CN215771178U - High-tension laminated-tile battery piece structure and laminated-tile assembly thereof - Google Patents
High-tension laminated-tile battery piece structure and laminated-tile assembly thereof Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model relates to a high-tension laminated tile battery piece structure and a laminated tile assembly thereof, which comprise battery pieces formed by cutting battery pieces, wherein the battery pieces are formed by cutting a substrate silicon wafer into three pieces by laser, and the cutting depth is more than 60%; the three-part battery piece is provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery piece, and two main grid lines are arranged back to back at the position of the cutting line on the back surface of the battery piece; the battery piece is cut according to the cutting line and then is broken into battery pieces, and a plurality of groups of conductive adhesives and adhesives are arranged on the battery pieces. According to the utility model, the coating adhesive is added, the tension between the sheets is increased, the product reliability risk caused by small bonding tension of the heterojunction low-temperature silver paste and the conductive adhesive is reduced, and the product reliability is improved.
Description
Technical Field
The utility model relates to the technical field of solar cell modules, in particular to a high-tension laminated cell structure and a laminated module thereof.
Background
With the wide application of solar energy, the solar photovoltaic panel industry is also developed vigorously, and when a traditional solar cell panel is produced, due to the characteristics of the structure of the cell, a plurality of cells and welding strips need to be welded into a cell string, and then the cell string and other components are assembled into a whole. Because each cell is provided with the welding strip, the illumination area of the cell is greatly reduced, and the effective power generation area is reduced; moreover, on the battery string formed by serial connection, the distance is also formed between the battery pieces, so that the illumination area or the power generation area is also reduced; the above two causes cause a low power generation efficiency of the battery piece.
The lamination assembly adopts another battery piece interconnection technology, slices the battery piece, places one side of the battery piece A below another battery piece B after slicing, makes the main grid line electrode on the front side of the battery piece A and the main grid line electrode on the back side of the battery piece B coincide with each other, and adopts materials such as conductive adhesive, solder strip or tin paste to form physical connection and conductive connection between the two electrodes.
The preparation process of the laminated tile assembly in the prior art has two kinds, for example, as provided in chinese patent CN108091705B, the method one: laser pre-cutting the whole piece → printing the whole piece of conductive adhesive → breaking the piece into small pieces → stacking the pieces into strings; the second method comprises the following steps: printing the whole conductive adhesive → pre-cutting the whole laser → breaking the piece into small pieces → stringing the laminated pieces.
The heterojunction battery is applied to the manufacture of high-efficiency components due to the advantages of few manufacturing procedures, high efficiency, no LID, no PID, no low temperature coefficient and the like, and the process of the existing heterojunction battery brings the following problems:
(1) the high temperature of laser cutting can cause damage of amorphous silicon and TCO films and damage layers can be generated on cutting surfaces to cause serious edge recombination, so that the efficiency of the cell is reduced, the cell is generally cut into 5-7 pieces by 4-6 laser in the cutting process of the stack tile assembly cell, the cutting efficiency loss and the number of cutting tracks form positive correlation relationship, and the stack tile assembly has limitation in matching application with heterojunction cells.
(2) In consideration of the PN junction characteristics, cutting loss and process yield of the battery piece, the laser cutting splitting process usually adopts 40-60% of depth of the battery piece to be cut, and then mechanical splitting is performed, but the battery piece can generate fine defects on a cutting surface after being cut, the larger the uncut depth proportion in the splitting process is, the larger the stress generated by breaking the piece is, the more easily the splitting failure is generated, and the larger the number of cutting channels is, the higher the failure rate is.
(3) The existing process flow is to print the whole piece and then split the piece, conductive adhesive on the battery strip with poor split piece is wasted, and the poor split piece procedure is increased and the conductive adhesive waste is increased due to the fact that the heterojunction battery silicon wafer is thinner.
(4) The power of the assembly is increased by adopting large-size battery pieces such as 182 and 210 batteries, the reduction of the power cost is the main direction for lowering the cost and increasing the product competitiveness in the industry at present, the heterojunction battery piece is usually made of a thinner silicon wafer with the thickness of 140mm-160mm, the warpage of the silicon wafer is increased along with the increase of the size of the silicon wafer, and the problem of uneven coating on the battery is caused by the overlarge warpage of the silicon wafer, so that the battery efficiency is influenced.
