Commonly used evaluation indicators include energy storage density, energy storage power, energy storage efficiency, energy storage price, and environmental impact.
Different applications have different energy storage requirements, but in summary, a good energy storage system has the following common characteristics.
1. High energy storage per unit volume (volume heat density), meaning the system stores as much energy as possible. High-energy batteries, for example, are popular with consumers because they have a higher energy density and longer lifespan than ordinary batteries.
2. It has good load regulation performance. When an energy storage system is in use, it needs to adjust the amount of energy released according to the requirements of the energy user. The quality of the load regulation performance determines the quality of the system performance.
3. High energy storage efficiency is essential. Energy storage relies heavily on energy transfer and conversion technologies, so the energy storage system should be able to receive and release energy at the highest rate without requiring excessive driving force. Simultaneously, it should minimize losses during energy storage, such as leakage, evaporation, and friction, to maintain high energy storage efficiency.
4. The system has low cost and reliable long-term operation. If energy storage devices are not economically viable, they cannot be widely adopted.
