CN202721135U - Solar cell - Google Patents
Solar cell Download PDFInfo
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- CN202721135U CN202721135U CN 201220180094 CN201220180094U CN202721135U CN 202721135 U CN202721135 U CN 202721135U CN 201220180094 CN201220180094 CN 201220180094 CN 201220180094 U CN201220180094 U CN 201220180094U CN 202721135 U CN202721135 U CN 202721135U
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- solar battery
- solar cell
- conducting resinl
- cell
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Abstract
The utility model provides a solar cell. The solar cell comprises: a solar cell array which comprises a plurality of parallelly-arranged independent solar cell units, wherein each solar cell unit comprises a first semiconductor layer, a second semiconductor layer located at a lower position, an upper electrode located on the upper surface of the first semiconductor layer and a lower electrode located on the lower surface of the second semiconductor layer; an upper conducting wire assembly located above the solar cell array and penetrating all of the plurality of solar cell units; a lower conducting wire assembly located below the solar cell array, penetrating all of the plurality of solar cell units and alternately arranged with the upper conducting wire assembly; and a conducting resin, between the upper and the lower conducting wire assemblies and the solar cell array, the conducting resin wraps the upper electrode and the lower electrode of each of the solar cell units. According to the utility model, it is convenient to configure the area of the solar cell as needed, production cost is reduced, the performance of the cell is improved, and the solar cell is easy to apply.
Description
Technical field
The utility model relates to field of semiconductor devices, particularly area of solar cell, and more specifically, the utility model relates to a kind of solar cell.
Background technology
Existing solar battery structure normally at first forms solar battery sheet, this solar battery sheet is complete platy structure, in the technique of existing solar battery sheet being carried out bus processing, it is the technology that adopts silk screen printing, printing process is at first solar battery sheet to be placed on the print station, very meticulous printing screen is fixed on the screen frame, is placed on the cell piece top; The pattern that the need that have electrocondution slurry to see through on the silk screen are printed.An amount of slurry is positioned on the silk screen, smears slurry with scraper, make its uniform filling among mesh.Scraper is expressed to slurry on the cell piece by screen mesh in mobile process.The temperature of this process, pressure, speed and its dependent variable all must strict controls.In above-mentioned technology, because cell piece is integral structure, the electrocondution slurry that therefore is positioned at one side can be owing to printing penetrates into another side.
Yet continuous innovation and development along with the area of solar cell technology, a kind of new solar battery structure has appearred, wherein each solar battery cell is independently, such solar cell has the facility of processing cost and process aspect, and can configure easily as required the area of solar cell.But above-described screen printing technique but can not be used in such solar cell, thereby causes the problem such as short circuit that the performance of solar cell is affected because the silk screen printing meeting causes the electrocondution slurry of solar battery cell one side to penetrate into another side when printing.
Therefore, need to propose a kind of formation solar cell, can avoid the generation of above-mentioned situation, under the prerequisite that does not affect solar cell properties, make simultaneously solar cell easier be configured according to actual needs, reduce manufacturing cost and be easy to use.
The utility model content
The purpose of this utility model is intended to solve at least one of above-mentioned technological deficiency, the utility model proposes a kind of solar cell, comprising:
Solar battery array, comprise a plurality of independently solar battery cells that are set up in parallel, each battery unit comprises the first semiconductor layer, is positioned at the second following semiconductor layer, lays respectively at the upper and lower electrode of the first semiconductor layer upper surface and the second semiconductor layer lower surface;
The upper conductor group places described solar battery array top, and runs through described a plurality of battery units each;
The lower wire group places described solar battery array below, runs through each of described a plurality of battery units and arranges with described upper conductor group interval;
Conducting resinl, between described upper and lower wire group and solar battery array, the upper and lower electrode of described each solar battery cell of described conducting resinl parcel.
Alternatively, described solar battery cell has the insulating barrier of the described battery unit of parcel.
Alternatively, the width of described solar battery cell at 0.2mm between the 4mm.
Alternatively, the wire of described upper and lower wire group has consistent width.
Alternatively, the wire of described upper and lower wire group has the width wider than other positions with the overlapping position of solar battery cell, and does not have the thickness thicker than other positions with the overlapping position of solar battery cell.
Alternatively, described conducting resinl covers the inner surface of whole described wire.
Alternatively, described conducting resinl only coated electrode by the inner surface of wire of part.
Alternatively, described electrode wires also has for the bonding plate of raising with the contact area of wire contact portion.
Compare with prior art, solar cell of the present utility model, each solar battery cell in the solar battery array is independently, cell piece with respect to integral structure in the prior art, avoid the impact of silk-screen printing technique on solar cell properties, can configure easily as required the area of solar cell, reduced cost of manufacture, improved the performance of battery, also be easy to use.
