WO2020020350A1

WO2020020350A1 - Lamination device for preparing electrodes of solar cell

Info

Publication number: WO2020020350A1
Application number: PCT/CN2019/097925
Authority: WO
Inventors: 李辉斌; 孙红霞; 谭军; 蒋奇拯; 王宗发; 叶文超; 季志杰; 周德华
Original assignee: 米亚索乐装备集成（福建）有限公司
Priority date: 2018-07-27
Filing date: 2019-07-26
Publication date: 2020-01-30

Abstract

The present application provides a lamination device, comprising a base, a sliding guide rail movably disposed on the base, a drive mechanism for driving the sliding guide rail, winding units for winding an electrode lead wire into the shape of S, a heating unit for heating the electrode lead wire, and a lamination extrusion wheel for pressing an insulating layer on the electrode lead wire.

Description

Laminating device for manufacturing solar cell electrodes

Related applications

This application requires an application number of September 14, 2018, with the application number CN201821504146.X, with the name "a lamination device for solar electrodes" and an application number of July 27, 2018, with the application number CN201821203248.8, The priority of Chinese patent applications entitled "A Winding Lamination Device for Solar Cells" is hereby incorporated by reference in its entirety.

Technical field

The present disclosure relates to the technical field of photovoltaic power generation, and in particular, to a laminating device for manufacturing a solar cell electrode.

Background technique

Solar cells typically include multiple solar cells. Two adjacent solar battery cells are connected in series to form a battery string through electrodes. The adjacent battery strings are arranged in parallel. Two ends of one battery string are connected to other adjacent battery strings through a bus bar to form a parallel structure.

At present, electrodes are mainly manufactured by a sputtering electrode plating process. However, the sputtering electrode technology requires high technology, harsh environment and high cost.

Summary of the Invention

The embodiments of the present disclosure adopt the following technical solutions:

A laminating device for manufacturing an electrode of a solar cell includes:

A base including a first end and a second end opposite to each other;

A sliding guide is movably disposed on the base;

A driving mechanism provided on the base and connected to the sliding guide;

A plurality of winding units are arranged side by side on the sliding guide along the moving direction of the sliding guide. The plurality of winding units are used to wind the electrode lead into an S shape. Driven by the sliding guide from the first end to the second end of the base;

A heating unit provided on the base for heating the electrode lead; and

A lamination pressing wheel is disposed above the winding unit, and is used for laminating insulation on the heated electrode lead.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present disclosure, and some of the drawings form a part of the present disclosure. In the drawings:

FIG. 1 is a schematic structural diagram of a laminating apparatus provided in Embodiment 1 of the present disclosure; FIG.

FIG. 2 is a schematic view of a lamination effect provided by Embodiment 1 of the present disclosure; FIG.

3 is a schematic structural diagram of a sliding guide provided by Embodiment 1 of the present disclosure;

4 is a schematic diagram of a winding unit provided from Embodiment 1 of the present disclosure moving from a first end to a second end of a base;

5 is a schematic diagram of a winding unit provided from Embodiment 1 of the present disclosure moving from a second end to a first end of a base;

6 is a schematic diagram of a carbon positive electrode and a carbon negative electrode provided in Embodiment 1 of the present disclosure;

7 illustrates a foldable link system during which an electrode lead forms an S-shaped line according to a second embodiment;

8 illustrates a side view of a foldable link system according to a second embodiment;

9 shows a schematic view of a guide rail of a foldable link system with a driving mechanism according to a second embodiment;

10 is a schematic structural diagram of a link head according to the second embodiment;

FIG. 11 shows a schematic diagram of a chain head grasping a wire according to the second embodiment; FIG.

FIG. 12 is a schematic diagram of an electrode made by winding a straight wire into an S-shape and laminating it with insulation using a laminating device of the present disclosure; FIG.

FIG. 13 is a schematic diagram of a laminating apparatus for manufacturing an electrode of a solar cell according to the first embodiment of Example 3. FIG.

detailed description

In order to make the objectives, technical solutions, and advantages of the present disclosure more clear, the technical solutions of the present disclosure will be clearly and completely described in combination with specific embodiments of the present disclosure and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

A related solar cell typically deposits a thin film material on a substrate to form a light absorbing layer sandwiched between electrical contact layers. The front contact layer is a transparent conductive layer for current collection and light enhancement, and the rear contact layer is also a conductive layer. The light absorbing layer is a semiconductor material. Any suitable semiconductor material, such as CIGS, CIS, CdTe, CdS, amorphous silicon, polysilicon, etc. can be used to form the light absorbing layer. A metal wire (also referred to as a top-level stage) for collecting current is disposed on the transparent conductive layer, and the metal wire may have an “S” shape.

