Electrochemical energy storage system fault grading diagnosis early warning method, system and equipment

The invention discloses an electrochemical energy storage system fault grading diagnosis early warning method, system and device, and relates to the field of electrochemical energy storage, and the method comprises the steps: judging whether multi-dimensional detection information exceeds an information safety threshold; if yes, a first-level early warning signal is given; if not, carrying out second-stage diagnosis early warning by adopting a big data analysis method according to the temperature or the voltage acquired in real time, and identifying a potential fault single battery; judging whether the big data calculation information of the single battery exceeds a safety threshold value or not; if yes, a second-level early warning signal is given according to big data calculation information, and the number and the position of a potential fault battery monomer are given; and third-stage diagnosis early warning is carried out according to the multi-dimensional detection information corresponding to the poten