(5) The conductive adhesive is usually 60% -80% of silver powder for conducting electricity, the resin content playing a bonding role is usually only 20% -40%, and in addition, the heterojunction battery main grid is made of low-temperature silver paste, the welding tension of the heterojunction battery main grid is low, so that a certain risk exists in bonding of the battery piece and the battery piece in the heterojunction laminated tile, the risk possibly causes the problem that the contact resistance of a bonding part of the component in an outdoor high-low temperature alternating dynamic environment is increased, the resistance of the contact resistance is increased, the power of the component is attenuated, the safety coefficient of a contact point heating component is reduced, and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and provide a high-tension laminated cell structure and a laminated assembly thereof, which reduce the cutting loss in the manufacture of the heterojunction laminated assembly so as to improve the assembly power.
The purpose of the utility model is realized as follows: a high-tension laminated tile battery piece structure comprises battery pieces formed by cutting battery pieces, wherein the battery pieces are formed by cutting a substrate silicon wafer into three pieces by laser; the three-part battery piece is provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery piece, and two main grid lines are arranged back to back at the position of the cutting line on the back surface of the battery piece; the battery piece is cut according to the cutting line and then is broken into battery pieces, and a plurality of groups of conductive adhesives and adhesives are arranged on the battery pieces.
Furthermore, the battery piece is formed by cutting a substrate silicon wafer, and the cutting depth is larger than 60%.
Furthermore, two conductive adhesives are arranged in each group of conductive adhesives and adhesives, and one adhesive is arranged between the two conductive adhesives.
Further, the conductive glue and the adhesive in each group of conductive glue and adhesive are arranged at intervals.
A high-tension laminated tile assembly comprises a battery string array, wherein the battery string is composed of a plurality of battery pieces, each battery piece is formed by cutting a battery piece, each battery piece is formed by cutting a substrate silicon wafer into three pieces by laser, and the cutting depth is more than 60%; the three-part battery piece is provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery piece, and two main grid lines are arranged back to back at the position of the cutting line on the back surface of the battery piece; the battery string array comprises six battery strings on the left and the right, the six battery strings on the left and the six battery strings on the right are in circuit connection through a first bus bar, a second bus bar and a third bus bar are respectively welded with one ends of the six battery strings on the left and the right, a fourth bus bar is connected with the second bus bar, and a fifth bus bar is connected with the third bus bar.
Further, the battery string is formed by overlapping adjacent battery chips up and down, the overlapping width is 0.1mm-3mm, and the length of the battery string depends on the number of the battery chips.
Further, the battery piece is cut according to the cutting line and then broken into battery pieces, and a plurality of groups of conductive adhesives and adhesives are arranged on the battery pieces.
Furthermore, two ends of the back of the battery string array are respectively provided with a junction box.
Further, the fourth bus bar and the fifth bus bar are used as positive and negative electrode output ends of the assembly.
Compared with the prior art, the utility model has the beneficial effects that:
(1) according to the utility model, through the improvement of the heterojunction battery manufacturing process and the optimization of the design of the screen printing plate graph of the battery piece, the problem of battery efficiency loss caused by the warping of a silicon wafer in the large-size heterojunction battery manufacturing process is solved, and the power loss of the heterojunction imbricated assembly caused by cutting is reduced, so that the assembly power is improved.
(2) According to the utility model, before cleaning, the cell end firstly cuts the silicon wafer into three or two sub-wafers by laser, and then the procedures of cleaning, amorphous silicon film deposition, TCO preparation, printing, testing and grading are carried out, because the cutting occurs before the amorphous silicon film deposition and TCO film plating, the cutting depth can adopt more than 60% of cutting depth for cutting, the breaking stress is reduced, the bad fragments caused by laser cutting and splitting are reduced, and the cleaning procedure can effectively remove the damage layer caused by cutting, so that the edge composite effect caused by the laser cutting is avoided, the warping of the silicon wafer is reduced after the silicon wafer is cut, and the coating uniformity is also improved;
the assembly end uses laser to cut and split the three-piece or two-piece battery, and the cut battery pieces are three-piece or two-piece batteries, so that the assembly end only needs to be cut once or twice, and the power loss of the assembly caused by cutting is reduced; and after the chips are cracked, the appearance of the chips is sorted, the defective chips are sorted out, and then the chips are printed, so that the waste of the conductive adhesive is avoided.
