CN213546332U

CN213546332U - Tile stacking assembly and tile stacking assembly production line

Info

Publication number: CN213546332U
Application number: CN202023141878.7U
Authority: CN
Inventors: 张磊
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-06-25
Anticipated expiration: 2030-12-23

Abstract

The utility model provides a stack assembly and stack assembly production line, wherein the stack assembly that relates includes the battery cluster, the battery cluster has a plurality of battery pieces that connect with the mode of stacking tiles, the stack assembly still possesses the busbar that sets up in the battery cluster back, the back of at least one battery piece is provided with the pad of electric connection to the busbar, still be provided with the tin cream layer between busbar and the corresponding pad; the utility model provides an among the stack tile subassembly, because the setting on tin cream layer, can effectively compensate the sunken drop of battery piece back pad position department among the prior art for have between pad and the busbar more reliable be connected.

Description

Tile stacking assembly and tile stacking assembly production line

Technical Field

The utility model relates to a photovoltaic field of making especially relates to a stack of tiles subassembly and stack of tiles subassembly production line.

Background

The laminated assembly is a high-efficiency assembly popular in the photovoltaic industry and is different from the traditional manufacturing process, the laminated assembly is used for slicing the cell pieces and connecting the cell pieces into a cell string through special conductive adhesive, the solar cell pieces are closely arranged in a series-parallel connection structure by the assembly, no gap is formed between the front cell piece and the rear cell piece, and the internal loss caused by the connection of the interconnection strips with the cell pieces is reduced; and more than 13% of battery plates in the same module area can be placed in the module, so that the photoelectric conversion power of the module is greatly increased.

In the prior art, based on the assembly requirement of the laminated assembly, bus bars need to be arranged on the back surfaces of some selected cell sheets, the back surfaces of the selected cell sheets have back electric fields and pads for welding with the corresponding bus bars, and since the pads are formed before the back electric fields, and the back electric fields need to be lapped to the pads, the areas where the pads are located are recessed (usually, the recesses are 15-20 μm) relative to the back electric fields. Due to the concave drop height, the bus bar is prone to poor phenomena such as cold joint and desoldering when being directly welded to the bonding pad of the battery piece.

In view of the above, there is a need to provide an improved solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that prior art exists at least, for realizing the above-mentioned utility model purpose, the utility model provides a shingle subassembly, its concrete design mode as follows.

The utility model provides a shingle assembly, includes the battery cluster, the battery cluster has a plurality of battery pieces that connect with the shingle mode, shingle assembly still utensil set up in the busbar at the battery cluster back, at least one the back of battery piece is provided with electric connection to the pad of busbar, the busbar with corresponding still be provided with the tin cream layer between the pad.

Further, the back of the battery piece is provided with a back electric field, one side of the solder paste layer departing from the battery piece and one side of the back electric field close to the bus bar are located on the same plane, or one side of the solder paste layer departing from the battery piece protrudes and exceeds the plane where one side of the back electric field close to the bus bar is located.

Furthermore, the battery piece is long-strip-shaped, the length direction of the battery piece is perpendicular to the length direction of the battery string where the battery piece is located, and a plurality of welding discs arranged on the back face of the battery piece are arranged at intervals along the length direction of the battery piece.

Further, the area of the solder paste layer is not larger than the area of the corresponding bonding pad.

Further, the back of the battery piece is provided with a silver electrode, and the welding pad forms at least one part of the silver electrode.

Further, the battery piece is a PERC battery.

The utility model also discloses a stack assembly production line, it includes the row's string device that is used for assembling the lamination device of battery string into with the battery piece and is used for arranging the battery string according to setting for the rule, stack assembly production line still have set up in the lamination device with arrange and string the some tin cream device that is used for carrying out some tin cream to the back pad position department of selecting the battery piece between the device.

Furthermore, the solder paste dispensing device is provided with an induction probe for inducing the position of a battery piece to be solder paste dispensed in the battery string and a solder paste head for positioning solder paste on a bonding pad of the battery piece to be solder paste dispensed according to an induction signal of the induction probe.