Example one

As shown in FIGS. 1 and 2, the lamination device provided by the present disclosure is used to form an electrode 4 of a solar cell by lamination. The electrode 4 includes an electrode lead 41 and an insulating layer 42 pressed on one side of the electrode lead 41. The electrode 4 is attached to the transparent conductive layer by, for example, a lamination method. The electrode lead 41 includes a plurality of horizontal metal wires arranged in parallel, and the two metal wires are connected to form an “S” shape through metal wires to increase the collection of carriers. That is, the electrode lead 41 may be formed on the insulating layer 42. "S" shape arrangement.

As shown in FIGS. 1-5 (where the arrows in FIGS. 3, 4, and 5 indicate the moving direction of the slide rail 2), the laminating device includes a base 1 and a slide rail 2 movably disposed on the base 1. A driving mechanism (not shown) for driving the sliding guide rail 2, a winding unit 3 for winding the electrode lead 41 into an S-shape, a heating unit 5 for heating the electrode lead 41, and an insulation layer 42 pressed on the electrode lead 41 of the laminated extrusion wheel 6. The production of electrodes for solar cells is achieved through the cooperation of various components of a lamination device. The laminating device has lower environmental requirements and can be used in ordinary clean rooms, which can effectively reduce costs.

The front of the base 1 is provided with a platform on which the sliding guide rail 2 is placed. The platform is roughly rectangular. The driving mechanism is fixed on the base 1 and may be, for example, a hydraulic driving mechanism, an air cylinder, or the like.

As shown in FIG. 3, the slide rail 2 may be, for example, a chain slide rail 2 or the like. The slide rail 2 is disposed on the base 1 and is connected to a driving mechanism. The slide rail 2 is driven by the driving mechanism. The slide guide 2 may be an annular slide guide 2 that surrounds from the front of the base 1 to the back of the base 1. The ring slide rail 2 moves in a clockwise direction or a counterclockwise direction. Each winding unit 3 moves clockwise or counterclockwise around the base 1 driven by the sliding guide rail 2. Each winding unit 3 moves from the first end 11 through the front of the base 1 to the second end 12 and then from the second end The end 12 is moved to the first end 11 through the back surface of the base 1 to implement the repeated winding use of the winding unit 3. The front of the base 1 is provided with a channel for receiving the slide rail 2.

The heating unit 5 is fixed on the base 1 for heating the electrode lead 41. The heating unit 5 includes a carbon positive electrode 51 near the first end 11 of the base 1 and a carbon negative electrode 52 near the second end 12 of the base 1. The carbon positive electrode 51 and the carbon negative electrode 52 are located above the electrode lead 41 and can always communicate with the electrode. The lead 41 is in contact with each other. The carbon positive electrode 51, the carbon negative electrode 52, and the electrode lead 41 located between the carbon positive electrode 51 and the carbon negative electrode 52 constitute an electrical circuit. The electrical circuit is used to connect the carbon positive electrode 51 and the carbon negative electrode 52. The intermediate electrode lead 41 is heated.

As shown in FIG. 6, the carbon positive electrode 51 and the carbon negative electrode 52 may be a carbon sheet 54 disposed in the moving block 53, and the carbon sheet 54 is disposed above the electrode lead 41. The lower end of the carbon sheet 54 is in contact with the upper end of the electrode lead 41. The moving block 53 can be moved up and down on the base 1, that is, can be moved in a direction approaching and away from the base 1. Before the winding, when adjusting the laminating device, the distance between the carbon sheet 54 and the electrode lead 41 is adjusted by the moving block 52. As shown in FIG. 1, the moving block 53 is slidably disposed on the upright 50, and the upright 50 is disposed on the edge of the base 1.

The lamination pressing wheel 6 is located between the carbon positive electrode 51 and the carbon negative electrode 52. The lamination pressing wheel 6 is used to apply pressure to the insulating layer 42 and the heated electrode lead 41 so that the electrode lead 41 and the insulating layer 42 are better pressed together. The lamination pressing wheel 6 is provided on the base 1 through an adjustment mechanism 7. The adjustment mechanism 7 is configured to adjust the distance between the lamination pressing wheel 6 and the electrode lead 41 and control the magnitude of the force exerted by the lamination pressing wheel 6.

