connected to the movable component of the moving mechanism, and the moving mechanism is configured to drive the first mounting frame to move horizontally and vertically;

[0008] A plurality of first suction cups are arranged on the first mounting frame, and the first heating light source and the second heating light source are arranged on the first mounting frame at intervals along the first horizontal direction. The first heating light source and the second heating light source are located on opposite sides of the plurality of first suction cups, and the bottoms of the first heating light source and the second heating light source are both higher than the adsorption end of the first suction cup.

[0009] The conveying mechanism provided in the present application is provided with a first heating light source and a second heating light source located on both sides of the first suction cup. When the moving mechanism drives the first suction cup to absorb the battery cell, the two long sides of the battery cell are respectively located below the first heating light source and the second heating light source. In this way, during the process of conveying the battery cell, the first heating light source and the second heating light source heat the two long sides of the battery cell. After the heated battery cell is placed on the laid solder tape group and the back film, it can be pre-bonded with the back film, thereby ensuring that the battery cell is conveyed forward with the back film, thereby avoiding positional displacement of the battery cell and the solder tape group during the conveying process. In addition, the two sides of the long sides of the back film are bonded to the lower surface of the battery cell, thereby avoiding shrinkage deformation of the back film in the width direction.

[0010] In addition, since the first heating light source and the second heating light source are non-contact heating, they will not cause compression to the battery cell, thereby preventing the battery cell from cracking.

[0011] In some embodiments, the second heating light source has the same structure as the first heating light source; the first heating light source includes a substrate and a heating lamp tube extending along a second horizontal direction, the substrate is mounted at the bottom of the first mounting bracket, and the heating lamp tube is mounted on the substrate; or, the first heating light source includes a substrate and a plurality of LED lamp beads, wherein the substrate is mounted at the bottom of the first mounting bracket, and the plurality of LED lamp beads are spaced apart on the substrate along the second horizontal direction; the second horizontal direction is perpendicular to the first horizontal direction.

[0012] When the first suction cup holds the cell, one of the long sides of the cell is located below the first heating light source and extends along the second horizontal direction. Therefore, a heating lamp extending along the second horizontal direction or a plurality of LED lamp beads spaced apart along the second horizontal direction is used as the first heating light source, thereby enabling the first heating light source to uniformly heat one of the long sides of the cell in all directions, ensuring a heating effect on that long side. Similarly, because the second heating light source has the same structure as the first heating light source, when the first suction cup holds the cell, the other long side of the cell is located below the second heating light source and extends along the second horizontal direction. Therefore, the second heating light source can uniformly heat the other long side of the cell in all directions, ensuring a heating effect on that long side.

[0013] In some embodiments, a heat pipe is connected between the substrate and the first mounting frame.

[0014] By connecting a heat pipe between the base plate of the first heating light source and the first mounting frame, the heat generated by the first heating light source can be quickly transferred to the first mounting frame, thereby achieving rapid heat dissipation and cooling of the first heating light source, thereby extending the service life of the first heating light source. Similarly, by connecting a heat pipe between the base plate of the second heating light source and the first mounting frame, the heat generated by the second heating light source can be quickly transferred to the first mounting frame, thereby achieving rapid heat dissipation and cooling of the second heating light source, thereby extending the service life of the second heating light source.

[0015] In some embodiments, the first mounting frame is a fin plate, or a water cooling pipeline is provided in the first mounting frame.

[0016] By providing the first mounting frame with a fin plate, or providing a water cooling pipe inside the first mounting frame, the first mounting frame has good heat dissipation performance, so that the first mounting frame can quickly dissipate heat and cool down components such as the first heating light source, the second heating light source and the first suction cup arranged thereon, thereby extending the service life of each component.

[0017] In some embodiments, the conveying mechanism also includes a first pressing member and a second pressing member, wherein: the first pressing member is arranged close to the first heating light source, and the second pressing member is arranged close to the second heating light source; the pressing ends of the first pressing member and the second pressing member are at the same height and are lower than the bottom of the first heating light source and the second heating light source.

[0018] By setting up the first pressing member and the second pressing member, when the heated battery cell is placed on the laid welding tape group and the back film, the first pressing member and the second pressing member can press the two long sides of the battery cell downward respectively, thereby increasing the pre-bonding strength between the two long sides of the battery cell and the back film.

[0019] In some embodiments, the first pressing member includes a first pressing plate arranged on one side of the first heating light source, or a first pressing plate arranged in pairs on both sides of the first heating light source in the first horizontal direction; the second pressing member includes a second pressing plate arranged on one side of the second heating light source, or a second pressing plate arranged in pairs on both sides of the second heating light source in the first horizontal direction; a flexible layer is provided at the bottom of the first pressing plate and the second pressing plate.

[0020] By setting the first pressing member as a first pressing plate located on the side of the first heating light source, the first pressing member can be prevented from blocking the first heating light source while ensuring the first pressing member's pressing effect on one of the long sides of the battery cell. Similarly, by setting the second pressing member as a second pressing plate located on the side of the second heating light source, the second pressing member can be prevented from blocking the second heating light source while ensuring the second pressing member's pressing effect on the other long side of the battery cell. A flexible layer is provided at the bottom of the first and second pressing plates, allowing the first and second pressing plates to implement flexible compression on the battery cell, preventing pressure damage to the battery cell.

