Overview of lithium-ion battery SOC estimation

In this paper, different types of batteries are summarized which are used in electric vehicles. The performance of the battery, including material, duration, environment impact such factors can seriously restrain the development of renewable vehicles. Battery state-of-charge (SOC) plays an important role in vehicle driving regulation. Hence, the methods of battery SOC estimation based on different kinds of lithium-ion batteries are discussed. Each methods has its own advantages and disadvantages in the SOC estimation. Only the combination of two or more methods for SOC estimation can provide full and more accurate SOC estimation in all applied situations, i.e., driving or still states.