On this issue, there are actually several reasons! The first reason is out of the factory production, a lot of manufacturers, in order to make a profit in it, do not add led light source, so that an electric car can earn 50 yuan, and manufacturers of cars are generally a lot of, so it earns a profit is also very considerable, especially about the LED light source of some protection parts, manufacturers in order to save money, as long as the function of the light source to reach the, no longer! Installation of those protective parts, can earn a penny to earn a penny.
For example, many electric cars on our market now, they are replaced with led lighting, this light and power saving and good-looking, but LED lamp beads heat dissipation and the lampshade add up to be more expensive than halogen lamps and hernia lamps, so that's why only the high-end electric cars will be installed with LED light source. But the installation of LED light source car and electric car prices are much more expensive than the installation of halogen lamps, so although the cost increases, but manufacturers can earn profits is higher
And electric car driving speed is slow, basically installed LED lights can be bright on the line, while the car is equipped with LED lamps on the requirements of a much higher, to ensure that the width of the light, but also to ensure the light of the Range, and rainy and foggy weather penetration, spotlight, brightness, service life and so on a series of issues, so this greatly increases the cost of LED lights, of course, LED lights also has energy saving, slow light decay, high brightness advantages, especially high-quality LED service life can be up to more than 30,000 hours and other advantages of the future trend of the development of automotive lamps.
So although the two are installed LED lights, but the cost of manufacturing is a world of difference, for example, the car in order to ensure that the brightness of the LED light source and the ability to penetrate, but also on the number of light sources and lenses to make adjustments, this part of the cost is still very large, especially now many car companies in order to make the headlights are very sci-fi feeling, modeling is also very complex, often car The manufacturing cost of an LED light source is more expensive than an electric bicycle!
It is believed that car enthusiasts have understood, although now a few thousand dollars of electric cars have been installed LED light source, but with the car on the LED light source is still a certain difference, this point car enthusiasts should know. Why do you think this is
Maybe many people will think that this is the true face of the LED car headlights, I can only say, it's really not so simple. Most of the LED lights sold on the market now are similar to this, this form is just a replacement program, just like the incandescent lamps we used to use at home, now replaced with LED bulbs, this is the replacement, can not be counted as the real LED car headlights.
We then calculate the cost of this LED light on the map, it is probably the bill of materials: a lamp board (copper-based) + two lamp beads (according to the CREE calculation) + the middle of the thermal conductivity of the copper + aluminum radiator + fan + driver module + other fasteners, all with branded good material, the cost of calculating the cost of not more than 100 yuan a bar. This is the same kind of light that is used on the ebike mentioned in the question, which may be made of even worse materials and cost even less.
The real vapor light LED headlight, need to cooperate with the optical design, thermal design, structural design, electrical control, service life is equal to a whole. Previously have seen a dismantled Citroen C6 (parameters | pictures) LED headlights article, we can probably look at its internal structure.
The LED control unit can be clearly seen on the dense raised cylinders, this is used to increase the heat dissipation area of the metal material.
The high beam low beam is separate and comes with specialized reflectors and lenses.
The disassembly begins like this, with a lamp bead, circuit board, radiator, reflector and lens.
In order to solve the problem of heat dissipation LED headlamp cooling, it is also necessary to add active cooling on the metal radiator, that is, the fan (a better fan will be able to offset the total cost of a replacement LED headlamp as mentioned earlier). This is Citroen's LED headlight assembly, if replaced with Audi, BMW should be even more complicated and costly.