Some problems in current solar LED lamps and lanterns,
1)
At present, the main problem of solar energy LED lamps and lanterns is heat dissipation problems is not good, such as based on the integrated design of the metal shell, fan and heat pipe radiator support, effective dust (
The dust will greatly hinder the cooling)
, such as
the problems existing in the solar energy light emitting diode lamp
(
1)
At present the main problem with solar led lamps and lanterns is heat dissipation problems not well solved, such as integrated design based on the metal shell, fan and heat pipe radiator support, effective dust (
Dust will greatly hinder the cooling)
And so on.
, which results in the decrease of luminous efficiency, and light attenuation problem is more serious, even failure.
(
2)
In lighting applications, light-emitting diodes (
leds) is essentially a point source.
Its optical design, including the lens or reflector design and optical design, is one of the main application difficulty.
(
3)
Low luminous efficiency of led light source itself.
At present, the industry power leds maximum photosynthetic efficiency of 80 mm/tile, lower than the current widespread use of high pressure sodium lamp.
(
4)
Special LED constant current drive power is the foundation of guarantee its normal work, a simple switch power supply scheme often damages to the LED device.
LED street light, therefore, to further promote depends on light, heat, electricity integral solution is becoming more and more mature.
(
5)
The cost of a single light emitting diode is relatively high.
1 w - most of the imports
The price of 3 w leds is about 3 dollars, and the price of made in China more than $10 (
Quality is poor and there is no intellectual property rights)
。
A light 90 light-emitting diodes and solar modules, controllers, batteries and light pole lamp is much taller than the price of common high pressure sodium lamp, this makes the promotion of
solar led street lamp is very difficult.
(
6)
Battery life is too short, the service life of the solar panels more than 25 years, and only 2 - the service life of batteries
3 years, so the battery is the weakest link in the solar system.
Energy storage capacitor can solve this problem to some extent, but its application is limited by expensive.
Currently, it is only applicable to some traffic lights and chandeliers.
With the improvement of technical level and the reducing of the product price, it will be the most promising one of match the solar cell energy storage element.