(3) According to the utility model, by adding the coating adhesive, the tension between the battery pieces is increased, the product reliability risk caused by small bonding tension of the heterojunction low-temperature silver paste and the conductive adhesive is reduced, and the product reliability is improved.
Drawings
Fig. 1 is a process flow diagram of a heterojunction cell of the utility model.
FIG. 2 is a schematic diagram of a structure of a cut cell piece with a mask according to the present invention.
Figure 3 is a process flow diagram of a stack assembly of the present invention.
Fig. 4 is a screen layout of a two-piece dicing cell according to embodiment 1 of the present invention.
Fig. 5 is a schematic cutting diagram of embodiment 1 of the present invention.
Fig. 6 is a schematic illustration of the position of print coating of example 1 of the present invention.
Fig. 7 is an enlarged view of the battery cell string of fig. 6.
Fig. 8 is a schematic cell overlap diagram of example 1 of the present invention.
Fig. 9 is a schematic structural view of a battery string according to embodiment 1 of the present invention.
Fig. 10 is a schematic view of welding of an edge bus bar of embodiment 1 of the present invention.
Fig. 11 is a battery string stack diagram according to embodiment 1 of the present invention.
Fig. 12 is a back view of the module of example 1 of the present invention.
Fig. 13 is an electrical schematic diagram of embodiment 1 of the present invention.
Fig. 14 is a screen layout of a three-segment cut cell according to embodiment 2 of the present invention.
Fig. 15 is a schematic position diagram of the printing coating of the battery cell string of example 2 of the present invention.
Wherein:
the liquid crystal display panel comprises a mask 1, a TCO conductive film 2, a first main grid line 3, a second main grid line 4, a third main grid line 5, a fourth main grid line 6, a fifth main grid line 7, a sixth main grid line 8, a first bus bar 9, a second bus bar 10, a third bus bar 11, a fourth bus bar 12 and a fifth bus bar 13.
Detailed Description
Example 1:
referring to fig. 1-7, the utility model relates to a high-tension laminated cell structure, which comprises a cell slice cut from a cell slice, wherein the cell slice is formed by laser cutting two substrate silicon slices, and the cutting depth is more than 60%.
The grid line positions of the front and back of the battery piece are shown in fig. 4, two cutting lines are arranged on the two battery pieces according to trisection, three main grid lines are arranged on the front of the battery piece, a first main grid line 3 and a second main grid line 4 are respectively arranged on two side edges of the battery piece, a third main grid line 5 is arranged at a dividing line of the left part of the battery piece, three main grid lines are arranged on the back of the battery piece, a fourth main grid line 6 and a fifth main grid line 7 are arranged at a dividing line of the right part of the battery piece, the fourth main grid line 6 and the fifth main grid line 7 are arranged on two sides of the dividing line back to back, a sixth main grid line 8 is arranged at a dividing line of the left part of the battery piece, and the sixth main grid line 8 is arranged at a back-to-back position corresponding to the third main grid line 5.
Cutting the battery piece according to a cutting line, breaking the battery piece into battery pieces, arranging a plurality of groups of conductive adhesives and adhesives on main grid lines on the battery pieces, arranging two conductive adhesives in each group, and arranging one adhesive between the two conductive adhesives; the conductive adhesive is coated in a printing or dispensing mode and used for conducting electricity, and the adhesive is coated in a dispensing or other mode and used for enhancing the bonding effect.
