Island off-grid energy storage batteries are professional energy storage devices for independent power supply systems of remote islands, which are completely separated from the mainland public power grid and undertake the core task of independent power generation and power supply for islands. Most islands are far from the mainland, with difficult grid connection and high cost of power transmission, and renewable energy such as offshore wind energy and island photovoltaic energy is rich, making off-grid energy storage batteries the key to realizing self-sufficient island power supply.

The working mode of island off-grid energy storage batteries is independent and self-circulating. They cooperate with island photovoltaic, wind power and other power generation equipment to collect and store clean electric energy. Due to the unstable power generation of marine renewable energy, the batteries need to have high energy density and strong charge-discharge regulation ability. They can quickly store surplus power and release power in time when power generation is insufficient, balancing the mismatch between power generation and electricity consumption all day long.

In view of the special marine environment, island off-grid energy storage batteries are designed with salt spray corrosion resistance, moisture resistance and mildew resistance, which can resist the erosion of marine humid and salty air for a long time and ensure long-term stable operation in harsh marine environments. In addition, the supporting battery management system has independent energy scheduling and fault self-diagnosis functions, without relying on mainland grid dispatching. It can meet the daily electricity demand of island residents, marine aquaculture and island equipment operation, and is an important guarantee for the development and construction of marine resources.