Method and device for estimating service life of battery of electrochemical energy storage power station

The invention discloses a battery life estimation method for an electrochemical energy storage power station, and the method comprises the steps: carrying out the regular maintenance of full charge and full discharge of a battery, and obtaining a first battery life estimation value SOH1 based on the ratio of the full discharge capacity Q to the rated capacity Q of the battery in the process; obtaining a second battery life estimated value SOH2 based on the current cycle index, the battery discharge depth, the working temperature and the rated cycle index which are counted under the battery cycle use working condition; obtaining a third battery life estimated value SOH3 through a neural network model algorithm based on historical data of battery operation voltage, current, temperature and cycle index; and carrying out weighted calculation on the SOH1, the SOH2 and the SOH3 to obtain the current service life SOH of the battery. The estimation precision of the battery life is improved, a basis is provided for va