A led uninterrupted lighting device

Abstract

The invention relates to a light-emitting diode (LED) continuous lighting device which comprises a switching power circuit, a charging circuit, a boosted circuit, a lithium battery, an LED constant current driving circuit and an LED light. When external power grid voltages are normal, the LED driving circuit is directly driven by the external power grid voltages, the lithium battery is charged by the charging circuit alone, and the fact that the lithium battery can complete whole charging circulation is guaranteed. When the external power grid voltages are interrupted, voltages of the lithium battery are instantly switched to the boosted circuit, the LED driving circuit is driven by the boosted voltages of the lithium battery, and efficiency can reach over 90%. Due to the facts that the energy density of the lithium battery is quite large, and the integration level of chips which form the circuits is high, the LED continuous lighting device can be designed to be small on the whole. Compared with other illumination lamps, an LED is powered by a direct current electric source, the illumination lamp can save electricity by over 90% compared with an electric incandescent lamp, and the service life of the LED lamp can reach up to 100,000 hours. The LED lamp is used in a construction field, electric power can be saved, and lighting quality can be guaranteed.

Description

technical field [0001] The invention relates to an LED lighting device, in particular to an LED uninterrupted lighting device suitable for construction sites, and belongs to the field of electronic technology. Background technique [0002] Construction sites, especially tunnels, underground projects and other sites, have high requirements for lighting during construction, not only requiring high brightness and reliability of lighting, but also ensuring uninterrupted lighting. At present, the traditional lighting lamps commonly used in construction sites, such as incandescent lamps, fluorescent lamps, and high-pressure sodium lamps, are powered by the AC power grid. Due to the complexity of the construction site, power outages are inevitable. In order to ensure uninterrupted lighting on the construction site, an emergency lighting power supply consisting of a rectifier, a battery and an inverter is usually installed. When the power grid is normally powered, the AC power is ch...

AI Technical Summary

Problems solved by technology

At present, the traditional lighting lamps commonly used in construction sites, such as incandescent lamps, fluorescent lamps, and high-pressure sodium lamps, are powered by the AC power grid. Due to the complexity of the construction site, power outages are inevitable

In order to ensure uninterrupted lighting on the construction site, an emergency lighting power supply consisting of a rectifier, a battery and an inverter is usually installed. When the power grid is normally powered, the AC power is charged to the battery through the rectifier. Power supply, this kind of uninterrupted lighting system has high cost and large volume, and at the same time, the power loss after multiple conversions is also large

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