[0021] In some embodiments, the transport mechanism further includes at least one third heating light source, which is disposed on the first mounting bracket and located between the first heating light source and the second heating light source, and the bottom of the third heating light source is higher than the adsorption end of the first suction cup.

[0022] By setting a third heating light source and setting the third heating light source between the first heating light source and the second heating light source, during the process of transporting the battery cell, the third heating light source can heat the middle part of the battery cell, so that the middle part of the battery cell is also heated. In this way, when the battery cell is placed on the laid welding ribbon group and the back film, the two long sides and the middle part of the battery cell can be pre-bonded to the back film.

[0023] In some embodiments, the third heating light source includes a substrate and a heating lamp tube extending along a second horizontal direction, the substrate is mounted at the bottom of the first mounting bracket, and the heating lamp tube is mounted on the substrate; or, the third heating light source includes a substrate and a plurality of LED lamp beads, wherein the substrate is mounted at the bottom of the first mounting bracket, and the plurality of LED lamp beads are spaced apart on the substrate along the second horizontal direction; the second horizontal direction is perpendicular to the first horizontal direction.

[0024] By setting the third heating light source as a heating lamp tube extending along the second horizontal direction or a plurality of LED lamp beads spaced apart along the second horizontal direction, the third heating light source can achieve uniform heating of the middle part of the battery cell, thereby improving the bonding effect between the middle part of the battery cell and the back film.

[0025] In some embodiments, the transport mechanism further includes a third pressing member, which is disposed corresponding to the third heating light source, and a pressing end of the third pressing member is lower than a bottom of the third heating light source.

[0026] By setting up a third pressing member, when the heated battery cell is placed on the laid welding tape group and the back film, the third pressing member can press the middle part of the battery cell downward, thereby increasing the pre-bonding strength between the middle part of the battery cell and the back film.

[0027] In some embodiments, the first suction cup can be mounted on the first mounting frame in a floating manner via a buffer connection, or the first suction cup is fixedly mounted on the first mounting frame, and the first suction cup itself is elastic; the first suction cup is a vacuum suction cup or a Bernoulli suction cup.

[0028] The first suction cup is mounted on the first mounting frame in a floating manner, or the first suction cup itself is elastic. Therefore, after the first suction cup places the adsorbed battery cell on the laid welding ribbon group and the back film, the first mounting frame can continue to descend, so that the first suction cup can elastically press down the battery cell, increase the pre-bonding strength between the battery cell and the back film, and prevent the battery cell from being damaged by pressure.

[0029] In some embodiments, the transport mechanism further includes a second mounting frame and a plurality of magnetic components, wherein the second mounting frame is connected to the first mounting frame or the movable part of the moving mechanism, and the second mounting frame is arranged side by side with the first mounting frame; the moving mechanism is configured to drive the first mounting frame and the second mounting frame to translate and lift synchronously; and a plurality of magnetic components are installed at the bottom of the second mounting frame, and the magnetic components are used to adsorb the first material.

[0030] By setting a magnetic suction part side by side with the first suction cup, the first suction cup can place the pressing tooling on the previous battery cell while transporting the welding ribbon group and the back film of the battery cell, so that the transport mechanism can lay the battery cell and the pressing tooling at the same time, thereby improving the battery stringing efficiency.

[0031] In some embodiments, the transport mechanism further includes a plurality of second suction cups disposed on the second mounting frame, wherein the adsorption surface of the second suction cups is lower than the adsorption surface of the magnetic element, and the second suction cups are used to adsorb the second material located below the first material.

[0032] By setting a second suction cup, and setting the suction surface of the second suction cup to be lower than the suction surface of the magnetic element, the magnetic element can be controlled to absorb the pressing tooling first, and the second suction cup can be passed downward through the pressing tooling through the hollow part on the pressing tooling. Subsequently, the second suction cup is controlled to absorb the front film. In this way, while the first suction cup transports the battery cell to the welding ribbon group and the back film, the magnetic element and the second suction cup place the front film and the pressing tooling on the previous battery cell, so that the transport mechanism can achieve the simultaneous laying of the battery cell, the pressing tooling and the front film, further improving the efficiency of battery stringing.

[0033] In some embodiments, the second suction cup is a columnar suction cup arranged in a vertical direction.

[0034] Using a columnar suction cup as the second suction cup can ensure that when the magnetic suction component adsorbs the pressing tool, the second suction cup can pass downward through the hollow part on the pressing tool.

[0035] The present application also provides a battery stringing device, which includes any of the above-mentioned transport mechanisms.

