Views: 0 Author: Site Editor Publish Time: 2022-06-30 Origin: Site
We know that photovoltaic modules play a huge role in our daily life. In fact, photovoltaic modules need to be produced, and the cells are important materials for the production of photovoltaic modules. So what are the cells used in the production of photovoltaic modules? Let's take a look together next.
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Crystalline silicon solar cell
The electrical properties of the cells used in photovoltaic modules
At present, the crystalline silicon solar cells used in the production of crystalline silicon solar photovoltaic modules mainly include 125mmX125mm monocrystalline solar cells, 156mm×156mm monocrystalline solar cells, and 156mm×156mm polycrystalline silicon solar cells, with a thickness of 200μm.
An ideal crystalline silicon solar module can be represented by a model of a single diode equivalent circuit. Including solar module base area resistance, diffusion area sheet resistance, electrode contact resistance, main grid line resistance, fine grid line resistance, back contact resistance: Rush is the equivalent parallel resistance of the solar module, which is the part generated inside the solar module The photo-generated current is lost by leakage through the edge of the battery, which is equivalent to connecting a resistor in parallel between the two poles of the battery. RL is the load resistance, and Iph is the current generated by the drifting movement of photo-generated carriers under the action of the p-n junction electric field, called photo-generated current; Id is the current flowing through the solar cell diode. Ish is the current flowing through the parallel resistor.
Generally, crystalline silicon solar photovoltaic modules are composed of single solar cells in series. Under ideal conditions, the output voltage of the module is the sum of the voltages of each battery, and the output current of the module is determined by the smallest output current.
In order to ensure that the electrical performance of each solar photovoltaic module is consistent, the performance of the solar cells must be sorted during the manufacture of photovoltaic modules, and solar cells with large electrical properties are not allowed to be connected in series in the same module. For the beautiful appearance of photovoltaic modules, the color difference of the cells is usually sorted during the manufacture of photovoltaic modules.
In addition, in order to avoid hot spots when solar photovoltaic modules are used outdoors, it is usually required that the crystalline silicon solar cells used in the production of modules have a smaller reverse current. The reverse current of the crystalline silicon solar photovoltaic module cell refers to the current that flows through the photovoltaic module cell when a certain reverse voltage is applied to the solar cell.
In the production of crystalline silicon solar photovoltaic modules, if the reverse current of the selected crystalline silicon solar photovoltaic modules is too large, the bypass diode will not play a protective role when partial shading occurs, and the solar photovoltaic modules are easily damaged.
Anhui JF Solar Technology Co., Ltd. (JF Solar) manufacturers use crystalline silicon solar cells in the production of photovoltaic modules and conduct a large number of tests before they leave the factory to ensure the quality of photovoltaic modules. If you are interested, you can contact us, our website is https://www.jf-solartech.com/.