When solar energy is stored in the battery, it’s necessary to protect the battery from being damaged for the reason of overcharging, over discharging. There are many works on it. More or less maximum designing purposes & processes are same. We have gone through several journal papers. From which a brief review is given here.
A work has been done to develop a charge controller which based on Cuk DC/DC converter in order to transfer solar energy (photovoltaic) to battery.
Here the Cuk convert is configured in parallel power transfer mode (PPT) which can be able to achieve higher efficiency. The paraller power transfer can flow the power into the load by two ways. These are (1) power flowing directly to the load without the converter (Pp) and (2) power flowing to the load through the converter (Pm). Thus this controller get more efficient. This is shown in figure 1.2 .
Figure 1.2: Power flow of converter in (a) conventional and (b) PPT Configuration.
This paper deals with a charge controller for thin-film (CdTe) PV modules. The output voltage is boosted that refers output voltage is much higher than the popular values of the order of nominal 12V or 24V. In PV technique notion of the ‘higher voltages’ definition are not exceeding 1KV . A charge controller which is incorporating an SGS- Thompson microcontroller, ST62E20 can be able to prolong the battery life .
In recent year research and development of low cost flat-panel solar panels, thin-film devices, concentrator system have increased. There are many MPPT algorithm which can be used for implementation viz.
Incremental conductance method, constant voltage, Fuzzy logic based method etc. Different MPPT algorithms ,, are given in brief about their feature and limitations as below: