阅读说明：本技术 一种降低电传输损耗的新型组件制备方法 (Novel component manufacturing method for reducing electric transmission loss ) 是由 杨飞飞 张波 赵科巍 鲁贵林 申开愉 张云鹏 吕爱武 杨旭彪 梁玲 于 2021-08-27 设计创作，主要内容包括：本发明涉及太阳能电池领域。一种降低电传输损耗的新型组件制备方法,将同样规格的分区太阳能电池片排列成一个多行多列的组件,组件每行的分区太阳能电池片数量相等,组件每列的分区太阳能电池片数量相等且为偶数,在组件每行的分区太阳能电池片中,相邻两个分区太阳能电池片成片间串联关系,组件奇数排的最右侧分区太阳能电池片和其下一排偶数排的最右侧分区太阳能电池片成首尾串联关系,组件偶数排的最左侧分区太阳能电池片和其下一排奇数排的最左侧分区太阳能电池片成中间并联关系。本发明能够降低光伏组件的度电成本。(The present invention relates to the field of solar cells. A novel assembly preparation method for reducing electric transmission loss is characterized in that partitioned solar cells with the same specification are arranged into an assembly with multiple rows and multiple columns, the number of the partitioned solar cells in each row of the assembly is equal and is an even number, in the partitioned solar cells in each row of the assembly, two adjacent partitioned solar cells are in series connection, the rightmost partitioned solar cell in an odd row of the assembly and the rightmost partitioned solar cell in an even row of the assembly are in series connection end to end, and the leftmost partitioned solar cell in an even row of the assembly and the leftmost partitioned solar cell in an odd row of the assembly are in parallel connection. The invention can reduce the electricity consumption cost of the photovoltaic module.)

1. A novel component preparation method for reducing electric transmission loss is characterized by comprising the following steps: the partitioned solar cells with the same specification are arranged into a module in multiple rows and multiple columns, the number of the partitioned solar cells in each row of the module is equal, the number of the partitioned solar cells in each column of the module is equal and even, in the partitioned solar cells in each row of the module, two adjacent partitioned solar cells are in series connection, the rightmost partitioned solar cell in an odd row of the module and the rightmost partitioned solar cell in an even row of the module are in series connection end to end, the leftmost partitioned solar cell in an even row of the module and the leftmost partitioned solar cell in an odd row of the module are in parallel connection, main grid lines led out from each partition on the front face/back face of the leftmost partitioned solar cell in a first row of the module are in parallel connection and serve as the anode/cathode of the module, and the main grid lines led out from each partition on the back face/front face of the leftmost partitioned solar cell in a last row of the module are in parallel connection and serve as the parallel connection The partitioned solar cell is characterized in that front laser patterns and back laser patterns of a single solar cell plate are divided into a plurality of independent blocks with the same number, each independent block is provided with an independent main grid line and a plurality of auxiliary grid lines, each independent block forms an independent sub-crystalline silicon cell structure, and the single solar cell plate crystalline silicon cell structure is formed by all sub-crystalline silicon cell structures in parallel.

2. The method of claim 1, wherein the method comprises the steps of: in each independent block, all the auxiliary grid lines extend in a straight line in the left-right direction, the auxiliary grid line extension line of any independent block covers the auxiliary grid lines of other independent blocks, the main grid line is perpendicular to all the auxiliary grid lines, the distance between every two adjacent independent blocks is 1.0-5.0mm, the length of the auxiliary grid line of each independent block is 5-30mm, the distance between every two adjacent auxiliary grid lines of each independent block is 1-1.7mm, and the distance between every two adjacent main grid lines in the independent blocks is 6-40 mm.

3. The method of claim 1, wherein the method comprises the steps of: the series relation between the two adjacent cell pieces means that the front main grid of each partition of the previous partitioned solar cell piece is connected with the back main grid of each partition of the next partitioned solar cell piece in a one-to-one corresponding manner or the back main grid of each partition of the previous partitioned solar cell piece is connected with the front main grid of each partition of the next partitioned solar cell piece in a one-to-one corresponding manner; the rightmost subarea solar cells of the odd-numbered rows of the assembly and the rightmost subarea solar cells of the next even-numbered row of the assembly are connected in series end to end, namely, a symmetrical non-staggered mode is adopted, and the front main grids of each subarea of the rightmost subarea solar cells of the odd-numbered rows of the assembly are correspondingly connected with the back main grids of each subarea of the rightmost subarea solar cells of the next even-numbered rows one by one or the back main grids of each subarea of the rightmost subarea solar cells of the odd-numbered rows of the assembly are correspondingly connected with the front main grids of each subarea of the rightmost subarea solar cells of the next even-numbered rows one by one; all the subarea solar cells of any odd row of the module and each corresponding subarea of all the subarea solar cells of the next even row of the module are in series connection through inter-cell series connection and end-to-end series connection; the leftmost subarea solar cell of the even-numbered row of the module and the leftmost subarea solar cell of the next odd-numbered row of the module are in an intermediate parallel connection relationship, namely, the leftmost subarea solar cell of the even-numbered row of the module and the leftmost subarea solar cell of the next odd-numbered row of the module are in an end-to-end series connection relationship and are connected to a parallel connection point together.