Description of drawings
Above-mentioned and/or the additional aspect of the utility model and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 (a) shows the vertical view according to upper conductor in the upper conductor group of the utility model the first embodiment;
Fig. 1 (b) shows the upper conductor shown in Fig. 1 (a) along the viewgraph of cross-section of A-A ' direction;
Fig. 2 (a) has shown according to the covering of the utility model the first embodiment the vertical view of the upper conductor behind the conducting resinl;
Fig. 2 (b) shows and has covered the viewgraph of cross-section of the upper conductor behind the conducting resinl along A-A ' direction shown in Fig. 2 (a);
Fig. 3 (a) shows the vertical view according to the solar battery array of the utility model the first embodiment;
Fig. 3 (b) shows the solar battery array shown in Fig. 3 (a) along the viewgraph of cross-section of A-A ' direction;
Fig. 4 (a) shows and solar battery array is arranged on vertical view on the upper conductor group according to the utility model the first embodiment;
Fig. 4 (b) shows the solar battery array shown in Fig. 4 (a) along the viewgraph of cross-section of A-A ' direction;
Fig. 5 (a) shows the vertical view that is provided with bottom electrode at the solar battery array shown in Fig. 4 (a);
Fig. 5 (b) shows the solar battery array shown in Fig. 5 (a) along the viewgraph of cross-section of A-A ' direction;
Fig. 6 (a) shows the vertical view according to lower wire in the lower wire group of the utility model the first embodiment;
Fig. 6 (b) shows lower wire shown in Fig. 6 (a) along the viewgraph of cross-section of B-B ' direction;
Fig. 7 (a) has shown according to the covering of the utility model the first embodiment the vertical view of the lower wire behind the conducting resinl;
Fig. 7 (b) shows and has covered behind the conducting resinl lower wire shown in Fig. 7 (a) along the viewgraph of cross-section of B-B ' direction;
Fig. 8 (a) shows and solar battery array is arranged on vertical view on the lower wire group according to the utility model the first embodiment;
Fig. 8 (b) shows the solar battery array shown in Fig. 8 (a) along the viewgraph of cross-section of A-A ' direction;
Fig. 8 (c) shows the solar battery array shown in Fig. 8 (a) along the viewgraph of cross-section of B-B ' direction;
Fig. 9 (a) shows the vertical view that is provided with the bottom electrode of bonding plate at the solar battery array shown in Fig. 4 (a);
Fig. 9 (b) shows the solar battery array shown in Fig. 9 (a) along the viewgraph of cross-section of B-B ' direction;
Figure 10 shows the vertical view of the solar battery array behind the end of blocking described upper conductor group one side and the end of blocking described lower wire group opposite side;
Figure 11 shows the vertical view of the solar battery array behind the end that merges bending upper and lower wire group shown in Figure 10;
Figure 12 shows at the vertical view that forms the solar battery array of conducting resinl or electric welding between the upper conductor group and/or between the lower wire group;
Figure 13 (a) has shown according to the covering of the utility model the second embodiment the vertical view of the upper conductor behind the conducting resinl;
Figure 13 (b) shows and has covered behind the conducting resinl upper conductor shown in Figure 13 (a) along the viewgraph of cross-section of A-A ' direction;
Figure 14 (a) shows and solar battery array is arranged on vertical view on the upper conductor group according to the utility model the second embodiment;
Figure 14 (b) shows the solar battery array shown in Figure 14 (a) along the viewgraph of cross-section of A-A ' direction;
Figure 15 shows the vertical view that is provided with bottom electrode at the solar battery array shown in Figure 14 (a);
Figure 16 (a) has shown according to the covering of the utility model the second embodiment the vertical view of the lower wire behind the conducting resinl;
Figure 16 (b) shows and has covered behind the conducting resinl lower wire shown in Figure 16 (a) along the viewgraph of cross-section of B-B ' direction;
Figure 17 (a) shows and solar battery array is arranged on vertical view on the lower wire group according to the utility model the second embodiment;
Figure 17 (b) shows the solar battery array shown in Figure 17 (a) along the viewgraph of cross-section of A-A ' direction;
Figure 17 (c) shows the solar battery array shown in Figure 17 (a) along the viewgraph of cross-section of B-B ' direction;
Figure 18 (a) shows the vertical view that is provided with the bottom electrode of bonding plate at the solar battery array shown in Figure 14 (a);
Figure 18 (b) shows after the solar battery array shown in Figure 18 (a) arranges bottom electrode the viewgraph of cross-section along B-B ' direction;
Figure 19 shows the vertical view according to upper conductor in the upper conductor group of the utility model the 3rd embodiment;
Figure 20 (a) shows the schematic diagram that utilizes modular system to push to wire shown in Figure 19;
Figure 20 (b) shows the vertical view to the upper conductor after the wire squeezes of Figure 19;
Figure 20 (c) shows the upper conductor shown in Figure 20 (b) along the viewgraph of cross-section of A-A ' direction;
Figure 21 (a) has shown according to the covering of the utility model the 3rd embodiment the vertical view of the upper conductor behind the conducting resinl;
Figure 21 (b) shows and has covered the viewgraph of cross-section of the upper conductor behind the conducting resinl along A-A ' direction shown in Figure 21 (a);
Figure 22 (a) show according to the utility model the 3rd embodiment solar battery array is arranged on the upper conductor group and solar battery array be provided with bottom electrode after vertical view;
Figure 22 (b) shows the solar battery array shown in Figure 22 (a) along the viewgraph of cross-section of A-A ' direction;
Figure 23 (a) has shown according to the covering of the utility model the 3rd embodiment the vertical view of the lower wire behind the conducting resinl;
Figure 23 (b) shows and has covered the viewgraph of cross-section of the lower wire behind the conducting resinl along B-B ' direction shown in Figure 23 (a);
Figure 24 (a) shows and solar battery array is arranged on vertical view on the lower wire group according to the utility model the 3rd embodiment;
Figure 24 (b) shows the solar battery array shown in Figure 24 (a) along the viewgraph of cross-section of A-A ' direction;
Figure 24 (c) shows the solar battery array shown in Figure 24 (a) along the viewgraph of cross-section of B-B ' direction.
