CN103247705A - Solar panel - Google Patents

Abstract

A solar panel. The solar panel comprises a junction box and more than two photoelectric conversion assemblies; the junction box comprises more than two positive connecting ends and more than two negative connecting ends, the positive connecting ends of the junction box are respectively connected with the positive electrodes of the corresponding photoelectric conversion assemblies, and the negative connecting ends are respectively connected with the negative electrodes of the corresponding photoelectric conversion assemblies; when all the positive connecting ends of the junction box are mutually communicated and all the negative connecting ends of the junction box are also mutually communicated, all the photoelectric conversion assemblies are connected in parallel, and the output voltage of the solar panel is a first voltage; when all the positive connecting ends of the junction box are disconnected with each other and all the negative connecting ends of the junction box are also disconnected with each other, the photoelectric conversion assemblies are connected in series, and the output voltage of the solar panel is a second voltage. The solar panel realizes the switching among various voltages, increases the application elasticity of the solar panel and improves the practicability of the solar panel.

Description

Solar panels

technical field

The invention relates to the technical field of thin film solar cells, in particular to a solar panel with switchable voltage.

Background technique

Due to the large consumption of traditional energy such as oil and its limited storage capacity, and its serious pollution to the environment, people pay more and more attention to clean energy such as wind energy and solar energy. In particular, solar energy has less geographical restrictions and is rich in energy. , has increasingly become a research focus and focus.

A Chinese patent application with publication number CN101775591A discloses a thin-film solar cell. As shown in FIG. , an intrinsic amorphous silicon layer 13, a P-type amorphous silicon layer 12, a transparent electrode 11 and a glass substrate 10, wherein the P-type amorphous silicon layer 12, the intrinsic amorphous silicon layer 13 and the N-type amorphous silicon layer 14 together form an amorphous silicon photovoltaic unit.

In the working engineering of a thin-film solar cell, light is projected onto the glass substrate 10, passes through the transparent electrode 11, and reaches the amorphous silicon photovoltaic unit, which converts the light signal into an electrical signal, and the electrical signal passes through the transparent electrode. 11 and bottom electrode 15 output.

However, the voltage generated across the electrodes of a single thin-film solar cell is not enough for most purposes. Therefore, in order to obtain sufficient power and voltage, a solar panel is made into an array of many single thin-film solar cells connected in series, or it is called a module. In addition, in other applications, it is sometimes necessary to connect components in parallel to output larger currents at lower voltages.

Fig. 2 shows an embodiment of thin film solar cells connected in series. Referring to FIG. 2 , the assembly 20 is formed by a plurality of thin film solar cells 25 connected in series, and the thin film solar cells 25 are arranged side by side on a substrate 21 , and sunlight is irradiated onto the thin film solar cells 25 through the substrate 21 . Specifically, the thin-film solar cell 25 includes a transparent electrode 22 made of a transparent conductive oxide, a photovoltaic unit 23 made of a semiconductor material such as amorphous silicon hydride, and a photovoltaic cell 23 made of a metal material such as aluminum ) or a bottom electrode 24 made of a transparent material (such as tin oxide); An amorphous silicon photovoltaic unit jointly composed of an N-type amorphous silicon layer 14 .

A first groove 26 is formed between the transparent electrodes 22 of each thin film solar cell 25 , a second groove 28 is formed between the photovoltaic units 23 , and a third groove 30 is formed between the bottom electrodes 24 . Wherein, the semiconductor material in the photovoltaic unit 23 is filled in the first groove 26, so that the transparent electrodes 22 are electrically insulated from each other; The adjacent photovoltaic units 23 are isolated from each other, and the transparent electrodes 22 and the bottom electrodes 24 of the photovoltaic units 23 are connected in series; while the adjacent bottom electrodes 24 are separated by the third groove 30 , electrically insulated from each other.

In the assembly structure shown in Figure 2, by forming a conductive strip (contactstrip, not shown in Figure 2) on the outermost battery, the voltage value of the thin-film solar cells connected in series can be obtained, that is, the final output voltage is each The sum of the voltages of thin-film solar cells.

However, in some other applications, a smaller voltage but a larger current may be required. At this time, multiple components need to be connected in parallel. Generally, the conductive strips corresponding to the positive poles of the components can be connected together, and the The conductive strips corresponding to the negative poles of the components are connected together.

