A solar energy storage battery, also known as a “solar chip” or “photovoltaic cell”, is a thin sheet of photovoltaic semiconductor that uses sunlight to generate electricity directly. As soon as it is illuminated by light that meets certain illumination conditions, it instantly produces a voltage and, in the presence of a circuit, a current. In physics, this is known as photovoltaic (PV), for short.
Solar energy storage battery components and the function of each part.
1, tempered glass whose role is to protect the main body of power generation (such as cells), light transmission its selection is required: 1. light transmission must be high (generally 91% or more); 2. ultra-white tempering treatment.
2, EVA used to bond fixed tempered glass and power generation body (such as cells), transparent EVA material directly affects the life of the component, exposed to the air EVA easy aging yellowing, thus affecting the component light transmission, thus affecting the quality of power generation components in addition to the quality of EVA itself, component manufacturers of lamination process is also very large, such as EVA adhesive degree is not up to standard, EVA and tempered glass, backsheet bonding strength is not enough, will cause EVA early aging, affecting the life of the module. The main bonding encapsulation of the main body of power generation and backplane.
3, the main role of the cell is to generate electricity, the mainstream of the main market is crystalline silicon solar cells, thin film solar cells, both have advantages and disadvantages. Crystalline silicon solar cells, equipment costs are relatively low, photoelectric conversion efficiency is also high, more suitable for power generation in outdoor sunlight, but consumption and cell costs are very high; thin film solar cells, consumption and battery costs are very low, low light effect is very good, in ordinary light can also generate electricity, but the relative equipment costs are high, photoelectric conversion efficiency is relatively crystalline silicon cells more than half, such as the calculator on the solar cells .
4, backplane role, sealing, insulation, waterproof (generally used TPT, TPE and other materials must be resistant to aging, most component manufacturers are guaranteed 25 years, tempered glass, aluminum alloy are generally no problem, the key is in with the backplane and silicone whether it can meet the requirements.)
5, aluminum alloy protection laminate, play a certain sealing, support role.
6, junction box to protect the entire power generation system, play the role of the current transfer station, if the component short circuit junction box automatically disconnects the short-circuiting battery string, to prevent burning the entire system connected, the most critical thing in the line box is the choice of diode, according to the type of cell in the component different, the corresponding diode is not the same.
7, silicone sealing role, used to seal the components and aluminum alloy frame, components and junction box junction. Some companies use double-sided tape, foam to replace silicone, the domestic use of silicone, the process is simple, convenient, easy to operate, and the cost is very low.