Dynamic estimation method for electric quantity of storage battery, battery management system and electric vehicle

The invention discloses an electric quantity dynamic evaluation method of a storage battery, a battery management system and an electric vehicle. The method comprises the following steps: S01, obtaining an initial electric quantity value Qc0, a weight value K and a charge and discharge characteristic curve of a current period according to a battery state of the storage battery; s02, calculating an electric quantity change value of the storage battery in the current period by adopting a coulombmeter method, correcting the electric quantity change value according to the weight value K, and adding or subtracting the corrected electric quantity change value and an initial electric quantity value Qc0 to obtain a pre-corrected first electric quantity value Qc1 of the storage battery; and S03, when the current voltage value of the storage battery reaches the open-circuit voltage value Vi corresponding to the ith correction point, re-correcting the first electric quantity value Qc1 according to the electric quantity