Embodiment
The below describes embodiment of the present utility model in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the utility model, and can not be interpreted as restriction of the present utility model.
The utility model proposes a kind of be easy to configuration and application, the solar cell of low cost of manufacture, with reference to figure 8 (a)-8 (c), shown in 17 (a)-18 (b) and 24 (a)-24 (c), described solar cell comprises: solar battery array 101, described solar battery array 101 comprises a plurality of independently solar battery cell 101-1...101-4 that are set up in parallel, each battery unit comprises the first semiconductor layer, be positioned at the second following semiconductor layer, lay respectively at the first semiconductor layer upper surface, and second semiconductor layer lower surface upper, bottom electrode 102-1...102-4,103-1...103-4, can further include the insulation side wall of the described battery unit sidewall of parcel, also may further include the insulating barrier that covers described battery unit upper and lower surface.Also comprise upper conductor group 201-1,201-2 places described solar battery array 101 tops, and runs through described a plurality of battery units each; And lower wire group 202-1,202-2 places described solar battery array 101 belows, runs through each of described a plurality of battery units and arranges with described upper conductor group interval.Conducting resinl, between described upper and lower wire group and solar battery array, the upper and lower electrode of described each solar battery cell of described conducting resinl parcel.
Selectively, shown in Figure 24 (a)-24 (c), the wire of described upper and lower wire group has consistent width or inconsistent width.For example the wire of described upper and lower wire group can have the width wider than other positions with the overlapping position of solar battery cell, and do not have the thickness thicker than other positions with the overlapping position of solar battery cell.
In the described situation that has consistent width at described wire, described conducting resinl can cover the inner surface of whole described wire, shown in figure 8 (a)-8 (c), perhaps only coated electrode by the inner surface of wire of part, shown in Figure 17 (a)-17 (c).
Preferably, described upper and lower electrode wires and the bonding plate 203-1 that can also have for the contact area of raising and wire contact portion, 203-2,204-1,204-2 is shown in Figure 18 (a)-18 (c).
Different from existing solar battery structure, each solar battery cell in the solar battery array of the present utility model is independently, thereby can configure easily as required the area of solar cell.And existing solar battery sheet is carried out in the technique of bus processing, be the technology that adopts silk screen printing, because cell piece is integral structure, the conducting resinl that therefore is positioned at one side can be owing to printing penetrates into another side.But this technology can not be applied to the utility model, and battery unit of the present utility model is independently, thereby the silk screen printing meeting causes the conducting resinl of solar battery cell one side to penetrate into another side when printing the performance of solar cell is affected.And utilize the method for the conductor bus of formation solar cell of the present utility model, can avoid the generation of above-mentioned situation, make under the prerequisite that does not affect solar cell properties simultaneously that solar cell is easier to be configured, to have reduced manufacturing cost according to actual needs.
In order to understand better the technical solution of the utility model and effect, be described in detail below with reference to the formation method of accompanying drawing to the different embodiment of above-described solar cell.