The adjustment mechanism 7 can be provided in various ways. In one example, the adjustment mechanism 7 includes a guide post 71 provided on the base 1 and provided with a chute, and one end is provided in the chute, and the other end is connected with the laminated extrusion wheel 6 Connected engagement shaft 72. By moving the engaging shaft 72 up and down in the chute, the distance between the lamination pressing wheel 6 and the electrode lead 41 is adjusted, and the magnitude of the force exerted by the lamination pressing wheel 6 is controlled.

Each winding unit 3 has the same shape, and each winding unit 3 is provided with two winding posts 31, and the two winding posts 31 are connected by a connecting block 32. The two winding posts 31 are located on both sides of the sliding guide 2, and the two winding posts 31 are displaced in the extending direction of the sliding guide 2. In this way, the electrode lead 4 can be wound in an S shape around each of the winding posts 31.

Each of the winding posts 31 includes a cylindrical winding post body 311 and a support 312 provided on the sliding guide rail 2 and connected to the winding post body 311. The electrode lead 41 is wound on the winding post body 311. The center distance L between two adjacent bobbin bodies 311 on both sides of the sliding guide rail 2 is equal to the diameter of the main winding body 311, and the center distance L is between the centers of the two bobbin bodies 311 and slides along The distance in the moving direction of the guide rail 2.

Each winding unit 3 winds the electrode lead 41 into an “S” shape, and a plurality of winding units 3 are arranged side by side on the sliding guide 2 along the moving direction of the sliding guide 2, and the electrode lead 41 is wound into a continuous “S” shape. . By setting in the above manner, it is convenient to wind the electrode lead 41 on or off the winding unit 3 during the movement of the winding unit 3. The winding unit 3 may be provided with at least four winding posts 31 and the like.

At this time, there may be a plurality of winding units 3 between the carbon positive electrode 51 and the carbon negative electrode 52, and the electrode leads 41 on the plurality of winding units 3 and the carbon positive and negative electrodes constitute an electrical circuit.

The laminating device further includes a pay-off unit provided on the first end 11 of the base 1 and a take-out unit (not shown in the figure) provided on the second end 12 of the base 1. The winding unit winds the electrode lead 41 on the winding unit 3, and the taking unit removes the electrode lead 41 from the winding unit 3, so that the electrode lead 41 is wound on the winding unit 3 or separated from the winding unit 3. , Reducing the possibility that the electrode lead 41 is torn by the winding unit 3. The pay-off unit and the take-up unit may be specifically a manipulator or a manual operator.

When the solar electrode 4 is manufactured, the first winding unit 3 is moved to the position of the winding unit by the sliding guide rail 2. The winding unit winds the electrode lead 41 on the first winding unit 3, and the first winding unit 3 Driven by the sliding guide rail 2, it continues to move toward the second end 12 of the base 1. Then, the second winding unit 3 next to the first winding unit 3 is moved to the position of the pay-off unit. The pay-off unit winds the electrode lead 41 on the second winding unit 3, and the second winding unit 3 is sliding. Driven by the guide rail 2, it continues to move toward the second end 12 of the base 1. Then, the third winding unit 3 next to the second winding unit 3 is moved to the position of the winding unit. The winding unit winds the electrode lead 41 on the third winding unit 3, and the third winding unit 3 Driven by the slide rail 2, it moves toward the second end 12 of the base 1. The winding units 3 arranged side by side wind the electrode leads 41 in sequence and move toward the second end 12 of the base 1 in sequence.

When the winding unit 3 moves between the carbon positive and negative electrodes 4, the electrode lead 41, the carbon positive electrode 51, and the carbon negative electrode 52 constitute an electrical circuit. The carbon positive electrode 51 and the carbon negative electrode 52 are energized, the electrode lead 41 generates heat, and the temperature rises. Pressure is applied by the lamination pressing wheel 6 to complete the lamination of the electrode lead 41 and the insulating layer 42, and the insulating layer 42 is attached to the high-temperature electrode lead 41.

When the first winding unit 3 moves to the second end 12 of the base 1 and is located at the position of the wire taking unit, the wire taking unit removes the electrode lead 41, and the first winding unit 3 is driven from the base 1 by the sliding guide 2 The second end 12 returns to the first end 11 of the base 1. When the second winding unit 3 moves to the position of the take-up unit, the take-up unit removes the electrode lead 41, and the second winding unit 3 is driven from the second end 12 of the base 1 to the base 1 by the sliding guide 2第一端 11。 The first end 11. When the third winding unit 3 is moved to the position of the wire taking unit, the wire taking unit removes the electrode lead 41, and the third winding unit 3 is driven from the second end 12 of the base 1 to the base 1 by the sliding guide 2第一端 11。 The first end 11. The take-out unit sequentially removes the electrode leads 41 on the winding unit 3 arranged side by side, and then the winding unit 3 moves in sequence toward the first end 11 of the base 1.

