METHOD, DEVICE AND SYSTEM FOR CALCULATING SOC OF BATTERY ON BASIS OF CHARGING STATUS OF CHARGING SIDE

A method, device and system for calculating a state of charge SOC of a battery on the basis of a charging state of a charging side relate to the technical field of battery management. The invention is intended to solve a problem in the prior art that an SOC of a rechargeable battery cannot be acquired by using information of a charging side. A method for calculating an SOC of a battery on the basis of a charging state of a charging side is provided, which comprises: acquiring, when a battery to be charged is being charged, an electrical parameter of a specific electrical component on the charging side of the battery to be charged (SI); calculating a current SOC of the battery to be charged by means of a pre-constructed estimation model on the basis of the electrical parameter to obtain a posterior probability distribution of the current SOC of the battery to be charged (S2); and obtaining the SOC of the battery to be charged on the basis of the posterior probability distribution of the current SOC of the battery to be charged (S3). According to the method, SOC information of the battery to be charged can be obtained directly on the charging side on the basis of existing hardware of the charging side and the battery to be charged.