The first embodiment
Referring to Fig. 1-12, Fig. 1-12 shows the pilot process according to the formation method of the solar cell of the utility model the first embodiment.At first, Fig. 1 (a) shows the vertical view according to the upper conductor 201-1 of the utility model embodiment, and Fig. 1 (b) shows along the viewgraph of cross-section of A-A ' direction among Fig. 1 (a).Shown in Fig. 1 (a), (b), at step a, the upper conductor group is provided, cover conducting resinl at the only inner surface of described upper conductor group.Particularly, in the present embodiment, described upper conductor group comprises two wire 201-1, and 201-2 is used to form the connection bus of solar battery cell.Wire can be copper cash or other conductive metallic materials of copper cash, aluminum steel, silver-colored line, parcel TiN film.In other embodiments, described upper conductor group can comprise many wires of or other quantity.The width of described wire is preferably 20 microns-300 microns, and thickness is preferably 20 microns-300 microns.Shown in Fig. 1 (a), wherein the length of wire be guide line along the numerical value that extends on the x direction of principal axis, width be guide line along on the y direction of principal axis along the numerical value that extends, thickness refers to the numerical value that extends along on the z direction of principal axis.The cross section of wire can be, but be not limited to circle, ellipse and rectangle.Shown in Fig. 2 (a), (b), the only inner surface covering conducting resinl 205-1 in described upper conductor group can adopt the method for silk screen printing to cover conducting resinl.Fig. 2 (a) shows the vertical view according to the upper conductor of the covering conducting resinl of the utility model embodiment, and Fig. 2 (b) shows along the viewgraph of cross-section of A-A ' direction among Fig. 2 (a).The inner surface of wherein said upper conductor group is the surface bonding with the solar battery array that will be described in more detail below.Described conducting resinl can be elargol or other conducting resinl.The thickness that covers conducting resinl can be complementary with the thickness of the top electrode that will be described below, and is preferably 5 microns-100 microns.
Then, shown in Fig. 3 (a), (b), at step b, the solar battery array 101 that comprises a plurality of independently solar battery cell 101-1...101-4 that are set up in parallel is provided, described each battery unit comprises the first semiconductor layer, is positioned at the second following semiconductor layer, is positioned at the top electrode 102-1...102-4 of the first semiconductor layer upper surface; Among the other embodiment, can further include the insulation side wall (scheming not shown) of the described battery unit sidewall of parcel.Wherein said term " top ", " following " have only represented the relative position relation between each parts of described solar battery cell, and do not represent its position form in resulting devices, therefore when in the forming process at solar cell described solar battery cell being carried out displacement, overturn or putting upside down, this relative position relation can not change.Integrally formed solar battery sheet different from the past, solar battery cell 101-1...101-4 in the solar battery array 101 of the present utility model is separate battery unit, and the quantity of the battery unit that comprises and the area of each battery unit can actually as required be determined.For example, the area of described solar battery cell can be 10cm x 0.15cm, and the width of described solar battery cell can be at 0.2mm between the 4mm.Certainly, the formation of described solar battery cell can be different from top description, for example described the first semiconductor layer can be N-type, and the second semiconductor layer is the P type, and perhaps conversely, the first semiconductor layer is the P type, and the second semiconductor layer is N-type, perhaps comprise other intermediate layers or doped region, these all can arrange as required, and can not become restriction of the present utility model.Described top electrode can be the finger line, and its material includes but not limited to aluminium, silver, argentalium alloy, nickel, copper etc., and its thickness is preferably 5 microns-100 microns.
Shown in Fig. 4 (a), (b), at step c, described solar battery array 101 is arranged on described upper conductor group 201-1, on the 201-2, make described upper conductor group run through each of described a plurality of battery unit 101-1...101-4, the surface that wherein said upper conductor group covers conducting resinl 205-1 contacts with the top electrode 102-1...102-4 of described solar battery cell.Especially, can with described solar battery array 101 upsets, directly be placed on described upper conductor group 201-1, on the 201-2.
After this, can dry to avoid the displacement of conducting resinl and the performance that affects solar cell on described conducting resinl 205-1.Can certainly not carry out this step, and enter following step.
In steps d, the lower surface of the second semiconductor layer of solar battery cell 101-1...101-4 forms bottom electrode 103-1...103-4 shown in Fig. 5 (a), (b), as described in each.Described bottom electrode can be the finger line, and its material includes but not limited to aluminium, silver, argentalium alloy, nickel, copper etc., and its thickness is preferably 5 microns-100 microns.
Shown in Fig. 6 (a), (b), step e, with described step a similarly, the lower wire group is provided, the method that can adopt silk screen printing covers conducting resinl at the only inner surface of described lower wire group.Particularly, in the present embodiment, described lower wire group comprises two wire 202-1, and 202-2 is used to form the connection bus of solar battery cell.In other embodiments, described lower wire group can comprise many wires of or other quantity.Wire can be copper cash or other conductive metallic materials of copper cash, aluminum steel, silver-colored line, parcel TiN film.The width of described wire is preferably 20 microns-300 microns, and thickness is preferably 20 microns-300 microns.Shown in Fig. 6 (a), wherein the length of wire be guide line along the numerical value that extends on the x direction of principal axis, width be guide line along on the y direction of principal axis along the numerical value that extends, thickness refers to the numerical value that extends along on the z direction of principal axis.Shown in Fig. 7 (a), (b), at the only inner surface covering conducting resinl 205-2 of described lower wire group.Fig. 7 (a) shows the vertical view according to the lower wire of the covering conducting resinl of the utility model embodiment, and Fig. 7 (b) shows along the viewgraph of cross-section of B-B ' direction among Fig. 7 (a).The inner surface of wherein said lower wire group is the surface bonding with solar battery array.Described conducting resinl can be elargol or other conducting resinl.The thickness that covers conducting resinl can be complementary with the thickness of bottom electrode, is preferably 5 microns-100 microns.