Fig. 3 shows an embodiment of parallel connection of thin film solar cells. Referring to FIG. 3 , the substrate 60 includes modules 31 , 41 respectively including a plurality of thin film solar cells, and its structure is similar to that of the module 20 in FIG. 2 . Conductive strips 32 and 33 are respectively formed on the positive and negative positions of the component 31 ; conductive strips 42 and 43 are respectively formed on the positive and negative positions of the component 41 . In order to connect the components 31 and 41 in parallel, it is necessary to connect the conductive strip 32 on the positive pole position of the component 31 and the conductive strip 42 on the positive pole position of the component 41 correspondingly, and at the same time connect the conductive strip 33 on the negative pole position of the component 31 and the negative pole position of the component 41 The conductive strips 43 on the top are connected correspondingly, and the specific external connection method can refer to the equivalent schematic diagram in FIG. 4 .

With reference to FIG. 4 , the connecting line 51 connects the positive poles of the components 31, 41, and the connecting line 52 connects the negative poles of the components 31, 41, so that the components 31 and 41 are connected in parallel, so that the final output voltage is equivalent The voltage value of a component 31 or component 41.

However, the solar panels in the above prior art cannot switch or adjust the voltage. Therefore, how to realize the voltage regulation of thin film solar panels and optimize the production of thin film solar cells has become one of the problems to be solved urgently by those skilled in the art.

Contents of the invention

The problem solved by the present invention is to provide a solar panel with adjustable voltage, so as to effectively optimize the production of the solar panel and improve the practicability of the solar panel.

In order to solve the above problems, the present invention provides a solar panel, comprising: a junction box and more than two photoelectric conversion components; The positive connection terminals of the box are respectively connected to the positive terminals of the corresponding photoelectric conversion components, and the negative connection terminals are respectively connected to the negative terminals of the corresponding photoelectric conversion components; wherein, when all the positive connection terminals of the junction box are connected to each other and all the negative connection terminals are also When connected to each other, each photoelectric conversion assembly is connected in parallel, and the output voltage of the solar panel is the first voltage; when all the positive connection terminals of the junction box are disconnected from each other and all the negative connection terminals are also disconnected from each other, each The photoelectric conversion components are connected in series, and the output voltage of the solar panel is a second voltage; the first voltage is smaller than the second voltage.

Optionally, the photoelectric conversion assembly includes at least two subassemblies, the positive pole of the subassembly corresponds to the positive connection end of the junction box, and the negative pole corresponds to the negative connection end of the junction box. When the positive connection ends of the junction box are connected to each other and When the negative connection terminals are also connected to each other, the subassemblies are connected in parallel and the photoelectric conversion assembly outputs the first sub-voltage; when the positive connection terminals of the junction box are disconnected from each other and the negative connection terminals are also disconnected from each other, the subassemblies are connected in series And the photoelectric conversion component outputs a second sub-voltage.

Optionally, the conduction or disconnection of the positive terminal and the negative terminal in the junction box are controlled by electronic switches or manual switches.

Optionally, the electronic switch is a MOS transistor.

Optionally, the photoelectric conversion assembly is composed of a plurality of thin film solar cell units connected in series.

Optionally, the number of multiple thin-film solar cell units contained in each photoelectric conversion module is the same.

Optionally, conductive strips are respectively formed at the positive pole position and the negative pole position of the photoelectric conversion component, the positive pole connection ends in the junction box are respectively connected to the conductive strips at the positive pole position of the photoelectric conversion component, and the negative pole connection ends are respectively connected to the negative pole of the photoelectric conversion component location of the conductive tape.

Optionally, the positive connection end of the junction box is connected to the positive electrode of the corresponding photoelectric conversion assembly through a wire; the negative connection end of the junction box is connected to the negative electrode of the corresponding photoelectric conversion assembly through a wire.

Optionally, the positive and negative electrodes of the junction box are connected to the wires by welding, and the positive and negative electrodes of the photoelectric conversion component are also connected to the wires by welding.

Optionally, the second voltage is N times the first voltage, where N is a natural positive integer greater than 1.

Compared with the prior art, the solar panel disclosed in this technical solution has at least the following advantages:

1) In the solar panel of the present invention, more than two photoelectric conversion components are included, the positive poles of each photoelectric conversion component are respectively connected to the positive terminal of the junction box, and the negative poles are correspondingly connected to the negative terminal of the junction box. When the connection terminals are connected to each other and the negative connection terminals are also connected to each other, the photoelectric conversion components are connected in parallel, and when the positive connection terminals of the junction box are disconnected from each other and the negative connection terminals are also disconnected, the photoelectric conversion components are connected in series. In this way, the voltage adjustment of the solar panel is realized, so that the solar panel meets the requirements of various occasions to the greatest extent, thereby increasing the application flexibility of the solar panel, and further improving the practicability of the solar panel.

