Intrinsic-safe mine lamp charging system and charging method thereof

Abstract

The invention discloses an intrinsic-safe mine lamp charging system and a charging method thereof. An intrinsic-safe mine lamp possesses a charging cell and a current-limiting resistor. The charging system comprises a detection control unit, a DC / DC direct current converter and a charging circuit unit. The charging circuit unit is connected between the DC / DC direct current converter and the intrinsic-safe mine lamp. The detection control unit, a constant current voltage stabilization unit and a charging circuit are connected so as to detect an open-circuit voltage when the intrinsic-safe mine lamp is not charged, detect a charging voltage and a charging current during charging in real time, and make the DC / DC direct current converter and the charging circuit unit charge the intrinsic-safe mine lamp. In the invention, the current-limiting resistor of the intrinsic-safe mine lamp can be measured, and according to the measured current-limiting resistor, a charging voltage and a charging current are controlled so that an effect that the intrinsic-safe mine lamp can be fully charged can be reached.

Description

technical field [0001] The invention relates to the field of digital circuits, in particular to an intrinsically safe miner's lamp charging system and a charging method thereof. Background technique [0002] According to the requirements of the State Administration of Work Safety, from October 1, 2016, Gaotu mines must use intrinsically safe miner's lamps, that is, intrinsically safe miner's lamps. The main difference between intrinsically safe miner's lamps and traditional miner's lamps is that traditional miner's lamps are made of lithium It consists of a battery pack and a battery protector. In addition to the lithium battery pack and battery protector, the intrinsically safe miner's lamp also has an intrinsically safe protection board. The intrinsically safe protection board is composed of a lithium battery protection chip, a current limiting resistor, and a PTC self-resetting insurance. Therefore, when charging the intrinsically safe miner's lamp, because the current-li...

AI Technical Summary

Problems solved by technology

[0002] According to the requirements of the State Administration of Work Safety, from October 1, 2016, Gaotu mines must use intrinsically safe miner's lamps, that is, intrinsically safe miner's lamps. The main difference between intrinsically safe miner's lamps and traditional miner's lamps is that traditional miner's lamps are made of lithium It consists of a battery pack and a battery protector. In addition to the lithium battery pack and battery protector, the intrinsically safe miner’s lamp also has an intrinsically safe protection board. The intrinsically safe protection board is composed of a lithium battery protection chip, a current limiting resistor, and a PTC self-resetting insurance. Therefore, when charging the intrinsically safe miner's lamp, because the current-limiting resistor in the intrinsically safe protection board will be charged together with the lithium battery, the voltage division caused by the current-limiting resistor will cause the lithium battery pack to obtain insufficient charging voltage, resulting in a higher voltage than the traditional miner's lamp. Longer charging time, because the coal mine uses a centralized charging rack to charge the intrinsically safe miner's lamp, the charging circuit of the existing charging rack can only provide one or several fixed charging voltages and charging currents, while the existing charging circuit provides The charging voltage is still designed for the traditional miner's lamp, so when charging the intrinsically safe miner's lamp, the charging voltage is lower than the charging voltage required by the lithium battery of the miner's lamp, so that the existing charging system cannot provide intrinsically safe miner's lamp within 10 hours specified by the standard. The miner's lamp is fully charged. In addition, due to the complexity of the miner's lamp models, the design of the intrinsically safe protection board circuit is also different. It is difficult for the existing charging circuit to adapt to a variety of different types of miner's lamps, which further reduces the charging efficiency.

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