With the rapid development of the solar photovoltaic power generation industry, energy storage batteries have become the core support for the efficient utilization of solar energy. With outstanding advantages such as high energy density, long cycle life, high charge and discharge efficiency, and safety and stability, lithium-ion batteries have become the preferred energy storage carrier for solar energy storage systems. They are widely used in scenarios such as household distributed photovoltaics, industrial and commercial photovoltaic power stations, and large-scale energy storage power stations, effectively solving the pain points of intermittency and volatility of solar power generation, realizing the storage and rational allocation of electrical energy, promoting the photovoltaic industry to develop in a large-scale, stable and green direction, and helping to achieve the "dual carbon" goal.

　　The core demand of lithium-ion batteries for solar energy storage is to adapt to the characteristics of photovoltaic power generation, taking into account energy storage capacity, cycle stability and environmental adaptability. Compared with ordinary consumer lithium-ion batteries, lithium-ion batteries for solar energy storage focus more on deep cycle performance and long service life, need to withstand long-term charge and discharge cycles with slow capacity attenuation, and can adapt to complex outdoor environments, resisting harsh conditions such as high temperature, low temperature and humidity. At present, the mainstream lithium-ion batteries for solar energy storage are mainly divided into ternary lithium batteries and lithium iron phosphate batteries. Among them, lithium iron phosphate batteries have become the mainstream choice in the solar energy storage field due to their high safety, long cycle life and relatively controllable cost, while ternary lithium batteries, with higher energy density, are suitable for small-scale distributed energy storage scenarios.

　　Lithium-ion batteries for solar energy storage have multiple adaptive advantages: in terms of cycle life, high-quality products can reach 2000-5000 cycles, and some lithium iron phosphate batteries even exceed 10000 cycles, which can meet the long-term use needs of solar energy storage systems for 10-20 years, greatly reducing the cost of battery replacement; the charge and discharge efficiency can reach more than 90%, which can efficiently store the electrical energy generated by photovoltaic panels, reduce energy loss and improve solar energy utilization; built-in intelligent BMS battery management system can real-time monitor battery voltage, temperature and capacity, realize balanced charge and discharge control, and have overcharge, over-discharge, short-circuit and over-temperature protection functions to ensure the safe and stable operation of the energy storage system. In addition, it has high energy density, smaller volume and lighter weight under the same energy storage capacity, saving installation space, and is suitable for different installation scenarios such as household roofs and industrial and commercial plants; it has no heavy metal pollution and can be recycled, which conforms to the concept of green energy storage. Today, with the iteration of battery technology and the reduction of costs, lithium-ion batteries have further promoted the popularization of solar energy storage systems, realizing "self-generation and self-use, and surplus power storage", which not only relieves the pressure on the power grid, but also saves electricity costs for users, becoming the core driving force for the development of the new energy storage industry.