Battery thermal runaway early warning system

The embodiment of the invention discloses a battery thermal runaway early warning system. The system comprises a signal acquisition module located in the lithium ion energy storage station, and a signal preprocessing module and an upper computer module which are located outside the lithium ion energy storage station, wherein the signal acquisition module is used for performing signal acquisition on a lithium ion battery in the lithium ion energy storage station and uploading the acquired acquisition signals to the signal preprocessing module, and the acquisition signals comprise at least two of an image signal, an infrared signal, a position signal and an environment signal; the signal preprocessing module is used for preprocessing the received acquisition signal to obtain a feature signal, and uploading the feature signal to the upper computer module when the feature signal exceeds a preset feature threshold value; and the upper computer module is used for carrying out early warning on the thermal runaway co