High-performance energy storage battery is essential for the development of photovoltaic industry. Compared with lead-acid batteries, lithium iron phosphate battery has a high energy, energy storage efficiency, long cycle life, the use of low cost advantages. With this type of lithium battery as an energy storage device, the energy efficiency can be increased to about 90%, so it is very suitable for use as a new energy storage device. On the conventional performance, energy storage characteristics and other aspects of lead-acid batteries and lithium iron phosphate batteries were compared. Based on the analysis of the feasibility of using lithium iron phosphate battery as the energy storage device of PV system, the corresponding photovoltaic power storage system is designed.
In many renewable energy, solar energy with its green, environmental protection, inexhaustible and other characteristics become the most development potential of energy forms, with huge market prospects. China has a very rich solar energy resources, the development of photovoltaic industry in China underdeveloped areas and remote areas of electricity improvement is of great significance. However, the photovoltaic power generation with non-continuity and instability, power generation performance changes with the external environment changes, therefore, high-performance storage of photovoltaic industry is essential.
At present, most of the photovoltaic systems use lead-acid batteries as energy storage devices. Compared with lead-acid batteries, lithium iron phosphate batteries with high energy than the energy efficiency, long cycle life, the use of low cost advantages. This article on the conventional performance, energy storage characteristics of lead-acid batteries and lithium iron phosphate batteries were compared. Based on the analysis of the feasibility of using lithium iron phosphate battery as the energy storage device of PV system, the corresponding photovoltaic power storage system is designed.
The basic requirements of solar energy photovoltaic power generation system for energy storage
Solar power generation system cost is high, conversion efficiency is low, with the environment changes, so the requirements of the energy storage links higher. Solar PV system life is generally 20 years, with the requirements of the matching energy storage links with long life, stable performance, high energy efficiency, adaptability to environmental capacity and other characteristics.
At present, for the photovoltaic power generation system of energy storage technology is divided into electrochemical cells, flywheels, superconducting coils. In contrast, the flywheel energy storage and superconducting energy storage in the performance of chemical batteries with unparalleled advantages, will become the inevitable trend of the development of energy storage devices, but at this stage, due to technical and price reasons, chemical batteries Is still the main way of solar photovoltaic energy storage.