Independent power supply system

Abstract

An independent power supply system comprises a power source control unit (51) for controlling discharge to a connection terminal (9) of a battery (4), a first power supply unit (6) for supplying an electric power generated by a solar battery (2) to the power source control unit (51) as an operation power, a second power supply unit (7) for supplying an electric power stored in the battery (4) to the power source control unit (51) as the operation power, and a switching element (72) for inhibiting the second power supply unit (7) from supplying the operation power to the power source control unit (51) when the terminal voltage of the battery (4) does not meet an operational voltage threshold. During a period in which the switching element (72) turns off and stops operating, when the electric power generated by the solar battery (2) is supplied by the first power supply unit (6), the power source control unit (51) is activated to turn on the switching element (72).

Description

technical field [0001] The present invention relates to an independent power supply system that charges a storage battery with electric power generated by natural energy such as sunlight or wind power, and supplies electric power to various external loads such as cameras and sensors. Background technique [0002] Conventionally, an independent power supply system that uses natural energy such as sunlight or wind power to store electricity can independently supply electricity without receiving electricity from a power company. Therefore, such an independent power supply system is used as a power supply device that can be easily installed outdoors without the need for electric wire laying works managed by the electric power company. Such an independent power supply system uses natural energy such as solar cells or windmills to generate electricity, so the amount of power generated varies due to changes in various natural environments such as weather, seasons, and climates in t...

AI Technical Summary

Problems solved by technology

Also, if the control circuit stops working, it is impossible to monitor the battery voltage or power generation

In this way, even if the amount of power generation increases again due to changes in the natural environment, the control circuit cannot detect the increase in power generation, and as a result, the discharge of the battery remains prohibited, and there is a problem that power cannot be supplied to the load.

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