2) In addition, the present invention can also optimize the manufacturing process of solar panels. This is because the solar panels of the present invention are no longer connected in parallel through internal connections, but only through the conduction or disconnection of switches in the junction box to meet the needs of multiple voltages, thus simplifying production when making solar panels steps to improve production efficiency.

Description of drawings

Fig. 1 is the structural representation of an embodiment of existing thin-film solar cell;

Fig. 2 is the schematic diagram of an embodiment of existing thin-film solar cells connected in series;

Fig. 3 is the schematic diagram of an embodiment of existing parallel connection of thin-film solar cells;

Fig. 4 is the equivalent schematic diagram of parallel connection of thin-film solar cells shown in Fig. 3;

Fig. 5 and Fig. 6 are the structural schematic diagrams of embodiment one of the solar panel of the present invention;

Fig. 7 and Fig. 8 are the structural representations of the second embodiment of the solar panel of the present invention;

9 to 11 are schematic structural views of Embodiment 3 of the solar panel of the present invention.

Detailed ways

The inventors of the present invention found that although thin-film solar cells can be connected in series or in parallel in the prior art to meet certain practical needs, these series or parallel methods can only output one voltage and cannot realize voltage regulation. After the above-mentioned thin-film solar cells are produced, the series and parallel relationships among the components are determined, and the final output voltage cannot be changed.

However, the voltages required in practical applications are not the same. Under the existing technology, in order to meet these requirements, it is necessary to produce various types of solar panels with different output voltages. This is not conducive to the optimal production of thin-film solar cells, increases the manufacturing cost of solar panels, and also reduces the practicability of thin-film solar cells.

In the solar panel provided by the present invention, the positive and negative poles of the photoelectric conversion components are respectively connected to the positive and negative terminals of the junction box, and the photoelectric conversion can be realized conveniently by controlling the conduction or disconnection of the positive and negative terminals of the junction box The series or parallel connection of components can conveniently realize the voltage regulation of the solar panel, thereby meeting the needs of various occasions, increasing the application flexibility of the solar panel, and improving the practicability of the solar panel.

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. Herein, "above" includes this number.

In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.

Embodiment one

Referring to FIG. 5 and FIG. 6 , the solar panel of this example includes: a substrate 100 , a junction box 130 , and a photoelectric conversion assembly 110 and a photoelectric conversion assembly 120 formed on the substrate 100 . The photoelectric conversion component 110 and the photoelectric conversion component 120 are jointly formed on the same substrate 100 .

The photoelectric conversion assembly 110 and the photoelectric conversion assembly 120 respectively include the same number of multiple thin film solar cell units. Since the photoelectric conversion component 110 and the photoelectric conversion component 120 include the same number of thin-film solar cells and the same manufacturing process, the voltage of the photoelectric conversion component 110 is equal to the voltage of the photoelectric conversion component 120 . For the convenience of the following description, the voltage of the photoelectric conversion component 110 is defined as V1, and the voltage of the photoelectric conversion component 120 is also V1.

Of course, in other embodiments, the number of thin-film solar cells included in the photoelectric conversion assembly 110 and the photoelectric conversion assembly 120 may not be exactly the same, as long as the voltage and current generated by the two photoelectric conversion assemblies are the same. . Or, further, the voltage and current generated by the photoelectric conversion component 110 and the photoelectric conversion component 120 may also have a certain deviation, as long as the difference between the voltage and the difference between the currents does not exceed a predetermined range.

As a specific example, the photoelectric conversion assembly 110 includes 10,000 thin-film solar cell units, and the photoelectric conversion assembly 120 includes 10,001 thin-film solar cell units, although the voltage and current generated by the two photoelectric conversion assemblies are not exactly the same , but since the voltage difference and current difference between the two photoelectric conversion components are very small, the solar panel with this structure should also fall within the protection scope of the present invention.

The thin-film solar cell unit in this embodiment is similar to the thin-film solar cell in the prior art, so details will not be repeated here. It can be understood that, in practical applications, those skilled in the art can set the number of thin-film solar cells contained in the photoelectric conversion module 110 and the photoelectric conversion module 120 according to actual needs, so as to generate voltage and power that meet the requirements.

The photoelectric conversion component 110 is formed with a conductive strip 112 at the anode position, and a conductive strip 113 at the negative pole position; the photoelectric conversion component 120 is formed with a conductive strip 122 at the positive pole position, and a conductive strip 123 is formed at the negative pole position. In this embodiment, the material of the conductive strips 112, 113, 122, 123 can be copper, aluminum and other metals, but in other embodiments, other conductive materials can also be used to form the conductive strips, which should not Limit the protection scope of the present invention. The formation method of the conductive strip in this embodiment is similar to that in the prior art, so it will not be repeated here.

