Photovoltaic Cable Manufacturers Use Uneven Semiconductors To Cause Potential Differences

The photoelectric effect of a photovoltaic cable manufacturer in a group in some company is a phenomenon in which the semiconductor is uneven or the potential difference between the semiconductor and the metal is caused by light.

The first is the process of converting photon light waves into electrons and light energy into electrical energy. Second, is the process of forming a voltage. After ingot casting, ingot breaking, and slicing, polysilicon is made into silicon wafers for processing. The phosphorus-nitride junction is formed by doping and diffusing trace amounts of boron and phosphorus on the silicon wafer. Then, by screen printing, the finely prepared silver paste is printed on the silicon wafer to form a grid line, and the back electrode is made at the same time after sintering, and an anti-reflection coating is coated on the surface of the grid line to complete the battery sheet.

When the cells are lined up to form a battery assembly, a large circuit board is formed; typically, an aluminum frame wraps around the component, with glass on the front and electrodes on the back. With battery components and other auxiliary equipment, a power generation system can be formed. In order to convert direct current into alternating current, it is necessary to install a converter; the generated power can be stored in batteries or fed into the public grid. In the system cost, the battery component accounts for about 50%, and the current converter, installation cost, other auxiliary components and other expenses account for the other 50%.

Grid-connected photovoltaic power generation refers to the conversion of DC power generated by solar modules into AC power that meets the requirements of commercial power grids through grid-connected inverters, and then directly connected to the public power grid; it can be divided into grid-connected power generation systems with batteries and without batteries; Grid-connected power generation systems with batteries are dispatchable and can be integrated into or withdrawn from the grid as required. It also has the function of backup power supply, which can provide emergency power supply when the power grid fails for some reason; photovoltaic grid-connected power generation systems with batteries are usually installed in residential buildings. Grid-connected power generation systems without batteries do not have the functions of dispatchable and backup power, and are generally installed on larger systems. Grid-connected photovoltaic power generation includes centralized large-scale grid-connected photovoltaic power stations, which are generally J-level power stations in China. The main feature is that the generated energy is directly transmitted to the power grid, and the power grid is uniformly distributed to provide power to users. However, this type of power station requires a large investment, a long construction period, and a large area, so there is not much development. Distributed small-scale grid-connected photovoltaics, especially building-integrated photovoltaic power generation, have become the mainstream of grid-connected photovoltaic power generation due to their advantages of small investment, fast construction, small footprint, and strong support.

Distributed photovoltaic power generation and distributed photovoltaic power generation system Photovoltaic cable manufacturer of a group in Shenzhen, also known as distributed power generation or distributed energy supply, refers to the configuration of smaller photovoltaic power generation and power supply systems near the user site or power consumption site to Meet the needs of specific users, support the economic operation of existing distribution networks, or meet the requirements of both. The basic equipment of the distributed photovoltaic power generation system includes photovoltaic cell modules, photovoltaic shelters, DC junction boxes, DC power distribution cabinets, grid-connected inverters, AC power distribution cabinets and other equipment, in addition to power supply system monitoring devices and environmental monitoring devices . Its operation mode is that under the condition of solar radiation, the solar cell module array of the photovoltaic power generation system converts the solar energy to output electric energy, sends it to the DC power distribution cabinet through the DC bus box, and converts it into AC power for the building's own load by the grid-connected inverter. , by accessing the grid to regulate excess or insufficient power.

What is photovoltaic energy storage?

Photovoltaic energy storage is a solar photovoltaic energy storage power generation system. Dongguan XSD Cable Technology Co., Ltd. stores the electric energy generated by the photovoltaic system. When the photovoltaic system is insufficient, it provides electricity to the outside world through corresponding power dispatching. Photovoltaic energy storage classification According to different application places, photovoltaic energy storage can be divided into photovoltaic off-grid power generation system, parallel off-grid energy storage system, photovoltaic grid-connected energy storage system and micro-grid energy storage system. Among them, the photovoltaic grid-connected energy storage power generation system can store excess power generation and increase the proportion of spontaneous use. The system consists of a photovoltaic array composed of solar cells, a solar controller, a battery pack, a grid-connected inverter, a current detection device and a load.

When the solar power is less than the load power, the system is powered by solar and grid.

When the solar power is greater than the load power, a part of the solar power supplies power to the load, and the other part is stored by the controller.

Of course, there are other surface treatment methods for the aluminum frame of photovoltaic modules. Today we will take a look at the surface treatment method of the aluminum frame of the photovoltaic module.

1. Anodizing is an electrochemical oxidation process. The aluminum profile of the frame is used as the anode, and a dense and transparent oxide film is formed on the surface of the aluminum profile by electrolysis. Although this oxide film is very thin, it is very hard, which greatly changes the state and performance of the surface of the frame, and becomes very wear-resistant and corrosion-resistant.

2. Sandblasting oxidation, that is, use a sandblasting machine to sandblast the aluminum profile of the frame, and use fine emery to knock out fine pits on the surface of the frame. What the naked eye sees is a matte effect, which is a physical change. After sandblasting, the frame goes through a new anodizing step, which is our common sandblasting anodized aluminum profiles.

Photovoltaic power generation application field

1. User solar power supply:

(1) Small power supplies in the range of 10w-10-100W, used for military and civilian life in remote areas without electricity such as plateaus, islands, pastoral areas, and border posts, such as lighting, TV, tape recorders, etc.;

(2) 3-5KW household roof grid-connected power generation system;

(3) Photovoltaic water pump: solve the problem of deep well drinking water irrigation in areas without electricity.

2. Navigation lights, traffic/railway signal lights, traffic warning lights/sign lights, Yuxiang street lights, high-altitude obstruction lights, highway/railway wireless kiosks, unattended power supplies and other transportation fields.

3. Communication/communication field: solar unattended microwave relay station, optical cable maintenance station, broadcast/communication/paging power supply system; rural carrier telephone photovoltaic system, small communicator, Shibing GPS power supply, etc.

4. Petroleum, marine and meteorological fields: cathodic protection solar power supply systems for petroleum pipelines and reservoir gates, domestic and emergency power supplies for oil drilling platforms, marine detection equipment, meteorological/hydrological observation equipment, etc.

5. Household lighting power supply: such as garden lights, street lights, portable lights, camping lights, mountaineering lights, fishing lights, black lights, rubber tapping lights, energy-saving lights, etc.

6. Intransitive photovoltaic power station: 10KW-50MW photovoltaic power station, wind-solar (diesel) complementary power station, various large parking plant charging stations, etc.

7. Solar buildings Combining solar power generation with building materials to make large buildings self-sufficient in electricity in the future is a major development direction in the future.

8. Other fields include

(1) Matching with automobiles: solar vehicles/electric vehicles, battery charging equipment, automobile air conditioners, ventilation fans, cold drink boxes, etc.

(2) Solar hydrogen production and fuel cell regeneration systems;

(3) Seawater desalination equipment power supply.

(4) Satellites, spacecraft, space solar power plants, etc.