Many different storage technologies exist and can be used for varying applications. These technologies are also in various stages of maturity; pumped hydro storage has been in use for decades, researchers continue to innovate on battery chemistries today, flywheels have reached a commercial scale, and compressed air represents a large opportunity for bulk storage. Batteries are the most widely used method to store surplus energy during the day and provides energy to facilities during the night. Battery prices are continuously falling as technology improves, and Energetic can offer you many storage options to meet specific needs of a project.
A solid state battery has both solid electrodes and solid electrolytes. They are able to convert stored chemical energy into electrical energy. The electrolytes allow ions to move between the electrodes and terminals, allowing currents to flow from the battery to provide energy.
Types of Solid State Batteries include:
- Electrochemical Capacitors
- Lithium Ion Batteries
- Nickle Cadmium Batteries
- Sodium Sulfur Batteries
A flywheel is a mechanical battery that stores kinetic energy in a rotating mass. When electricity demand is low, the flywheel uses power from the electrical grid to drive a motor that spins the flywheel at high speeds, allowing the flywheel to store excess energy from the grid. When demand is high, the flywheel’s momentum causes the motor to act as a generator, which then slows down the flywheel, putting power back onto the grid.
Compressed Air energy storage takes air, compresses it, and stores it under pressure in underground caverns. When electricity demand is high, the pressurized air is heated and expanded in an expansion turbine which drives a generator for power production. There are various ways of storing the energy underground, one of which is via underwater accumulators.