Further, the laminated assembly production line is provided with a conveyor belt for conveying the battery string, the conveyor belt is provided with a solder paste dispensing section conveyor belt which is matched with the solder paste dispensing device and is independent of other positions of the conveyor belt, and the solder paste dispensing section conveyor belt is provided with a first state for conveying the battery string along the length direction of the battery string and a second state for keeping the battery string static for the solder paste dispensing device to dispense solder paste.

Further, the shingle assembly production line further comprises: the scribing device, the screen printing device and the splitting device are positioned at the front end of the laminating device and are sequentially arranged in front of and behind the laminating device, the detection device is positioned between the solder paste dispensing device and the string arranging device and is used for detecting the battery strings, and the laminating device is positioned at the rear end of the string arranging device; the lamination device comprises a lamination unit for realizing the tiling arrangement of the battery pieces and a curing unit for curing and connecting the tiled battery pieces to form a battery string.

The utility model has the advantages that: the utility model provides an among the stack tile subassembly, because the setting on tin cream layer, can effectively compensate the sunken drop of battery piece back pad position department among the prior art for have between pad and the busbar more reliable be connected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic back plan view of a battery string according to the present invention;

fig. 2 is a schematic diagram illustrating a process of connecting two adjacent battery strings by a bus bar;

FIG. 3 is a schematic view showing the state before and after the bus bar is connected to the solder paste layer on the pad;

FIG. 4 is a schematic view of the overall frame of the production line of the tile stacking assembly of the present invention;

FIG. 5 is a schematic view of the solder paste dispensing apparatus engaged with a conveyor belt.

In the drawing, 10 is a battery string, 100 is a battery piece, 11 is a bonding pad, 12 is a back electric field, 200 is a solder paste layer, 300 is a bus bar, 41 is a front conveyor belt, 42 is a solder paste dispensing conveyor belt, 43 is a rear conveyor belt, 51 is an induction probe, and 52 is a solder paste head.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The present invention relates to a laminated assembly comprising a battery string 10, and referring to fig. 1, the battery string 10 has a plurality of battery pieces 100 connected in a laminated manner. It will be appreciated that in a particular stack assembly, which includes a plurality of battery strings 10 arranged in series and parallel, only the general structure of one battery string 10 is shown in fig. 1.

As further shown in fig. 2 and 3, in the present invention, the laminated assembly further includes a bus bar 300 disposed on the back surface of the battery string, and the back surface of at least one battery piece 100 is provided with a pad 11 electrically connected to the bus bar 300. As shown in the drawing, the bus bar 300 is used to realize the connection between the adjacent two battery strings 10.

In the present invention, referring to fig. 2 and 3, a solder paste layer 200 is further provided between the bus bar 300 and the corresponding pad 11. As shown in fig. 1, the back surface of each of the battery sheets 100 constituting the battery string 10 is provided with a land 11; it is understood that in other embodiments of the present invention, only the back surface of the battery cell 100, which is directly electrically connected to the bus bar 300, is provided with the pad 11.

It can be understood that the utility model provides an among the shingle assembly, because the setting of tin cream layer 200, can effectively compensate the sunken drop of battery piece back pad position department among the prior art for have more reliable being connected between pad 11 and the busbar 300.

Referring to fig. 2 and 3, the back surface of the battery cell 100 is provided with a back electric field 12. Preferably, in some embodiments of the present invention, a side of the solder paste layer 200 facing away from the battery piece 100 and a side of the back electric field 12 close to the bus bar 300 are located on the same plane, that is, the solder paste layer 200 just fills the concave drop where the solder pad 11 is located. Further, in other preferred embodiments of the present invention, one side of the solder paste layer 200, which is away from the battery piece 100, protrudes beyond the plane of one side of the back electric field 12, which is close to the bus bar 300, that is, the thickness of the solder paste layer 200 is greater than the concave drop of the position of the pad 11, so that the solder paste layer 200 and the bus bar 300 form the most stable welding relationship when forming the laminated assembly.

As some embodiments of the present invention, as shown in the figure, the battery sheet 100 constituting the battery string 10 is in a long strip shape, and the length direction thereof is perpendicular to the length direction of the battery string 10 where the battery sheet is located, a plurality of pads 11 disposed on the back surface of the battery sheet 100 are disposed along the length direction of the battery sheet 100 at intervals, each pad 11 is provided with a solder paste layer 200, and the bus bar 300 is connected to the corresponding pad 11 through the solder paste layer 200.