The junction box 130 includes positive connection terminals 1 , 2 and negative connection terminals 3 , 4 .

In this embodiment, the connection or disconnection between the positive connection terminals 1 and 2 of the junction box 130, and the connection or disconnection between the negative connection terminals 3 and 4 can be controlled by a switch (not shown in the figure). control. The switches may be electronic switches, such as MOS transistors, but this should not limit the scope of protection of their invention. Those skilled in the art can use other forms of switches or even manual switches to replace the MOS transistors.

In this embodiment, the positive connection terminal 1 is connected to the conductive strip 112 at the positive position of the photoelectric conversion component 110, and the positive connection terminal 2 is connected to the conductive strip 122 at the positive position of the photoelectric conversion component 120; the negative connection terminal 3 is connected to the photoelectric conversion component 110 The conductive strip 113 at the negative pole position, and the negative pole connection terminal 4 is connected to the conductive strip 123 at the negative pole position of the photoelectric conversion module 120 . The positive connection terminal 1 and the negative connection terminal 4 of the junction box 130 are led out to generate the output voltage of the solar panel.

Certainly, the connection relationship between the positive and negative terminals of the junction box and the conductive strip is only for illustration, and in other embodiments, other connection relationships may also be adopted. For example, connect the positive terminal 1 of the junction box 130 to the conductive strip 122 at the positive position of the photoelectric conversion assembly 120, connect the positive connection terminal 2 of the junction box 130 to the conductive strip 112 at the positive position of the photoelectric conversion component 110; connect the junction box 130 The negative terminal 3 of the junction box 130 is connected to the conductive strip 123 at the negative position of the photoelectric conversion module 120, and the negative terminal 4 of the junction box 130 is connected to the conductive strip 113 at the negative position of the photoelectric conversion component 110. In this connection mode, the positive terminal 2 and the negative terminal 3 of the junction box 130 are drawn out to generate the output voltage of the solar panel. Of course, those skilled in the art can also adopt other connection relationships. As long as they do not violate the spirit of the present invention, all deformations made to the connection relationship between the positive and negative connection ends of the junction box and the conductive strips of the photoelectric conversion assembly belong to this invention. protection scope of the invention.

In this embodiment, the positive and negative terminals of the junction box 130 are connected to the conductive strips of the photoelectric conversion components 110 and 120 by wires, and the wire connection can be realized by welding. However, the connection method in this embodiment is only for illustration and should not limit the protection scope of the present invention. In other embodiments, those skilled in the art may also adopt other possible connection methods.

Referring to Fig. 5, when the positive connection terminals 1, 2 and the negative connection terminals 3, 4 of the junction box 130 are all disconnected, the photoelectric conversion assembly 110 and the photoelectric conversion assembly 120 are in a series state, therefore, the output voltage on the solar panel is the first The two voltages are the sum of the voltage ( V1 ) of the photoelectric conversion component 110 and the voltage ( V1 ) of the photoelectric conversion component 120 , that is, the output voltage of the solar panel is 2V1 at this time.

Referring to FIG. 6 , when the positive connection terminals 1 and 2 of the junction box 130 communicate with each other, and the negative connection terminals 3 and 4 thereof communicate with each other, the positive pole of the photoelectric conversion assembly 110 is connected to the positive pole of the photoelectric conversion assembly 120, and the photoelectric conversion The negative pole of the component 110 is connected to the negative pole of the photoelectric conversion component 120 , so that the photoelectric conversion component 110 and the photoelectric conversion component 120 are connected in parallel. At this time, the output voltage of the solar panel is the first voltage, that is, the voltage V1 of the photoelectric conversion component 110 , or the voltage V1 of the photoelectric conversion component 120 . At this time, the positive terminal 1 connects all the positive poles of the entire solar panel and the external positive wiring of the junction box (not shown in the figure), and the negative terminal 4 connects all the negative poles of the entire solar panel and the external negative wiring of the junction box ( not shown in the figure).

It can be seen from the above analysis that the output voltage of the solar panel shown in FIG. 6 is half of the output voltage of the solar panel shown in FIG. 5 .

In this embodiment, by operating the positive and negative terminals in the junction box 130, the voltage switching of the solar panel is realized, that is, the voltage of the solar panel can be switched between the second voltage 2V1 and the first voltage V1, Therefore, the requirements of more occasions are met, thereby increasing the application range of the solar panel and improving the applicability of the solar panel.

