Solar module
By adopting the new solar cell layout design and busbar layout method in the solar module, the shortcomings in perspective and output power of the traditional module are solved, and the battery string group is protected by bypass diodes, achieving a more efficient solar power generation effect.
Patent Information
- Application Number
- CN202421582326.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-05-21
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-05
AI Technical Summary
When used in translucent glass building curtains or balcony lighting fences, traditional perspective-type silicon crystal solar modules are difficult to take into account both perspective and output power, and are prone to high series voltage.
Using a brand new solar cell layout design, the solar cell is formed by cutting the solar cell into a ratio of the second length to the first length by more than 10, and in series at a preset spacing distance in the first direction, combining multiple bushing welding tapes to press the battery string between the carrier plates made of transparent material in a series/parallel manner, adding an adhesive intermediate film to protect the battery cell, and welding bypass diodes between the bushing welding tapes to protect the battery string.
It improves the perspective and output power of the solar module, avoids the problem of excessive series voltage, and provides protection for the solar cell string group to prevent overheating.
Smart Images
Figure CN222814775U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of solar energy technology, and in particular to a solar module. Background Art
[0002] In response to the global trend towards near-zero energy buildings, the technology of integrating solar energy into building structures is becoming more and more common. However, building-integrated solar modules used in translucent glass building curtains or balcony lighting fences must be visually transparent.
[0003] like Figure 1 As shown, the solar module 100 of the conventional see-through type silicon solar module comprises rectangular solar cells 110, a cell string 120, a busbar 130, a junction box 140 and a cable 150. The solar module 100 is mainly formed by cutting the silicon solar cell into rectangular solar cells 110, and then connecting the rectangular solar cells 110 in series to form a cell string 120. The cell strings 120 are then welded together in series to form the internal circuit of the solar module 100. However, due to the influence of the width of the solar module, the total number of series-connected rectangular solar cells 110 is often too large, resulting in an excessively high series voltage. Alternatively, in order to avoid an excessively high series voltage, the total number of series-connected narrow rectangular solar cells 110 must be reduced. Therefore, the conventional rectangular solar cell module is quite difficult to use as a see-through solar module 100 in practical applications.
[0004] Therefore, how to overcome the various deficiencies of the above-mentioned prior art has become a difficult problem that needs to be overcome urgently in the current industry. Utility Model Content
[0005] In view of the above-mentioned deficiencies in the prior art, the present application is to solve the technical problems encountered by the above-mentioned traditional transparent solar modules, and to improve the transparency and output power of the solar module by a new solar cell layout design method.
[0006] The present application provides a solar module, comprising: a plurality of solar cells, wherein each of the solar cells is defined as a plurality of solar cell strings by a series welding method, the plurality of solar cells are connected in series at a preset spacing distance in a first direction to form each of the solar cell strings, the width of each of the solar cells in the first direction is a first length, the length of each of the solar cells in the second direction is a second length, and the ratio of the second length to the first length is greater than 10; a carrier plate, comprising a front cover plate and a rear cover plate, the solar module presses the plurality of solar cell strings in a series / parallel manner between the front cover plate and the rear cover plate through a plurality of busbars, wherein each of the solar cell strings on both sides of each of the busbars forms a series connection, and each of the solar cell strings forms a parallel connection between the two busbars.
[0007] In the aforementioned solar module, a bonding intermediate film is provided between the front cover plate, the rear cover plate and the plurality of solar cell strings.
[0008] In the aforementioned solar module, the front cover plate and the rear cover plate are made of transparent materials.
[0009] In the aforementioned solar module, the transparent material is glass or resin.
[0010] In the aforementioned solar module, the first length is greater than 7 mm.
[0011] In the aforementioned solar module, the total number of the plurality of solar cells in each solar cell string group does not exceed 100.
[0012] In the aforementioned solar module, the preset spacing distance is less than 3 mm.
[0013] The aforementioned solar module further includes: at least one bypass diode, each of which is electrically connected between two busbars.
[0014] The aforementioned solar module further includes: a 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.
