Solar cell

Abstract

The invention discloses a solar cell. The solar cell comprises a light acquiring / switching module and a voltage increasing module. The voltage increasing module is formed by a voltage increasing circuit capable of reducing stress of a voltage switch. The voltage increasing circuit is comprises the voltage Vin input by the light acquiring / switching module, switch elements S1, S2, diodes D1, D2, an inductor L, an input capacitor C1, a middle capacitor C2 and an output capacitor Co. An input power supply generates input voltage Vin. The switch elements S1, S2 are respectively provided with stray capacitors CS1, CS2. By controlling on and off of the switch elements S1, S2, output voltage of the solar cell is increased and energy loss is reduced.

Description

【Technical Field】 [0001] The invention relates to a solar cell, in particular to a solar cell that reduces the stress of voltage switching and has a high output voltage. 【Background technique】 [0002] In the solar power generation system, since a single solar cell provides low-voltage direct current, it cannot meet the electricity demand of existing electrical equipment, nor can it meet the requirements of grid connection. Therefore, it is necessary to convert low-voltage direct current into actual The required high voltage direct current. Therefore, the boost converter with high gain and stable performance has become a research hotspot, and this research is of great significance to promote the development of the photovoltaic cell industry. [0003] The most basic boost converter is a single-tube Boost converter. However, the boost range of this kind of converter is very limited, and it is difficult to meet the high-gain conversion requirements, and the switching tube voltage str...

AI Technical Summary

Problems solved by technology

At this time, the conversion process of electric energy is actually changed from the original DC-DC to DC-AC-AC-DC, and the energy conversion efficiency of the whole system is reduced.

[0006] The second is to use coupled inductors, but the structure of coupled inductors is complex, which is not conducive to industrial processing, it is difficult to ensure the consistency of the circuit, and it will cause excessive voltage stress of switching devices, which will bring electromagnetic interference and other effects, resulting in large operating losses of the converter.

[0007] The third is to add cascaded boost units, the more units, the greater the voltage gain, but the more circuit components, the more complex the structure

However, this boost circuit requires too many components such as switches, capacitors, and diodes, resulting in a complex circuit structure and high cost.

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