Referring to fig. 1-13, the high-tensile-force tile-stacked assembly according to the present invention comprises a battery string array, wherein the battery string is composed of the above battery pieces, the adjacent battery pieces are overlapped up and down to form the battery string, the overlapping width is 0.1mm-3mm, the conductive adhesive plays roles of bonding, interconnection and conduction, the adhesive plays a role of reinforcing the bonding strength, and the length of the battery string depends on the number of the battery pieces; the battery string is welded with the edge bus bar to form a string;
the battery string array comprises six battery strings on the left and the right, the six battery strings on the left and the six battery strings on the right are in circuit connection through a first bus bar 9, a second bus bar 10 and a third bus bar 11 are respectively welded with one ends of the six battery strings on the left and the right, a fourth bus bar 12 is connected with the second bus bar 10, a fifth bus bar 13 is connected with the third bus bar 11, and the fourth bus bar 12 and the fifth bus bar 13 serve as the anode and cathode output ends of the assembly.
And two ends of the back of the battery string array are respectively provided with a junction box.
The utility model relates to a preparation method of a high-tension laminated tile battery plate structure, which comprises the following steps:
s1: the laser cutting is carried out, and the laser cutting,
a substrate silicon wafer is selected and cut into two sub-pieces by laser, and the cutting depth is over 60 percent, so that the breaking stress is reduced, and the bad fragments caused by laser cutting and splitting are reduced; breaking the slices into small pieces;
s2: the cleaning is carried out, and the cleaning is carried out,
the small pieces after being cut and broken are subjected to texturing and cleaning treatment, and the cleaning process can effectively remove a damage layer caused by cutting, so that the edge composite effect caused by the laser cutting is avoided, the warping of the silicon wafer is reduced along with the cutting of the silicon wafer, and the coating uniformity is improved;
s3: preparing a double-sided intrinsic amorphous silicon layer by PECVD;
s4: preparing an n-type amorphous silicon doped layer by using plasma enhanced chemical vapor deposition;
s5: preparing a p-type amorphous silicon doped layer by using plasma chemical vapor deposition;
s6: depositing a double-sided TCO conductive film 2 by using an RPD or PVD method; when the TCO conductive film is prepared, because the mask 1 with the width of 0.3mm-0.7mm is generated around each unit cell due to the shielding of the carrier plate, the number of the cell units is increased after the silicon wafer is divided into two pieces, and the number of the mask 1 is also increased, as shown in figure 2;
s7: printing, namely forming front and back Ag electrodes by screen printing;
s8: curing, so that good ohmic contact is formed between the silver grid line and the TCO conductive film 2;
s9: and testing grading to test the electrical property of the battery.
Referring to fig. 3-13, the present invention relates to a method for manufacturing a high tensile stack assembly, comprising the steps of:
s1: the laser cutting is carried out, and the laser cutting,
before cutting, firstly, screen printing plate design of two divided cells is carried out, as a mask 1 is not provided with a TCO conductive film 2 and does not have the current collecting capacity, main grid lines are printed at the mask position through optimization of the screen printing plate main grid design of the cell, then the mask 1 is arranged at two small overlapping positions by utilizing the overlapping characteristic of the manufacturing process of a tile stack assembly, the extra efficiency loss caused by the increase of the mask 1 after the silicon wafer is changed into two units from one unit after the silicon wafer is cut is avoided, grid line positions on the front surface and the back surface of the cell refer to figure 4, the two divided cells are provided with two cutting lines according to trisection, the front surface of the cell is provided with three main grid lines, two sides of the cell are respectively provided with a first main grid line 3 and a second main grid line 4, a division line on the left part of the cell is provided with a third main grid line 5, the back surface of the cell is provided with three main grid lines, and a fourth main grid line 6 and a fifth main grid line 7 are arranged at the division line on the right part of the cell, the fourth main grid line 6 and the fifth main grid line 7 are arranged on two sides of the dividing line back to back, a sixth main grid line 8 is arranged at the dividing line of the left part of the battery piece, and the sixth main grid line 8 is arranged at the back-to-back position corresponding to the third main grid line 5.
