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Composition of Solar Street Lamp
Feb 03, 2019

Major Composition - Solar Panels

Solar panels, also known as "solar chips" or "photovoltaic cells" or "solar cells", are photoelectric semiconductor sheets that generate electricity directly from the sun. Solar cells are devices that directly convert light energy into electrical energy through photoelectric or photochemical effects. Polycrystalline silicon and monocrystalline silicon solar cells with photoelectric effect are the mainstream. Solar light irradiates the semiconductor p-n junction, forming a new hole-electron pair. Under the action of the electric field of the p-n junction, the hole flows from n to p, and the electron flows from P to n. The current is formed by connecting the circuit.

Classification of Solar Cells: Single Crystal Silicon Batteries, Polycrystalline Silicon Batteries, Amorphous Silicon Batteries, Thin Film Batteries

There are also great differences among different types of solar cells, as follows:

Main Composition - Battery

Store electric energy into chemical energy, and convert chemical energy into electric energy again when discharge is needed. This kind of battery is called storage battery.

Generally there are lead-acid batteries, Ni-Cd batteries, Ni-H batteries, lithium batteries. The selection of storage battery capacity should generally follow the following principles: firstly, on the premise of satisfying night lighting, the energy of solar cell components during the day should be stored as much as possible, and at the same time, the energy needed to meet the lighting needs of continuous rainy and rainy days at night should be stored. Battery capacity is too small to meet the needs of night lighting. Battery capacity is too large, battery energy can not be used, resulting in waste. Batteries should be matched with solar cells and electric load (street lamps). A simple method can be used to determine the relationship between them. Battery capacity is required to meet the sum of energy consumed in rainy and cloudy days, and the power of solar panels can be filled with batteries under one day's effective light conditions.

Main Composition - Photovoltaic Controller

Photovoltaic Controller: An automatic control device that controls the charging of batteries by solar panels and the power supply of batteries to loads. Regardless of the size of the solar street lamp, a good charge and discharge controller is indispensable. In order to prolong the service life of the battery, the charging and discharging conditions must be limited to prevent the battery from overcharging and deep discharging. Where the temperature difference is large, the qualified controller should also have the function of temperature compensation.

Main Composition - LED Light Source

LED (Light Emitting Diode) is a solid-state semiconductor device. The carrier recombination in the semiconductor causes photons to reflect and produce light. It has the advantages of high brightness, energy consumption, long life, fast start-up, low power, no stroboscopic, not easy to produce visual fatigue and so on.

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