Embodiment two

Referring to FIG. 7 and FIG. 8 , the solar panel of this embodiment includes: a substrate 200 ; a junction box 240 ; and photoelectric conversion components 210 , 220 , 230 located on the substrate 200 .

Compared with Embodiment 1, the difference of this embodiment is that the number of photoelectric conversion components included on the substrate 200 is three, that is, the photoelectric conversion component 210, the photoelectric conversion component 220, and the photoelectric conversion component 230 in this embodiment; Ground, there are six positive and negative connection terminals in the junction box 240 in this embodiment. Other structures in this embodiment are similar to those in Embodiment 1, so details will not be repeated here.

Similar to the photoelectric conversion module 110 and the photoelectric conversion module 120 in the first embodiment, the photoelectric conversion modules 210 , 220 , and 230 in this embodiment also respectively include the same number of thin-film solar cell units. Since the photoelectric conversion components 210 , 220 , 230 include the same number of thin-film solar cells and the same manufacturing process, the voltages of the photoelectric conversion components 210 , 220 , 230 are also equal. For the convenience of the following description, the voltages of the photoelectric conversion components 210 , 220 , and 230 are respectively defined as V2 .

The thin-film solar cell unit in this embodiment is similar to the thin-film solar cell in the prior art, so details will not be repeated here. It can be understood that in practical applications, those skilled in the art can set the number of thin-film solar cell units contained in the photoelectric conversion assembly 210, the photoelectric conversion assembly 220, and the photoelectric conversion assembly 230 according to actual needs, so as to generate voltages that meet the requirements. ,power.

The positive electrode position of the photoelectric conversion component 210 is formed with a conductive strip 212, and the negative pole position is formed with a conductive strip 213; the positive pole position of the photoelectric conversion component 220 is formed with a conductive strip 222, and the negative pole position is formed with a conductive strip 223; the photoelectric conversion A conductive strip 232 is formed at the positive pole position of the assembly 230 , and a conductive strip 233 is formed at the negative pole position. The material and formation method of the conductive strip in this embodiment are similar to those of the conductive strip in Embodiment 1, so details will not be repeated here.

The junction box 240 includes positive terminal A, B, C and negative terminal D, E, F.

Similar to the junction box 130 in Embodiment 1, in this embodiment, the connection or disconnection between the positive connection terminals A, B, and C of the junction box 240, and the connection between the negative connection terminals D, E, and F or disconnection can be controlled by a switch (not shown in the figure). The switches may be electronic switches, such as MOS transistors, but this should not limit the scope of protection of their invention. Those skilled in the art can use other forms of switches or even manual switches to replace the MOS transistors.

In this embodiment, the positive connection terminal A of the junction box 240 is connected to the conductive strip 212 at the positive position of the photoelectric conversion component 210, the positive connection terminal B is connected to the conductive strip 222 at the positive position of the photoelectric conversion component 220, and the positive connection terminal C is connected to the photoelectric conversion The conductive tape 232 at the positive position of the component 230; the negative connection end D of the junction box 240 is connected to the conductive tape 213 at the negative position of the photoelectric conversion assembly 210, the negative connection end E is connected to the conductive tape 223 at the negative position of the photoelectric conversion assembly 220, and the negative connection end F is connected to the conductive strip 233 at the cathode position of the photoelectric conversion component 230 . The positive terminal A and the negative terminal F of the junction box 240 are led out to generate the output voltage of the solar panel.

Similar to Embodiment 1, those skilled in the art can also adopt other connection methods, as long as the spirit of the present invention is not violated, the connection relationship between the positive and negative connection ends of the junction box and the conductive strips of the photoelectric conversion assembly is made The deformation of all belongs to the protection scope of the present invention.

In this embodiment, the positive and negative terminals of the junction box 240 and the conductive strips of the photoelectric conversion components 210, 220, 230 are also connected by wires, and similar to the wire connection method in Embodiment 1, welding can also be used. way to realize the wire connection. However, the connection method in this embodiment is only for illustration and should not limit the protection scope of the present invention. In other embodiments, those skilled in the art may also adopt other possible connection methods.

The process of realizing the voltage switching of the solar panel of this embodiment will be described in detail below with reference to FIG. 7 and FIG. 8 .

Referring to FIG. 7, when the positive connection terminals A, B and C of the junction box 240 and the negative connection terminals D, E and F are all disconnected, the photoelectric conversion assemblies 210, 220 and 230 are in a series state, therefore, the solar panel The output voltage is the first voltage, which is the sum of the voltages of the three photoelectric conversion components, that is to say, the output voltage of the solar panel at this time is 3V2.