[0036] The battery stringing device provided by the present application has a conveying mechanism provided with a first heating light source and a second heating light source located on both sides of the first suction cup. When the moving mechanism drives the first suction cup to absorb the battery cell, the two long sides of the battery cell are respectively located below the first heating light source and the second heating light source. In this way, during the transportation of the battery cell, the first heating light source and the second heating light source heat the two long sides of the battery cell. After the heated battery cell is placed on the laid solder ribbon group and the back film, it can be pre-bonded with the back film, thereby ensuring that the battery cell is conveyed forward with the back film, thereby avoiding positional offset of the battery cell and the solder ribbon group during the conveying process, and also avoiding hidden cracks in the battery cell caused by contact heating. In addition, the two sides of the long sides of the back film are bonded to the lower surface of the battery cell, thereby avoiding shrinkage and deformation of the back film in the width direction. Therefore, the battery stringing device of the present application improves the quality of battery stringing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of the transport mechanism in the first embodiment of the present application at one viewing angle;

[0038] Figure 2 This is a schematic structural diagram of the transport mechanism in the first embodiment of the present application from another perspective;

[0039] Figure 3 for Figure 2 AA cross-sectional view;

[0040] Figure 4 This is a schematic structural diagram of the transport mechanism in the second embodiment of the present application;

[0041] Figure 5 Schematic diagram of the structure of the transport mechanism in the third embodiment of the present application;

[0042] Figure 6 Schematic diagram of the structure of the transport mechanism in the fourth embodiment of the present application;

[0043] Figure 7 Schematic diagram of the structure of the transport mechanism in the fifth embodiment of the present application;

[0044] Figure 8 Schematic diagram of the laying process of some components in a battery string in an embodiment of the present application;

[0045] Figures 1 to 8 Included are:

[0046] First mounting frame 1: fin 11;

[0047] First heating light source 2: substrate 21, LED lamp beads 22;

[0048] A second heating light source 3;

[0049] First suction cup 4;

[0050] A first pressing member 5;

[0051] A second pressing member 6;

[0052] A third heating light source 7;

[0053] Second mounting frame 8;

[0054] Magnetic element 9;

[0055] Back film 10 , welding ribbon group 20 , battery cell 30 , front film 40 , pressing tool 50 . DETAILED DESCRIPTION

[0056] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0057] like Figure 8 As shown, during the battery stringing process, in order to ensure that the battery cells 30 can be transported together with the back film 10 and the welding ribbon assembly 20 after being laid, the transport device heats the battery cells 30 during the transport process, so that the back film 10 can be heated after the battery cells 30 are laid, thereby achieving pre-bonding with the back film 10.

[0058] The existing transport mechanism is equipped with a hot press that heats the battery cells 30 through contact heating. This heating method has the problem that the battery cells 30 are thin and brittle, and the contact heating process can easily cause hidden cracks in the battery cells 30 and also cause contamination on the surface of the battery cells 30.

[0059] To this end, the present application provides a transport mechanism used in a battery stringing device for connecting battery cells in series, which is at least used to transport and lay the battery cells onto the welding ribbon group and the back film.

[0060] Figures 1 to 3 The structure of the transport mechanism of the first embodiment of the present application is shown. Figure 4 The structure of the transport mechanism of the second embodiment of the present application is shown. Figure 5 The structure of the transport mechanism of the third embodiment of the present application is shown. Figure 6 The structure of the transport mechanism of the fourth embodiment of the present application is shown. Figure 7 The structure of the transport mechanism of the fifth embodiment of the present application is shown.

[0061] like Figures 1 to 7As shown, the transport mechanism in the embodiment of the present application includes a moving mechanism (not shown in the figure), a first mounting frame 1, a first heating light source 2, a second heating light source 3 and a plurality of first suction cups 4, wherein:

[0062] The first mounting frame 1 is connected to a movable component of a moving mechanism, and the moving mechanism is configured to drive the first mounting frame 1 to move horizontally and vertically.

[0063] Several first suction cups 4 are arranged on the first mounting frame 1, and the first heating light source 2 and the second heating light source 3 are arranged on the first mounting frame 1 at intervals along the first horizontal direction (for example, the X direction). The first heating light source 2 and the second heating light source 3 are located on opposite sides of the several first suction cups 4, and the bottoms of the first heating light source 2 and the second heating light source 3 are both higher than the adsorption end of the first suction cup 4.

[0064] The optional transport process of the battery cell by the transport mechanism in the embodiment of the present application is as follows:

[0065] The moving mechanism drives the first mounting frame 1 to move, so that the first suction cup 4 moves above the battery cell 30 to be transported, and the first heating light source 2 and the second heating light source 3 move above the two side edges of the battery cell 30 along the width direction (i.e., the two long sides of the battery cell).

[0066] Next, the moving mechanism drives the first mounting frame 1 to descend toward the battery cell 30 , so that the first suction cup 4 absorbs the battery cell 30 .

[0067] Subsequently, the moving mechanism drives the first mounting frame 1 to move above the solder ribbon assembly 20 and the back film 10, and the first suction cup 4 places the adsorbed cell 30 onto the solder ribbon assembly 20 and the back film 10. During this process, the first heating light source 2 and the second heating light source 3 respectively apply light heating to the two long sides of the cell 30.

[0068] In this way, when the battery cell 30 is placed on the welding ribbon assembly 20 and the back film 10, the two long sides of the battery cell 30 are pre-bonded to the back film 10, thereby ensuring that the battery cell 30 is conveyed forward along with the back film 10, and preventing the battery cell 30 from shifting relative to the welding ribbon assembly 20 during the conveying process. In addition, because the two long sides of the back film 10 are bonded to the lower surface of the battery cell 30, the back film 10 is prevented from shrinking and deforming in the width direction.

