TH13237U - A solar charger with peak power tracking using open-circuit voltage ratio method. - Google Patents

Abstract

Updated 18/04/2017 (28/03/2017) A solar power charger with peak power tracking using open-circuit voltage ratio consists of two main components: the charger housing and the electrical circuit. The electrical circuit is constructed using analog components. When used with a solar power charger that tracks peak power and uses open-circuit voltage ratio, it can extract the maximum power that the solar panels can produce under the given light intensity conditions. This power is then transferred to the batteries and supplied to the load, exceeding the efficiency of typical commercially available chargers. This maximizes the efficiency of the solar power system, utilizing the power from the solar panels to their fullest potential. Maximizing the efficiency of a solar power system by utilizing the electrical power from solar panels to their fullest potential.

Claims (1)

Revised 18/04/2017 (28/03/2017) 1. Solar photovoltaic charger with open-circuit voltage-proportional tracking consists of the following electrical circuits of the solar photovoltaic charger with open-circuit voltage-proportional tracking: a timer circuit (11) which sets the operating time, and the signal from the timer circuit is fed to the open-circuit switch (12). When the circuit is opened, the load is temporarily disconnected to measure the open-circuit voltage through the voltage divider circuit (13) and the open-circuit voltage detector (14). A signal sampling and holding circuit (15) is used to sample the open-circuit voltage and hold it for a specified time. The open-circuit voltage is measured by the open-circuit voltage detector (14) and the battery voltage is measured by the open-circuit detector. The battery voltage (16) is fed to the signal multiplier circuit (17) to obtain the reference voltage (18), and the reference voltage (18) is compared with the sawtooth signal (19) using a signal comparator circuit (20) to obtain a pulse signal (21). This pulse is then passed through a signal isolation circuit (22) to isolate the signal ground and then drives the switch of the buck converter circuit (23). Inside the buck converter circuit (24) are the buck converter switch (23), a diode (25), an inductor (26), and a capacitor (27). The operation of the circuit relies on the power supply (28) to receive power from the battery, isolate the ground between the battery and the charging circuit, and provide power to the charging circuit. The input current of the charging circuit in this invention is the current from the solar panel flowing through the solar panel terminals (5), through the buck converter switch (23), the inductor (26), and the capacitor (27) to obtain the output current. The output current of the charger in this invention is either charged to the battery through the battery terminal connections (6) or supplied to the load through the load terminal connections (7). --------------------------------------------- 1. Open-circuit proportional peak point tracking solar charger consists of the following electrical circuits of the open-circuit proportional peak point tracking solar charger: a timer circuit (11) which sets the operating time, and the signal from the timer circuit is fed to the open-circuit switch (12). When the circuit is opened, the load is temporarily disconnected to measure the open-circuit voltage through a voltage divider circuit (13) and an open-circuit voltage detector (14). A sampling and holding circuit (15) is used to sample the open-circuit voltage and hold it for a set time. The open-circuit voltage measured by the open-circuit voltage detector (14) and the battery voltage measured by the open-circuit detector are then recorded. The battery voltage (16) is fed to the signal multiplier circuit (17), the reference voltage (18) is calculated, and the reference voltage (18) is compared with the sawtooth signal (19) using a signal comparator circuit (20) to obtain a pulse signal (21). This pulse signal is then passed through a signal isolation circuit (22) to isolate the signal ground and then used to drive the switch of the buck converter circuit (23). Inside the buck converter circuit (24) are the buck converter switch (23), a diode (25), an inductor (26), and a capacitor (27). The operation of the circuit in Figure 2 relies on the power source (28) to receive power from the battery, isolate the ground between the battery and the charging circuit, and supply power to the charging circuit. The input current of the charging circuit in this invention is the current from the solar panel flowing through the solar panel terminals (5), through the buck converter switch (23), the inductor (26), and the capacitor (27) to obtain the output current. The output current of the charger according to this invention is either charged into the battery through the battery terminal connector (6) or supplied to the load through the load terminal connector (7).