Technical Field

The present invention relates to the field of solar cells.

Background

With global concern on climate warming, the market potential of new energy power generation is huge in the future, and the traditional coal power generation market is gradually shrunk. In recent years, no matter the technical innovation or the cost reduction aspect, the photovoltaic power generation has great progress, but compared with the traditional thermal power, the power consumption cost is still higher, and how to further improve the photovoltaic power generation efficiency and reduce the power generation cost through the technical innovation becomes the effort direction of the future photovoltaic power generation.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to further improve the generating efficiency of the solar cell, and when the cell is partially damaged, the use is not influenced.

The technical scheme adopted by the invention is as follows: a novel component preparation method for reducing electric transmission loss is characterized in that partitioned solar cells with the same specification are arranged into a component with multiple rows and multiple columns, the number of the partitioned solar cells in each row of the component is equal and is even, in the partitioned solar cells in each row of the component, two adjacent partitioned solar cells are in series connection, the rightmost partitioned solar cell in an odd row of the component and the rightmost partitioned solar cell in an even row of the component are in series connection end to end, the leftmost partitioned solar cell in an even row of the component and the leftmost partitioned solar cell in an odd row of the component are in parallel connection, main grid lines led out from the front/back of each partition of the leftmost partitioned solar cell in a first row of the component are in parallel connection and serve as an anode/cathode of the component, the main grid lines led out from the back/front of the leftmost subarea solar cell piece in the last row of the assembly are in parallel relation and are used as a cathode/anode of the assembly, the main grid lines led out from the front of the leftmost subarea solar cell piece in the first row of the assembly are used as an anode, the main grid lines led out from the back of the leftmost subarea solar cell piece in the last row of the assembly are used as a cathode, the main grid lines led out from the back of the first row of the subarea solar cell piece in the assembly are used as a cathode, the main grid lines led out from the front of the last row of the subarea solar cell piece in the assembly are used as an anode, the subarea solar cell piece means that the front laser pattern and the back laser pattern of a single solar cell piece are divided into a plurality of independent blocks with the same number, each independent block is provided with one main grid line and a plurality of auxiliary grid lines, and each independent block forms an independent sub-crystal silicon cell structure, the single solar cell panel crystalline silicon cell structure is formed by juxtaposing all the crystalline silicon cell structures.

In each independent block, all the auxiliary grid lines extend in a straight line in the left-right direction, the auxiliary grid line extension line of any independent block covers the auxiliary grid lines of other independent blocks, the main grid line is perpendicular to all the auxiliary grid lines, the distance between every two adjacent independent blocks is 1.0-5.0mm, the length of the auxiliary grid line of each independent block is 5-30mm, the distance between every two adjacent auxiliary grid lines of each independent block is 1-1.7mm, and the distance between every two adjacent main grid lines in the independent blocks is 6-40 mm.

The series relation between the two adjacent cell pieces means that the front main grid of each partition of the previous partitioned solar cell piece is connected with the back main grid of each partition of the next partitioned solar cell piece in a one-to-one corresponding manner or the back main grid of each partition of the previous partitioned solar cell piece is connected with the front main grid of each partition of the next partitioned solar cell piece in a one-to-one corresponding manner; the rightmost subarea solar cells of the odd-numbered rows of the assembly and the rightmost subarea solar cells of the next even-numbered row of the assembly are connected in series end to end, namely, a symmetrical non-staggered mode is adopted, and the front main grids of each subarea of the rightmost subarea solar cells of the odd-numbered rows of the assembly are correspondingly connected with the back main grids of each subarea of the rightmost subarea solar cells of the next even-numbered rows one by one or the back main grids of each subarea of the rightmost subarea solar cells of the odd-numbered rows of the assembly are correspondingly connected with the front main grids of each subarea of the rightmost subarea solar cells of the next even-numbered rows one by one; all the subarea solar cells of any odd row of the module and each corresponding subarea of all the subarea solar cells of the next even row of the module are in series connection through inter-cell series connection and end-to-end series connection; the leftmost subarea solar cell of the even-numbered row of the module and the leftmost subarea solar cell of the next odd-numbered row of the module are in an intermediate parallel connection relationship, namely, the leftmost subarea solar cell of the even-numbered row of the module and the leftmost subarea solar cell of the next odd-numbered row of the module are in an end-to-end series connection relationship and are connected to a parallel connection point together.