[0015] As can be seen from the above, the solar module of the present application is mainly formed by cutting solar cells into a second length with a ratio of the second length to the first length greater than 10, and connecting them in series at a preset spacing distance in a first direction to form a solar cell string group, so as not to affect the visual perception when used in a glass building curtain. In addition, multiple busbars are arranged in a supporting plate in the area of the solar module to combine multiple solar cell strings in a series / parallel manner, thereby meeting the output voltage and current requirements of the solar module to increase the output power. At the same time, a bypass diode is welded between each two busbars to protect each solar cell string group. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of an existing see-through silicon solar module.
[0017] Figure 2 This is a schematic diagram of cutting a complete square silicon wafer into solar cells according to the present application.
[0018] Figure 3 This is a schematic diagram of the solar cell panels of the present application being welded in series to form a solar cell string group.
[0019] Figure 4 It is a schematic diagram of the welding method of the solar cell string group and the busbar of the present application.
[0020] Figure 5This is a schematic diagram of the present application applied to a see-through silicon solar cell module.
[0021] Main component symbols
[0022] 100,200 solar modules
[0023] 110 Rectangular Cell
[0024] 120 battery string
[0025] 130,240 busbar
[0026] 140,280 Junction Box
[0027] 150,260 Cable
[0028] 210 Solar Cells
[0029] 211 Silicon Cell
[0030] 213 Solar cell busbar
[0031] 215 Laser cutting tracks
[0032] 220 Solar cell strings
[0033] 230 Loading plate
[0034] 250 Bypass diode
[0035] 270 terminal
[0036] W First Length
[0037] L Second length
[0038] S Preset separation distance. DETAILED DESCRIPTION
[0039] The following describes the implementation methods of the present application through specific embodiments. A person skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.
[0040] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for the understanding and reading of ordinary technicians in the field, and are not used to limit the limiting conditions for the implementation of this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application. At the same time, the terms such as "upper", "lower", "front", "back", "left", "right" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this application. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this application without substantially changing the technical content.
[0041] Figure 2 This is a schematic diagram of cutting a complete square silicon wafer into multiple solar cells in this application. Figure 2 As shown, a complete square (or rectangular) silicon crystal cell 211 is cut into multiple narrow and wide solar cells 210 by laser, the vertical spacing lines are the solar cell main grid lines 213, the horizontal dotted lines are the laser cutting tracks 215 after the laser cutting process, the width of each solar cell 210 in the first direction is the first length W, and the length of the solar 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 also be greater than 8 mm, 9 mm or 11 mm, the width of the first length W is adjusted according to the overall solar cell output power and the overall area, the ratio of the second length L to the first length W is greater than 10, in other words, L / W>10, such a size design can laser cut more solar cells 210, which can effectively increase the overall solar cell output power.
[0042] Figure 3The schematic diagram of the solar cell panels of the present application being welded in series to form a solar cell string group. A plurality of solar cell panels 210 are welded in series to define a solar cell string group 220. A plurality of solar cell panels 210 are connected in series in a first direction at a preset spacing distance S to form a solar cell string group 220. For example, the preset spacing distance S is less than 3 mm. In other embodiments, the preset spacing distance S may also be less than 2.8 mm, 2.6 mm, or 2.4 mm, and the width of the preset spacing distance S is adjusted according to the overall solar cell output power and / or heat dissipation. The horizontal spacing lines are the main grid lines 213 of the solar cell panels. The total number of the plurality of solar cell panels 210 included in each solar cell string group 220 does not exceed 100, which effectively prevents the output voltage of each solar cell string group 220 from being too high. In other embodiments, the total number of solar cells 210 can also be 90 or less than 80, which is used to reduce the output voltage of the solar cell string group 220, so as to relatively adjust the total number of solar cells 210 according to the light intensity or the length of daytime exposure in each region, effectively maintain the power safety of the solar module of the present application, and change the total number of solar cells 210 in the solar cell string group 220 according to the load power consumption.
[0043] Figure 4 Schematic diagram of the method of welding the solar cell string group and the busbar. The solar module 200 of the present application includes a solar cell sheet 210, a solar cell string group 220, a carrier plate 230 and a busbar 240. The carrier plate 230 ( Figure 4 The solar module 200 (indicated by a dotted rectangular line) includes a transparent front cover and a rear cover. The front cover and the rear cover are made of a transparent material, such as glass or resin. A bonding intermediate film is included between the front cover and the rear cover and the plurality of solar cell strings 220 to protect the solar cell sheets 210 and the solar cell strings 220 from loss. The solar module 200 presses the plurality of solar cell strings 220 in series / parallel between the front cover and the rear cover through a plurality of busbars 240. In other words, the solar cell strings 220 can be connected in series or in parallel to form a circuit structure of the solar module 200.