Subsequently at step f, shown in Fig. 8 (a)-(c), described solar battery array 101 is arranged on described lower wire group 202-1, on the 202-2, make described lower wire run through described a plurality of battery unit 101-1...101-4 each and with described upper conductor group 201-1, the 201-2 interval arranges, and the surface that wherein said lower wire group covers conducting resinl 205-2 contacts with described solar battery cell bottom electrode 103-1...103-4.
Then, can dry described conducting resinl 205-2, affect the performance of solar cell with the displacement of avoiding conducting resinl.Can certainly not carry out this step.
Selectively, shown in Fig. 9 (a), (b), in forming the step of bottom electrode, described steps d can also be formed for simultaneously improving the bonding plate 203-1...203-4 with the contact area of wire contact portion, 204-1...204-4, can certainly in described step b, form and form the bonding plate that similarly is used for improving with the contact area of wire contact portion in the step of top electrode.Described bonding plate can be silver-colored bonding plate or aluminium bonding plate etc.
Subsequently at step f, as shown in figure 10, block described upper conductor group 201-1, the end of 201-2 one side and block described lower wire group 202-1, the end of 202-2 opposite side, and shown in Figure 11-12 is in step g, form the output of solar cell.That is to say, upper conductor group 201-1, between the end of 201-2 and described lower wire group 202-1, forming conduction between the end of 202-2 connects, for example can merge the end that bends described upper and lower wire group, perhaps form conducting resinl or electric welding between the upper conductor group and/or between the lower wire group.
It more than is the formation method according to the solar cell of the present utility model of the first embodiment description of the present utility model, in the first embodiment, each root wire of the upper and lower wire group that provides in step a and step e self has consistent width, and is that whole inner surface in described upper and lower wire group covers conducting resinl among described step a and the step e.
Need to prove, in all embodiment of the present utility model and diagram, all including two wires with upper conductor group and lower wire group describes, but the utility model is not limited to this, the upper conductor group can also only comprise many wires of a wire or other quantity, same, the lower wire group also can only comprise many wires of a wire or other quantity.
The second embodiment
The below will describe the second embodiment of the present utility model with reference to the accompanying drawings, be that in the difference of the second embodiment and the first embodiment the step that covers conducting resinl in step a and step e covers conducting resinl for described upper and lower wire group being carried out patterning, the partial coverage conducting resinl that passes through with the upper and lower electrode at described upper and lower wire group and solar battery cell.
Specifically, referring to Figure 13 (a), (b) at first, at step a, the upper conductor group is provided, described upper conductor group is carried out patterning cover conducting resinl, the partial coverage conducting resinl that passes through with the top electrode at described upper conductor group and solar battery cell.Can adopt the method for silk screen printing that the upper conductor group is covered conducting resinl, then carry out the conducting resinl 205-1 that patterning comes forming section to cover.In the present embodiment, described upper conductor group comprises two wire 201-1, and 201-2 is used to form the connection bus of solar battery cell.Wire can be copper cash or other conductive metallic materials of copper cash, aluminum steel, silver-colored line, parcel TiN film.The width of described wire is preferably 20 microns-300 microns, and thickness is preferably 20 microns-300 microns.Figure 13 (a) shows the vertical view according to the upper conductor of the covering conducting resinl of the utility model embodiment, and Figure 13 (b) shows along the viewgraph of cross-section of A-A ' direction among Figure 13 (a).Described conducting resinl can be elargol or other conducting resinl.The thickness that covers conducting resinl can be complementary with the thickness of the top electrode that will be described below, and is preferably 5 microns-100 microns.
Then, at step b, the solar battery array 101 that comprises a plurality of independently solar battery cell 101-1...101-4 that are set up in parallel is provided, described each battery unit comprises the first semiconductor layer, is positioned at the second following semiconductor layer, is positioned at the top electrode 102-1...102-4 of the first semiconductor layer upper surface and the insulation side wall of the described battery unit sidewall of parcel.Wherein said term " top ", " following " have only represented the relative position relation between each parts of described solar battery cell, and do not represent its position form in resulting devices, therefore when in the forming process at solar cell described solar battery cell being carried out displacement, overturn or putting upside down, this relative position relation can not change.Integrally formed solar battery sheet different from the past, solar battery cell 101-1...101-4 in the solar battery array 101 of the present utility model is separate battery unit, and the quantity of the battery unit that comprises and the area of each battery unit can actually as required be determined.For example, the area of described solar battery cell can be 10cm x 0.15cm, and the width of described solar battery cell can be at 0.2mm between the 4mm.Certainly, the formation of described solar battery cell can be different from top description, for example described the first semiconductor layer can be N-type, and the second semiconductor layer is the P type, and perhaps conversely, the first semiconductor layer is the P type, and the second semiconductor layer is N-type, perhaps comprise other intermediate layers or doped region, these all can arrange as required, and can not become restriction of the present utility model.Described top electrode can be the finger line, and its material includes but not limited to aluminium, silver, argentalium alloy, nickel, copper etc., and its thickness is preferably 5 microns-100 microns.
