Low-temperature protection method and system for all-vanadium redox flow battery

The invention provides an all-vanadium redox flow battery low-temperature protection method and system, and relates to the technical field of batteries, and the method comprises the following steps: obtaining current temperature information of an all-vanadium redox flow battery; judging whether the current temperature information exceeds a temperature threshold value or not; when the current temperature information exceeds a temperature threshold value, inputting the current temperature information into a low-temperature grade classification model to obtain a low-temperature grade of the current temperature information; when the low-temperature level of the current temperature information is the first-level low-temperature level, determining the opening value of the liquid pipeline valve based on the mapping relation between the first-level low-temperature level and the opening value of the liquid pipeline valve; the opening degree of the liquid pipeline valve is adjusted based on the opening degree value of