Storage battery charging control circuit in photovoltaic power generation system
A photovoltaic power generation system and charging control technology, applied in photovoltaic power generation, battery circuit devices, photovoltaic modules, etc., can solve the problems of inability to charge batteries, complex circuits, and high costs, reducing production and operation costs, simple circuit structure, and perfect charging. effect of function
Inactive Publication Date: 2015-03-25
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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Problems solved by technology
In the current low-cost photovoltaic array charging circuit, the photovoltaic array directly charges the battery. Since the output voltage of the photovoltaic array changes with the outside world, when the output voltage of the photovoltaic array is lower than the battery voltage, the battery cannot be charged.
When the output voltage output by the array is high, it may also cause overcharging of the battery and affect the life of the battery, and the adjustment of the charging voltage cannot be realized during the charging process; the battery charging control circuit with complete functions has complicated circuits and high costs. An additional power supply is required
Method used
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Embodiment Construction
[0007] The present invention will be further described below in conjunction with the drawings.
[0008] Such as figure 1 As shown, the anode of the solar cell panel PV is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to the anode A terminal of the turn-off thyristor SCR, and the cathode K of the thyristor SCR can be turned off. The cathode of the piezoelectric diode D2 is connected to one end of the inductor L, and the other end of the inductor L is connected to the anode of the battery BA. After the cathode of the battery BA is connected to the anode of the Zener diode D2, it is then connected to the cathode of the solar panel PV. When a positive and negative trigger signal is applied to the G terminal of the switchable thyristor, the switchable thyristor can be turned off by itself, which realizes the regulation of the charging voltage of the battery BA.
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The invention relates to a storage battery charging control circuit in a photovoltaic power generation system. The positive electrode of a solar cell panel is connected with the anode of a diode. The cathode of the diode is connected with the anode of a thyristor capable of being turned off. The cathode of the thyristor capable of being turned off is connected with the cathode of a voltage stabilizing diode and then connected with one end of an inductor. The other end of the inductor is connected to the anode of a storage battery. The cathode of the storage battery is connected with the anode of the voltage stabilizing diode and then connected with the negative electrode of the solar cell panel. When positive and negative trigger signals are added to the gate pole of the thyristor capable of being turned off, the thyristor capable of being turned off can be automatically turned off, and the charging voltage of the storage battery is adjusted. The storage battery charging control circuit is simple in structure, low in cost and high in reliability.
Description
Technical field [0001] The invention relates to a charging control circuit, in particular to a battery charging control circuit in a photovoltaic power generation system. Background technique [0002] Due to its renewability, cleanliness, and inexhaustibility, photovoltaic power generation has received more and more attention and promotion. As an energy storage device, the battery is an indispensable part of the photovoltaic power generation system. The power generation system needs to charge and discharge the energy storage battery during operation. In the current low-cost photovoltaic array charging circuit, the photovoltaic array directly charges the battery. Because the output voltage of the photovoltaic array changes with the outside world, when the output voltage of the photovoltaic array is lower than the battery voltage, the battery cannot be charged. When the output voltage of the array output is high, it may also cause overcharging of the battery, affecting the battery...
Claims
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IPC IPC(8): H02J7/00
CPCH02J7/0072H02S40/00Y02E10/50
Inventor 庞党锋王创荣
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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