Shown in Figure 14 (a), (b), at step c, described solar battery array 101 is arranged on described upper conductor group 201-1, on the 201-2, make described upper conductor group run through each of described a plurality of battery unit 101-1...101-4, the part that wherein said upper conductor group covers conducting resinl 205-1 contacts with the top electrode 102-1...102-4 of described solar battery cell.Especially, can with described solar battery array 101 upsets, directly be placed on described upper conductor group 201-1, on the 201-2.
After this, can dry to avoid the displacement of conducting resinl and the performance that affects solar cell on described conducting resinl 205-1.Can certainly not carry out this step, and enter following step.
In steps d, as shown in figure 15, form bottom electrode 103-1...103-4 at the lower surface of the second semiconductor layer of each described solar battery cell 101-1...101-4.Described bottom electrode can be the finger line, and its material includes but not limited to aluminium, silver, argentalium alloy, nickel, copper etc., and its thickness is preferably 5 microns-100 microns.
Shown in Figure 16 (a), (b), step e, with described step a similarly, the lower wire group is provided, described lower wire group is carried out patterning cover conducting resinl, the partial coverage conducting resinl 205-2 that passes through with the bottom electrode at described lower wire group and solar battery cell.Particularly, described lower wire group comprises two wire 202-1, and 202-2 is used to form the connection bus of solar battery cell.Wire can be copper cash or other conductive metallic materials of copper cash, aluminum steel, silver-colored line, parcel TiN film.The width of described wire is preferably 20 microns-300 microns, and thickness is preferably 20 microns-300 microns.Figure 16 (a) shows the vertical view according to the lower wire of the covering conducting resinl of the utility model embodiment, and Figure 16 (b) shows along the viewgraph of cross-section of A-A ' direction among Figure 16 (a).Described conducting resinl can be elargol or other conducting resinl.The thickness that covers conducting resinl can be complementary with the thickness of bottom electrode, is preferably 5 microns-100 microns.
Subsequently at step f, shown in Figure 17 (a)-(c), described solar battery array 101 is arranged on described lower wire group 202-1, on the 202-2, make described lower wire run through described a plurality of battery unit 101-1...101-4 each and with described upper conductor group 201-1, the 201-2 interval arranges, and the part that wherein said lower wire group covers conducting resinl 205-2 contacts with described solar battery cell bottom electrode 103-1...103-4.
Then, in step c, alternatively, can further dry described conducting resinl 205-2.
Selectively, shown in Figure 18 (a), (b), in forming the step of bottom electrode, described steps d can also be formed for simultaneously improving the bonding plate 203-1...203-4 with the contact area of wire contact portion, 204-1...204-4, can certainly in described step b, form and form the bonding plate that similarly is used for improving with the contact area of wire contact portion in the step of top electrode.Described bonding plate can be silver-colored bonding plate or aluminium bonding plate etc.
Subsequently step f, with the first embodiment similarly, block described upper conductor group 201-1, the end of 201-2 one side and block described lower wire group 202-1, the end of 202-2 opposite side, and in step g, form the output of solar cell.That is to say, upper conductor group 201-1, between the end of 201-2 and described lower wire group 202-1, forming conduction between the end of 202-2 connects, for example can merge the end that bends described upper and lower wire group, perhaps form conducting resinl or electric welding between the upper conductor group and/or between the lower wire group.
It more than is the formation method according to the solar cell of the present utility model of the second embodiment description of the present utility model, in the first embodiment, each root wire of the upper and lower wire group that provides in step a and step e self has consistent width, and be to cover conducting resinl on the inner surface patterning ground of described upper and lower wire group among described step a and the step e, thereby under the prerequisite that does not reduce solar cell properties, provide cost savings.
The 3rd embodiment
The below will describe the 3rd embodiment of the present utility model with reference to the accompanying drawings, the wire that is to provide in step a and step e the step of upper and lower wire group also to comprise to provide upper and lower wire group in the difference of the 3rd embodiment and the second embodiment has the width wider than other positions with the overlapping position of solar battery cell, and do not have the thickness thicker than other positions with the overlapping position of solar battery cell.And the step that covers conducting resinl covers conducting resinl for described upper and lower wire group being carried out patterning, form conducting resinl with the inner surface in the wider part of described wire, the partial coverage conducting resinl that also namely passes through at the upper and lower electrode of upper and lower wire group and solar battery cell.