Among them, as shown in FIG. 3, when the winding unit 3 moves from the first end 11 to the second end 12 of the base 1, the electrode lead 41 is driven on the front surface of the base 1 from the first end 11 to the second end 12 of the base 1 and The bonding with the insulating layer 42 is completed. When the winding unit 3 moves from the second end 12 to the first end 11 of the base 1 on the back surface of the base 1, the winding unit 3 moves without load, that is, the electrode lead 41 is not wound on the winding unit 3.

At this time, the laminating device further includes a nozzle 8 provided on the second end 12 of the base 1. The nozzle 8 is located below the slide rail 2. The nozzle 8 ejects air toward the slide rail 2. When the winding unit 3 moves to the second end 12 of the base 1 In this case, the possibility of collision between two adjacent winding units 3 is reduced.

The laminating device may further include a control mechanism (not shown in the figure) connected to the driving mechanism, the heating unit 5 and the lamination pressing wheel 6, and the start and stop of each component is controlled by the control mechanism to realize automatic production.

The laminating device of the present disclosure innovatively solves the laminating process of the flexible material electrode 4 and the electrode wire 41; the laminating device can be used in an ordinary clean room, and does not require such high environmental requirements as sputtering; the entire device has high automation , 24 hours of non-stop production, high efficiency; the entire device does not require too high technology of zero firmware, simple operation, low maintenance costs, greatly reducing costs.

Example two

The lamination device provided by the present disclosure is different from that in the first embodiment in the winding unit 3 and the slide rail 2. The sliding guide 2 in this embodiment is a foldable link system. The winding unit (3) is a link head (602) of each link of the link system.

FIG. 7 illustrates a foldable link system during which the electrode lead 41 forms an S-shaped line. The foldable link system has a plurality of link heads 602, and the link heads 602 correspond to the bobbin body 311 in the first embodiment. When the links of the foldable link system are uncollapsed or open, the link heads 602 are spaced apart, for example, arranged in a row. When the links of the foldable link system are in the folded position, the heads 602 of each link are stacked, for example, arranged in left and right columns. In some embodiments, the link head 602 includes a joint member configured to engage an un-S-shaped wire, and the link head 602 is configured such that when the link is folded, the wire passes through the link in an S-shaped or serpentine configuration The joint member of the head 602.

The electrode lead 41 shown in the upper part of FIG. 7 is unshaped and usually straight, for example, the electrode lead 41 is a straight wire that has been separated from the bobbin. In the upper part of FIG. 7, the link head 602 (for example, a bonding member of the link head 602) is bonded to the electrode lead 41. In the middle of FIG. 7, when the chain link collapses, the adjacent chain link heads 602 are far away from each other, the chain link heads 602 alternate in a state of being stacked and not contracted, and the electrode lead 41 has a serpentine structure. In the lower part of FIG. 7, the link is in a folded state. At this time, the link head 602 forms two left and right stacks. At this time, the electrode lead 41 is S-shaped, which is consistent with the design shape in the electrode 4.

Figure 8 shows a side view of a foldable link system. The chain link includes a link head 602, a link 612, and a link foot 614 in an uncontracted state. The link head 602 is bonded to the electrode lead 41. In some embodiments, the link 612 is connected by one or more swing arms 616. In the illustrated embodiment, two swing arms 616 connect adjacent chain links. The swing arms 616 of adjacent chain links can pivot in opposite directions around the connecting link 612, allowing the chain links to collapse. Adjacent link heads 602 are far away from each other, forming two left and right stacks as shown in the bottom of FIG. 7. At this time, the electrode lead 41 is S-shaped. Referring to FIG. 1, the S-shaped electrode lead 41 is heated under the action of the heating unit 5, and then the electrode lead 41 and the insulating layer 42 are pressed together by a lamination pressing wheel 6. Then, the link head 602 is separated from the S-shaped electrode lead 41, and the insulating layer 42 to which the electrode lead 41 is pressed is transferred away, and can be subsequently adhered to the transparent conductive layer of the solar cell. The unloaded link head 602 continues to transfer, the links of the foldable link system are opened during the transfer, and the swing arm 616 is restored to the state shown in FIG. 8. The unloaded link heads 602 are close to each other and arranged in a row at intervals, and the state shown in FIG. 7 is subsequently repeated.

In the embodiment shown in FIG. 8, two swing arms 616 connect adjacent chain links.

