Solar energy module

Abstract

To provide a solar energy module.SOLUTION: A solar energy module includes a plurality solar energy battery cells and a mount plate. The mount plate includes a front cover plate and a rear cover plate. In each solar energy battery cell, a plurality of solar energy battery strings are defined by serial connection welding. By serial connection with a predetermined gap distance in a first direction, each solar energy battery string set is formed. When the width in the first direction is a first length and the length in a second direction is a second length, the ratio between the second length and the first length is more than 10. The solar energy module crimps the solar energy battery string sets between the front cover plate and the rear cover plate through a plurality of bus ribbons.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to the field of solar energy technology, and in particular to solar energy modules. [Background technology]

[0002] In response to the global trend towards net-zero energy buildings, the technology of integrating solar energy into building structures is becoming increasingly common, but building-integrated solar energy modules used in light-transmitting glass curtain walls and balcony light fences must also be visually transparent. Summary of the Invention [Problem to be solved by the invention]

[0003] As shown in Figure 1, in a conventional see-through silicon crystalline solar energy module battery cell layout, a solar energy module 100 includes rectangular battery cells 110, battery strings 120, bus ribbons 130, a junction box 140, and electrical cables 150. The silicon crystalline solar energy battery cells are cut into rectangular battery cells 110, and the rectangular battery cells 110 are then connected in series to form battery strings 120. The battery strings 120 are then welded in series to form the internal circuit of the solar energy module 100. However, due to the width of the solar energy module, the total number of series-connected rectangular battery cells 110 is likely to be excessive, resulting in an unnecessarily high series connection voltage. Alternatively, the total number of narrow rectangular battery cells 110 connected in series must be reduced to avoid excessive series connection voltage. Therefore, it is practically very difficult to convert conventional rectangular battery cells into a see-through solar energy module 100.

[0004] Therefore, overcoming the various drawbacks of the above-mentioned prior art has become an extremely important problem to be solved in this field. [Means for solving the problem]

[0005] In view of the drawbacks of the prior art, the present invention solves the technical problems faced by the conventional see-through solar energy module by using a new solar energy battery cell layout design method to simultaneously improve the see-through and output power of the solar energy module. The present invention provides a solar energy module, comprising: a plurality of solar energy battery cells defined by series connection welding, each solar energy battery string set being formed by being connected in series at a predetermined interval in a first direction, the width in the first direction being a first length and the length in the second direction being a second length, the ratio of the second length to the first length being greater than 10; and a mounting plate including a front cover plate and a rear cover plate, the plurality of solar energy battery string sets being pressed between the front cover plate and the rear cover plate by a plurality of bus ribbons in a series / parallel connection, the solar energy battery string sets on both sides of each bus ribbon being connected in series, and the solar energy battery string sets between two bus ribbons being connected in parallel.

[0006] In the solar energy module, bonding interlayers are formed between the front cover plate, the rear cover plate and the plurality of solar energy cell string sets.

[0007] In the above solar energy module, the front cover plate and the rear cover plate are made of transparent material.

[0008] In the above solar energy module, the transparent material is glass or resin.

[0009] In the above solar energy module, the first length is greater than 7 mm.

[0010] In the above solar energy module, the total number of the solar energy battery cells in each of the solar energy battery string sets does not exceed 100.

[0011] In the above solar energy module, the predetermined spacing distance is less than 3 mm.

[0012] The above solar energy module further includes at least one bypass diode electrically connected between each two bus ribbons.

[0013] The solar energy module further includes an electrical cable electrically connected to one end of the at least one bypass diode, and a terminal electrically connected to the other end of the at least one bypass diode. [Effects of the Invention]

[0014] In view of the above, the solar module of the present invention mainly cuts the solar battery cells so that the ratio of the second length to the first length is greater than 10, and connects the solar battery string sets in series at a predetermined interval in the first direction, so as not to affect visibility when applied to a glass curtain wall. In addition, by arranging multiple bus ribbons within the mounting plate of the solar module area, multiple solar battery string sets can be connected in series / parallel to meet the output voltage and current requirements of the solar module and improve output power, and by welding a bypass diode between every two bus ribbons, each solar battery string set can be protected. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram of a conventional see-through silicon crystalline solar energy module. [Figure 2]FIG. 2 is a schematic diagram of the perfect square silicon chip of the present invention cut into solar energy cells. [Figure 3] FIG. 3 is a schematic diagram of a solar battery string set formed by welding solar battery cells in series according to the present invention. [Figure 4] FIG. 4 is a schematic diagram of the welding form between the solar cell string set and the bus ribbon according to the present invention. [Figure 5] FIG. 5 is a schematic diagram showing the application of the present invention to a see-through silicon crystal solar energy module. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following describes the embodiments of the present invention through specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed herein.

