Battery life is an important factor to determine the life of solar spike.In 2014, there are two types of batteries on the market for reference. One is that after 500 charges and discharges, the battery capacity is reduced to 50%.The other is that after 1,000 charges and discharges, the battery capacity drops to 79%.
Battery life should not only be long, but also be able to operate within a large temperature range.There are chemical substances inside the battery. If the temperature is too high or too low, the battery cannot work. The operating temperature range of the solar spike battery must meet the requirements of the actual use environment.The national department of transportation requires a range of -10 to 50 degrees, and the actual environment tends to go beyond that, which puts higher demands on batteries.
Electronic circuit board design must follow simple and effective design principles, do not artificially complicated, because more than one circuit is more than a possible failure.Electronic components should also be selected carefully, because any problem with an electronic component could paralyze the entire system.
Welding must be solid, because every day the solar energy road nail bears the rolling and impact of the vehicle, a little bit of loose solder will lead to loose and fall off the line.Therefore, when choosing welding gun and soldering tin, we must choose high-quality products to ensure that the solder joint is firm and reliable and can work in a relatively "bad" environment for a long time.
Solar panels solar panels directly absorb solar energy, and convert light energy into electricity, can be said to be the first link in the whole work system of solar spike;Its working efficiency directly determines the working efficiency of solar spike.Until 2014, monocrystalline silicon solar panels were widely used. This is because monocrystalline silicon solar panels have a high photoelectric conversion rate, about 14%, which can maximize the conversion of solar energy into electricity.
The rated capacity of the battery should meet the requirement of normal shining of the spike for 72 hours after it is placed for 8 hours under standard test conditions.Even if the solar irradiance is less than 1000LX, the rated capacity of the battery after 8 hours of charging should meet the requirement of normal shining of spike for 12 hours.Special attention must also be paid to this point.If the battery does not match well, the battery will not be able to store enough power in rainy weather, which will cause the solar spike to fail to shine.In this way, the solar spike has no practical value, it can not be used.This is the limitation of capacitive solar spike.The rated capacity of the capacitor can only meet the requirement of 12-14 hours of normal luminescence of the spike when placed under the standard test conditions for 8 hours. Therefore, the requirements of the practical use environment of the capacitor solar spike are very strict. It is not only necessary to have strong sunshine, but also can't have continuous rainy weather, otherwise it is difficult to work normally.
The use of solar spike environment is complex and changeable, temperature, humidity may be very different.
The northern winter temperature is very low, the southern summer temperature is very high, the northwest region day and night temperature difference is particularly large, wet southeast, northwest dry, these will affect the normal work of the solar spike, so the solar spike design should be fully considered the environmental adaptation performance.
So far in 2014 the ministry of communications to the requirement of temperature is 20 ℃ to 85 ℃ range, as well as between 20 ℃ and 60 ℃ do three cycling test, to see if it can adapt to the environment.The ministry of communications for solar spike hot and humid performance requirement is that under the condition of 45 ℃, relative humidity 98% test can still work normally after 48 hours.
The environmental adaptability of solar spike is a comprehensive test of its mechanical and electrical properties, involving structural design, circuit design, electronic device performance and other aspects, even including its production process.This also requires all aspects of the work to do, in order to ensure that the solar spike has a good environmental performance.