Lithium iron phosphate batteries play two roles in the system. One is energy storage and regulation, and the other is load balancing. It converts the electrical energy output by the photovoltaic power generation system into chemical energy and stores it for use when the power supply is insufficient.

　　Lithium iron phosphate battery is a very important component in photovoltaic power generation system and must meet the following requirements:

　　① It is easy to realize multi-mode combination to meet higher working voltage and larger working current;

　　② The capacity and performance of the lithium iron phosphate battery can be detected and diagnosed, so that the control system can realize the dispatch control of the power station load under the condition of predicting the battery capacity and performance;

　　③ High safety and reliability: Under normal use, the normal service life of the battery is not less than 10 years; in the extreme case, even if a failure occurs, it is still in the control range, and there should be no explosion, combustion, etc. that endanger the safe operation of the power station Fault;

　　④ It has good fast response and large rate charging and discharging ability, generally requiring 1-10 times of charging and discharging ability;

　　⑤ Higher charge-discharge conversion efficiency, easy installation and maintenance, good environmental adaptability, and wide operating temperature range.

　　The rapid development of solar photovoltaic power generation systems puts forward higher requirements for energy storage systems. The characteristics of lithium iron phosphate batteries such as high energy storage efficiency, long life, and good charge and discharge performance determine that they are very suitable for new energy storage power sources. Its operation is stable and reliable, and the application prospect is good.