As a further preference, in the implementation, as shown with reference to fig. 3, the area of the solder paste layer 200 is not larger than the area of the corresponding pad 11. It can be easily understood that since the bus bar 300 forms a certain compression on the solder paste layer 200 when being mated with the solder paste layer 200, the area of the solder paste layer 200 before being mated with the bus bar 300 is smaller than the area of the solder paste layer 200 after being mated with the bus bar 300, and for a laminated assembly, the area of the solder paste layer 200 refers to the area of the solder paste layer 200 after being mated with the bus bar 300. Based on this setting, can the maximum use amount of saving tin cream layer 200, when the stack tile subassembly is two-sided subassembly moreover, can make the stack tile subassembly have better back outward appearance.

Further, the back surface of the battery piece 100 according to the present invention is provided with a silver electrode, wherein the pad 11 constitutes at least a part of the silver electrode. It is understood that the silver electrode may further include an edge main grid disposed at an edge position of the cell 100 for connecting the edge main grid with an adjacent cell in a shingled manner. Of course, in other embodiments of the present invention, the edge main grid may be formed of silver-aluminum grid lines, and the silver electrode includes only the pad 11.

Further, the battery piece that relates to in the utility model is PERC battery.

In addition, in order to realize the preparation production of above-mentioned shingled battery, the utility model also provides a shingled assembly production line, it is shown with reference to fig. 4, shingled assembly production line includes the row's of being used for assembling into battery string 10 with battery piece 100 the lamination device and being used for arranging battery string 10 according to setting for the rule and concatenating the device, and shingled assembly production line still has and sets up and to carry out some tin cream device of some tin cream to the back pad position department of selecting battery piece 100 between lamination device and the row's of concatenating the device.

To folding the tile subassembly, its final dimension will be far more than the size of battery cluster 10, the utility model discloses in, some tin cream device sets up before arranging the cluster device, and not set up after arranging the cluster device, be equivalent to some tin cream action promptly and operate single cluster battery cluster 10, so can be in order to realize some tin cream operation in less space.

As further shown in fig. 5, in an embodiment, the solder paste dispensing apparatus has an inductive probe 51 for sensing the position of the battery piece 100 to be solder-dispensed in the battery string 10 and a solder paste head 52 for dispensing solder paste on the solder pad 11 of the battery piece 100 to be solder-dispensed according to the signal sensed by the inductive probe 51.

In a specific implementation process, the related sensing probe 51 may be an infrared probe, the infrared probe senses the edge of the battery string 10, and then the position of the battery piece 100 to be solder-pasted may be obtained according to the size of the battery string 10, the size of the battery piece 100, the overlapping width during the tiling setting, and other parameters, so that the solder-pasting operation may be performed according to the relative position of the bonding pad 11 with respect to the battery piece 100 where the bonding pad is located.

Further, the utility model discloses a shingled assembly production line has the conveyer belt of conveying battery cluster 10, and it is shown with reference to fig. 5, the conveyer belt have with some tin cream device complex some tin cream section conveyer belt 42, at the concrete implementation in-process, the conveyer belt still has the anterior segment conveyer belt 41 that is located some tin cream section conveyer belt 42 front end and is located the back end conveyer belt 43 of some tin cream section conveyer belt 42 rear end. In the present embodiment, the solder paste dispensing segment conveyor 42 runs independently of the front conveyor 41 and the rear conveyor 43, and has a first state of conveying the battery string 10 along the length direction of the battery string 10 and a second state of keeping the battery string 10 stationary for the solder paste dispensing device to dispense solder paste. It can be understood that the solder paste dispensing segment conveying belt 42 operates independently of the front section conveying belt 41 and the rear section conveying belt 43, that is, the solder paste dispensing segment conveying belt 42 can perform the conveying action or stop the conveying action when the front section conveying belt 41 and the rear section conveying belt 43 operate.