As shown in FIG. 9, the foldable link system also includes an upper drum 802, a lower drum 804, a belt 806, and a rail assembly 808. The upper drum 802 and the lower drum 804 rotate, and the driving belt 806 and a chain (slide rail 2, not shown in FIG. 9) around the drum are moved. The V-shaped groove 810 on the upper drum 802 receives and aligns the link head 602 so that the link head 602 can engage an unwound straight wire. The rail assembly 808 includes a channel 807 through which the chain extends to guide the chain links and link heads 602 when the chain is folded and reopened. The folding and reopening of the chain can be referred to the related description herein and shown in FIG. 7 and FIG. 8.

In some embodiments, the link head 602 includes a bonding member that grasps the lead wire (for the electrode lead 41 wound in an S shape) at the twelve o'clock position of the upper drum 802. In some embodiments, the engagement member is opened at a position before the 12 o'clock position to grasp the line and then closed to engage the line.

FIG. 10 shows the link head 602 in the open position. The link head 602 is connected to a link 612 (not shown in FIG. 10) at a connection point 913, and may be configured such that the side 920 is upwardly drummed. Two

engagement members

902 and 904 cage the wire in the area 903. The engagement member 902 includes an L-shaped tip configured to fit on a post of the engagement member 904. In some embodiments, the post of the engagement member 904 includes a notch configured to receive a portion of the tip of the engagement member 902.

The link head 602 has an activation member 905 that includes two

activatable surfaces

906 and 908 that are symmetrical about a pivot point 909. The engagement member 902 is movably connected to the activation member 905. The engagement member 904 may be connected to or become a part of the activation member 905. By applying a force to the

activatable surface

906 or 908, the link head 602 can be moved to the open position. When the link head 602 is moved to the open position, the link head 602 is allowed to release the wire regardless of whether the link head 602 is oriented such that the side 920 faces the upward drum 802. Among the above-mentioned members in the open position, the engagement member 902 and the member 904 are moved away from each other to allow the wire to be inserted or removed. Once the force on the activatable member is removed, the spring 917 returns the link head 602 to the closed position. The activation member 905 includes a cylindrical sleeve 915 that provides a surface in contact with the side rail channel. The cylindrical sleeve is made of a polymer material with a low coefficient of friction.

A similar cylindrical sleeve is provided around the rest of the chain link to facilitate rapid movement along the track.

As shown in FIG. 11, the upper drum assembly includes a cam bracket, a cam guide 1206, and a V-shaped groove. When each link head 602 rotates around the top of the drum, each link head 602 fits into a V-shaped groove 810. Previously, the fixed cam guide 1206 mounted on the cam bracket activated the gripper to activate the active surface of each chain head facing the upwardly facing drum assembly.

The cam bracket is located outside the cam guide 1206 and the upper drum assembly. The cam rail 1206 is mounted on a cam bracket such that it faces the rotating upper drum plate. The cam bracket and the cam guide 1206 are centered on a central axis, and the central axis does not rotate. The cam guide 1206 is stationary when the upper drum rotates, and is irregularly shaped to force the link to open as the link rotates through the link opening area.

As shown in FIG. 11, in some embodiments, the link heads 1202 a-1202 c in the alignment V-shaped groove 1210 are provided with a gripper 1208. The link heads 1202a and 1202c are oriented in the same direction and eventually collapse to be stacked together, and the link heads 1202b are oriented in the opposite direction and will be used as part of another stack. In this way, the wires can form an S-shaped electrode lead 41. As shown in FIGS. 10 and 11, regardless of the orientation of the link heads, the activatable surface of each link head 1202a-1202c faces its respective gripper 1208. The gripper 1208 is in contact with the cam follower 1212. When the upper drum, the grabber 1208, and the cam follower 1212 rotate, the cam follower 1212 follows the fixed cam rail 1206. Before the 12 o'clock position, the cam guide 1206 is shaped to force the cam follower 1212 upward, and force the gripper 1208 to slide the linear guide 1218 upward (as shown in FIG. 11). In this position, the gripper 1208 presses the activation surface of the link head, opening the engaging member of the link head to receive the wire at the 12 o'clock position. The cam guide 1206 causes the linear slider 1218 of the gripper 1208 to slide down to the original position immediately after receiving the wire. The engaging member is closed around the wire and locks the wire. The winding unit in this embodiment can automatically grasp straight wires and form an S-shape during the process of transferring to a laminating device, so as to be pressed to the insulating layer 42 at the laminating device. In some embodiments, an insulating layer 42 transfer device is also provided in or near the laminating device, and the device can synchronously transfer the insulating layer 42 above or below the S-shaped electrode lead 41 and the electrode lead 41 .