[0044] In the present embodiment, taking the circuit structure of the solar module 200 as an example, each solar cell string group 220 on both sides of each busbar ribbon 240 forms a series connection, and each solar cell string group 220 between each two busbar ribbons 240 forms a parallel connection. For example, each solar cell string group 220 can be regarded as a battery structure, and the left and right sides of a single busbar ribbon 240 are a series battery structure in which the positive and negative poles are connected, and between two busbar ribbons 240 is a parallel battery structure in which the positive pole is connected to the positive pole and the negative pole is connected to the negative pole. In this way, the electrical connection method between the busbar ribbon 240 and the solar cell string group 220 can adjust the output voltage of the entire solar module 200 and increase electrical safety. In the present embodiment, after the busbar ribbon 240 is welded to all the solar cell string groups 220, they are heated and laminated together with the front cover glass, the rear cover glass and the adhesive intermediate film to form a battery structure as shown in FIG. Figure 4 Transparent solar module laminate.
[0045] Please also see Figure 4 and Figure 5 , Figure 5 This is a schematic diagram of the present application applied to a transparent silicon crystalline solar module, where the solar module 200 further includes at least one bypass diode 250, a cable 260, a terminal 270, and a junction box 280. The 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 busbars 240. In the present embodiment, among the four vertical busbars 240, the same end of each busbar 240 is connected to the bypass diode 250. 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 pole of the first bypass diode (i.e., one end of at least one bypass diode 250) is electrically connected to the cable 260, the negative pole of the first bypass diode is electrically connected to the positive pole of the second bypass diode, the negative pole of the second bypass diode is electrically connected to the positive pole of the third bypass diode, and the negative pole of the third bypass diode (i.e., the other end of at least one bypass diode 250) is electrically connected to the terminal 270.
[0046] The present application proposes to arrange a plurality of busbars in a carrier plate in the area of a solar module to provide protection for the solar cell panels. On the left and right sides of the busbars are a series battery structure in which the positive and negative poles are connected. Between the two busbars is a parallel battery structure in which the positive pole is connected to the positive pole and the negative pole is connected to the negative pole. This meets the output voltage and current requirements of the solar module to increase the output power. At the same time, a bypass diode is welded between each two busbars to protect each solar cell string group and prevent overheating of the solar module.
[0047] The above embodiments are only used to illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art may modify the above embodiments without violating the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be as set forth in the claims.
Claims
1. A solar module, characterized in that: include: A plurality of solar cells, wherein each of the solar cells is welded in series to define a plurality of solar cell strings, the plurality of solar cells are connected in series at a preset interval in a first direction to form each of the solar cell strings, the width of each of the solar cells in the first direction is a first length, the length of each of the solar cells in the second direction is a second length, and the ratio of the second length to the first length is greater than 10; and The supporting plate includes a front cover plate and a rear cover plate. The solar module presses the multiple solar cell strings in a series / parallel manner between the front cover plate and the rear cover plate through multiple busbars, wherein the solar cell strings on both sides of each busbar form a series connection, and the solar cell strings between the two busbars form a parallel connection.
2. The solar module according to claim 1, characterized in that: An adhesive intermediate film is provided between the front cover plate, the rear cover plate and the plurality of solar cell string groups.
3. The solar module according to claim 1, characterized in that: The front cover plate and the rear cover plate are made of transparent materials.
4. The solar module according to claim 3, characterized in that: The transparent material is glass or resin.
5. The solar module according to claim 1, characterized in that: The first length is greater than 7 mm.
6. The solar module according to claim 1, characterized in that: The total number of the plurality of solar cells in each solar cell string group does not exceed 100.
7. The solar module according to claim 1, characterized in that: The preset spacing distance is less than 3 mm.
8. The solar module according to claim 1, characterized in that: The solar module also includes at least one bypass diode electrically connected between the two busbars.
9. The solar module according to claim 8, characterized in that: The solar module also includes a cable electrically connected to one end of the at least one bypass diode.
10. The solar module according to claim 9, characterized in that: The solar module also includes a terminal electrically connected to the other end of the at least one bypass diode.