20. The solar cell and battery components of the system power supply unit (1) cell: technical and material reasons, the generating capacity of a single cell is very limited, practical solar cell is a single cell through series and parallel composition of the battery systems Photovoltaic Generation join, called the battery pack (array). Single cell is a silicon diode, according to the electronic properties of semiconductor materials science, when the sun shines light junction by the PN P-type and N-type conductivity of two different types of homogeneous semiconductor material when, under certain conditions Solar radiation is absorbed by the semiconductor material of photovoltaic power generation to join, resulting in non-equilibrium carriers ie electrons and holes in the conduction band and the valence band. The same area in the PN junction barrier built there a strong electrostatic field, which can form a current density J, short-circuit current Isc, open circuit voltage Uoc in the light. If both sides of the internal electric field of the extraction electrode and connected to the load, in theory, by the PN junction, connecting the return circuit and the load is formed, so there is "photocurrent" flow-through photovoltaic solar modules to achieve a load The power P output. PV demand China's solar photovoltaic industry needs to speed up, China's photovoltaic power generation companies need to rise. Since 2002, growth of industry and the expansion of enterprise scale photovoltaic power generation equipment to related companies also provided a rare market opportunity. China's photovoltaic equipment industry has a certain scale and level, in the domestic users have established a good reputation. And leading battery companies through cooperation and integration of advanced technology, key equipment for solar domestic in China have been applied to large-scale production line and gradually become the mainstream, so that our basic with a crystalline silicon solar cell manufacturing equipment of the entire line of supply capacity . Affected by this pull, our electronic equipment industry is also showing a thriving scene for many years unprecedented. In the leading domestic battery technology and manufacturing equipment market, silicon materials processing equipment such as polycrystalline silicon ingot furnace, single crystal furnace crucible oven also actively sought after by the market. PV Merchants _ day-solar power (certified) _ caidian photovoltaic provided by Wuhan days Hui Technology Co., Ltd. giant. Wuhan Tian Hui Ju Technology Co., Ltd. (www.thjnkj.com) (www.thjnkj.cn) is a leader in Wuhan, energy-saving equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In day-solar power leadership with the staff warmly welcome all inquiries negotiations to create day-solar power a better future.