[0069] In addition, since the first heating light source 2 and the second heating light source 3 are non-contact light heating, they will not squeeze the battery cell 30, thereby preventing the battery cell 30 from generating hidden cracks after being compressed.

[0070] The moving mechanism in the embodiments of the present application may adopt various existing forms of moving mechanisms capable of driving the first mounting frame 1 to translate and elevate. For example, the moving mechanism includes a translation module and a lifting module connected to a movable component of the translation module, the first mounting frame 1 is connected to the movable component of the lifting module, the translation module is used to drive the first mounting frame 1 to translate, and the lifting module is used to drive the first mounting frame 1 to elevate. For another example, the moving mechanism is a multi-axis robotic arm, the first mounting frame 1 is connected to the end of the multi-axis robotic arm, and the multi-axis robotic arm drives the first mounting frame 1 to translate and elevate.

[0071] Optionally, the second heating light source 3 has the same structure as the first heating light source 2. Taking the first heating light source 2 as an example, Figures 1 to 7 As shown, in one optional embodiment, the first heating light source 2 includes a substrate 21 and a plurality of LED lamp beads 22, wherein the substrate 21 is mounted on the bottom of the first mounting frame 1, and the plurality of LED lamp beads 22 are spaced apart on the substrate 21 along a second horizontal direction (e.g., the Y direction), the second horizontal direction being perpendicular to the first horizontal direction. In another optional embodiment, the first heating light source 2 includes a substrate and heating lamps extending along the second horizontal direction, wherein the substrate is mounted on the bottom of the first mounting frame 1, and the heating lamps are mounted on the substrate.

[0072] Because one of the long sides of the cell 30 is located below the first heating light source 2 and extends along the second horizontal direction when the first suction cup 4 is attached to the cell, a heating lamp extending along the second horizontal direction or a plurality of LED lamp beads spaced apart along the second horizontal direction is used as the first heating light source 2, allowing the first heating light source 2 to uniformly heat one of the long sides of the cell. Similarly, when the first suction cup 4 is attached to the cell, the other long side of the cell 30 is located below the second heating light source 3 and extends along the second horizontal direction. Therefore, a heating lamp extending along the second horizontal direction or a plurality of LED lamp beads spaced apart along the second horizontal direction is used as the second heating light source 3, allowing the second heating light source 3 to uniformly heat the other long side of the cell 30.

[0073] Optionally, a heat pipe is connected between the substrate 21 of the first heating light source 2 and the first mounting frame 1. The heat generated by the first heating light source 2 can be quickly transferred to the first mounting frame 1 via the heat pipe, thereby enabling the first heating light source 2 to quickly dissipate heat and cool down, thereby extending the service life of the first heating light source 2. Similarly, a heat pipe is also connected between the substrate 21 of the second heating light source 3 and the first mounting frame 1. The heat generated by the second heating light source 3 can be quickly transferred to the first mounting frame 1 via the heat pipe, thereby enabling the second heating light source 3 to quickly dissipate heat and cool down, thereby extending the service life of the first heating light source 2.

[0074] like Figure 6As shown, optionally, the first mounting frame 1 is a fin plate, and a number of heat dissipating fins 11 arranged at intervals are provided on the fin plate. The heat generated by the first heating light source 2 and the second heating light source 3 is conducted to the first mounting frame 1 and then quickly dissipated through the heat dissipating fins 11, thereby realizing rapid heat dissipation and cooling of components such as the first heating light source 2, the second heating light source 3 and the first suction cup 4 set on the first mounting frame 1, thereby extending the service life of components such as the first heating light source 2, the second heating light source 3 and the first suction cup 4.

[0075] In another optional embodiment, a water cooling pipeline is provided in the first mounting frame 1. When the cooling water flows through the water cooling pipeline, heat exchange is generated with the first mounting frame 1, thereby implementing rapid cooling of the first mounting frame 1, and ultimately enabling the first mounting frame 1 to achieve rapid heat dissipation and cooling of components such as the first heating light source 2, the second heating light source 3 and the first suction cup 4.

[0076] like Figures 1 to 3 As shown, optionally, the transport mechanism in the embodiment of the present application further includes a first pressing member 5 and a second pressing member 6, wherein the first pressing member 5 is disposed near the first heating light source 2, and the second pressing member 6 is disposed near the second heating light source 3. The pressing ends of the first pressing member 5 and the second pressing member 6 are at the same height and are lower than the bottoms of the first heating light source 2 and the second heating light source 3.

[0077] By setting the first pressing member 5 and the second pressing member 6, when the first suction cup 4 places the heated battery cell 30 on the laid welding tape group and the back film, the first pressing member 5 and the second pressing member 6 can press the two long sides of the battery cell 30 downward respectively, thereby increasing the pre-bonding strength between the two long sides of the battery cell 30 and the back film.

[0078] like Figures 1 to 3 As shown, optionally, the first pressing member 5 includes a first pressing plate arranged in pairs on both sides of the first heating light source 2 in the first horizontal direction, and the second pressing member 6 includes a second pressing plate arranged in pairs on both sides of the second heating light source 6 in the first horizontal direction. This arrangement prevents the first pressing member 5 from blocking the first heating light source 2 while ensuring the first pressing member 5 has a pressing effect on one of the long sides of the battery cell 30. Similarly, while ensuring the second pressing member 6 has a pressing effect on the other long side of the battery cell 30, it prevents the second pressing member 6 from blocking the second heating light source 3.

