Battery risk evaluation device and operating method thereof

Abstract

A battery risk assessment device for a battery module including a plurality of battery cells, including a data measurement unit configured to generate sensing data corresponding to the battery module; a deviation calculator configured to: calculate diffusion resistance data of the plurality of battery cells by using a Thevenin equivalent circuit of the battery module, and calculate deviation information based on the sensing data and the diffusion resistance data, wherein the deviation information indicates at least one from among a voltage deviation of the plurality of battery cells, a temperature deviation of the plurality of battery cells, and a diffusion resistance deviation of the plurality of battery cells; and a risk assessment unit configured to determine a battery risk state based on the deviation information.