HSI series 1200w hybrid solar inverter
Discharge of lead battery
When the battery is connected to the load, under the action of the electromotive force, the current flows from the positive electrode to the negative electrode through the load (that is, the electrons flow from the negative electrode to the positive electrode), so that the positive electrode potential decreases and the negative electrode potential increases, which destroys the original balance.
At the positive plate, Pb4+ combines with electrons to become divalent lead ions Pb2+, and Pb2+ combines with SO42- in the electrolyte to form PbS04 which is deposited on the electrode plate.
which is
Pb4++2e----> Pb2+
Pb2++ SO42-=PbSO4
At the negative plate, the combination of Pb2+ and SO42- in the electrolyte also generates PbS04 which is deposited on the negative plate, while the metal lead on the plate continues to dissolve to generate Pb2+ and electrons. If the circuit is not interrupted, the above chemical reaction will continue, so that PbO2 on the positive plate and Pb on the negative plate are gradually converted into PbS04, PbS04 in the electrolyte gradually decreases and water increases, so the relative density of the electrolyte decreases.
Different intensities of light are irradiated on the photovoltaic cells, and the photovoltaic cells have different short-circuit currents Isc and open-circuit currents Voc, as shown in Figure 1. It can be seen from Figure 1 that the short-circuit current Isc-light intensity Ev characteristic is a straight line, that is, the short-circuit current has a linear relationship with the light intensity in a wide range of light intensity, while the open-circuit voltage is nonlinear, and when the light intensity is small. , when about 20mW/cm2, the short-circuit voltage tends to be saturated. Therefore, in order to measure or control the intensity of light with a photovoltaic cell, the short-circuit current characteristics of the photovoltaic cell should be used.
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