[0079] Of course, the first pressing member 5 may also only include a first pressing plate arranged on one side of the first heating light source 2 , and the second pressing member 6 may also only include a second pressing plate arranged on one side of the second heating light source 3 .

[0080] To prevent the first and second pressing plates from damaging the battery cells, a flexible layer is provided at the bottom of each of the first and second pressing plates. The flexible layer is, for example, a rubber layer or a silicone layer attached to the bottom of each of the first and second pressing plates.

[0081] like Figure 4 and Figure 5 As shown, optionally, the conveying mechanism in the embodiment of the present application also includes a third heating light source 7, which is arranged on the first mounting frame 1 and located between the first heating light source 2 and the second heating light source 3, and the bottom of the third heating light source 7 is higher than the adsorption end of the first suction cup 4.

[0082] By setting a third heating light source 7 and setting the third heating light source 7 between the first heating light source 2 and the second heating light source 3, during the process of transporting the battery cell, the third heating light source 7 can heat the middle part of the battery cell 30, so that the middle part of the battery cell 30 can also be heated. In this way, when the battery cell 30 is placed on the laid welding tape group and the back film, the two long sides and the middle part of the battery cell 30 can be pre-bonded to the back film, further improving the bonding strength between the battery cell 30 and the back film.

[0083] Figure 4 In the illustrated embodiment, only one third heating light source 7 is provided, which is located in the middle between the first heating light source 2 and the second heating light source 3 . Figure 5 In the illustrated embodiment, three third heating light sources 7 are provided, and the three third heating light sources 7 are evenly arranged between the first heating light source 2 and the second heating light source 3. With this arrangement, the three third heating light sources 7, together with the first heating light source 2 and the second heating light source 3, can cooperate to uniformly heat the cell 300 in all directions, thereby achieving all-round adhesion between the cell 30 and the back film. Of course, in other embodiments, other numbers of third heating light sources 7, such as two or four, can also be provided.

[0084] like Figure 4 and Figure 5 As shown, optionally, the third heating light source 7 has the same structure as the first heating light source 2 and the second heating light source 3 in the previous embodiment, and includes a substrate and a plurality of LED lamp beads, wherein the substrate is mounted on the bottom of the first mounting frame 1, and the plurality of LED lamp beads are spaced apart on the substrate along the second horizontal direction. Alternatively, the third heating light source 7 includes a substrate and heating lamp tubes extending along the second horizontal direction, wherein the substrate is mounted on the bottom of the first mounting frame 1, and the heating lamp tubes are mounted on the substrate.

[0085] Optionally, the conveying mechanism in the embodiment of the present application further includes a third pressing member, which is arranged corresponding to the third heating light source 7 , and the pressing end of the third pressing member is lower than the bottom of the third heating light source 7 .

[0086] By setting up a third pressing member, when the first suction cup 4 places the heated battery cell 30 on the laid welding tape group and the back film, the third pressing member can press the middle part of the battery cell 30 downward, thereby increasing the pre-bonding strength between the middle part of the battery cell 30 and the back film.

[0087] Optionally, the third pressing member has the same structure as the first pressing member 5, including a third pressing plate arranged on one side of the third heating light source, or a third pressing plate arranged in pairs on both sides of the third heating light source in the first horizontal direction; a flexible layer is provided at the bottom of the third pressing plate.

[0088] Optionally, the first suction cup 4 can be mounted on the first mounting frame 1 in a floating manner via a buffer connector. Alternatively, the first suction cup 4 can be fixedly mounted on the first mounting frame 1. The first suction cup 4 is inherently elastic and can contract vertically when subjected to pressure. With this arrangement, after the first suction cup 4 places the adsorbed cell 30 onto the laid-out solder ribbon assembly and back film, the first mounting frame 1 can continue to descend, allowing the first suction cup 4 to elastically press down on the cell 30, increasing the pre-bonding strength between the cell 30 and the back film and preventing the first suction cup 4 from damaging the cell.

[0089] The first suction cup 4 can be a vacuum cup or a Bernoulli cup. When the first suction cup 4 is a vacuum cup, if the first mounting frame 1 is provided with a first pressing member 5 and a second pressing member 6, or if the first mounting frame 1 is provided with a first pressing member 5, a second pressing member 6, and a third pressing member, the suction end of the first suction cup 4 extends downward from each pressing member. In this way, the first suction cup 4 can smoothly absorb the battery cell 30. After the absorbed battery cell 30 is placed on the laid solder ribbon assembly and the back film, the first mounting frame 1 can continue to descend, thereby ensuring that each pressing member can be pressed against the battery cell 30.

[0090] When the first suction cup 4 is in Bernoulli suction, the suction end of the first suction cup 4 can be higher than the pressing end of each pressing member. The first suction cup 4 non-contactly sucks the battery cell 30 upward, so that the battery cell 30 rests against the pressing end of each pressing member. When the first mounting frame 1 is lowered, the pressing members press the battery cell 30 against the solder ribbon assembly and the back film, ensuring that the battery cell 30 and the back film are pre-bonded. The first suction cup 4 stops suctioning.