FIG. 12 shows an electrode 4 made by winding a straight wire into an S shape and pressing it with an insulating layer 42 using the laminating device of this embodiment.

Example three

The first embodiment of the present embodiment relates to a laminating device 100 for making electrodes of a solar cell, and is configured to press a metal grid line 41 extending back and forth along a first direction X onto an insulating layer 42 (not shown) As shown in Figure 13, including:

An electrode 511 for electrically connecting with the metal grid line 41 and a lamination pressing wheel 6 for pressing the metal grid line 41 onto the insulating layer 42. The electrode 511 is a columnar electrode, and the axis of the columnar electrode 511 is in the first direction. X is parallel.

In this embodiment, the electrode 511 is provided in a columnar shape. Since the metal grid line 41 extends back and forth along the first direction X to form a plurality of linear portions, and the axis of the columnar electrode 511 is parallel to the direction in which the metal grid line 41 extends back and forth, thereby ensuring the columnar shape. The side of the electrode 511 can be connected to the entire straight portion, that is, the contact form between the electrode 511 and the metal grid line 41 is improved from a "point-to-point" contact to a "line-to-line" contact, thereby increasing the electrode 511 and metal. The contact area between the gate lines 41 enables the metal gate lines 41 to be in contact with the electrodes 511 during the entire lamination process, that is, the metal gate lines 41 have a stable current through the entire lamination process, avoiding the existing In the technology, "the poor contact between the metal grid line 41 and the electrode 511 causes the metal grid line 41 to be overlaid or overlaid, and burns through the insulating layer 42, and the metal grid line 41 is burned out, which can save materials. Cost, increase the yield of solar cell products. If the phenomenon of burning through the insulation layer 42 and the metal grid line 41 is frequent, the equipment will be shut down frequently, the product will be severely scrapped, and material waste will be serious. , Reduces the product yield of solar cells.

The implementation details of the winding and laminating device for a solar cell according to this embodiment will be specifically described below. The following content is only for easy understanding of the implementation details provided, and is not necessary to implement this solution.

In this embodiment, the winding lamination device further includes a supporting portion for supporting the insulating layer 42, and the columnar electrode 511 and the lamination pressing wheel 6 are located above the supporting portion, respectively. This arrangement prevents the insulating layer 42 from generating relative displacement during the working process of the winding lamination device, and improves the stability of the winding lamination device.

Specifically, the bearing portion includes a bearing surface facing the columnar electrode 511. The bearing surface includes a bearing region 501 for bearing the insulating layer 42 and a non-bearing region 502 adjacent to the bearing region 501. The lamination extrusion wheel 6 is located in the bearing region 501. Inside.

It should be noted that, in this embodiment, the orthographic projection of the columnar electrode 511 on the bearing surface is located in the non-bearing region 502. It can be understood that the width of the rectangular-like structure formed by the reciprocating extension of the metal grid line 41 is greater than the width of the insulating layer 42. The laminated extrusion wheel 6 is set on the area of the rectangular-like structure facing the insulating layer 42 and The columnar electrode 511 is disposed on an area of the rectangular-shaped structure that is not directly opposite the insulating layer 42, so that the columnar electrode 511 is far away from the laminated extrusion wheel 6.

The winding and laminating device 100 further includes a plurality of chain heads 6 for winding the metal grid wire 41. The plurality of chain heads 6 are respectively located on both sides of the bearing portion in the first direction X, and the chain heads 6 on each side are perpendicular to each other. The second direction Y in the first direction X is arranged at intervals. By additionally setting the chain head 6 to fix the extending direction of the metal grid line 41, on the one hand, the winding of the metal grid line 41 becomes easier, and only a plurality of chain heads 6 are passed in order to form a predetermined structure; another On the one hand, the structure formed after the winding of the metal grid lines 41 is more stable under the fixing of the chain head, is not easily deformed, and the lamination accuracy is improved.

In some embodiments, the columnar electrode 511 is cylindrical. The columnar electrode 511 with such a structure can rotate relative to the metal grid line 41 and the insulating layer 42. During the working process of the winding and laminating device 100, the friction between the rotating cylindrical electrode 511 and the metal grid line 41 is Compared with the cylindrical electrode 511 which does not rotate and cause sliding friction with the metal grid line 41, the rolling friction is smaller due to the friction generated by the rotation of the cylindrical electrode 511, and it is not easy to cause the metal grid line 41 to break, so it is further improved. Product yield of solar cells.

The material of the columnar electrode may be copper or graphite. Copper has good ductility, high thermal conductivity and electrical conductivity, so it is the most commonly used material in cables and electrical and electronic components. The advantages of graphite electrodes are easier processing, high removal rate of electrical discharge processing, and small graphite loss.

