LED miner's lamp cold light source 
 KL4LM (B) type LED cold light of a miner's lamp, Overview 1.1 Features KL4LM (B) type miner's lamp is based on GB7957-2003 "General requirements for safety miner's lamp," and other relevant provisions of the standard design and manufacture of the miner's lamp with a small size, light weight , portable and easy to carry, long life, according to high, fast charge, no pollution, maintenance, electricity and the use of provincial security, etc., when the main light source is damaged or exceed the lighting time to time, the only other way toggle switch LED auxiliary light source provided for the mine workers were the dim light illumination, while in the underground scene in case of a special life-saving when the dim light played a role. Auxiliary light source can be continuous for 30 hours or more. The use of lithium-ion battery miner's lamp power and a built in battery over charge, over discharge, over current, overheat protection circuit, extending battery life. The miner's lamp battery mounted on the head, therefore lightweight structure, use of personnel is very convenient to carry, and enhance efficiency. 1.2 The main purpose and scope of application KL4LM (B) type miner's lamp (hereinafter referred to miner's lamp), mainly for coal mine portable lighting can also be used in chemical mining, metal mining, tunneling, field work and other places at night to carry the staff lighting tool. 1.3 Use of environmental conditions and working conditions of a) an ambient temperature of -5 ℃ ~ +40 ℃; b) the ambient air relative humidity less than 95% (+25 ℃ time); c) atmospheric pressure (80 ~ 106) Kpa range within; 1.4 Model 1.5 Product performance standards mean GB7957-2003 "General requirements for safety miner's lamp" Q/BY005-2005 "KL-type miner's lamp," Ex 1.6 Product Type ExsI. Second, the structure and working principle of 2.1KL4LM (B) type miner's lamp from the lamp assemblies, lithium-ion batteries, security devices and charging circuit, etc.) structure, battery components directly mounted on the lamp, the lamp features a LED light source, lamp can be fixed in the mining helmet. 2.2L4LM (B) type miner's lamp from the power supply, lamp, LED light-emitting diodes, switches and other components of the basic circuit, the lamp is equipped with circuit switch that controls the main light or auxiliary light-emitting or off, by charging lamp, lamp is equipped with charging devices, lithium battery with short circuit protection device, in the event of short circuit that can automatically cut off power supply to ensure safety. Main technical parameters of the main technical parameters in Table 1 miner No. Item Unit Value 1 Rated voltage V 3.7 2 Rated capacity Ah 4 3 lighting time h ≥ 11 4 LED light Rated voltage V 3.7 Main light source rated current auxiliary light source A 0.12 A 0.35 5 maximum illumination (at 1m distance) starting lx ≥ 1300 lighting lamps 11h lx ≥ 1000 6 lithium-ion battery life time ≥ 500 (charge and discharge cycles)