08.Junction Box

The junction box is mainly composed of a junction box cover, a sealing ring, a diode, a heat sink, a box body, a wire and a connector. The main function of the junction box is to connect the electricity generated by the solar cell to an external line. The utility model can play the role of sealing, waterproof and dustproof for the lead-out wire of the photovoltaic module. The junction box also has the function of protecting the safe operation of the PV module system. If the module is short-circuited, the junction box will automatically disconnect the short-circuited battery string to prevent the whole system from being burned out.

07.Silicone

Silica gel is mainly used for bonding and sealing laminated glass photovoltaic components, bonding frame and glass, junction box and back plate (or glass) , play a sealing and connecting role. According to the use of different locations, silicone is divided into sealant and filling sealant. The sealant is used in the slot of the frame and at the bottom of the junction box and the back plate.

06.Welding tape

Photovoltaic welding strips are composite conductive materials formed by coating tin-based solders on the surface of copper strips. They are used in series or parallel connection of photovoltaic cells to concentrate current and conduct electricity, it is an important material in PV module welding process. The PV welding belt is divided into interconnection welding belt and bus welding belt. The interconnect welding tape is used for connecting the photovoltaic cells, collecting and transmitting the current of the photovoltaic cells. The bushing is used to collect the current produced by the battery string and lead it to the junction box. The welding strip has a direct effect on the current collection, which in turn affects the power and generation efficiency of the module. The industry is the early use of flat welding tape, with the development of the industry, the current high-efficiency components are using round welding tape.

05.Border

Photovoltaic frame is installed in the glass epitaxy of the frame, mainly used for fixed, sealed solar modules, photovoltaic modules for the transport and installation. The installation of the frame is beneficial to protect the glass edge and enhance the sealing performance of the PV module. At the same time, the use of the frame can improve the mechanical strength and anti-load capacity of the whole component, thus extending the life of the component.

04.Backboard

PV backplane is used as packaging material for backside protection, generally used for single glass module. PV backplane is divided into fluorine backplane and non-fluorine backplane, fluorine backplane includes TPT, TPE, TPC, CPC, non-fluorine backplane includes PET, PA/Po and so on. Photovoltaic backplane is mainly used to resist the wet and hot environment on the battery, film and other materials, corrosion resistance, weather resistance, anti-oxidation and insulation protection, can effectively extend the service life of components. The white back plate has high reflectivity and can improve the conversion efficiency of the module. At the same time, the high infrared reflectivity is also convenient to reduce the operating temperature of the module.

02.Glass

Photovoltaic glass is a kind of sodium-calcium silicate glass, mainly used in the packaging of photovoltaic modules. Photovoltaic glass will directly affect the power generation efficiency and service life of photovoltaic modules. Photovoltaic (PV) glass is typically made of low-iron toughened glass or toughened glass with the following properties. One is good permeability. Light transmittance is a key factor affecting the conversion efficiency of photovoltaic cells. Photovoltaic glass should have high light transmittance and high reflectivity to 1200nm infrared light. Second, high mechanical strength. Impact resistant, can withstand 2400Pa wind pressure and 5400Pa snow pressure, play a supporting and protective role. Third, good durability. Due to the influence of climate and geographical location, the module needs to work in the open air, day and night temperature difference environment, need to have corrosion resistance, weather resistance characteristics.

01.Battery pack

The cell is the core component of the module, which is used to convert light energy into electricity. The photovoltaic modules are formed after the cells are connected in series and parallel to reach a certain rated output power and voltage. The photovoltaic modules are combined to form a photovoltaic array, which is connected with the controller, battery pack, inverter and other components to form a photovoltaic power generation system.

Solar cells are divided into monocrystalline silicon, polycrystalline silicon, amorphous silicon solar cells. The technology of crystalline silicon battery is based on silicon wafer as substrate, which is generated by photogenerated carrier separation based on PN junction. According to the difference of raw material and preparation technology, crystalline silicon battery can be divided into p-type Battery and n-type Battery.