Lithium-ion batteries play an important role in new energy vehicles, but there is a problem of inaccurate battery positioning. The traditional filtering algorithm cannot solve the battery problem in new energy vehicles, and the effect is not ideal. In the era of new energy vehicles, the power battery, as the core source of vehicle power, directly affects the comprehensive performance of the vehicle. Among the many indicators to evaluate battery performance, the accurate estimation of battery state (SOC) undoubtedly occupies a pivotal position. Today, let's take a deep dive into the importance and subtlety of lithium-ion battery SOC algorithms in new energy vehicles.