Abstract

The invention relates to a system and method for storing and supplying electricity using salinity gradient, based on water desalination systems. The industrial salinity gradient battery or system comprises a set of technologies that act in a coordinated manner, allowing the battery to be charged when there is available electricity, or to be discharged when the contained energy needs to be extracted for use. The battery consists of a closed system free from encrusting salts, organic compounds and microorganisms, the system therefore being resistant to fouling and encrustations. The maximum charge storage is achieved with a highly water-soluble salt that is stable in the temperature ranges used and pH neutral. The battery also comprises sealed storage tanks, where water and diluted brine mixture are accumulated. This type of technology is especially useful for damping changes in renewable electricity production.