The invention has the beneficial effects that: the invention uses the special structure battery pieces (subarea solar battery pieces) to form independent subsection multi-path output through series-parallel connection, the battery pieces do not need to be subjected to laser cutting, the output current of the assembly is low, the electric transmission power loss is low, the high-power assembly can be prepared, and the electricity consumption cost of the photovoltaic assembly is reduced.

Drawings

FIG. 1 is a schematic view of the assembly connections of the present invention;

FIG. 2 is a schematic view of the assembly position;

FIG. 3 is a schematic diagram of a front side metallization pattern of a partitioned solar cell;

FIG. 4 is a schematic view of a backside metallization pattern of a zoned solar cell sheet;

FIG. 5 is a schematic view of an inter-chip series connection;

FIG. 6 is a schematic of a head-to-tail series connection;

FIG. 7 is a schematic diagram of an end-to-end parallel connection;

FIG. 8 is a schematic view of an intermediate parallel connection;

wherein, 1-glass layer, 2-series-parallel battery pieces, 3-backboard or toughened glass, 31-battery front side metallization segmentation graph, 32-battery front side metallization segmentation interval, 33 battery front side metallization main grid line, 34-battery front side metallization main grid line interval, 36-battery back side metallization segmentation graph, 37-battery back side metallization segmentation interval, 38-battery back side metallization main grid line, 39-battery back side metallization main grid line interval, 5-inter-piece series connection, 6-end-to-end series connection, 7-end-to-end parallel connection, 8-middle parallel connection, 51-battery piece cathode, 52-battery piece anode, 53-novel structure battery piece, 55-battery piece interval, 61-battery piece inter-piece interconnection, 62-battery piece end-to-end interconnection, 63-space between the head and the tail of the cell, 71-cell parallel bus bar, 72-cell parallel branch and 81-parallel connection point.

In addition, the invention combines the characteristics of the partitioned solar cells by the connection mode of first series connection and then parallel connection, so that each region of the cell independently generates power, and the use of the whole assembly is not influenced even if one cell region has a problem.

Detailed Description

As shown in fig. 1 and 2, the whole assembly comprises a back plate or toughened glass 3, series-parallel battery pieces 2 and a glass layer 1 which are sequentially arranged from bottom to top, wherein the series-parallel battery pieces 2 are novel assemblies for reducing the electric transmission loss and are assemblies with multiple rows and multiple columns formed by arranging partitioned solar battery pieces with the same specification, the number of the partitioned solar battery pieces in each row of the assembly is equal, the number of the partitioned solar battery pieces in each column of the assembly is equal and is even, the partitioned solar battery pieces are connected in a mode of being connected in series first and then in parallel, the series structure is a main grid series connection of front and back metalized graphs among the different partitioned solar battery pieces, and the parallel part is a series structure of front and back metalized graphs among the mutually independent partitioned solar battery pieces and is connected into a junction box in a parallel mode.

As shown in fig. 3, the front metal grid line of the cell (partitioned solar cell) with the novel structure is a front metallization pattern, and is divided into 5-15 front metallization segment patterns 31 by front metallization dividing intervals 32 according to different cell specifications.

As shown in fig. 4, the back metal grid lines of the novel-structure cell piece are back metallization patterns, which are divided into 5-15 back metallization segment patterns 35 by back metallization division spaces 33, the number of the segments of the back metallization segment patterns 35 is equal to the number of the segments of the front metallization segment patterns 31, and the segments correspond to one another, and a main grid line perpendicular to the secondary grid lines is respectively led out.