Specifically, referring to Figure 19, at first, at step a, the upper conductor group is provided.In the present embodiment, described upper conductor group comprises two wire 201-1, and 201-2 is used to form the connection bus of solar battery cell.Wire can be copper cash or other conductive metallic materials of copper cash, aluminum steel, silver-colored line, parcel TiN film.The width of described wire is preferably 20 microns-300 microns, and thickness is preferably 20 microns-300 microns.Then shown in Figure 20 (a)-Figure 20 (c), utilize modular system to push the inner surface of described upper conductor group, so that the wire of upper conductor group has the width wider than other positions with the overlapping position of solar battery cell, and do not have the thickness thicker than other positions with the overlapping position of solar battery cell.Figure 20 (b) shows the vertical view according to the upper conductor after the extruding of the utility model embodiment, and Figure 20 (c) shows along the viewgraph of cross-section of A-A ' direction among Figure 20 (b).As described in then being shown in such as Figure 21 (a), (b) on the upper conductor group patterning cover conducting resinl, the partial coverage conducting resinl 205-1 that passes through with the top electrode at described upper conductor group and solar battery cell.Described conducting resinl can be elargol or other conducting resinl.The thickness that covers conducting resinl can be complementary with the thickness of bottom electrode, is preferably 5 microns-100 microns.
Then, at step b, the solar battery array 101 that comprises a plurality of independently solar battery cell 101-1...101-4 that are set up in parallel is provided, described each battery unit comprises the first semiconductor layer, is positioned at the second following semiconductor layer, is positioned at the top electrode 102-1...102-4 of the first semiconductor layer upper surface and the insulation side wall of the described battery unit sidewall of parcel.Wherein said term " top ", " following " have only represented the relative position relation between each parts of described solar battery cell, and do not represent its position form in resulting devices, therefore when in the forming process at solar cell described solar battery cell being carried out displacement, overturn or putting upside down, this relative position relation can not change.Integrally formed solar battery sheet different from the past, solar battery cell 101-1...101-4 in the solar battery array 101 of the present utility model is separate battery unit, and the quantity of the battery unit that comprises and the area of each battery unit can actually as required be determined.For example, the area of described solar battery cell can be 10cm x 0.15cm, and the width of described solar battery cell can be at 0.2mm between the 4mm.Certainly, the formation of described solar battery cell can be different from top description, for example described the first semiconductor layer can be N-type, and the second semiconductor layer is the P type, and perhaps conversely, the first semiconductor layer is the P type, and the second semiconductor layer is N-type, perhaps comprise other intermediate layers or doped region, these all can arrange as required, and can not become restriction of the present utility model.Described top electrode can be the finger line, and its material includes but not limited to aluminium, silver, argentalium alloy, nickel, copper etc., and its thickness is preferably 5 microns-100 microns.
Shown in Figure 22 (a), (b), at step c, described solar battery array 101 is arranged on described upper conductor group 201-1, on the 201-2, make described upper conductor group run through each of described a plurality of battery unit 101-1...101-4, the wider part of wherein said upper conductor group is used for holding solar battery cell, and the part that covers conducting resinl 205-1 contacts with the top electrode 102-1...102-4 of described solar battery cell.Especially, can with described solar battery array 101 upsets, directly be placed on described upper conductor group 201-1, on the 201-2.
After this, can dry to avoid the displacement of conducting resinl and the performance that affects solar cell on described conducting resinl.Can certainly not carry out this step, and enter following step.
In steps d, the lower surface of the second semiconductor layer of solar battery cell 101-1...101-4 forms bottom electrode 103-1...103-4 shown in Figure 22 (a), (b), as described in each.Described bottom electrode can be the finger line, and its material includes but not limited to aluminium, silver, argentalium alloy, nickel, copper etc., and its thickness is preferably 5 microns-100 microns.
Shown in Figure 23 (a), (b), step e, with described step a similarly, the lower wire group is provided.Particularly, described lower wire group comprises two wire 202-1, and 202-2 is used to form the connection bus of solar battery cell.Wire can be copper cash or other conductive metallic materials of copper cash, aluminum steel, silver-colored line, parcel TiN film.The width of described wire is preferably 20 microns-300 microns, and thickness is preferably 20 microns-300 microns.Then utilize modular system to push the inner surface of described lower wire group, so that the wire of lower wire group has the width wider than other positions with the overlapping position of solar battery cell, and do not have the thickness thicker than other positions with the overlapping position of solar battery cell.As described in then being shown in such as Figure 23 (a), (b) on the lower wire group patterning cover conducting resinl, the partial coverage conducting resinl 205-2 that passes through with the bottom electrode at described lower wire group and solar battery cell.Described conducting resinl can be elargol or other conducting resinl.The thickness that covers conducting resinl can be complementary with the thickness of bottom electrode, is preferably 5 microns-100 microns.