In some embodiments, the columnar electrode is a copper-doped graphite electrode. Since the electrode material is changed from graphite to copper (doped with a small amount of graphite), its conductivity becomes stable, and its thermal conductivity and heat dissipation are relatively good, eliminating the phenomenon of ignition caused by poor contact with the metal grid line 41. The problem of disconnection defects is fundamentally solved.

To facilitate understanding, specific implementation details of the winding lamination device 100 provided in this embodiment are described in detail below:

The metal grid line passes through the chain head and is laid on the insulation layer 42 along the fixed track along with the movement of the chain; when the metal grid line passes between the two moving electrodes, the metal grid line and the electrode 511 are formed between the two moving electrodes. Circuit, when the current flows on the metal grid line, heat is generated, and at the same time, the viscous substance on the surface of the insulating layer 42 is melted. Fused together and firmly laminated on the insulating layer 42. In this process, the electrode changed from a sheet to a column, which increased the contact surface and contact frequency between the copper wire and the electrode. The current through the copper wire remained stable, avoiding melting or failure to stick due to current instability during lamination. The phenomenon.

The second embodiment of the present invention provides another winding lamination device. The second embodiment is substantially the same as the first embodiment, and the main difference is that in the first embodiment, the orthographic projection of the columnar electrode 511 on the bearing surface is located in the non-bearing region 502. In the second embodiment of the present invention, the orthographic projection of the columnar electrode 511 on the bearing surface is located in the bearing region 501 and the non-bearing region 502. Those skilled in the art can understand that this embodiment can achieve the same technical effects as the first embodiment.

In some embodiments, the columnar electrode 511 is extended relative to the first embodiment, and the orthographic projection of the columnar electrode 511 on the bearing surface extends from the non-bearing region 502 to the bearing region 501.

The above are only examples of the present disclosure and are not intended to limit the present disclosure. It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present disclosure shall be included in the scope of claims of the present disclosure.

Claims

A laminating device for manufacturing an electrode of a solar cell, comprising:

The base (1) includes a first end (11) and a second end (12) opposite to each other;

A sliding guide (2) is movably arranged on the base (1);

A driving mechanism is provided on the base (1) and is connected to the sliding guide (2);

A plurality of winding units (3) are arranged side by side on the sliding guide (2) along the moving direction of the sliding guide (2), and the plurality of winding units (3) are used to wire the electrode lead (41) Wound into an S shape, the plurality of winding units (3) are moved from the first end (11) to the second end (12) of the base (1) by the sliding guide (2);

A heating unit (5) provided on the base (1) for heating the electrode lead (41); and

A lamination pressing wheel (6) is disposed above the winding unit (3), and is used to press an insulating layer (42) on the heated electrode lead (41).
The laminating device according to claim 1, wherein the sliding guide (2) is an annular sliding guide (2) that surrounds from the front to the back of the base (1), and the winding unit (3) ) Is moved around the base (1) between a first end (11) and a second end (12) of the base (1), wherein the winding unit (3) is removed from the base (1) The second end (12) moves to the first end (11) with no load.
The laminating device according to claim 2, further comprising a nozzle (8) provided at the second end (12) of the base (1), the nozzle (8) being located on the sliding guide ( 2), the nozzle (8) faces the slide rail (2).
The laminating device according to claim 1, wherein the heating unit (5) includes an electrode for electrically connecting with the electrode lead (41), the electrode is a columnar electrode, and the The axis is perpendicular to the extending direction of the sliding guide (2).
The laminating device according to claim 4, wherein the columnar electrode is cylindrical.
The laminating device according to claim 4, wherein the material of the columnar electrode is a copper electrode, a graphite electrode, or a copper-doped graphite electrode.
The laminating device according to claim 1, characterized in that the heating unit (5) comprises a carbon positive electrode (51) near the first end (11) of the base (1) and near the base (1) ) A carbon negative electrode (52) at the second end (12), the carbon positive electrode (51) and the carbon negative electrode (52) are located above the electrode lead (41), and the laminated extrusion wheel (6) Correspondingly located between the carbon positive electrode (51) and the carbon negative electrode (52).
The laminating device according to claim 7, characterized in that each of the carbon positive electrode (51) and the carbon negative electrode (52) includes a carbon sheet (54) in contact with the electrode lead (41) and A moving block (53) provided on the base (1), the carbon sheet (54) is provided on the moving block (53), and the moving block (53) is used to adjust the carbon sheet (54) ) And the electrode lead (41).
The laminating device according to claim 1, characterized in that the laminating pressing wheel (6) is arranged on the base (1) through an adjusting mechanism (7), and the adjusting mechanism (7) is used for Adjust the distance between the lamination pressing wheel (6) and the electrode lead (41).
The laminating device according to claim 9, characterized in that the adjustment mechanism (7) comprises a guide post (71) provided with a chute and an engaging shaft (72) provided at one end of the chute, wherein A guide post (71) is disposed on the base (1), and the other end of the engagement shaft (72) is connected to the laminated extrusion wheel (6).
The laminating device according to any one of claims 1 to 10, characterized in that each of the winding units (3) is provided with two winding posts (31), and the two winding posts (31) 31) is located on both sides of the sliding guide (2), and the two winding posts (31) are displaced along the extending direction of the sliding guide (2).
The laminating device according to claim 8, characterized in that each of the winding posts (31) comprises a cylindrical winding post body (311) and is provided on the sliding guide (2) and connected to the winding post body (311). The support body (312) of the bobbin body (311), and the electrode lead (41) is wound on the bobbin body (311).