Referring to FIG. 8, when the positive connection ends A, B, and C of the junction box 240 are connected to each other, and the negative connection ends D, E, and F thereof are connected to each other, the positive electrode of the photoelectric conversion assembly 210, the positive electrode of the photoelectric conversion assembly 220, and The positive poles of the photoelectric conversion components 230 are connected, and the negative poles of the photoelectric conversion components 210, 220 and 230 are connected, so that the photoelectric conversion components 210, the photoelectric conversion components 220, and the photoelectric conversion components 230 are connected in parallel. At this time, the output voltage of the solar panel is the first voltage, that is, the voltage of one of the photoelectric conversion components, that is, the output voltage of the solar panel at this time is V2.

It can be seen from the above analysis that the output voltage of the solar panel shown in FIG. 8 is one-third of the output voltage of the solar panel shown in FIG. 7 .

In this embodiment, by operating the positive and negative terminals in the junction box 240, the voltage switching of the solar panel is realized, that is, the voltage of the solar panel can be switched between the second voltage 3V2 and the first voltage V2, Therefore, the requirements of more occasions are met, thereby increasing the application range of the solar panel and improving the applicability of the solar panel.

Embodiment three

9, FIG. 10, and FIG. 11, the solar panel of this example includes: a substrate 300; a junction box 350; photoelectric conversion assemblies 301, 302 formed on the substrate 300, wherein the photoelectric conversion assembly 301 includes subassemblies 310, 320. The photoelectric conversion component 302 includes subcomponents 330 and 340.

Compared with Embodiment 1, the difference of this embodiment is that two photoelectric conversion assemblies 301 and 302 are formed on the substrate 300, and the photoelectric conversion assemblies 301 and 302 respectively include two subassemblies, that is, subassemblies 310, 320 , 330 , 340 ; correspondingly, the junction box 350 includes eight connection terminals, which are positive connection terminals a, b, c, d and negative connection terminals e, f, g, h. Other structures of this embodiment are similar to those of Embodiment 1, so details will not be repeated here.

In this embodiment, the subassembly 310 , the subassembly 320 , the subassembly 330 and the subassembly 340 respectively include the same number of multiple thin film solar cell units. Since the subassembly 310, the subassembly 320, the subassembly 330, and the subassembly 340 include the same number of thin-film solar cells and the manufacturing process is the same, the voltages of the subassembly 310, the subassembly 320, the subassembly 330, and the subassembly 340 are also equal. . For the convenience of the following description, the voltage of the subassembly 310 , the subassembly 320 , the subassembly 330 and the subassembly 340 is defined as V3.

Specifically, in this embodiment, the positive pole position of the subassembly 310 is formed with a conductive strip 312, and the negative pole position is formed with a conductive strip 313; the subassembly 320 is formed with a conductive strip 322 at the positive pole position, and a conductive strip 322 is formed at the negative pole position. Belt 323; the positive pole position of the subassembly 330 is formed with a conductive strip 332, and the negative pole position is formed with a conductive strip 333; the positive pole position of the subassembly 340 is formed with a conductive strip 342, and the negative pole position is formed with a conductive strip 343. The material and formation method of the conductive strip in this embodiment are similar to those of the conductive strip in the foregoing embodiments, so details will not be repeated here.

In this structure, the anode of the subassembly 310 is equivalent to the anode of the photoelectric conversion assembly 301, and the anode of the subassembly 320 is equivalent to the anode of the photoelectric conversion assembly 301; the anode of the subassembly 330 is equivalent to the anode of the photoelectric conversion assembly 302, The negative electrode of the subassembly 340 is equivalent to the negative electrode of the photoelectric conversion assembly 302 .

The junction box 350 includes positive connection terminals a, b, c, d and negative connection terminals e, f, g, h.

In this embodiment, the connection or disconnection between the positive connection terminals a, b, c, and d of the junction box 350, and the connection or disconnection between the negative connection terminals e, f, g, and h can all be adopted. Switch (not shown in the figure) control. The switches may be electronic switches, such as MOS transistors. Similar to the foregoing two embodiments, those skilled in the art may use other forms of switches or even manual switches to replace the MOS transistors.