[0091] like Figure 7 As shown, the transport mechanism in the embodiment of the present application optionally further includes a second mounting frame 8 and a plurality of magnetic members 9, wherein the second mounting frame 8 is connected to the first mounting frame 1 or the movable component of the moving mechanism, and the second mounting frame 8 is arranged side by side with the first mounting frame 1. The moving mechanism is configured to drive the first mounting frame 1 and the second mounting frame 8 to move horizontally and vertically synchronously. The plurality of magnetic members 9 are mounted on the bottom of the second mounting frame 8 and are used to attract a first material, such as a compacting tool.

[0092] like Figure 7 and Figure 8 As shown, by providing a magnetic member 9 alongside the first suction cup 1, the first suction cup 1 simultaneously transports the current cell 30 to the solder ribbon assembly 20 and the back film 10 while the magnetic member 9 can place the pressing tool 50 onto the previous cell 30, so that the pressing tool 50 presses the front film 40 and the front half of the solder ribbon assembly 20 onto the previous cell 30. In other words, the transport mechanism can achieve simultaneous placement of the cell 30 and the pressing tool 50, thereby improving the efficiency of cell stringing.

[0093] The pressing tool 50 can adopt an existing pressing tool for pressing battery cells. For example, the pressing tool includes a frame with a hollow area and several rows of pressure pins arranged at the bottom of the frame, and each row of pressure pins corresponds to a solder strip in the solder strip group. When the pressing tool is placed on the previous battery cell 30, each row of pressure pins is pressed on the front film 40 on the corresponding solder strip, thereby pressing the front film 40 and the front half of the solder strip group 20 to the previous battery cell 30. For another example, the pressing tool includes a frame with a hollow area and several pressure plates with flexible pressing bottom surfaces arranged at the bottom of the frame. The pressure plates press the front film 40 and the front half of the solder strip group 20 to the previous battery cell 30 through the flexible pressing bottom surfaces.

[0094] Optionally, the conveying mechanism in the embodiment of the present application also includes a plurality of second suction cups arranged on the second mounting frame 8, the adsorption surface of the second suction cups is lower than the adsorption surface of the magnetic suction component 9, and the second suction cups are used to adsorb the second material located below the first material, and the second material is, for example, a front film.

[0095] Continue to refer Figure 7 and Figure 8 As shown, the optional transport process of the transport mechanism is as follows:

[0096] First, the first suction cup 4 is controlled to suck the battery sheet 30 to be laid.

[0097] Then, the magnetic attraction member 9 is controlled to attract the pressing tool 50 and ensure that the second suction cup passes downward through the pressing tool 50 through the avoidance portion on the pressing tool 50 (such as the hollow area on the frame).

[0098] Next, the second suction cup is controlled to suck the front film 40 .

[0099] Finally, if Figure 8 As shown, the first suction cup 4 places the battery cell 30 to be laid on the welding ribbon group 20 and the back film 10. At the same time, the magnetic suction component 9 and the second suction cup place the front film 40 and the pressing tool 50 on the previous battery cell 30, and the pressing tool 50 presses the front film 40 onto the previous battery cell 30.

[0100] It can be seen that through the cooperation of the first suction cup 4, the magnetic component 9 and the second suction cup, the transport mechanism can achieve the simultaneous laying of battery cells, pressing tooling and front membranes, further improving the battery stringing efficiency.

[0101] Optionally, the second suction cup is a columnar suction cup arranged in the vertical direction. Using a columnar suction cup as the second suction cup can ensure that when the magnetic element 9 absorbs the pressing tool 50, the second suction cup can pass downward through the avoidance portion on the pressing tool 50 and pass downward out of the pressing tool 50.

[0102] Based on the same inventive concept, the embodiment of the present application further provides a transport method, which includes the following steps:

[0103] The i-th cell is sucked in, and at least two side edges of the i-th cell along the width direction are preheated by irradiating light.

[0104] The preheated i-th battery cell is laid on the rear half of the i-th welding ribbon group, wherein the rear half of the i-th welding ribbon group is stacked on the i-th back film, and the front half of the i-th welding ribbon group is stacked on the i-1-th battery cell.

[0105] Among them, i≥2.

[0106] In order to enable those skilled in the art to more clearly understand the implementation process of the transport method of the present application, the following will be combined with Figure 8 , taking i=2 as an example, the transport method in the embodiment of the present application is described by way of example.

[0107] First, the second cell 30 is sucked in, and both side edges of the second cell 30 along the width direction (ie, the two long sides of the cell 30 ) are preheated by irradiation with light.

[0108] Then, if Figure 8 As shown, the preheated second cell 30 is laid on the rear half of the second ribbon group 20, wherein the rear half of the second ribbon group is stacked on the second back film 10, and the front half of the second ribbon group is stacked on the first cell.

[0109] The transport method in the embodiments of the present application heats the two long sides of the cell through light during transport, avoiding contact heating of the cell and thus preventing hidden cracks in the cell. The heated cell is then placed on the laid-out solder ribbon assembly and back film, where it is pre-bonded to the back film, ensuring that the cell is transported forward along with the back film and preventing positional shifting of the cell from the solder ribbon assembly during transport. Furthermore, the long sides of the back film are bonded to the lower surface of the cell, preventing shrinkage and deformation of the back film in the width direction.

