Long-acting integrated power supply system based on thin-film solar battery and charging method

Abstract

The invention discloses a long-acting integrated power supply system based on a thin-film solar battery. The long-acting integrated power supply system comprises energy storage equipment which comprises a thin-film photovoltaic module, a super capacitor module, a charging and discharging controller, a voltage regulator module and a lithium battery component, wherein an output end of the thin-film photovoltaic module is connected with an input end of the super capacitor module; the output end of the super capacitor module is connected with the input end of the charging and discharging controller; the output end of the charging and discharging controller is connected with the voltage regulator module; the lithium battery component is connected with the charging and discharging controller; the thin-film photovoltaic module is a flexible or rigid thin-film solar battery; and the rated voltage of the thin-film photovoltaic module is higher than the maximal voltage of the lithium battery component. According to the long-acting integrated power supply system, which is light, efficient and long in lifetime, based on the thin-film solar battery and the charging method, the weak light power generating performance of the thin-film photovoltaic module and the low-voltage charging performance of the super capacitor are fully utilized; and the long-acting integrated power supply system has the advantages of efficient weak light power generation and high overall system efficiency.

Description

technical field [0001] The patent of the invention belongs to the technical field of off-grid photovoltaic energy storage, and specifically relates to a long-term integrated power supply system based on thin-film solar cells. Background technique [0002] At present, solar cells are widely used in power stations, monitoring, street lamps, lawn lamps, etc. because of their huge resources, clean and pollution-free, and easy installation. In practical applications, general energy storage devices for solar cells are lead-acid batteries, lithium batteries, supercapacitors, etc. For lead-acid batteries, they are bulky, not conducive to installation, have a short service life, and cannot supply normal power to loads in harsh winter weather. Therefore, lithium batteries are smaller in size and lighter in weight due to the same capacity. However, due to the complexity of the lithium battery system and high cost, its application has also received certain limitations. [0003] In the...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the limitations of the above-mentioned existing solar cells, and to propose a light, efficient, and long-life long-term integrated power supply system based on thin-film solar cells to solve the problems caused by the independent power supply of lead-acid batteries or supercapacitors. There are problems of short service life or high cost, high volume and weight, poor charging efficiency under low light conditions of the system, or load equipment cannot be started normally under harsh weather conditions

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