[0017] It should be understood that the structures, proportions, dimensions, etc. shown in the drawings attached to this specification are merely for the purpose of conforming to the contents of the disclosure in the specification so that those skilled in the art can understand and read them, and are not intended to limit the feasible conditions of the present invention, and therefore have no substantial technical meaning, and any structural modification, change in proportionality, or adjustment of size is within the scope of the technical content disclosed in this specification as long as it does not affect the effects and objectives achieved by the present invention. In addition, terms cited in this specification, such as "upper," "lower," "front," "rear," "left," "right," and "one," are merely used for the purpose of clarity, and are not intended to limit the feasible scope of the present invention, and any change or adjustment of their relative relationships should be considered within the feasible scope of the present invention as long as it does not substantially change the technical content.

[0018] 2 is a schematic diagram of a perfect square silicon chip according to the present invention cut into a plurality of solar energy cells. As shown in FIG. 2, a perfect square (or rectangular) silicon crystal cell 211 is laser cut into a plurality of narrow solar energy cells 210, with the vertical spacing lines representing the solar energy cell main grid lines 213 and the horizontal dashed lines representing the laser cutting trajectories 215 after the laser cutting process. The width of each solar energy cell 210 in the first direction is the first length W, and the length of each solar energy cell in the second direction is the second length L. For example, the first length is greater than 7 mm. In other embodiments, the first length W can be greater than 8 mm, 9 mm, or 11 mm. The first length W is adjusted according to the output power and overall area of ​​the entire solar energy cell, and the ratio of the first length W to the second length L is greater than 10, i.e., L / W>10. In such a dimension design, more solar energy battery cells 210 can be laser cut, which can effectively increase the output power of the entire solar energy battery.

[0019] FIG. 3 is a schematic diagram of a solar energy battery string set formed by serial welding of solar energy battery cells according to the present invention. A plurality of solar energy battery cells 210 are serially welded to define a solar energy battery string set 220. The solar energy battery cells 210 are serially connected in a first direction at a predetermined spacing distance S to form the solar energy battery string set 220. For example, the predetermined spacing distance S is less than 3 mm. In other embodiments, the predetermined spacing distance S may be less than 2.8 mm, 2.6 mm, or 2.4 mm, and the width of the predetermined spacing distance S may be adjusted according to the output power and / or heat dissipation of the entire solar energy battery. The horizontal spacing lines are solar energy battery cell main grid lines 213. The total number of solar energy battery cells 210 included in each solar energy battery string set 220 does not exceed 100, which effectively prevents the output voltage of each solar energy battery string set 220 from becoming too high. In other embodiments, the total number of solar energy battery cells 210 may be 90 or 80 or less, and the output voltage of the solar energy battery string set 220 may be reduced and the total number of solar energy battery cells 210 may be relatively adjusted according to the light irradiation intensity or the length of daytime irradiation in each region, thereby effectively maintaining the electrical safety of the solar energy module of the present invention, and the total number of solar energy battery cells 210 in the solar energy battery string set 220 may be changed according to the load of power consumption.

[0020] FIG. 4 is a schematic diagram of a welding method for solar battery string sets and bus ribbons according to the present invention. A solar energy module 200 according to the present invention includes solar battery cells 210, solar battery string sets 220, a mounting plate 230, and a bus ribbon 240. The mounting plate 230 (represented by a dashed rectangular line in FIG. 4 ) includes a transparent front cover plate and a transparent rear cover plate. The front cover plate and the transparent rear cover plate are made of transparent materials, such as glass or resin. An interlayer bond is formed between the front cover plate and the multiple solar battery string sets 220 to protect the solar battery cells 210 and the solar battery string sets 220 and prevent damage. The solar energy module 200 uses multiple bus ribbons 240 to compress the multiple solar battery string sets 220 between the front cover plate and the rear cover plate in a series / parallel connection. In other words, the solar battery cell string sets 220 can be connected in series or in parallel with each other to form the circuit structure of the solar energy module 200 .

[0021] In this embodiment, in the circuit structure of the solar energy module 200, the solar energy cell string sets 220 on both sides of each bus ribbon 240 are connected in series, and the solar energy cell string sets 220 between each two bus ribbons 240 are connected in parallel. For example, if each solar energy cell string set 220 is considered as a single battery structure, the left and right sides of a single bus ribbon 240 have a series-connected battery structure in which the positive and negative electrodes are connected, and the battery structure between two bus ribbons 240 has a parallel-connected battery structure in which the positive and negative electrodes are connected. In this way, the electrical connection between the bus ribbons 240 and the solar energy cell string sets 220 can adjust the output voltage of the entire solar energy module 200 and improve electrical safety. In this embodiment, the bus ribbons 240 are welded to all the solar energy cell string sets 220, and then heat-laminated together with the front cover glass, the rear cover glass, and the bonding interlayer film to form a see-through solar energy module laminate as shown in FIG. 4.