[0110] Optionally, while sucking the i-th battery cell, the i-1th pressing tool and the i-1th front film are sucked, wherein the i-1th pressing tool is located above the i-1th front film. While laying the preheated i-th battery cell on the second half of the i-th solder ribbon group, the sucked i-1th front film and the i-1th pressing tool are laid on the first half of the i-th solder ribbon group, so that the i-1th pressing tool presses the i-1th front film and the first half of the i-th solder ribbon group onto the i-1th battery cell.

[0111] Still taking i=2 as an example, while sucking the second battery cell 30, the first pressing tool 50 and the first front film 40 are sucked, wherein the first pressing tool 50 is located above the first front film 40. Figure 8 As shown, while the preheated second battery cell 30 is laid on the rear half of the second solder ribbon group 20, the absorbed first front film 40 and the first pressing tool 50 are laid on the front half of the second solder ribbon group 20, so that the first pressing tool 50 presses the first front film 40 and the front half of the second solder ribbon group 20 onto the first battery cell 30.

[0112] That is to say, the transport method in the embodiment of the present application realizes the simultaneous transport and laying of the i-th battery cell, the i-1-th pressing tool and the i-1-th front film, thereby further improving the battery stringing efficiency.

[0113] Optionally, when the preheated i-th battery cell is laid on the rear half of the i-th welding ribbon group, a preset pressure is applied to the preheated portion of the i-th battery cell (for example, the two long sides of the i-th battery cell) to ensure that the i-th battery cell is firmly bonded to the i-th back film.

[0114] The transport method in the embodiment of the present application can be implemented by the transport device in any of the previous embodiments. Therefore, the optional implementation methods of the transport device in the previous embodiments are also applicable to the transport method in the embodiment of the present application and will not be repeated here.

[0115] Based on the same inventive concept, an embodiment of the present application further provides a battery stringing device, which includes the transport mechanism in any of the above embodiments.

[0116] The battery stringing device in the embodiment of the present application has a conveying mechanism provided with a first heating light source 2 and a second heating light source 3 located on both sides of the first suction cup 4. During the process of conveying and laying the battery cells, the first heating light source 2 and the second heating light source 3 heat the two long sides of the battery cells. In this way, after the heated battery cells are placed on the laid solder ribbon group and the back film, they can be pre-bonded with the back film, thereby ensuring that the battery cells are conveyed forward with the back film, preventing the battery cells from being offset from the solder ribbon group during the conveying process, and avoiding hidden cracks in the battery cells caused by contact heating. In addition, the long sides of the back film are bonded to the lower surface of the battery cells on both sides, thereby preventing the back film from shrinking and deforming in the width direction. The battery stringing device in the embodiment of the present application improves the quality of battery stringing.

[0117] Optionally, the battery stringing equipment in the embodiment of the present application further includes a conveyor line, a back film feeding mechanism, a front film feeding mechanism, a soldering tape feeding mechanism, a back film laying mechanism and a welding mechanism, wherein: the back film feeding mechanism is used to provide the back film, the front film feeding mechanism is used to provide the front film, and the soldering tape feeding mechanism is used to provide the soldering tape group. The back film laying mechanism and the conveying mechanism cooperate with each other to lay the back film, the soldering tape group, the battery cell and the front film on the conveyor line according to the stringing rules, and complete the laying of the battery cell and the soldering tape group in a string. The conveyor line transports the laid battery cell and the soldering tape group to the welding station, and the heating mechanism provided at the welding station heats the film so that the back film and the front film fully release their viscosity after being heated, so as to bond the soldering tape group at the corresponding position to the corresponding battery cell.

[0118] Based on the same inventive concept, an embodiment of the present application further provides a battery stringing method, which includes the following steps:

[0119] Place the i-th back film onto the conveyor line.

[0120] The second half of the i-th solder ribbon group is laid on the i-th back film, and the first half of the i-th solder ribbon group is laid on the i-1-th solar cell.

[0121] The i-1th pressing tool, the i-1th front film and the i-th battery cell are sucked in, and at least the two side edges of the i-th battery cell along the width direction are preheated by light; the i-1th front film and the i-1th pressing tool placed above the i-1th front film are laid on the front half of the i-th welding ribbon group, so that the i-1th pressing tool presses the i-1th front film and the front half of the i-th welding ribbon group onto the i-1th battery cell.

[0122] The preheated ith battery cell is laid on the rear half of the ith welding ribbon group, so that the ith back film is bonded to the ith battery cell.

[0123] The conveyor line is controlled to step forward and place the (i+1)th back film sheet onto the conveyor line.

[0124] Repeat the above laying process to obtain laid battery strings, where i ≥ 2;

[0125] The laid-out battery strings are heated so that the front and rear halves of each welding ribbon group are bonded to the corresponding battery cells.