The heating unit (5) includes an electrode for electrically connecting with the electrode lead (41), the electrode is a columnar electrode, and an axis of the columnar electrode is parallel to the first direction.
The laminating device according to any one of claims 1 to 10, wherein the laminating device further comprises a driving mechanism, the heating unit (5), and the laminating pressing wheel ( 6) Connected control mechanism.
The laminating device according to any one of claims 1 to 10, characterized in that the laminating device further comprises a pay-off unit provided at the first end (11) of the base (1), and The wire taking unit of the second end (12) of the base (1), the wire taking unit winding the electrode lead (41) around the wire winding unit (3), and the wire taking unit winding the electrode lead (41) Remove from the winding unit (3).
The laminating device according to claim 1, characterized in that the sliding guide (2) includes a link system that is foldable during the formation of an S-shaped wire by the electrode lead (41), and the winding unit (3) A link head of each link of the link system (602);

The link system is configured: when the links of the foldable link system are in an unfolded or opened state, the link heads (602) are spaced apart and arranged in a row; when the links of the foldable link system are in In the folded position, the heads of the links (602) are staggered in two rows;

The link heads (602) of the link system are configured to join wires from a wire feeding device, wherein adjacent link heads (602) are joined to opposite sides of the wires so that when the link is folded, the wires The serpentine structure passes through the joint member of the link head (602) to form an electrode lead (41) of an S-shaped wire;

The link system further includes a guide rail assembly configured to guide the links of the chain when the chain is folded and reopened, and is also configured to release the formed S-shaped electrode lead (602) from the link head (602). 41), wherein each of the link heads (602) includes two engaging members that are movable between an open position and a closed position, wherein the two engaging members in the closed position define a wire restraint region.
The laminating device according to claim 15, characterized in that each link head (602) includes two activation surfaces symmetrical about a pivot point, wherein a force applied to any one of the activation surfaces can be Operated to move the engagement member to the open position.
The laminating apparatus according to claim 15, wherein the link heads (602) are arranged in an alternating direction.
The laminating apparatus according to claim 15, wherein the sliding guide (2) further comprises a rotatable upper drum assembly and a lower drum assembly, and a chain rotates around the upper drum assembly and the lower drum assembly.
The laminating device according to claim 18, the upper drum assembly includes a V-shaped groove (810) configured to receive and align the link head (602).
The laminating device according to claim 19, wherein the upper drum assembly further comprises a fixed cam guide and a gripper, the gripper being configured to activate a chain in a V-shaped groove (810) A joint head (602) to move the engagement member to an open position.
The laminating device according to claim 15, wherein the guide rail assembly includes a bifurcation channel, the bifurcation channel includes two sub-channels (807), each sub-channel (807) is configured to guide a stack of chain links Head (602).
The laminating device according to claim 21, wherein the guide rail assembly further comprises a link head expander disposed between the two sub-channels (807) for stacking two rows of link heads The link heads of each of them are arranged in a straight line.
The laminating device according to claim 15, wherein the guide rail assembly further includes two cam assemblies, and the two dual cam assemblies are configured to open the folded link head (602) to release the S-shape Electrode lead (41).
The laminating device according to claim 15, wherein the links of the link system each include a link head (602), a connecting rod (612) and a link foot (614) connected in sequence, adjacent to each other. The connecting rods (612) of the chain links are connected by one or more swing arms (616), and the swing arms (616) of adjacent chain links can be pivoted in opposite directions around the connecting links (612) thereof, thereby allowing The chain link of the link system is folded.