In this embodiment, the positive terminal a of the junction box 350 is connected to the conductive strip 312 at the positive position of the subassembly 310, the positive connection terminal b is connected to the conductive strip 322 at the positive position of the subassembly 320, and the positive connection terminal c is connected to the positive terminal of the subassembly 330. position of the conductive strip 332, the positive connection terminal d is connected to the conductive strip 342 at the positive position of the subassembly 340; the negative connection terminal e of the junction box 350 is connected to the conductive strip 313 at the negative position of the subassembly 310, and the negative connection terminal f is connected to the subassembly 320 The conductive strip 323 at the negative pole position, the negative pole connection terminal g is connected to the conductive strip 333 at the negative pole position of the subassembly 330 , and the negative pole connection terminal h is connected to the conductive strip 343 at the negative pole position of the subassembly 340 . The positive terminal a and the negative terminal h of the junction box 350 are led out to generate the output voltage on the solar panel. In this connection mode, the positive pole of the photoelectric conversion component 301 is connected to the positive terminal a of the junction box 350, the negative pole of the photoelectric conversion component 301 is connected to the negative terminal f of the junction box 350; and the positive pole of the photoelectric conversion component 302 is connected to the terminal The positive terminal c of the box 350 is connected, and the negative terminal of the photoelectric conversion assembly 302 is connected to the negative terminal h of the junction box 350 .

The process of realizing voltage switching by the solar panel of this embodiment will be described in detail below with reference to FIG. 9 , FIG. 10 , and FIG. 11 .

Referring to FIG. 9, when the positive connection terminals a, b, c, d of the junction box 350, and the negative connection terminals e, f, g, h are all disconnected, the photoelectric conversion assemblies 301, 302 are in a series state, and the subassembly 310 , 320, 330, 340 are also in a series connection state, and at this time, the photoelectric conversion components 301, 302 respectively output the second sub-voltage 2V3. Therefore, the output voltage on the solar panel is the sum of the voltages of the four subassemblies. It can also be said that the output voltage on the solar panel is the sum of the output voltages of the two photoelectric conversion components, that is, the output voltage on the solar panel at this time is 4V3.

Referring to FIG. 10 , when the positive connection terminals a and c of the junction box 350 communicate with each other, and the negative connection terminals f and h of the junction box 350 communicate with each other, the positive pole of the photoelectric conversion assembly 301 is connected to the positive pole of the photoelectric conversion assembly 302, and the photoelectric conversion The negative pole of the component 301 is connected to the negative pole of the photoelectric conversion component 302 . In this way, the photoelectric conversion component 301 and the photoelectric conversion component 302 are in parallel state. And because the positive connection terminals a, b are not connected, and the negative connection terminals e, f are not connected, therefore, the subassembly 310 and the subassembly 320 are in a series state; similarly, since the positive connection terminals c, d are not connected, and the negative The connection ends g and h are not connected, therefore, the subassembly 330 and the subassembly 340 are also in a serial state. Then, the voltage of the photoelectric conversion component 301 and the photoelectric conversion component 302 at this time is still the second sub-voltage, that is, equal to the sum of the voltages of the two sub-components 2V3, and the output voltage on the solar panel is equal to the voltage of the photoelectric conversion component. The voltage of 301, or in other words, is equal to the voltage of the photoelectric conversion component 302, that is, the output voltage of the solar panel at this time is 2V3.

It can be known from the above analysis that the output voltage of the solar panel shown in FIG. 10 is half of the output voltage of the solar panel shown in FIG. 9 .

Referring to FIG. 11 , when the positive connection ends a, b, c, and d of the junction box 350 communicate with each other, and the negative connection ends e, f, g, and h of the junction box 350 communicate with each other, the positive pole of the subassembly 310 and the subassembly 320 The positive pole, the positive pole of the subassembly 330 and the positive pole of the subassembly 340 are connected; In this way, the subassembly 310, the subassembly 320, the subassembly 330, and the subassembly 340 are respectively connected in parallel. At this time, the photoelectric conversion components 301 and 302 respectively output the first sub-voltage V3, and the output voltage on the solar panel is equal to the voltage of one of the sub-components or the voltage of one photoelectric conversion component, that is, the output voltage on the solar panel at this time for V3.

From the above analysis, it can be known that the output voltage of the solar panel shown in FIG. 11 is a quarter of the output voltage of the solar panel shown in FIG. 9 .

Therefore, in this embodiment, by operating the positive and negative terminals in the junction box 350, the mutual switching between various voltages of the solar panel can be realized, that is, the voltage of the solar panel can be set between 4V3, 2V3 or V3. Switching is performed to meet the needs of more occasions, thereby increasing the application range of the solar panel and improving the applicability of the solar panel.

According to the third embodiment, for positive or negative connection terminals with relatively large numbers (such as 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, etc.), and in the photoelectric conversion assembly For solar panels that also include subassemblies, the subassemblies in the photoelectric conversion assembly can be connected in series or in parallel by connecting or disconnecting the corresponding switches, so as to output some intermediate voltages, wherein the intermediate voltage is greater than the first voltage and less than the second voltage.