[0022] 4 and 5, FIG. 5 is a schematic diagram illustrating the application of the present invention to a see-through silicon crystalline solar energy module. The solar energy module 200 further includes at least one bypass diode 250, an electrical cable 260, a terminal 270, and a junction box 280. The electrical cable 260 is electrically connected to one end of the at least one bypass diode 250. The terminal 270 is electrically connected to the other end of the at least one bypass diode 250. The bypass diode 250 is disposed inside the junction box 280 to protect its electrical safety. Each bypass diode 250 is electrically connected between two bus ribbons 240. In this embodiment, the same end of each of the four vertical bus ribbons 240 is connected to a bypass diode 250, and the multiple bypass diodes 250 can be referred to as a first bypass diode, a second bypass diode, and a third bypass diode from right to left. The positive electrode of the first bypass diode (i.e., one end of at least one bypass diode 250) is electrically connected to the electrical cable 260, the negative electrode of the first bypass diode is electrically connected to the positive electrode of the second bypass diode, the negative electrode of the second bypass diode is electrically connected to the positive electrode of the third bypass diode, and the negative electrode of the third bypass diode (i.e., the other end of at least one bypass diode 250) is electrically connected to the terminal 270.

[0023] In the proposal of the present invention, multiple bus ribbons are arranged within the mounting plate of the solar energy module area, thereby providing protection against solar energy. A series-connected battery structure is formed on the left and right sides of the bus ribbon, with the positive and negative electrodes connected, and a parallel-connected battery structure is formed between two bus ribbons, with positive-to-positive and negative-to-negative connections, which meets the output voltage and current requirements of the solar energy module and improves the output power. In addition, by welding a bypass diode between each two bus ribbons, each solar energy battery string set can be protected and the overheating phenomenon of the solar energy module can be avoided.

[0024] The above-described embodiments are merely illustrative of the principles and advantages of the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make various modifications and variations to the above-described embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention is as defined in the following claims. [Explanation of symbols]

[0025] 100, 200 solar energy modules 110 rectangular battery cells 120 Battery String 130, 240 bus ribbon 140, 280 junction box 150, 260 Electrical Cable 210 solar energy battery cells 211 Silicon Crystal Battery Cell 213 Solar Energy Battery Cell Main Grid Line 215 Laser cutting trajectory 220 Solar Energy Battery String Set 230 Mounting Plate 250 Bypass Diode 270 terminals W First length L Second length S specified spacing distance

Claims

1. a plurality of solar energy battery cells, each of which is defined by series connection welding into a plurality of solar energy battery string sets, connected in series at a predetermined interval in a first direction to form each solar energy battery string set, wherein the width in the first direction is a first length and the length in the second direction is a second length, and the ratio of the second length to the first length is greater than 10; a mounting plate including a front cover plate and a rear cover plate, wherein the plurality of solar cell string sets are pressed between the front cover plate and the rear cover plate by a plurality of bus ribbons in a series / parallel connection, so that the solar cell string sets on both sides of each bus ribbon are connected in series, and the solar cell string sets between two bus ribbons are connected in parallel; A solar energy module comprising:

2. 2. The solar energy module according to claim 1, wherein a bonding interlayer is formed between the front cover plate, the rear cover plate and the plurality of solar energy cell string sets.

3. 2. The solar energy module according to claim 1, wherein the front cover plate and the rear cover plate are made of a transparent material.

4. 4. The solar energy module according to claim 3, wherein the transparent material is glass or resin.

5. 2. The solar energy module of claim 1, wherein the first length is greater than 7 mm.

6. 2. The solar energy module according to claim 1, wherein the total number of the solar energy battery cells in each of the solar energy battery string sets does not exceed 100.

7. 2. The solar energy module according to claim 1, wherein the predetermined spacing distance is less than 3 mm.

8. 10. The solar energy module of claim 1, further comprising at least one bypass diode electrically connected between two bus ribbons.

9. 9. The solar energy module of claim 8, further comprising an electrical cable electrically connected to one end of the at least one bypass diode.

10. 10. The solar energy module of claim 9, further comprising a terminal electrically connected to the other end of the at least one bypass diode.

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