Solar battery piece unit, photovoltaic battery module and preparation process therefor
A technology of solar cells and photovoltaic cells, which is applied in the field of solar cells to achieve the effects of reducing the internal resistance of the cells, convenient operation, and stable structure
Inactive Publication Date: 2018-02-16
武宇涛
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- Claims
- Application Information
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Problems solved by technology
Those serial process improvements based on the existing conventional flat ribbon process are difficult to effectively solve the problems faced by the existing serial process
Method used
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Embodiment Construction
[0059] The above and other technical features and advantages of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.
[0060] see Figure 1 to Figure 4 The solar cell unit provided by Embodiment 1 of the present invention includes a silicon substrate and a front electrode structure and a back electrode structure disposed on the silicon substrate.
[0061] Such as figure 1 As shown, the front electrode structure includes a thin grid line 11, a front bus electrode 12 for collecting photo-generated current, and a front interconnection electrode 13 for connecting cells in series. The front bus electrode 12 is provided with a strengthened metal layer with specular reflective effect, and the front interconnect electrode 13 is arranged at the front edge of the cell unit to connect the front bus electrode 12 a...
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The invention discloses a solar battery piece unit, a photovoltaic battery module and a preparation process therefor. Each battery piece unit comprises a silicon substrate, a front surface electrode structure and a back surface electrode structure arranged on the silicon substrate; the front surface electrode structure comprises a front surface bus electrode used for collecting a photo-generated current and a front surface interconnection electrode used for realizing serial connection of the battery piece units; the front surface bus electrode is provided with an intensified metal layer with amirror surface light trapping effect; the back surface electrode structure comprises a back surface interconnection electrode array embedded in a back surface electric field and an interconnection conductive network for covering the back surface interconnection electrode array; the interconnection conductive network is woven by conductive metal wires; and the back surface interconnection electrode array is connected with the interconnection conductive network and can be connected with the front surface interconnection electrode of the adjacent solar battery piece units through the interconnection conductive network to realize conduction. By virtue of the battery piece unit, the conductivity of the bus electrode is improved, the battery internal resistance is lowered and near-distance serial connection and stable structure are realized.
Description
technical field [0001] The invention relates to the technical field of solar cells, in particular to a solar cell unit, a photovoltaic cell module and a preparation process thereof. Background technique [0002] The front and back of conventional solar cells are respectively provided with several groups of interconnected electrodes corresponding to the positions. On the one hand, the interconnected electrodes are used to collect the photo-generated current generated on the surface of photovoltaic cells, and on the other hand, they provide the welding positions required for the battery cells to be connected in series. , used to connect silicon substrates and interconnect metal materials. [0003] Photovoltaic modules are usually formed by connecting battery cells in series with interconnecting materials. The conventional interconnection material is a tinned copper flat strip. Generally, the thickness of the copper substrate is between 0.1mm and 0.3mm, and the width is 10-20 ...
Claims
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IPC IPC(8): H01L31/0224H01L31/05H01L31/18
CPCH01L31/022425H01L31/022433H01L31/0504H01L31/188Y02E10/50Y02P70/50
Inventor 武宇涛
Owner 武宇涛