Specifically, in the third embodiment, the voltage (4V3) output by the solar panel shown in FIG. 9 can be defined as the second voltage; the voltage (2V3) output by the solar panel shown in FIG. 10 can be defined as the middle Voltage; the voltage output by the solar panel shown in FIG. 11 is defined as a first voltage ( V3 ).

The three implementations of the solar panel of the present invention have been introduced above, but they should not limit the protection scope of the present invention. Those skilled in the art can also form a More photoelectric conversion components, each photoelectric conversion component can also include one or more sub-components, and by rationally setting the connection relationship between the positive and negative terminals in the junction box and the conductive strips in each photoelectric conversion component or sub-component to form more different voltage switching method.

To sum up, the solar panel disclosed above has at least the following beneficial effects:

1) The solar panel of the present invention includes more than two photoelectric conversion components, and the positive poles of each photoelectric conversion component are respectively connected to the positive connection ends in the junction box, and the negative poles are respectively connected to the negative connection ends in the junction box; When the positive connection ends of the junction boxes are connected to each other and the negative connection ends are also connected to each other, each photoelectric conversion module is connected in parallel, and when the positive connection ends of the junction box are disconnected from each other and the negative connection ends are also disconnected, each The photoelectric conversion components are connected in series. Therefore, switching between different voltages can be realized, thereby meeting the voltage requirements of different occasions in a wider range, increasing the application flexibility of the solar panel, and further improving the practicability of the solar panel.

2) Since the solar panel of the present invention can switch between various voltages through an external junction box, the production process of the solar panel is simplified during the manufacturing process, and the production efficiency is improved.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (10)

1. solar panels is characterized in that, comprising: terminal box and plural photoelectric conversion component; Described terminal box comprises plural anode connection terminal, plural negative pole link, and the anode connection terminal of described terminal box connects the positive pole of corresponding photoelectric conversion component respectively, and the negative pole link connects the negative pole of corresponding photoelectric conversion component respectively;

Wherein, when whole anode connection terminal of described terminal box is interconnected and whole negative pole link when also being interconnected, each photoelectric conversion component parallel connection, and the output voltage of described solar panels is first voltage; When whole anode connection terminal of described terminal box disconnects and whole negative pole link when also disconnecting mutually mutually, each photoelectric conversion component series connection, and the output voltage of described solar panels is second voltage; Described first voltage is less than described second voltage.

2. solar panels as claimed in claim 1, it is characterized in that, described photoelectric conversion component comprises two sub-components at least, the anodal corresponding anode connection terminal that connects terminal box of described sub-component, the corresponding negative pole link that connects terminal box of negative pole, when the anode connection terminal of terminal box is interconnected and negative pole link when also being interconnected, the in parallel and described photoelectric conversion component of described sub-component is exported the first sub-voltage; When the anode connection terminal of terminal box disconnects and negative pole link when also disconnecting mutually mutually, described sub-component series connection and described photoelectric conversion component are exported the second sub-voltage.

3. solar panels as claimed in claim 1 is characterized in that, the conducting of the anode connection terminal in the terminal box and negative pole link or disconnection are controlled by electronic switch or hand switch.

4. solar panels as claimed in claim 3 is characterized in that, described electronic switch is MOS transistor.

5. solar panels as claimed in claim 1 is characterized in that, described photoelectric conversion component is made up of a plurality of thin-film solar cells unit that is cascaded.

6. solar panels as claimed in claim 5 is characterized in that, the quantity of a plurality of thin-film solar cells unit that comprises in each described photoelectric conversion component is identical.

7. solar panels as claimed in claim 1, it is characterized in that, anodal position and the negative pole position of described photoelectric conversion component are formed with conductive strips respectively, anode connection terminal in the terminal box is the corresponding conductive strips that connect the anodal position of photoelectric conversion component respectively, and the negative pole link is the corresponding conductive strips that connect photoelectric conversion component negative pole position respectively.

8. as claim 1 or 7 described solar panels, it is characterized in that the anode connection terminal of described terminal box connects by lead with the positive pole of corresponding photoelectric conversion component; The negative pole link of described terminal box connects by lead with the negative pole of corresponding photoelectric conversion component.

9. solar panels as claimed in claim 8 is characterized in that, the anode connection terminal of terminal box links to each other by welding manner with lead with the negative pole link, and the positive pole of photoelectric conversion component also links to each other by welding manner with lead with negative pole.

10. solar panels as claimed in claim 1 is characterized in that, the N that described second voltage is described first voltage times, wherein, N is the natural positive integer greater than 1.

Images