[0126] The battery stringing method provided by the present application is that before the battery cells are placed on the laid welding ribbon group and the back film, the edges of both sides of the battery cells are pre-heated by light. In this way, after the battery cells are placed on the welding ribbon group and the back film, they can be pre-bonded with the back film, thereby ensuring that the battery cells are transported forward with the back film, preventing the battery cells from being offset from the welding ribbon group during transportation, and avoiding hidden cracks in the battery cells caused by contact heating. In addition, the long sides of the back film are pre-bonded to the lower surface of the battery cells to prevent the back film from shrinking and deforming in the width direction. Therefore, the battery stringing method of the present application ultimately improves the quality of battery stringing.

[0127] The battery stringing method in the embodiment of the present application can be implemented by the battery stringing device in the embodiment of the present application.

[0128] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and that all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, not by the above description in the embodiments. Furthermore, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

Claims

1. A transport mechanism, used in a battery stringing device for connecting battery cells in series, characterized in that: The transport mechanism includes a moving mechanism, a first mounting frame, a first heating light source, a second heating light source and a plurality of first suction cups, wherein: The first mounting frame is connected to a movable component of the moving mechanism, and the moving mechanism is configured to drive the first mounting frame to move horizontally and vertically; Several first suction cups are arranged on the first mounting frame, and the first heating light source and the second heating light source are arranged on the first mounting frame at intervals along the first horizontal direction. The first heating light source and the second heating light source are located on opposite sides of the several first suction cups, and the bottoms of the first heating light source and the second heating light source are both higher than the adsorption end of the first suction cup.

2. The transport mechanism according to claim 1, wherein: The second heating light source has the same structure as the first heating light source; The first heating light source includes a substrate and a heating lamp extending along a second horizontal direction, the substrate is mounted on the bottom of the first mounting frame, and the heating lamp is mounted on the substrate; or, The first heating light source includes a substrate and a plurality of LED lamp beads, wherein the substrate is mounted on the bottom of the first mounting frame, and the plurality of LED lamp beads are spaced apart on the substrate along the second horizontal direction; The second horizontal direction is perpendicular to the first horizontal direction.

3. The transport mechanism according to claim 2, wherein: A heat pipe is connected between the substrate and the first mounting frame.

4. The transport mechanism according to claim 1, wherein: The first mounting frame is a fin plate, or a water cooling pipeline is provided in the first mounting frame.

5. The transport mechanism according to claim 1, wherein: The transport mechanism further includes a first pressing member and a second pressing member, wherein: the first pressing member is disposed close to the first heating light source, and the second pressing member is disposed close to the second heating light source; The pressing ends of the first pressing member and the second pressing member are at the same height and are lower than the bottoms of the first heating light source and the second heating light source.

6. The transport mechanism according to claim 5, wherein: The first pressing member includes a first pressing plate provided on one side of the first heating light source, or a pair of first pressing plates provided on both sides of the first heating light source in the first horizontal direction; The second pressing member includes a second pressing plate provided on one side of the second heating light source, or a second pressing plate provided in pairs on both sides of the second heating light source in the first horizontal direction; A flexible layer is provided on the bottom of the first pressing plate and the second pressing plate.

7. The transport mechanism according to claim 1, wherein: The transport mechanism further includes at least one third heating light source, which is disposed on the first mounting frame and located between the first heating light source and the second heating light source, and the bottom of the third heating light source is higher than the adsorption end of the first suction cup.

8. The transport mechanism according to claim 7, wherein: The third heating light source includes a substrate and a heating lamp extending along the second horizontal direction, wherein the substrate is mounted on the bottom of the first mounting frame, and the heating lamp is mounted on the substrate; or the third heating light source includes a substrate and a plurality of LED lamp beads, wherein the substrate is mounted on the bottom of the first mounting frame, and the plurality of LED lamp beads are spaced apart along the second horizontal direction on the substrate; The second horizontal direction is perpendicular to the first horizontal direction.

9. The transport mechanism according to claim 7, wherein: The transport mechanism further includes a third pressing member, which is disposed corresponding to the third heating light source, and a pressing end of the third pressing member is lower than a bottom of the third heating light source.

10. The transport mechanism according to claim 1, wherein: The first suction cup is mounted on the first mounting frame via a buffer connection member so as to float up and down, or the first suction cup is fixedly mounted on the first mounting frame, and the first suction cup itself is elastic; The first suction cup is a vacuum suction cup or a Bernoulli suction cup.

11. The transport mechanism according to claim 1, wherein: The transport mechanism further includes a second mounting frame and a plurality of magnetic elements, wherein the second mounting frame is connected to the first mounting frame or the movable component of the moving mechanism, and the second mounting frame and the first mounting frame are arranged side by side; The moving mechanism is configured to drive the first mounting frame and the second mounting frame to translate and elevate synchronously; A plurality of magnetic elements are installed at the bottom of the second mounting frame, and the magnetic elements are used to absorb the first material.

12. The transport mechanism according to claim 11, wherein: The transport mechanism further includes a plurality of second suction cups arranged on the second mounting frame, wherein the adsorption surface of the second suction cups is lower than the adsorption surface of the magnetic element, and the second suction cups are used to adsorb the second material located below the first material.

13. The transport mechanism according to claim 12, wherein: The second suction cup is a columnar suction cup arranged in a vertical direction.

14. A battery string device, characterized in that: The battery stringing device includes the transport mechanism according to any one of claims 1 to 13.

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