Solar cell, also known as "solar chip" or "photocell", is a photoelectric semiconductor sheet that uses sunlight to generate electricity directly. The solar panel structure and functions of each part are as follows:
1.Toughened glass: its role is to protect the main body of power generation (such as battery), the selection of light transmittance is required: light transmittance must be high (generally more than 91%); Super white tempered treatment.
2. EVA: used to bond fixed toughened glass and power generation main body (battery), transparent EVA material quality directly affects the life of the component, exposed to the air EVA easy to aging yellow, thus affecting the transmittance of the component, thereby affecting the quality of power generation of the component. If the adhesive degree of EVA is not up to standard, the bond strength between EVA and toughened glass and backplane is not enough, it will cause early aging of EVA and affect the life of components.
3.Battery: the main role is power generation, power generation main market mainstream is crystalline silicon solar cells, thin film solar cells, both have advantages and disadvantages.
4.The backplane: sealing, insulation, waterproof. Generally, TPT, TPE and other materials must be aging resistant. The toughened glass and aluminum alloy of solar panels on the market are generally no problem. The key is whether the back plane and silica gel can meet the requirements.
5.Aluminum alloy: protective laminate parts, play a certain sealing, supporting role.
6.Junction box: protect the whole power generation system, play the role of current transfer station, if the component short circuit junction box automatically disconnects the short circuit battery string, prevent burning the whole system in the junction box is the most critical diode selection, according to the different types of battery pieces in the component, the corresponding diode is not the same.
7.Silica gel: sealing function, used to seal components and aluminum alloy frame, components and junction box junction some companies use double-sided adhesive strip, foam to replace silica gel, silica gel is widely used in China, the process is simple, convenient, easy to operate, and the cost is very low.