As shown in fig. 1, the connection of the battery pieces adopts a mode of first series connection and then parallel connection, wherein the series connection structure of the battery pieces is divided into inter-piece series connection 5 and end-to-end series connection 6; the parallel connection part is divided into a head-tail parallel connection 7 and a middle parallel connection 8. The series relation between the two adjacent cell pieces means that the front main grid of each partition of the previous partitioned solar cell piece is connected with the back main grid of each partition of the next partitioned solar cell piece in a one-to-one corresponding manner or the back main grid of each partition of the previous partitioned solar cell piece is connected with the front main grid of each partition of the next partitioned solar cell piece in a one-to-one corresponding manner; the rightmost subarea solar cells of the odd-numbered rows of the assembly and the rightmost subarea solar cells of the next even-numbered row of the assembly are connected in series end to end, namely, a symmetrical non-staggered mode is adopted, and the front main grids of each subarea of the rightmost subarea solar cells of the odd-numbered rows of the assembly are correspondingly connected with the back main grids of each subarea of the rightmost subarea solar cells of the next even-numbered rows one by one or the back main grids of each subarea of the rightmost subarea solar cells of the odd-numbered rows of the assembly are correspondingly connected with the front main grids of each subarea of the rightmost subarea solar cells of the next even-numbered rows one by one; all the subarea solar cells of any odd row of the module and each corresponding subarea of all the subarea solar cells of the next even row of the module are in series connection through inter-cell series connection and end-to-end series connection; the leftmost subarea solar cell of the even-numbered row of the module and the leftmost subarea solar cell of the next odd-numbered row of the module are in an intermediate parallel connection relationship, namely, the leftmost subarea solar cell of the even-numbered row of the module and the leftmost subarea solar cell of the next odd-numbered row of the module are in an end-to-end series connection relationship and are connected to a parallel connection point together.

As shown in fig. 5, the cells are connected in series in parallel by the main grids of the front and rear novel-structure cells 53, the positive electrode 51 (front main grid line) of the front cell is connected with the negative electrode 52 (back main grid line) of the rear cell, and the cell spacing 55 is controlled to be 1-12mm (note that in the drawing, the front of the cell is placed upwards, the bus bar is led out by the front main grid line deep into the cell, and the bus bar is led out by the back main grid line directly connected with the cell).

As shown in fig. 6, the serial connection 62 of the cell pieces from the head to the tail adopts the symmetrical non-staggered principle, as shown by the number marked by the interconnection bars 61 between the cell pieces, wherein the distance 63 between the interconnection bars between the head and the tail of the cell pieces is controlled to be 1-3 mm.

As shown in fig. 7 and 8, the parallel connection of the parallel connection parts from the head to the tail consists of a cell parallel bus bar 71 and a cell parallel branch 72, and the middle parallel connection part of the cell is led out from a cell parallel connection point 81.

In this embodiment, the assembly structure is 6 × 10 cell layout, and the cell size is 166 × 166mm²The specification is that the front and back surfaces of a single battery piece are divided into 9 front and back surface metallization segmented patterns, the whole assembly battery piece is interconnected in a series-connection and parallel-connection structure, the series-connection part of the battery pieces comprises 5 series-connection between the battery pieces and 6 series-connection end to end, and the parallel-connection part comprises 7 parallel-connection end to end and 8 parallel-connection middle of the battery pieces. The distance 35 between the front side metallization pattern main grid lines 33 and the distance 39 between the back side metallization pattern main grid lines 38 of the single battery piece are both 16.8 mm.

The inter-cell series connection is formed by parallelly interconnecting 9 main grids of segmented patterns of front and rear novel-structure cell pieces 53, the positive electrode 51 of the front cell piece is connected with the negative electrode 52 of the rear cell piece, and the cell piece spacing 55 is controlled to be 2 mm;

the series connection 62 of the battery pieces from the head to the tail adopts a symmetrical and non-staggered principle, as shown by the number marked by the interconnection bars 61 between the battery pieces in the figure, wherein the distance 63 between the interconnection bars of the battery pieces from the head to the tail is controlled to be 2 mm. Wherein the interconnecting strips are circular welding strips, the diameter of the welding strips is 1.0mm,

the parallel connection of the head and the tail of the parallel connection part is composed of a battery plate parallel bus bar 71 and a battery plate parallel branch 72, the parallel connection part in the middle of the battery plate is led out from a battery plate parallel connection point 81, wherein the width of the bus bar is 3.5mm, and the thickness of the bus bar is 0.2 mm.

The parallel connection part is divided into a battery piece head and tail parallel connection part and a battery piece electrode parallel connection part, wherein the head and tail parallel connection part is composed of 5-15 parallel branches according to the quantity of front and back metallization segmented graphs in the battery piece with the novel structure and is led out by a head and tail parallel connection interconnection strip, the middle parallel connection part is led out by a middle node of the parallel connection branch, and a one-way conduction diode (not shown in the figure) is arranged between every two nodes, the node and the head and tail parallel connection interconnection strip.

The invention uses the special structure battery pieces, and forms independent segmented multi-path output through series-parallel connection, the battery pieces do not need to be subjected to laser cutting, the output current of the assembly is low, the electric transmission power loss is low, a high-power assembly can be prepared, and the power consumption cost of the photovoltaic assembly is reduced.