The utility model relates to a stack assembly production line is full-automatic production line, as shown in FIG. 4, stack assembly production line still includes: the scribing device, the screen printing device and the splitting device are positioned at the front end of the laminating device and are sequentially arranged in front of and behind the laminating device, the detection device is positioned between the solder paste dispensing device and the string arranging device and is used for detecting the battery strings, and the laminating device is positioned at the rear end of the string arranging device; the lamination device comprises a lamination unit for realizing the tiling arrangement of the battery pieces and a curing unit for performing curing connection on the tiled battery pieces to form a battery string.

The scribing device is used for scribing the silicon wafer forming the whole solar cell to form a groove for later-stage scribing, and generally adopts laser to scribe; the screen printing device is used for printing the metal conductive paste to form a whole solar cell; the splitting device is used for splitting the whole solar cell along the groove formed during scribing so as to form a split cell, namely the cell 100 related in the utility model; the detection device is used for detecting the battery string 10 after the point soldering paste, generally comprises a manipulator for turning over the battery string, and specifically refers to the prior art; the laminating device is used for realizing the laminating operation of the battery strings after the battery strings are arranged, and the final forming of the laminated assembly is realized.

Referring to fig. 5, in this embodiment, the front conveyor belt segment 41 cooperates with the curing unit for conveying the battery string 10 after the curing unit is cured, and the rear conveyor belt segment 43 cooperates with the detection device to convey the battery string 10 to be detected.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a stack tile subassembly, includes the battery cluster, the battery cluster has a plurality of battery pieces that connect with the mode of tiling, its characterized in that, stack tile subassembly still utensil set up in the busbar at the battery cluster back, at least one the back of battery piece is provided with electric connection to the pad of busbar, busbar and corresponding still be provided with the tin cream layer between the pad.

2. The laminated tile assembly of claim 1, wherein the back surface of the cell is provided with a back electric field, and one side of the solder paste layer facing away from the cell and one side of the back electric field close to the bus bar are located on the same plane, or one side of the solder paste layer facing away from the cell protrudes beyond the plane of one side of the back electric field close to the bus bar.

3. The stack assembly according to claim 1 or 2, wherein the battery plate is in an elongated shape, the length direction of the battery plate is perpendicular to the length direction of the battery string, and the plurality of pads disposed on the back surface of the battery plate are disposed at intervals along the length direction of the battery plate.

4. A stack assembly according to claim 1 or 2, wherein the area of the layer of solder paste is not greater than the area of the respective pad.

5. A stack assembly according to claim 1 or 2, wherein the back side of the cell sheet is provided with a silver electrode, the soldering pads constituting at least a part of the silver electrode.

6. The stack assembly of claim 1 or 2, wherein the battery cells are PERC batteries.

7. A tile-stacking assembly production line comprises a stacking device and a string arranging device, wherein the stacking device is used for assembling battery pieces into a battery string, the string arranging device is used for arranging the battery string according to a set rule, and the tile-stacking assembly production line is further provided with a solder paste applying device which is arranged between the stacking device and the string arranging device and is used for applying solder paste to the back bonding pad position of the selected battery piece.

8. The laminated assembly production line of claim 7, wherein the solder paste dispensing device is provided with an induction probe for sensing the position of a battery piece to be solder-dispensed in the battery string and a solder paste head for dispensing solder paste on a solder pad of the battery piece to be solder-dispensed according to an induction signal of the induction probe.

9. The production line of stack components according to claim 7 or 8, wherein the production line has a conveyor belt for conveying the battery string, the conveyor belt having a solder paste dispensing segment conveyor belt cooperating with the solder paste dispensing device and being independent of other positions of the conveyor belt, the solder paste dispensing segment conveyor belt having a first state for conveying the battery string along the length of the battery string and a second state for holding the battery string stationary for solder paste dispensing by the solder paste dispensing device.

10. The laminated tile assembly line of claim 7 or 8, further comprising: the scribing device, the screen printing device and the splitting device are positioned at the front end of the laminating device and are sequentially arranged in front of and behind the laminating device, the detection device is positioned between the solder paste dispensing device and the string arranging device and is used for detecting the battery strings, and the laminating device is positioned at the rear end of the string arranging device; the lamination device comprises a lamination unit for realizing the tiling arrangement of the battery pieces and a curing unit for curing and connecting the tiled battery pieces to form a battery string.