SOC ESTIMATION METHOD, MOBILE POWER SUPPLY AND READABLE STORAGE MEDIUM

An SOC estimation method includes calculate an electric quantity value of fixed step size for the mobile power supply, and then sequentially superimpose a unit electric quantity step by step to calculate an accumulated electric quantity from the last moment of SOC change, then compare the absolute value of the accumulated electric quantity with the electric quantity value of the fixed step size to determine whether the SOC value is added/subtracted the fixed step size or kept unchanged, and acquire an initial value of the accumulated electric quantity at the next moment. In above method, the division operation can be replaced by “if judgment” and addition/subtraction operations in actual programming, which greatly reduces the calculation amount for SOC estimation, thereby greatly reducing requirements for chip operational power and peripheral resources and equipment energy consumption, improving the speed and computing stability of SOC estimation.