The two split batteries are cut and split by laser according to the design pattern, and the cut battery pieces are the two split batteries, so that the assembly end only needs to be cut twice, and the power loss of the assembly caused by cutting is reduced;
s2: the splinter is formed by splitting the wood into pieces,
breaking the cut battery pieces into battery pieces according to a precut route;
s3: the small pieces are sorted out in a small piece sorting way,
sorting the appearance of the battery pieces, selecting out bad pieces, and then loading the pieces;
s4: small pieces of conductive glue are printed and coated with adhesive,
referring to fig. 6 and 7, conducting adhesive printing is performed on the sorted qualified battery pieces, the printing adopts a segmented printing mode, firstly a conducting adhesive material for conducting is coated in a printing or dispensing mode, then an adhesive for enhancing the bonding effect is coated, and dispensing or other modes are required when the adhesive is coated because the conducting adhesive is already on the battery pieces; coating the adhesive between the conductive adhesives at intervals;
s5: the chips are stacked into a battery string,
the adjacent battery chips are overlapped up and down, the overlapping width is 0.1mm-3mm, the conductive adhesive plays a role in bonding interconnection and conduction, the adhesive plays a role in reinforcing bonding strength, and the length of the battery string depends on the number of the chips; see fig. 8 and 9;
s6: the terminals of the battery string are welded,
the edge welding strip with the punching structure is adopted to reduce welding stress, the edge welding strip with the punching structure comprises a single-hole edge welding strip, a double-hole edge welding strip, a long-hole edge welding strip and the like, and the width of the edge welding strip is 5-20 mm; see fig. 10;
s7: the cell strings are laid out and laminated on each other,
the battery pack comprises six battery strings on the left and the right of the assembly, wherein the six battery strings on the left and the six battery strings on the right are in circuit connection through a first bus bar 9, a second bus bar 10 and a third bus bar 11 are respectively welded with one end of each of the six battery strings on the left and the right, a fourth bus bar 12 is connected with the second bus bar 10, a fifth bus bar 13 is connected with the third bus bar 11, and the fourth bus bar 12 and the fifth bus bar 13 are used as positive and negative output ends of the assembly; see fig. 11;
s8: a component packaging process;
s9: the connecting junction boxes are arranged at two ends of the assembly in a split mode, so that the length of the cable is saved, and the connecting junction boxes are shown in figure 12.
Example 2:
referring to fig. 14-15, the high-tensile laminated cell structure of the present invention comprises a cell slice cut from a cell slice, wherein the cell slice is formed by laser cutting a substrate silicon wafer into three parts, and the cutting depth is greater than 60%.
Referring to fig. 14, the grid line positions of the front surface and the back surface of the battery piece are provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery piece, and two main grid lines are arranged back to back at the position of the cutting line of the back surface of the battery piece.
The battery piece is cut according to the cutting line and then broken into battery pieces, conductive adhesive and adhesive are arranged on the main grid lines of the battery pieces at intervals, the conductive adhesive is coated in a printing or dispensing mode and used for conducting electricity, and the adhesive is coated in a dispensing or other mode and used for enhancing the bonding effect.
Referring to fig. 1-13, the high-tensile-force tile-stacked assembly according to the present invention comprises a battery string array, wherein the battery string is composed of the above battery pieces, the adjacent battery pieces are overlapped up and down to form the battery string, the overlapping width is 0.1mm-3mm, the conductive adhesive plays roles of bonding, interconnection and conduction, the adhesive plays a role of reinforcing the bonding strength, and the length of the battery string depends on the number of the battery pieces; the battery string is welded with the edge bus bar to form a string;
the battery string array comprises six battery strings on the left and the right, the six battery strings on the left and the six battery strings on the right are in circuit connection through a first bus bar 9, a second bus bar 10 and a third bus bar 11 are respectively welded with one ends of the six battery strings on the left and the right, a fourth bus bar 12 is connected with the second bus bar 10, a fifth bus bar 13 is connected with the third bus bar 11, and the fourth bus bar 12 and the fifth bus bar 13 serve as the anode and cathode output ends of the assembly.
And two ends of the back of the battery string array are respectively provided with a junction box.
