Solar battery knowledge strategy

What is a solar cell? Solar cell, also known as solar chip or photovoltaic cell, is a light conductor sheet that uses sunlight to directly generate electricity. As long as certain lighting conditions are met, it can output loop voltage and current in an instant. In physics, it is called photovoltaic (PV), an abbreviation for photovoltaic. Solar cells are devices that directly convert light energy into electrical energy through the photoelectric effect or photochemical effect. Thin-film solar cells driven by the photoelectric effect are the mainstream, while the realization of solar cells driven by the photochemical effect is still in its infancy. (Detailsu003eu003e) The principle of solar cells The sun shines on the semiconductor p-n junction to form a new cavity-electron pair. In the use of the built-in electric field in the p-n junction, the holes generated by the light flow to the p region, and the electrons generated by the light flow to the n region, and the current appears after the circuit is closed. This is how photovoltaic cells work. There are two methods for solar power generation, one is the photo-thermal-electric conversion method, and the other is the photo-electric direct conversion method. The photothermal-electric conversion method uses the thermal energy generated by solar radiation to generate electricity. Under normal circumstances, the solar collector converts the absorbed heat into working fluid steam, and then drives the steam turbine to generate electricity. Solar cells directly convert light into electrical energy, which generates electricity based on the photoelectric characteristics of a special material. Black bodies (such as the sun) emit electromagnetic waves of different wavelengths (corresponding to different frequencies), such as infrared, ultraviolet, and visible light. (Detailsu003eu003e) 3 Solar cell application categories 1. Space and space development and high-tech applications. Solar cells are first used in space technology due to their reliability and superiority. In 1958, solar cells were installed on artificial satellites for the first time. 2. Industrial and agricultural processing applications. As a new type of energy, it has been widely used in industry and agriculture. In the inaccessible mountains and seas, various lighthouses, various satellite communication receiving stations; various remote control telemetry, meteorological observation stations, and highway and railway active signal lights have become the preferred power sources. 3. Small civilian products. At that time, solar cell photovoltaic products had a wide variety of products and projects, which became consumers' motivation in many aspects. (Detailsu003eu003e)Solar battery package 1. The purpose of tempered glass is to maintain the main body of power generation (such as battery), and the light transmittance should be selected: 1. 2. Gelash Strait steel treatment. 2. EVA is used for bonding and fixing toughened glass and power generators (such as batteries). The quality of Tongming EVA material directly affects the service life of components. The main body and back panel of the main adhesive package. 3. The important use of batteries is to generate electricity. Important products in the power generation market are crystalline silicon solar cells and thin-film solar cells. 4. Backplane effect, sealing, insulation, waterproofing (usually TPT, TPE and other materials are necessary anti-aging materials, most component manufacturers guarantee 25 years, tempered glass, aluminum alloy generally have no problems, the key is Whether the backplane and silica gel can meet the requirements. 5. The aluminum alloy maintenance laminate is used for sealing and supporting purposes. 6. The junction box is the maintenance of the entire power generation system and exerts the influence of the current transfer station. It is assumed that the component is short-circuited and the junction box is actively disconnected Short-circuit the battery string to prevent burning of the entire system. The most important thing is to choose a diode. According to the type of battery package, the corresponding diode is different. 7. The silicone sealing effect is used to seal the component and the aluminum alloy frame, component and At the junction of the junction box, some companies use double-sided tape and foam instead of silica gel. Silica gel is widely used in our country. The process is simple, convenient, easy to operate, and the cost is very low. (Detailsu003eu003e) Solar panels, charge controllers, inverters and batteries are packaged. Solar DC systems do not include inverters. In order to enable the solar power generation system to supply enough power to the load, various components must be selected reasonably according to the power of the electrical appliances. : Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Why does the lithium battery wear out after a long time?