Lithium iron phosphate battery in the application of photovoltaic power generation

Source: 2020 - 04 - 10 for hits: lithium iron phosphate battery in the application of photovoltaic power generation abstract: high performance energy storage battery is very important to the development of photovoltaic industry. Compared with lead-acid batteries, lithium iron phosphate batteries can than high, high storage efficiency, long cycle life, low cost advantages. Use this type of lithium battery as energy storage device can be to increase the energy efficiency to 90%, very suitable for as a new energy storage device. Compared the normal performance of lead acid battery and lithium iron phosphate batteries and energy storage properties. Based on the analysis of the lithium iron phosphate batteries as energy storage device, the feasibility of photovoltaic system, on the basis of the corresponding photovoltaic energy storage system is designed. In many renewable energy, solar energy with its green and environmental protection, inexhaustible, inexhaustible characteristics to become the most potential energy form, has a huge market prospects. Solar energy resource is very rich in our country, the development of photovoltaic industry to improve the rural and underdeveloped regions in electricity consumption is of great significance. However, photovoltaic power generation is discontinuous and unstable, generating performance changes with the change of external environment. Therefore, high-performance energy storage link is very important to the development of photovoltaic industry. At present, most of the photovoltaic (pv) systems use lead-acid battery as energy storage device. Compared with lead-acid batteries, lithium iron phosphate batteries can than high, high storage efficiency, long cycle life, low cost advantages. Compared the normal performance of lead acid battery and lithium iron phosphate batteries and energy storage properties. Based on the analysis of the lithium iron phosphate batteries as energy storage device, the feasibility of photovoltaic system, on the basis of the corresponding photovoltaic energy storage system is designed. 1. Solar photovoltaic power generation system is the basic requirement of the energy storage of solar power system has high cost, low conversion efficiency, along with the change of environment, and requires high energy storage. The service life of the solar photovoltaic power generation systems generally for 20 years, which requires the associated storage link has a long service life, stable performance, high efficiency, the characteristics of the adapt ability. At present, the energy storage technology is mainly used in the photovoltaic power generation systems such as electrochemical batteries, flywheel, superconducting coil. In contrast, the flywheel energy storage and superconducting energy storage has chemical battery incomparable advantages in performance, this will be the inevitable developing trend of energy storage device. But at present, because of technology and price, the chemical battery is still the main mode of photovoltaic energy storage. Using chemical battery as the energy storage part of photovoltaic (pv) power supply, is the chemical reaction of oxidation reduction the energy released directly into the dc energy for load. At present, the main electrochemical medium can be used as solar energy storage unit are 6, such as table 1 [ 1] Shown below. Table 1 of battery performance contrast electrochemical evaluation unit of medium voltage/V lead-acid. 2. 0 the minimum cost of nickel cadmium nickel metal cyanide 1 with memory effect. 2 is sensitive to temperature lithium 3. 6 safety, do not contain metallic lithium lithium polymer 3. Air 1 0 contains metallic lithium zinc. 2 good air management are needed to limit the self-discharge rate in these six kinds of batteries, lead-acid battery energy density is lower, but its technical maturity and the highest cost performance, so photovoltaic power generation system mainly USES the valve-control sealed lead-acid battery energy storage unit. However, with the further development of photovoltaic power generation, the battery performance and safety of higher requirements are put forward. Therefore, in urgent need of a highly efficient chemical battery as energy storage link accordingly.