Utility-scale systems combine energy arbitrage, frequency regulation, capacity payments, and transmission deferral benefits. Energy-storage technologies have rapidly developed under the impetus of carbon-neutrality goals, gradually becoming a crucial support for driving the energy transition. This paper systematically reviews the basic principles and research progress of current mainstream energy-storage technologies. NLR researchers are designing transformative energy storage solutions with the flexibility to respond to changing conditions, emergencies, and growing energy demands—ensuring energy is available when and where it's needed. The International Energy Agency (IEA) reports that renewable.