SOC estimation method considering influence of external environment of soft package battery

The invention discloses an SOC estimation method considering the influence of the external environment of a soft package battery. The method comprises the following steps of: establishing a state equation and obtaining parameters; carrying out a battery capacity calibration experiment, a constant-current pulse experiment and an urban road driving condition experiment; obtaining a battery capacityunder a single influence factor by utilizing data recorded by the battery capacity calibration experiment, and performing fitting by utilizing the data of the battery capacity calibration experiment to obtain a function equation; obtaining open-circuit voltage values under different conditions by utilizing the data of the constant-current pulse experiment, fitting power functions under different conditions, and then further fitting influence factors by same-order term coefficients; and substituting the obtained corrections of the battery capacity and the battery open-circuit voltages based onthe external environment i