Subsequently at step f, shown in Figure 24 (a)-(c), described solar battery array 101 is arranged on described lower wire group 202-1, on the 202-2, make described lower wire group run through each and the described lower wire group 202-1 of described a plurality of battery unit 101-1...101-4, the 202-2 interval arranges, the wider part of wherein said lower wire group is used for holding solar battery cell, and the part that covers conducting resinl contacts with the bottom electrode 103-1...103-4 of described solar battery cell.
Then, in step c, alternatively, can further dry described conducting resinl.
Selectively, also can in forming the step of bottom electrode, described steps d can also be formed for simultaneously improving the bonding plate 203-1...203-4 with the contact area of wire contact portion, 204-1...204-4, can certainly in described step b, form and form the bonding plate that similarly is used for improving with the contact area of wire contact portion in the step of top electrode.Described bonding plate can be silver-colored bonding plate or aluminium bonding plate etc.
Subsequently step f, with the first embodiment similarly, block described upper conductor group 201-1, the end of 201-2 one side and block described lower wire group 202-1, the end of 202-2 opposite side, and in step g, form the output of solar cell.That is to say, upper conductor group 201-1, between the end of 201-2 and described lower wire group 202-1, forming conduction between the end of 202-2 connects, for example can merge the end that bends described upper and lower wire group, perhaps form conducting resinl or electric welding between the upper conductor group and/or between the lower wire group.
Whole embodiment of the present utility model has below been described with reference to the accompanying drawings.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (8)
1. solar cell comprises:
Solar battery array, comprise a plurality of independently solar battery cells that are set up in parallel, each battery unit comprises the first semiconductor layer, is positioned at the second following semiconductor layer, lays respectively at the upper and lower electrode of the first semiconductor layer upper surface and the second semiconductor layer lower surface;
The upper conductor group places described solar battery array top, and runs through described a plurality of battery units each;
The lower wire group places described solar battery array below, runs through each of described a plurality of battery units and arranges with described upper conductor group interval;
Conducting resinl, between described upper and lower wire group and solar battery array, the upper and lower electrode of described each solar battery cell of described conducting resinl parcel.
2. according to claim 1 solar cell, wherein: described solar battery cell has the insulating barrier of the described battery unit of parcel.
3. according to claim 1 solar cell, wherein: the width of described solar battery cell at 0.2mm between the 4mm.
4. according to claim 1 solar cell, wherein: the wire of described upper and lower wire group has consistent width.
5. according to claim 1 solar cell, wherein: the wire of described upper and lower wire group has the width wider than other positions with the overlapping position of solar battery cell, and does not have the thickness thicker than other positions with the overlapping position of solar battery cell.
6. according to claim 4 solar cell, wherein: described conducting resinl covers the inner surface of whole described wire.
7. according to claim 4 or 5 solar cell, wherein: described conducting resinl only coated electrode by the inner surface of the wire of part.
8. solar cell according to claim 1, wherein: described electrode wires also has for the bonding plate that improves with the contact area of wire contact portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220180094 CN202721135U (en) | 2012-04-06 | 2012-04-25 | Solar cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220140281.7 | 2012-04-06 | ||
| CN201220140281 | 2012-04-06 | ||
| CN 201220180094 CN202721135U (en) | 2012-04-06 | 2012-04-25 | Solar cell |
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| Publication Number | Publication Date |
|---|---|
| CN202721135U true CN202721135U (en) | 2013-02-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367509A (en) * | 2012-04-06 | 2013-10-23 | 聚日（苏州）科技有限公司 | Solar cell and formation method thereof |
| CN103606570A (en) * | 2013-11-21 | 2014-02-26 | 英利集团有限公司 | Solar cell |
| WO2016065945A1 (en) * | 2014-10-31 | 2016-05-06 | Byd Company Limited | Solar cell array, solar cell module and manufacturing method thereof |
| WO2016065933A1 (en) * | 2014-10-31 | 2016-05-06 | Byd Company Limited | Solar cell, solar cell module and manufacturing method thereof |
-
2012
- 2012-04-25 CN CN 201220180094 patent/CN202721135U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367509A (en) * | 2012-04-06 | 2013-10-23 | 聚日（苏州）科技有限公司 | Solar cell and formation method thereof |
| CN103606570A (en) * | 2013-11-21 | 2014-02-26 | 英利集团有限公司 | Solar cell |
| WO2016065945A1 (en) * | 2014-10-31 | 2016-05-06 | Byd Company Limited | Solar cell array, solar cell module and manufacturing method thereof |
| WO2016065933A1 (en) * | 2014-10-31 | 2016-05-06 | Byd Company Limited | Solar cell, solar cell module and manufacturing method thereof |
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Granted publication date: 20130206 Termination date: 20210425 |