The utility model relates to a preparation method of a heterojunction battery piece, and the difference between the embodiment 2 and the embodiment 1 is that,
s1: laser cutting, namely selecting a substrate silicon wafer and cutting the substrate silicon wafer into three sub-wafers by laser;
referring to fig. 14-15, a method of making a heterojunction cell stack assembly according to the utility model, this example 2 differs from example 1 in that,
s1: the laser cutting is carried out, and the laser cutting,
referring to fig. 14, before cutting, a screen printing plate design of a three-segment battery is firstly performed, the three-segment battery is provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery, and two main grid lines are arranged back to back at the position of the cutting line of the back surface of the battery;
the three-piece battery is cut and split by laser according to the design pattern, and the cut battery pieces are three-piece batteries, so that the assembly end only needs to be cut once, and the assembly power loss caused by cutting is reduced;
s4: small pieces of conductive glue are printed and coated with adhesive,
and (15) conducting adhesive printing is carried out on the sorted qualified battery slices, the printing adopts a sectional printing mode, firstly, a conducting adhesive material for conducting is coated in a printing or dispensing mode, then, an adhesive for enhancing the bonding effect is coated, the conducting adhesive is coated on the upper surfaces of the battery slices in a dispensing or other mode, and the adhesive is dispensed between two adjacent conducting adhesives.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a high pulling force's stack tile battery piece structure which characterized in that: the solar cell comprises a cell piece formed by cutting a cell piece, wherein the cell piece is formed by cutting a substrate silicon wafer into three pieces by laser; the three-part battery piece is provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery piece, and two main grid lines are arranged back to back at the position of the cutting line on the back surface of the battery piece; the battery piece is cut according to the cutting line and then is broken into battery pieces, and a plurality of groups of conductive adhesives and adhesives are arranged on the battery pieces.
2. A high tension shingled cell structure as defined in claim 1 wherein: the battery piece is formed by cutting a substrate silicon wafer, and the cutting depth is larger than 60%.
3. A high tension shingled cell structure as defined in claim 1 wherein: two conductive adhesives are arranged in each group of conductive adhesives and adhesives, and one adhesive is arranged between the two conductive adhesives.
4. A high tension shingled cell structure as defined in claim 1 wherein: the conductive adhesive and the adhesive in each group of conductive adhesive and adhesive are arranged at intervals.
5. A high tension shingle assembly, comprising: the solar cell comprises a cell string array, wherein the cell string consists of a plurality of cell pieces, each cell piece is formed by cutting a cell piece, and each cell piece is formed by cutting a substrate silicon wafer into three sub-pieces by laser; the three-part battery piece is provided with a cutting line according to two equal parts, two main grid lines are respectively arranged on two side edges of the front surface of the battery piece, and two main grid lines are arranged back to back at the position of the cutting line on the back surface of the battery piece; the battery string array comprises six battery strings on the left and the right, the six battery strings on the left and the six battery strings on the right are in circuit connection through a first bus bar, a second bus bar and a third bus bar are respectively welded with one ends of the six battery strings on the left and the right, a fourth bus bar is connected with the second bus bar, and a fifth bus bar is connected with the third bus bar.
6. A high tension shingle assembly according to claim 5, wherein: the battery piece is formed by cutting a substrate silicon wafer, and the cutting depth is larger than 60%.
7. A high tension shingle assembly according to claim 5, wherein: the battery string is formed by overlapping adjacent battery chips up and down, the overlapping width is 0.1mm-3mm, and the length of the battery string depends on the number of the battery chips.
8. A high tension shingle assembly according to claim 5, wherein: the battery piece is cut according to the cutting line and then is broken into battery pieces, and a plurality of groups of conductive adhesives and adhesives are arranged on the battery pieces.
9. A high tension shingle assembly according to claim 5, wherein: and two ends of the back of the battery string array are respectively provided with a junction box.
10. A high tension shingle assembly according to claim 5, wherein: and the fourth bus bar and the fifth bus bar are used as positive and negative electrode output ends of the assembly.
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| CN202121919815.1U CN215771178U (en) | 2021-08-17 | 2021-08-17 | High-tension laminated-tile battery piece structure and laminated-tile assembly thereof |
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| CN202121919815.1U CN215771178U (en) | 2021-08-17 | 2021-08-17 | High-tension laminated-tile battery piece structure and laminated-tile assembly thereof |
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