Energy storage is the key technology of novel power system. As a medium and high temperature heat transfer and heat storage fluid

molten salt has the advantages of high heat capacity and good stability. It has been widely used in concentrated solar power(CSP) system

peak and frequency modification

green electricity consumption and other new energy fields. However

at present

the core components of molten salt energy storage system

such as the tanks

the electric heaters

the heat exchangers

and so on

are studied and developed based on the demand of CSP technology. The other application scenarios are not sufficiently considered. However

in different application scenarios

the working temperature range

heating and heat exchange methods have different requirements on molten salt. Therefore

the research status and technical achievements of the key technologies of molten salt heat storage are summarized. The development path of molten salt energy storage technology and its application in novel power systems are studied. According to the different application scenarios

the requirements on molten salt parameters and the suitable types of storage tanks and heat exchangers are illustrated.