Photovoltaic subassembly, PN (positive-negative) junction element and manufacturing method of PN junction element
A photovoltaic module, PN junction technology, applied in the photovoltaic field, can solve the problems of waste, inability to export cell power, reduce the working efficiency of photovoltaic modules, etc., to achieve high working efficiency and avoid the effect of hot spot effect.
Inactive Publication Date: 2013-03-13
TIANJIN YINGLI NEW ENERGY RESOURCES
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Problems solved by technology
When a cell in the photovoltaic module is blocked, in order to avoid burning the module, the diode will short-circuit the two strings of cells where the cell is located. Export the electric energy generated by the rest of the cells, causing waste and reducing the working efficiency of photovoltaic modules
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[0037] The core of the present invention is to provide a photovoltaic module, which can avoid hot spot effect and has high working efficiency. In addition, another core of the present invention is to provide a PN junction element and a manufacturing method thereof.
[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0039] Please refer to figure 1 , figure 1 It is a schematic structural diagram of the battery string of the photovoltaic module provided by the present invention.
[0040] In a specific embodiment, the present invention provides a photovoltaic module, including battery slices 1, welding ribbons 3, busbars 4, glass plates and back plates, and several battery slices 1 are connected in series by welding ribbons 3 to form a battery string , several battery strings are c...
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The invention discloses a photovoltaic subassembly comprising battery slices, solder strips, bus strips, a glass plate and a back plate, wherein a plurality of battery slices are connected in series to form battery strings by the solder strips; the plurality of battery strings are connected in series by the bus strips and are arranged between the glass plate and the back plate, so that the photovoltaic subassembly is formed; the photovoltaic subassembly also comprises a plurality of PN (positive-negative) junction elements, and each battery slice is connected with one PN junction element in parallel. The resistance of each battery slice is increased, and the current can not pass, so that voltage drop exists at two surface of each battery slice when the battery slices are shielded in the working process of the photovoltaic subassembly; and the PN junction elements connected with the battery slices in parallel are opened, when the battery slices are in a short circuit state, so that the shielded battery slices are prevented from generating a hot spot effect. According to the structure, only the shielded battery slices are in the short circuit state, and the other battery slices can be used for exporting electric energy. Compared with the prior art, the photovoltaic subassembly has high work efficiency when battery slices are shielded. The invention also discloses the PN junction elements and the manufacturing method of the PN junction element.
Description
technical field [0001] The invention relates to the technical field of photovoltaics, in particular to a photovoltaic module. In addition, the present invention also relates to a PN junction element and a manufacturing method thereof. Background technique [0002] Photovoltaic modules can convert light energy into electrical energy, and the cells packaged in photovoltaic modules are the photoelectric conversion units of photovoltaic modules. [0003] During the production process of photovoltaic modules, the battery slices are first connected in series with welding ribbons to form battery strings, and then the battery strings are arranged in sequence and connected in series with busbars, and the battery strings are placed between the back plate and the glass plate for lamination, before and after lamination. Electroluminescence test to detect whether there are quality problems such as cracks and missing corners in the cells; install the upper frame around the laminated phot...
Claims
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IPC IPC(8): H01L31/042H01L31/05H01L31/02H01L31/18H01L25/16H01L31/044
CPCY02E10/50Y02P70/50
Inventor 姜磊荣丹丹吕景记魏文秀于波
Owner TIANJIN YINGLI NEW ENERGY RESOURCES