Using electrochemical cells, the battery stores electrical energy in the form of chemical energy. Then, at the time of use, the batteries transform the stored energy back into electrical energy.
As you can see, these are two dependent elements that need phone number list each other to carry out the whole process: storing energy and converting it into electricity. Next, we are going to focus on solar batteries, since they are the most common system.
How do solar batteries work?
Batteries, which operate on the principle of oxidation-reduction , are made up of chemical cells that have a negative pole and a positive pole. Inside they also contain electrolytes that allow the electric flow to go outwards.
In these chemical cells, two processes take place: first, the conversion of electricity into chemical energy, and then the conversion of chemical energy back into electricity so that it can be used when needed.
Characteristics of an energy accumulator
Material: Batteries used in photovoltaic systems are usually made of lithium ion systems.
Capacity: is the amount of energy that can be supplied under certain working conditions . It is expressed in ampere-hours (Ah).
This capacity represents the amount of energy that the battery is capable of supplying, taking as a reference value an intensity of 1 A supplied for one hour.
The capacity varies with temperature: it increases at higher temperatures and decreases at very low temperatures.
Voltage level: The voltage of batteries is usually between 2 V and 12 V, although any voltage value can be achieved by means of appropriate series-parallel connections.
It is important to mention that in order to achieve an adequate service life, batteries should not be completely discharged. The percentage amount that is discharged is known as the depth of discharge . The shallower the discharge processes, the longer the service life of the battery. Regulators are used to control this level of discharge.
