The problems existing in the system of cold area of lED street light

Although high altitude and cold environment conducive to heat dissipation of lamps and lanterns, but generally people don't know for the LED street lamp solar street lamps have more strict technical requirements, in particular, this is because first of all, the low temperature cold area, temperature difference is big, dramatic changes of the cold and hot alternate and long-term

in cold region, although the cold environment is conducive to the heat dissipation of lamps and lanterns, but most people don't know about the LED street lamp, especially the solar street light have more strict technical requirements, because first of all, the electrical components in low temperature, large temperature difference, heating and severe changes and long-term cold area of cold work must have a high job performance. Second, in the mountain environment, the light-emitting diode traffic lights manufacturers use road icing phenomenon, it will easily cause the damage of the lamp or fail. Precautions must be taken to prevent ice condensation. Therefore, the following key technical issues need to be solved. A, cold and hot shock caused by the light emitting diode device failure due to the led street lamp chip is a solid state devices, chips, silica gel, Or resin) And coefficient of expansion between the metal stents and lead can be difficult to completely consistent. Under the intense temperature changing cold area of cold and hot shock, silica gel in the temperature variation in the process of expansion and contraction increases, lead to internal stress is too large, easy to cause the leads of the led street lamp lights, increase, premature fatigue of solder joint displacement and lead damage and cause failure. In this environment, bad condition of welding spot will happen desoldering, led street lamp also can appear the fault such as delaminating chip. Two alpine environment, the reliability of the light emitting diode drive to ensure that the problem of traditional led street lamp driver power supply used in cold environment running in low temperature environment for a long time, often start in low temperature anomalies and the phenomenon of high failure rate. The main reason lies in the design phase of drive power supply units selection. Due to the nature of electrical components in low temperature environment change, drive cannot start or work normally under low temperature, so you must choose to have good temperature characteristic of components. This will certainly increase the cost, but make sure that the led street lamp work stability and service life. Three led street lamp condensation, cold environment protection problems in cold areas use led lights, lamps and lanterns of the shell is usually use aluminum, the surface of alumina is hydrophilic material, especially easy to freeze, lead to the led street lamp product failure or collapse, damaged electric power facilities, serious impact on road traffic safety. To reduce or avoid freezing measures include: the appearance of the led lights should be smooth, level off; Absolutely avoid ice or water bearing structure; The hydrophobic performance of led street lamp surface material. Fourth, for the solar street lamp, and a battery insulation problems. In addition to choose strong cold resistance of battery, we should also be buried and so on heat preservation work.