Research on Energy Storage Technology of Sodium-ion Batteries & Supercapacitors for Low Speed New Energy Vehicles

Aiming at the problems such as reduced capacity, reduced service life and longer charging time of lead-acid storage battery due to repeated charging and discharging, a low-speed sodium-ion battery and supercapacitor energy storage system for new energy vehicles was proposed. Firstly, the structure and characteristics of sodium-ion batteries and supercapacitors are analyzed. Secondly, the connection mode of hybrid energy storage system is determined, and its model is constructed, and its charging and discharging mode is studied. Finally, the sodium-ion battery and supercapacitor are connected in parallel, and the characteristics of high energy density of sodium-ion batteries and high power density of supercapacitors are utilized to optimize the energy storage system of new energy vehicles. The MATLAB simulation proves that the power fluctuation of the system can be reduced and the life of the system can be extended.